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32a2b11f46
Use kmem_cache_zalloc() directly. With the exception of xlog_ticket_alloc() which will be dealt on the next patch for readability. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
671 lines
18 KiB
C
671 lines
18 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_inode.h"
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#include "xfs_trans.h"
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#include "xfs_trans_priv.h"
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#include "xfs_bmap_item.h"
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#include "xfs_log.h"
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#include "xfs_bmap.h"
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#include "xfs_icache.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_trans_space.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_bui_zone;
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kmem_zone_t *xfs_bud_zone;
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static const struct xfs_item_ops xfs_bui_item_ops;
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static inline struct xfs_bui_log_item *BUI_ITEM(struct xfs_log_item *lip)
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{
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return container_of(lip, struct xfs_bui_log_item, bui_item);
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}
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STATIC void
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xfs_bui_item_free(
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struct xfs_bui_log_item *buip)
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{
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kmem_cache_free(xfs_bui_zone, buip);
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}
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/*
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* Freeing the BUI requires that we remove it from the AIL if it has already
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* been placed there. However, the BUI may not yet have been placed in the AIL
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* when called by xfs_bui_release() from BUD 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 BUI.
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*/
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STATIC void
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xfs_bui_release(
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struct xfs_bui_log_item *buip)
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{
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ASSERT(atomic_read(&buip->bui_refcount) > 0);
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if (atomic_dec_and_test(&buip->bui_refcount)) {
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xfs_trans_ail_delete(&buip->bui_item, SHUTDOWN_LOG_IO_ERROR);
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xfs_bui_item_free(buip);
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}
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}
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STATIC void
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xfs_bui_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_bui_log_item *buip = BUI_ITEM(lip);
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*nvecs += 1;
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*nbytes += xfs_bui_log_format_sizeof(buip->bui_format.bui_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 bui log item. We use only 1 iovec, and we point that
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* at the bui_log_format structure embedded in the bui 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 bui item have been filled.
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*/
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STATIC void
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xfs_bui_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_bui_log_item *buip = BUI_ITEM(lip);
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struct xfs_log_iovec *vecp = NULL;
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ASSERT(atomic_read(&buip->bui_next_extent) ==
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buip->bui_format.bui_nextents);
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buip->bui_format.bui_type = XFS_LI_BUI;
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buip->bui_format.bui_size = 1;
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xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_BUI_FORMAT, &buip->bui_format,
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xfs_bui_log_format_sizeof(buip->bui_format.bui_nextents));
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}
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/*
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* The unpin operation is the last place an BUI 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 BUI transaction has been successfully committed to make it
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* this far. Therefore, we expect whoever committed the BUI to either construct
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* and commit the BUD or drop the BUD's reference in the event of error. Simply
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* drop the log's BUI reference now that the log is done with it.
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*/
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STATIC void
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xfs_bui_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_bui_log_item *buip = BUI_ITEM(lip);
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xfs_bui_release(buip);
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}
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/*
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* The BUI has been either committed or aborted if the transaction has been
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* cancelled. If the transaction was cancelled, an BUD isn't going to be
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* constructed and thus we free the BUI here directly.
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*/
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STATIC void
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xfs_bui_item_release(
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struct xfs_log_item *lip)
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{
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xfs_bui_release(BUI_ITEM(lip));
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}
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/*
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* Allocate and initialize an bui item with the given number of extents.
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*/
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STATIC struct xfs_bui_log_item *
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xfs_bui_init(
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struct xfs_mount *mp)
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{
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struct xfs_bui_log_item *buip;
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buip = kmem_cache_zalloc(xfs_bui_zone, GFP_KERNEL | __GFP_NOFAIL);
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xfs_log_item_init(mp, &buip->bui_item, XFS_LI_BUI, &xfs_bui_item_ops);
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buip->bui_format.bui_nextents = XFS_BUI_MAX_FAST_EXTENTS;
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buip->bui_format.bui_id = (uintptr_t)(void *)buip;
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atomic_set(&buip->bui_next_extent, 0);
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atomic_set(&buip->bui_refcount, 2);
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return buip;
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}
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static inline struct xfs_bud_log_item *BUD_ITEM(struct xfs_log_item *lip)
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{
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return container_of(lip, struct xfs_bud_log_item, bud_item);
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}
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STATIC void
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xfs_bud_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_bud_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 bud log item. We use only 1 iovec, and we point that
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* at the bud_log_format structure embedded in the bud 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 bud item have been filled.
