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![Darrick J. Wong](/assets/img/avatar_default.png)
If we try to recover a log intent item and the operation fails due to filesystem corruption, dump the contents of the item to the log for further analysis. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
707 lines
19 KiB
C
707 lines
19 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2016 Oracle. All Rights Reserved.
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* Author: Darrick J. Wong <darrick.wong@oracle.com>
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_bit.h"
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#include "xfs_shared.h"
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#include "xfs_mount.h"
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#include "xfs_defer.h"
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#include "xfs_trans.h"
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#include "xfs_trans_priv.h"
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#include "xfs_refcount_item.h"
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#include "xfs_log.h"
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#include "xfs_refcount.h"
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#include "xfs_error.h"
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#include "xfs_log_priv.h"
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#include "xfs_log_recover.h"
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kmem_zone_t *xfs_cui_zone;
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kmem_zone_t *xfs_cud_zone;
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static const struct xfs_item_ops xfs_cui_item_ops;
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static inline struct xfs_cui_log_item *CUI_ITEM(struct xfs_log_item *lip)
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{
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return container_of(lip, struct xfs_cui_log_item, cui_item);
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}
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STATIC void
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xfs_cui_item_free(
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struct xfs_cui_log_item *cuip)
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{
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if (cuip->cui_format.cui_nextents > XFS_CUI_MAX_FAST_EXTENTS)
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kmem_free(cuip);
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else
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kmem_cache_free(xfs_cui_zone, cuip);
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}
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/*
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* Freeing the CUI requires that we remove it from the AIL if it has already
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* been placed there. However, the CUI may not yet have been placed in the AIL
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* when called by xfs_cui_release() from CUD processing due to the ordering of
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* committed vs unpin operations in bulk insert operations. Hence the reference
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* count to ensure only the last caller frees the CUI.
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*/
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STATIC void
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xfs_cui_release(
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struct xfs_cui_log_item *cuip)
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{
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ASSERT(atomic_read(&cuip->cui_refcount) > 0);
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if (atomic_dec_and_test(&cuip->cui_refcount)) {
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xfs_trans_ail_delete(&cuip->cui_item, SHUTDOWN_LOG_IO_ERROR);
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xfs_cui_item_free(cuip);
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}
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}
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STATIC void
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xfs_cui_item_size(
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struct xfs_log_item *lip,
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int *nvecs,
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int *nbytes)
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{
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struct xfs_cui_log_item *cuip = CUI_ITEM(lip);
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*nvecs += 1;
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*nbytes += xfs_cui_log_format_sizeof(cuip->cui_format.cui_nextents);
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}
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/*
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* This is called to fill in the vector of log iovecs for the
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* given cui log item. We use only 1 iovec, and we point that
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* at the cui_log_format structure embedded in the cui item.
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* It is at this point that we assert that all of the extent
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* slots in the cui item have been filled.
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*/
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STATIC void
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xfs_cui_item_format(
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struct xfs_log_item *lip,
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struct xfs_log_vec *lv)
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{
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struct xfs_cui_log_item *cuip = CUI_ITEM(lip);
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struct xfs_log_iovec *vecp = NULL;
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ASSERT(atomic_read(&cuip->cui_next_extent) ==
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cuip->cui_format.cui_nextents);
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cuip->cui_format.cui_type = XFS_LI_CUI;
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cuip->cui_format.cui_size = 1;
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xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_CUI_FORMAT, &cuip->cui_format,
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xfs_cui_log_format_sizeof(cuip->cui_format.cui_nextents));
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}
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/*
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* The unpin operation is the last place an CUI is manipulated in the log. It is
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* either inserted in the AIL or aborted in the event of a log I/O error. In
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* either case, the CUI transaction has been successfully committed to make it
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* this far. Therefore, we expect whoever committed the CUI to either construct
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* and commit the CUD or drop the CUD's reference in the event of error. Simply
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* drop the log's CUI reference now that the log is done with it.
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*/
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STATIC void
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xfs_cui_item_unpin(
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struct xfs_log_item *lip,
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int remove)
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{
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struct xfs_cui_log_item *cuip = CUI_ITEM(lip);
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xfs_cui_release(cuip);
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}
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/*
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* The CUI has been either committed or aborted if the transaction has been
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* cancelled. If the transaction was cancelled, an CUD isn't going to be
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* constructed and thus we free the CUI here directly.
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*/
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STATIC void
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xfs_cui_item_release(
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struct xfs_log_item *lip)
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{
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xfs_cui_release(CUI_ITEM(lip));
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}
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/*
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* Allocate and initialize an cui item with the given number of extents.
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*/
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STATIC struct xfs_cui_log_item *
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xfs_cui_init(
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struct xfs_mount *mp,
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uint nextents)
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{
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struct xfs_cui_log_item *cuip;
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ASSERT(nextents > 0);
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if (nextents > XFS_CUI_MAX_FAST_EXTENTS)
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cuip = kmem_zalloc(xfs_cui_log_item_sizeof(nextents),
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0);
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else
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cuip = kmem_cache_zalloc(xfs_cui_zone,
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GFP_KERNEL | __GFP_NOFAIL);
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xfs_log_item_init(mp, &cuip->cui_item, XFS_LI_CUI, &xfs_cui_item_ops);
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cuip->cui_format.cui_nextents = nextents;
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cuip->cui_format.cui_id = (uintptr_t)(void *)cuip;
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atomic_set(&cuip->cui_next_extent, 0);
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atomic_set(&cuip->cui_refcount, 2);
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return cuip;
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}
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static inline struct xfs_cud_log_item *CUD_ITEM(struct xfs_log_item *lip)
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{
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return container_of(lip, struct xfs_cud_log_item, cud_item);
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}
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STATIC void
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xfs_cud_item_size(
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struct xfs_log_item *lip,
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int *nvecs,
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int *nbytes)
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{
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*nvecs += 1;
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*nbytes += sizeof(struct xfs_cud_log_format);
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}
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/*
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* This is called to fill in the vector of log iovecs for the
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* given cud log item. We use only 1 iovec, and we point that
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* at the cud_log_format structure embedded in the cud item.
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* It is at this point that we assert that all of the extent
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* slots in the cud item have been filled.
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*/
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STATIC void
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xfs_cud_item_format(
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struct xfs_log_item *lip,
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struct xfs_log_vec *lv)
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{
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struct xfs_cud_log_item *cudp = CUD_ITEM(lip);
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struct xfs_log_iovec *vecp = NULL;
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cudp->cud_format.cud_type = XFS_LI_CUD;
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cudp->cud_format.cud_size = 1;
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xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_CUD_FORMAT, &cudp->cud_format,
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sizeof(struct xfs_cud_log_format));
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}
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/*
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* The CUD is either committed or aborted if the transaction is cancelled. If
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* the transaction is cancelled, drop our reference to the CUI and free the
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* CUD.
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*/
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STATIC void
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xfs_cud_item_release(
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struct xfs_log_item *lip)
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{
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struct xfs_cud_log_item *cudp = CUD_ITEM(lip);
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xfs_cui_release(cudp->cud_cuip);
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kmem_cache_free(xfs_cud_zone, cudp);
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}
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static const struct xfs_item_ops xfs_cud_item_ops = {
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.flags = XFS_ITEM_RELEASE_WHEN_COMMITTED,
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.iop_size = xfs_cud_item_size,
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.iop_format = xfs_cud_item_format,
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.iop_release = xfs_cud_item_release,
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};
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static struct xfs_cud_log_item *
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xfs_trans_get_cud(
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struct xfs_trans *tp,
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struct xfs_cui_log_item *cuip)
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{
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struct xfs_cud_log_item *cudp;
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cudp = kmem_cache_zalloc(xfs_cud_zone, GFP_KERNEL | __GFP_NOFAIL);
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xfs_log_item_init(tp->t_mountp, &cudp->cud_item, XFS_LI_CUD,
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&xfs_cud_item_ops);
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cudp->cud_cuip = cuip;
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cudp->cud_format.cud_cui_id = cuip->cui_format.cui_id;
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xfs_trans_add_item(tp, &cudp->cud_item);
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return cudp;
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}
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/*
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* Finish an refcount update and log it to the CUD. Note that the
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* transaction is marked dirty regardless of whether the refcount
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* update succeeds or fails to support the CUI/CUD lifecycle rules.