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*/
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STATIC void
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xfs_bud_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_bud_log_item *budp = BUD_ITEM(lip);
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struct xfs_log_iovec *vecp = NULL;
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budp->bud_format.bud_type = XFS_LI_BUD;
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budp->bud_format.bud_size = 1;
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xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_BUD_FORMAT, &budp->bud_format,
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sizeof(struct xfs_bud_log_format));
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}
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/*
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* The BUD is either committed or aborted if the transaction is cancelled. If
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* the transaction is cancelled, drop our reference to the BUI and free the
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* BUD.
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*/
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STATIC void
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xfs_bud_item_release(
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struct xfs_log_item *lip)
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{
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struct xfs_bud_log_item *budp = BUD_ITEM(lip);
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xfs_bui_release(budp->bud_buip);
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kmem_cache_free(xfs_bud_zone, budp);
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}
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static const struct xfs_item_ops xfs_bud_item_ops = {
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.flags = XFS_ITEM_RELEASE_WHEN_COMMITTED,
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.iop_size = xfs_bud_item_size,
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.iop_format = xfs_bud_item_format,
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.iop_release = xfs_bud_item_release,
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};
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static struct xfs_bud_log_item *
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xfs_trans_get_bud(
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struct xfs_trans *tp,
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struct xfs_bui_log_item *buip)
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{
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struct xfs_bud_log_item *budp;
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budp = kmem_cache_zalloc(xfs_bud_zone, GFP_KERNEL | __GFP_NOFAIL);
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xfs_log_item_init(tp->t_mountp, &budp->bud_item, XFS_LI_BUD,
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&xfs_bud_item_ops);
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budp->bud_buip = buip;
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budp->bud_format.bud_bui_id = buip->bui_format.bui_id;
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xfs_trans_add_item(tp, &budp->bud_item);
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return budp;
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}
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/*
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* Finish an bmap update and log it to the BUD. Note that the
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* transaction is marked dirty regardless of whether the bmap update
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* succeeds or fails to support the BUI/BUD lifecycle rules.
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*/
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static int
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xfs_trans_log_finish_bmap_update(
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struct xfs_trans *tp,
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struct xfs_bud_log_item *budp,
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enum xfs_bmap_intent_type type,
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struct xfs_inode *ip,
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int whichfork,
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xfs_fileoff_t startoff,
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xfs_fsblock_t startblock,
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xfs_filblks_t *blockcount,
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xfs_exntst_t state)
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{
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int error;
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error = xfs_bmap_finish_one(tp, ip, type, whichfork, startoff,
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startblock, blockcount, state);
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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 BUI and frees the BUD
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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, &budp->bud_item.li_flags);
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return error;
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}
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/* Sort bmap intents by inode. */
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static int
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xfs_bmap_update_diff_items(
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void *priv,
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struct list_head *a,
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struct list_head *b)
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{
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struct xfs_bmap_intent *ba;
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struct xfs_bmap_intent *bb;
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ba = container_of(a, struct xfs_bmap_intent, bi_list);
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bb = container_of(b, struct xfs_bmap_intent, bi_list);
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return ba->bi_owner->i_ino - bb->bi_owner->i_ino;
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}
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/* Set the map extent flags for this mapping. */
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static void
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xfs_trans_set_bmap_flags(
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struct xfs_map_extent *bmap,
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enum xfs_bmap_intent_type type,
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int whichfork,
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xfs_exntst_t state)
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{
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bmap->me_flags = 0;
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switch (type) {
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case XFS_BMAP_MAP:
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case XFS_BMAP_UNMAP:
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bmap->me_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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if (state == XFS_EXT_UNWRITTEN)
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bmap->me_flags |= XFS_BMAP_EXTENT_UNWRITTEN;
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if (whichfork == XFS_ATTR_FORK)
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bmap->me_flags |= XFS_BMAP_EXTENT_ATTR_FORK;
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}
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/* Log bmap updates in the intent item. */
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STATIC void
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xfs_bmap_update_log_item(
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struct xfs_trans *tp,
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struct xfs_bui_log_item *buip,
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struct xfs_bmap_intent *bmap)
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{
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uint next_extent;
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struct xfs_map_extent *map;
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tp->t_flags |= XFS_TRANS_DIRTY;