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*/
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static int
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xfs_trans_log_finish_refcount_update(
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struct xfs_trans *tp,
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struct xfs_cud_log_item *cudp,
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enum xfs_refcount_intent_type type,
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xfs_fsblock_t startblock,
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xfs_extlen_t blockcount,
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xfs_fsblock_t *new_fsb,
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xfs_extlen_t *new_len,
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struct xfs_btree_cur **pcur)
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{
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int error;
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error = xfs_refcount_finish_one(tp, type, startblock,
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blockcount, new_fsb, new_len, pcur);
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/*
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* Mark the transaction dirty, even on error. This ensures the
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* transaction is aborted, which:
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*
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* 1.) releases the CUI and frees the CUD
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* 2.) shuts down the filesystem
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*/
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tp->t_flags |= XFS_TRANS_DIRTY;
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set_bit(XFS_LI_DIRTY, &cudp->cud_item.li_flags);
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return error;
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}
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/* Sort refcount intents by AG. */
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static int
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xfs_refcount_update_diff_items(
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void *priv,
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const struct list_head *a,
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const struct list_head *b)
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{
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struct xfs_mount *mp = priv;
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struct xfs_refcount_intent *ra;
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struct xfs_refcount_intent *rb;
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ra = container_of(a, struct xfs_refcount_intent, ri_list);
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rb = container_of(b, struct xfs_refcount_intent, ri_list);
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return XFS_FSB_TO_AGNO(mp, ra->ri_startblock) -
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XFS_FSB_TO_AGNO(mp, rb->ri_startblock);
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}
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/* Set the phys extent flags for this reverse mapping. */
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static void
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xfs_trans_set_refcount_flags(
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struct xfs_phys_extent *refc,
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enum xfs_refcount_intent_type type)
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{
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refc->pe_flags = 0;
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switch (type) {
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case XFS_REFCOUNT_INCREASE:
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case XFS_REFCOUNT_DECREASE:
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case XFS_REFCOUNT_ALLOC_COW:
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case XFS_REFCOUNT_FREE_COW:
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refc->pe_flags |= type;
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break;
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default:
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ASSERT(0);
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}
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}
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/* Log refcount updates in the intent item. */
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STATIC void
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xfs_refcount_update_log_item(
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struct xfs_trans *tp,
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struct xfs_cui_log_item *cuip,
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struct xfs_refcount_intent *refc)
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{
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uint next_extent;
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struct xfs_phys_extent *ext;
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tp->t_flags |= XFS_TRANS_DIRTY;
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set_bit(XFS_LI_DIRTY, &cuip->cui_item.li_flags);
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/*
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* atomic_inc_return gives us the value after the increment;
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* we want to use it as an array index so we need to subtract 1 from
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* it.
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*/
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next_extent = atomic_inc_return(&cuip->cui_next_extent) - 1;
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ASSERT(next_extent < cuip->cui_format.cui_nextents);
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ext = &cuip->cui_format.cui_extents[next_extent];
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ext->pe_startblock = refc->ri_startblock;
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ext->pe_len = refc->ri_blockcount;
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xfs_trans_set_refcount_flags(ext, refc->ri_type);
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}
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static struct xfs_log_item *
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xfs_refcount_update_create_intent(
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struct xfs_trans *tp,
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struct list_head *items,
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unsigned int count,
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bool sort)
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{
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struct xfs_mount *mp = tp->t_mountp;
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struct xfs_cui_log_item *cuip = xfs_cui_init(mp, count);
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struct xfs_refcount_intent *refc;
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ASSERT(count > 0);
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xfs_trans_add_item(tp, &cuip->cui_item);
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if (sort)
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list_sort(mp, items, xfs_refcount_update_diff_items);
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list_for_each_entry(refc, items, ri_list)
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xfs_refcount_update_log_item(tp, cuip, refc);
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return &cuip->cui_item;
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}
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/* Get an CUD so we can process all the deferred refcount updates. */
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static struct xfs_log_item *
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xfs_refcount_update_create_done(
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struct xfs_trans *tp,
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struct xfs_log_item *intent,
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unsigned int count)
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{
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return &xfs_trans_get_cud(tp, CUI_ITEM(intent))->cud_item;
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}
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/* Process a deferred refcount update. */