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set_bit(XFS_LI_DIRTY, &buip->bui_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(&buip->bui_next_extent) - 1;
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ASSERT(next_extent < buip->bui_format.bui_nextents);
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map = &buip->bui_format.bui_extents[next_extent];
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map->me_owner = bmap->bi_owner->i_ino;
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map->me_startblock = bmap->bi_bmap.br_startblock;
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map->me_startoff = bmap->bi_bmap.br_startoff;
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map->me_len = bmap->bi_bmap.br_blockcount;
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xfs_trans_set_bmap_flags(map, bmap->bi_type, bmap->bi_whichfork,
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bmap->bi_bmap.br_state);
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}
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static struct xfs_log_item *
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xfs_bmap_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_bui_log_item *buip = xfs_bui_init(mp);
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struct xfs_bmap_intent *bmap;
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ASSERT(count == XFS_BUI_MAX_FAST_EXTENTS);
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xfs_trans_add_item(tp, &buip->bui_item);
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if (sort)
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list_sort(mp, items, xfs_bmap_update_diff_items);
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list_for_each_entry(bmap, items, bi_list)
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xfs_bmap_update_log_item(tp, buip, bmap);
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return &buip->bui_item;
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}
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/* Get an BUD so we can process all the deferred rmap updates. */
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static struct xfs_log_item *
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xfs_bmap_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_bud(tp, BUI_ITEM(intent))->bud_item;
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}
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/* Process a deferred rmap update. */
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STATIC int
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xfs_bmap_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_bmap_intent *bmap;
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xfs_filblks_t count;
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int error;
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bmap = container_of(item, struct xfs_bmap_intent, bi_list);
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count = bmap->bi_bmap.br_blockcount;
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error = xfs_trans_log_finish_bmap_update(tp, BUD_ITEM(done),
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bmap->bi_type,
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bmap->bi_owner, bmap->bi_whichfork,
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bmap->bi_bmap.br_startoff,
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bmap->bi_bmap.br_startblock,
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&count,
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bmap->bi_bmap.br_state);
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if (!error && count > 0) {
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ASSERT(bmap->bi_type == XFS_BMAP_UNMAP);
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bmap->bi_bmap.br_blockcount = count;
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return -EAGAIN;
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}
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kmem_free(bmap);
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return error;
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}
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/* Abort all pending BUIs. */
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STATIC void
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xfs_bmap_update_abort_intent(
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struct xfs_log_item *intent)
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{
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xfs_bui_release(BUI_ITEM(intent));
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}
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/* Cancel a deferred rmap update. */
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STATIC void
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xfs_bmap_update_cancel_item(
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struct list_head *item)
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{
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struct xfs_bmap_intent *bmap;
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bmap = container_of(item, struct xfs_bmap_intent, bi_list);
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kmem_free(bmap);
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}
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const struct xfs_defer_op_type xfs_bmap_update_defer_type = {
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.max_items = XFS_BUI_MAX_FAST_EXTENTS,
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.create_intent = xfs_bmap_update_create_intent,
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.abort_intent = xfs_bmap_update_abort_intent,
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.create_done = xfs_bmap_update_create_done,
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.finish_item = xfs_bmap_update_finish_item,
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.cancel_item = xfs_bmap_update_cancel_item,
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};
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/*
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* Process a bmap update intent item that was recovered from the log.
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* We need to update some inode's bmbt.
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*/
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STATIC int
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xfs_bui_item_recover(
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struct xfs_log_item *lip,
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struct xfs_trans *parent_tp)
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{
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struct xfs_bmbt_irec irec;
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struct xfs_bui_log_item *buip = BUI_ITEM(lip);
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struct xfs_trans *tp;
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struct xfs_inode *ip = NULL;
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struct xfs_mount *mp = parent_tp->t_mountp;
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struct xfs_map_extent *bmap;
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struct xfs_bud_log_item *budp;
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xfs_fsblock_t startblock_fsb;
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xfs_fsblock_t inode_fsb;
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xfs_filblks_t count;
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xfs_exntst_t state;
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enum xfs_bmap_intent_type type;
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bool op_ok;
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unsigned int bui_type;
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int whichfork;
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int error = 0;
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/* Only one mapping operation per BUI... */
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if (buip->bui_format.bui_nextents != XFS_BUI_MAX_FAST_EXTENTS) {
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xfs_bui_release(buip);
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return -EFSCORRUPTED;
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}
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/*
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* First check the validity of the extent described by the
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* BUI. If anything is bad, then toss the BUI.