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STATIC int
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xfs_refcount_update_finish_item(
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struct xfs_trans *tp,
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struct xfs_log_item *done,
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struct list_head *item,
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struct xfs_btree_cur **state)
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{
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struct xfs_refcount_intent *refc;
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xfs_fsblock_t new_fsb;
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xfs_extlen_t new_aglen;
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int error;
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refc = container_of(item, struct xfs_refcount_intent, ri_list);
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error = xfs_trans_log_finish_refcount_update(tp, CUD_ITEM(done),
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refc->ri_type, refc->ri_startblock, refc->ri_blockcount,
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&new_fsb, &new_aglen, state);
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/* Did we run out of reservation? Requeue what we didn't finish. */
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if (!error && new_aglen > 0) {
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ASSERT(refc->ri_type == XFS_REFCOUNT_INCREASE ||
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refc->ri_type == XFS_REFCOUNT_DECREASE);
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refc->ri_startblock = new_fsb;
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refc->ri_blockcount = new_aglen;
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return -EAGAIN;
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}
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kmem_free(refc);
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return error;
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}
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/* Abort all pending CUIs. */
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STATIC void
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xfs_refcount_update_abort_intent(
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struct xfs_log_item *intent)
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{
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xfs_cui_release(CUI_ITEM(intent));
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}
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/* Cancel a deferred refcount update. */
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STATIC void
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xfs_refcount_update_cancel_item(
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struct list_head *item)
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{
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struct xfs_refcount_intent *refc;
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refc = container_of(item, struct xfs_refcount_intent, ri_list);
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kmem_free(refc);
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}
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const struct xfs_defer_op_type xfs_refcount_update_defer_type = {
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.max_items = XFS_CUI_MAX_FAST_EXTENTS,
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.create_intent = xfs_refcount_update_create_intent,
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.abort_intent = xfs_refcount_update_abort_intent,
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.create_done = xfs_refcount_update_create_done,
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.finish_item = xfs_refcount_update_finish_item,
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.finish_cleanup = xfs_refcount_finish_one_cleanup,
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.cancel_item = xfs_refcount_update_cancel_item,
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};
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/* Is this recovered CUI ok? */
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static inline bool
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xfs_cui_validate_phys(
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struct xfs_mount *mp,
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struct xfs_phys_extent *refc)
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{
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if (!xfs_sb_version_hasreflink(&mp->m_sb))
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return false;
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if (refc->pe_flags & ~XFS_REFCOUNT_EXTENT_FLAGS)
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return false;
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switch (refc->pe_flags & XFS_REFCOUNT_EXTENT_TYPE_MASK) {
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case XFS_REFCOUNT_INCREASE:
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case XFS_REFCOUNT_DECREASE:
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case XFS_REFCOUNT_ALLOC_COW:
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case XFS_REFCOUNT_FREE_COW:
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break;
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default:
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return false;
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}
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return xfs_verify_fsbext(mp, refc->pe_startblock, refc->pe_len);
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}
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/*
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* Process a refcount update intent item that was recovered from the log.
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* We need to update the refcountbt.
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*/
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STATIC int
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xfs_cui_item_recover(
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struct xfs_log_item *lip,
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struct list_head *capture_list)
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{
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struct xfs_bmbt_irec irec;
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struct xfs_cui_log_item *cuip = CUI_ITEM(lip);
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struct xfs_phys_extent *refc;
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struct xfs_cud_log_item *cudp;
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struct xfs_trans *tp;
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struct xfs_btree_cur *rcur = NULL;
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struct xfs_mount *mp = lip->li_mountp;
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xfs_fsblock_t new_fsb;
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xfs_extlen_t new_len;
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unsigned int refc_type;
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bool requeue_only = false;
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enum xfs_refcount_intent_type type;
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int i;
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int error = 0;
|
|
|
|
/*
|
|
* First check the validity of the extents described by the
|
|
* CUI. If any are bad, then assume that all are bad and
|
|
* just toss the CUI.
|
|
*/
|
|
for (i = 0; i < cuip->cui_format.cui_nextents; i++) {
|
|
if (!xfs_cui_validate_phys(mp,
|
|
&cuip->cui_format.cui_extents[i])) {
|
|
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
|
|
&cuip->cui_format,
|
|
sizeof(cuip->cui_format));
|
|
return -EFSCORRUPTED;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Under normal operation, refcount updates are deferred, so we
|
|
* wouldn't be adding them directly to a transaction. All
|
|
* refcount updates manage reservation usage internally and
|
|
* dynamically by deferring work that won't fit in the
|
|
* transaction. Normally, any work that needs to be deferred
|
|
* gets attached to the same defer_ops that scheduled the
|
|
* refcount update. However, we're in log recovery here, so we
|
|
* use the passed in defer_ops and to finish up any work that
|
|
* doesn't fit. We need to reserve enough blocks to handle a
|
|
* full btree split on either end of the refcount range.