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*/
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bmap = &buip->bui_format.bui_extents[0];
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startblock_fsb = XFS_BB_TO_FSB(mp,
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XFS_FSB_TO_DADDR(mp, bmap->me_startblock));
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inode_fsb = XFS_BB_TO_FSB(mp, XFS_FSB_TO_DADDR(mp,
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XFS_INO_TO_FSB(mp, bmap->me_owner)));
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switch (bmap->me_flags & XFS_BMAP_EXTENT_TYPE_MASK) {
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case XFS_BMAP_MAP:
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case XFS_BMAP_UNMAP:
|
|
op_ok = true;
|
|
break;
|
|
default:
|
|
op_ok = false;
|
|
break;
|
|
}
|
|
if (!op_ok || startblock_fsb == 0 ||
|
|
bmap->me_len == 0 ||
|
|
inode_fsb == 0 ||
|
|
startblock_fsb >= mp->m_sb.sb_dblocks ||
|
|
bmap->me_len >= mp->m_sb.sb_agblocks ||
|
|
inode_fsb >= mp->m_sb.sb_dblocks ||
|
|
(bmap->me_flags & ~XFS_BMAP_EXTENT_FLAGS)) {
|
|
/*
|
|
* This will pull the BUI from the AIL and
|
|
* free the memory associated with it.
|
|
*/
|
|
xfs_bui_release(buip);
|
|
return -EFSCORRUPTED;
|
|
}
|
|
|
|
error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate,
|
|
XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK), 0, 0, &tp);
|
|
if (error)
|
|
return error;
|
|
/*
|
|
* Recovery stashes all deferred ops during intent processing and
|
|
* finishes them on completion. Transfer current dfops state to this
|
|
* transaction and transfer the result back before we return.
|
|
*/
|
|
xfs_defer_move(tp, parent_tp);
|
|
budp = xfs_trans_get_bud(tp, buip);
|
|
|
|
/* Grab the inode. */
|
|
error = xfs_iget(mp, tp, bmap->me_owner, 0, XFS_ILOCK_EXCL, &ip);
|
|
if (error)
|
|
goto err_inode;
|
|
|
|
if (VFS_I(ip)->i_nlink == 0)
|
|
xfs_iflags_set(ip, XFS_IRECOVERY);
|
|
|
|
/* Process deferred bmap item. */
|
|
state = (bmap->me_flags & XFS_BMAP_EXTENT_UNWRITTEN) ?
|
|
XFS_EXT_UNWRITTEN : XFS_EXT_NORM;
|
|
whichfork = (bmap->me_flags & XFS_BMAP_EXTENT_ATTR_FORK) ?
|
|
XFS_ATTR_FORK : XFS_DATA_FORK;
|
|
bui_type = bmap->me_flags & XFS_BMAP_EXTENT_TYPE_MASK;
|
|
switch (bui_type) {
|
|
case XFS_BMAP_MAP:
|
|
case XFS_BMAP_UNMAP:
|
|
type = bui_type;
|
|
break;
|
|
default:
|
|
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, mp);
|
|
error = -EFSCORRUPTED;
|
|
goto err_inode;
|
|
}
|
|
xfs_trans_ijoin(tp, ip, 0);
|
|
|
|
count = bmap->me_len;
|
|
error = xfs_trans_log_finish_bmap_update(tp, budp, type, ip, whichfork,
|
|
bmap->me_startoff, bmap->me_startblock, &count, state);
|
|
if (error)
|
|
goto err_inode;
|
|
|
|
if (count > 0) {
|
|
ASSERT(type == XFS_BMAP_UNMAP);
|
|
irec.br_startblock = bmap->me_startblock;
|
|
irec.br_blockcount = count;
|
|
irec.br_startoff = bmap->me_startoff;
|
|
irec.br_state = state;
|
|
xfs_bmap_unmap_extent(tp, ip, &irec);
|
|
}
|
|
|
|
xfs_defer_move(parent_tp, tp);
|
|
error = xfs_trans_commit(tp);
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
xfs_irele(ip);
|
|
|
|
return error;
|
|
|
|
err_inode:
|
|
xfs_defer_move(parent_tp, tp);
|
|
xfs_trans_cancel(tp);
|
|
if (ip) {
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
xfs_irele(ip);
|
|
}
|
|
return error;
|
|
}
|
|
|
|
STATIC bool
|
|
xfs_bui_item_match(
|
|
struct xfs_log_item *lip,
|
|
uint64_t intent_id)
|
|
{
|
|
return BUI_ITEM(lip)->bui_format.bui_id == intent_id;
|
|
}
|
|
|
|
static const struct xfs_item_ops xfs_bui_item_ops = {
|
|
.iop_size = xfs_bui_item_size,
|
|
.iop_format = xfs_bui_item_format,
|
|
.iop_unpin = xfs_bui_item_unpin,
|
|
.iop_release = xfs_bui_item_release,
|
|
.iop_recover = xfs_bui_item_recover,
|
|
.iop_match = xfs_bui_item_match,
|
|
};
|
|
|
|
/*
|
|
* Copy an BUI format buffer from the given buf, and into the destination
|
|
* BUI format structure. The BUI/BUD items were designed not to need any
|
|
* special alignment handling.