|
|
*/
|
|
error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate,
|
|
mp->m_refc_maxlevels * 2, 0, XFS_TRANS_RESERVE, &tp);
|
|
if (error)
|
|
return error;
|
|
|
|
cudp = xfs_trans_get_cud(tp, cuip);
|
|
|
|
for (i = 0; i < cuip->cui_format.cui_nextents; i++) {
|
|
refc = &cuip->cui_format.cui_extents[i];
|
|
refc_type = refc->pe_flags & XFS_REFCOUNT_EXTENT_TYPE_MASK;
|
|
switch (refc_type) {
|
|
case XFS_REFCOUNT_INCREASE:
|
|
case XFS_REFCOUNT_DECREASE:
|
|
case XFS_REFCOUNT_ALLOC_COW:
|
|
case XFS_REFCOUNT_FREE_COW:
|
|
type = refc_type;
|
|
break;
|
|
default:
|
|
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, mp);
|
|
error = -EFSCORRUPTED;
|
|
goto abort_error;
|
|
}
|
|
if (requeue_only) {
|
|
new_fsb = refc->pe_startblock;
|
|
new_len = refc->pe_len;
|
|
} else
|
|
error = xfs_trans_log_finish_refcount_update(tp, cudp,
|
|
type, refc->pe_startblock, refc->pe_len,
|
|
&new_fsb, &new_len, &rcur);
|
|
if (error == -EFSCORRUPTED)
|
|
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
|
|
refc, sizeof(*refc));
|
|
if (error)
|
|
goto abort_error;
|
|
|
|
/* Requeue what we didn't finish. */
|
|
if (new_len > 0) {
|
|
irec.br_startblock = new_fsb;
|
|
irec.br_blockcount = new_len;
|
|
switch (type) {
|
|
case XFS_REFCOUNT_INCREASE:
|
|
xfs_refcount_increase_extent(tp, &irec);
|
|
break;
|
|
case XFS_REFCOUNT_DECREASE:
|
|
xfs_refcount_decrease_extent(tp, &irec);
|
|
break;
|
|
case XFS_REFCOUNT_ALLOC_COW:
|
|
xfs_refcount_alloc_cow_extent(tp,
|
|
irec.br_startblock,
|
|
irec.br_blockcount);
|
|
break;
|
|
case XFS_REFCOUNT_FREE_COW:
|
|
xfs_refcount_free_cow_extent(tp,
|
|
irec.br_startblock,
|
|
irec.br_blockcount);
|
|
break;
|
|
default:
|
|
ASSERT(0);
|
|
}
|
|
requeue_only = true;
|
|
}
|
|
}
|
|
|
|
xfs_refcount_finish_one_cleanup(tp, rcur, error);
|
|
return xfs_defer_ops_capture_and_commit(tp, NULL, capture_list);
|
|
|
|
abort_error:
|
|
xfs_refcount_finish_one_cleanup(tp, rcur, error);
|
|
xfs_trans_cancel(tp);
|
|
return error;
|
|
}
|
|
|
|
STATIC bool
|
|
xfs_cui_item_match(
|
|
struct xfs_log_item *lip,
|
|
uint64_t intent_id)
|
|
{
|
|
return CUI_ITEM(lip)->cui_format.cui_id == intent_id;
|
|
}
|
|
|
|
/* Relog an intent item to push the log tail forward. */
|
|
static struct xfs_log_item *
|
|
xfs_cui_item_relog(
|
|
struct xfs_log_item *intent,
|
|
struct xfs_trans *tp)
|
|
{
|
|
struct xfs_cud_log_item *cudp;
|
|
struct xfs_cui_log_item *cuip;
|
|
struct xfs_phys_extent *extp;
|
|
unsigned int count;
|
|
|
|
count = CUI_ITEM(intent)->cui_format.cui_nextents;
|
|
extp = CUI_ITEM(intent)->cui_format.cui_extents;
|
|
|
|
tp->t_flags |= XFS_TRANS_DIRTY;
|
|
cudp = xfs_trans_get_cud(tp, CUI_ITEM(intent));
|
|
set_bit(XFS_LI_DIRTY, &cudp->cud_item.li_flags);
|
|
|
|
cuip = xfs_cui_init(tp->t_mountp, count);
|
|
memcpy(cuip->cui_format.cui_extents, extp, count * sizeof(*extp));
|
|
atomic_set(&cuip->cui_next_extent, count);
|
|
xfs_trans_add_item(tp, &cuip->cui_item);
|
|
set_bit(XFS_LI_DIRTY, &cuip->cui_item.li_flags);
|
|
return &cuip->cui_item;
|
|
}
|
|
|
|
static const struct xfs_item_ops xfs_cui_item_ops = {
|
|
.iop_size = xfs_cui_item_size,
|
|
.iop_format = xfs_cui_item_format,
|
|
.iop_unpin = xfs_cui_item_unpin,
|
|
.iop_release = xfs_cui_item_release,
|
|
.iop_recover = xfs_cui_item_recover,
|
|
.iop_match = xfs_cui_item_match,
|
|
.iop_relog = xfs_cui_item_relog,
|
|
};
|
|
|
|
/*
|
|
* Copy an CUI format buffer from the given buf, and into the destination
|
|
* CUI format structure. The CUI/CUD items were designed not to need any
|
|
* special alignment handling.