|
|
*/
|
|
static int
|
|
xfs_bui_copy_format(
|
|
struct xfs_log_iovec *buf,
|
|
struct xfs_bui_log_format *dst_bui_fmt)
|
|
{
|
|
struct xfs_bui_log_format *src_bui_fmt;
|
|
uint len;
|
|
|
|
src_bui_fmt = buf->i_addr;
|
|
len = xfs_bui_log_format_sizeof(src_bui_fmt->bui_nextents);
|
|
|
|
if (buf->i_len == len) {
|
|
memcpy(dst_bui_fmt, src_bui_fmt, len);
|
|
return 0;
|
|
}
|
|
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, NULL);
|
|
return -EFSCORRUPTED;
|
|
}
|
|
|
|
/*
|
|
* This routine is called to create an in-core extent bmap update
|
|
* item from the bui format structure which was logged on disk.
|
|
* It allocates an in-core bui, copies the extents from the format
|
|
* structure into it, and adds the bui to the AIL with the given
|
|
* LSN.
|
|
*/
|
|
STATIC int
|
|
xlog_recover_bui_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_bui_log_item *buip;
|
|
struct xfs_bui_log_format *bui_formatp;
|
|
|
|
bui_formatp = item->ri_buf[0].i_addr;
|
|
|
|
if (bui_formatp->bui_nextents != XFS_BUI_MAX_FAST_EXTENTS) {
|
|
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, log->l_mp);
|
|
return -EFSCORRUPTED;
|
|
}
|
|
buip = xfs_bui_init(mp);
|
|
error = xfs_bui_copy_format(&item->ri_buf[0], &buip->bui_format);
|
|
if (error) {
|
|
xfs_bui_item_free(buip);
|
|
return error;
|
|
}
|
|
atomic_set(&buip->bui_next_extent, bui_formatp->bui_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, &buip->bui_item, lsn);
|
|
xfs_bui_release(buip);
|
|
return 0;
|
|
}
|
|
|
|
const struct xlog_recover_item_ops xlog_bui_item_ops = {
|
|
.item_type = XFS_LI_BUI,
|
|
.commit_pass2 = xlog_recover_bui_commit_pass2,
|
|
};
|
|
|
|
/*
|
|
* This routine is called when an BUD format structure is found in a committed
|
|
* transaction in the log. Its purpose is to cancel the corresponding BUI if it
|
|
* was still in the log. To do this it searches the AIL for the BUI with an id
|
|
* equal to that in the BUD format structure. If we find it we drop the BUD
|
|
* reference, which removes the BUI from the AIL and frees it.
|
|
*/
|
|
STATIC int
|
|
xlog_recover_bud_commit_pass2(
|
|
struct xlog *log,
|
|
struct list_head *buffer_list,
|
|
struct xlog_recover_item *item,
|
|
xfs_lsn_t lsn)
|
|
{
|
|
struct xfs_bud_log_format *bud_formatp;
|
|
|
|
bud_formatp = item->ri_buf[0].i_addr;
|
|
if (item->ri_buf[0].i_len != sizeof(struct xfs_bud_log_format)) {
|
|
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, log->l_mp);
|
|
return -EFSCORRUPTED;
|
|
}
|
|
|
|
xlog_recover_release_intent(log, XFS_LI_BUI, bud_formatp->bud_bui_id);
|
|
return 0;
|
|
}
|
|
|
|
const struct xlog_recover_item_ops xlog_bud_item_ops = {
|
|
.item_type = XFS_LI_BUD,
|
|
.commit_pass2 = xlog_recover_bud_commit_pass2,
|
|
};
|