|
|
*/
|
|
static int
|
|
xfs_cui_copy_format(
|
|
struct xfs_log_iovec *buf,
|
|
struct xfs_cui_log_format *dst_cui_fmt)
|
|
{
|
|
struct xfs_cui_log_format *src_cui_fmt;
|
|
uint len;
|
|
|
|
src_cui_fmt = buf->i_addr;
|
|
len = xfs_cui_log_format_sizeof(src_cui_fmt->cui_nextents);
|
|
|
|
if (buf->i_len == len) {
|
|
memcpy(dst_cui_fmt, src_cui_fmt, len);
|
|
return 0;
|
|
}
|
|
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, NULL);
|
|
return -EFSCORRUPTED;
|
|
}
|
|
|
|
/*
|
|
* This routine is called to create an in-core extent refcount update
|
|
* item from the cui format structure which was logged on disk.
|
|
* It allocates an in-core cui, copies the extents from the format
|
|
* structure into it, and adds the cui to the AIL with the given
|
|
* LSN.
|
|
*/
|
|
STATIC int
|
|
xlog_recover_cui_commit_pass2(
|
|
struct xlog *log,
|
|
struct list_head *buffer_list,
|
|
struct xlog_recover_item *item,
|
|
xfs_lsn_t lsn)
|
|
{
|
|
int error;
|
|
struct xfs_mount *mp = log->l_mp;
|
|
struct xfs_cui_log_item *cuip;
|
|
struct xfs_cui_log_format *cui_formatp;
|
|
|
|
cui_formatp = item->ri_buf[0].i_addr;
|
|
|
|
cuip = xfs_cui_init(mp, cui_formatp->cui_nextents);
|
|
error = xfs_cui_copy_format(&item->ri_buf[0], &cuip->cui_format);
|
|
if (error) {
|
|
xfs_cui_item_free(cuip);
|
|
return error;
|
|
}
|
|
atomic_set(&cuip->cui_next_extent, cui_formatp->cui_nextents);
|
|
/*
|
|
* Insert the intent into the AIL directly and drop one reference so
|
|
* that finishing or canceling the work will drop the other.
|
|
*/
|
|
xfs_trans_ail_insert(log->l_ailp, &cuip->cui_item, lsn);
|
|
xfs_cui_release(cuip);
|
|
return 0;
|
|
}
|
|
|
|
const struct xlog_recover_item_ops xlog_cui_item_ops = {
|
|
.item_type = XFS_LI_CUI,
|
|
.commit_pass2 = xlog_recover_cui_commit_pass2,
|
|
};
|
|
|
|
/*
|
|
* This routine is called when an CUD format structure is found in a committed
|
|
* transaction in the log. Its purpose is to cancel the corresponding CUI if it
|
|
* was still in the log. To do this it searches the AIL for the CUI with an id
|
|
* equal to that in the CUD format structure. If we find it we drop the CUD
|
|
* reference, which removes the CUI from the AIL and frees it.
|
|
*/
|
|
STATIC int
|
|
xlog_recover_cud_commit_pass2(
|
|
struct xlog *log,
|
|
struct list_head *buffer_list,
|
|
struct xlog_recover_item *item,
|
|
xfs_lsn_t lsn)
|
|
{
|
|
struct xfs_cud_log_format *cud_formatp;
|
|
|
|
cud_formatp = item->ri_buf[0].i_addr;
|
|
if (item->ri_buf[0].i_len != sizeof(struct xfs_cud_log_format)) {
|
|
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, log->l_mp);
|
|
return -EFSCORRUPTED;
|
|
}
|
|
|
|
xlog_recover_release_intent(log, XFS_LI_CUI, cud_formatp->cud_cui_id);
|
|
return 0;
|
|
}
|
|
|
|
const struct xlog_recover_item_ops xlog_cud_item_ops = {
|
|
.item_type = XFS_LI_CUD,
|
|
.commit_pass2 = xlog_recover_cud_commit_pass2,
|
|
};
|