![Darrick J. Wong](/assets/img/avatar_default.png)
During log recovery, the per-AG reservations aren't yet set up, so log recovery has to reserve enough blocks to handle all possible btree splits. Reported-by: Dave Chinner <david@fromorbit.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
538 lines
14 KiB
C
538 lines
14 KiB
C
/*
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* Copyright (C) 2016 Oracle. All Rights Reserved.
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*
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* Author: Darrick J. Wong <darrick.wong@oracle.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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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_buf_item.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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kmem_zone_t *xfs_cui_zone;
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kmem_zone_t *xfs_cud_zone;
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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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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_zone_free(xfs_cui_zone, cuip);
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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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* Pinning has no meaning for an cui item, so just return.
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*/
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STATIC void
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xfs_cui_item_pin(
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struct xfs_log_item *lip)
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{
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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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* CUI items have no locking or pushing. However, since CUIs are pulled from
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* the AIL when their corresponding CUDs are committed to disk, their situation
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* is very similar to being pinned. Return XFS_ITEM_PINNED so that the caller
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* will eventually flush the log. This should help in getting the CUI out of
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* the AIL.
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*/
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STATIC uint
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xfs_cui_item_push(
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struct xfs_log_item *lip,
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struct list_head *buffer_list)
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{
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return XFS_ITEM_PINNED;
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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_unlock(
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struct xfs_log_item *lip)
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{
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if (lip->li_flags & XFS_LI_ABORTED)
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xfs_cui_item_free(CUI_ITEM(lip));
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}
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/*
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* The CUI is logged only once and cannot be moved in the log, so simply return
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* the lsn at which it's been logged.
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*/
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STATIC xfs_lsn_t
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xfs_cui_item_committed(
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struct xfs_log_item *lip,
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xfs_lsn_t lsn)
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{
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return lsn;
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}
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/*
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* The CUI dependency tracking op doesn't do squat. It can't because
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* it doesn't know where the free extent is coming from. The dependency
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* tracking has to be handled by the "enclosing" metadata object. For
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* example, for inodes, the inode is locked throughout the extent freeing
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* so the dependency should be recorded there.
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*/
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STATIC void
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xfs_cui_item_committing(
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struct xfs_log_item *lip,
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xfs_lsn_t lsn)
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{
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}
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/*
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* This is the ops vector shared by all cui log items.
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*/
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static const struct xfs_item_ops xfs_cui_item_ops = {
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.iop_size = xfs_cui_item_size,
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.iop_format = xfs_cui_item_format,
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.iop_pin = xfs_cui_item_pin,
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.iop_unpin = xfs_cui_item_unpin,
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.iop_unlock = xfs_cui_item_unlock,
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.iop_committed = xfs_cui_item_committed,
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.iop_push = xfs_cui_item_push,
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.iop_committing = xfs_cui_item_committing,
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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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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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KM_SLEEP);
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else
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cuip = kmem_zone_zalloc(xfs_cui_zone, KM_SLEEP);
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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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/*
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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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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_remove(&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 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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* Pinning has no meaning for an cud item, so just return.
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*/
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STATIC void
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xfs_cud_item_pin(
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struct xfs_log_item *lip)
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{
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}
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/*
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* Since pinning has no meaning for an cud item, unpinning does
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* not either.
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*/
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STATIC void
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xfs_cud_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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}
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/*
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* There isn't much you can do to push on an cud item. It is simply stuck
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* waiting for the log to be flushed to disk.
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*/
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STATIC uint
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xfs_cud_item_push(
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struct xfs_log_item *lip,
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struct list_head *buffer_list)
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{
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return XFS_ITEM_PINNED;
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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_unlock(
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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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if (lip->li_flags & XFS_LI_ABORTED) {
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xfs_cui_release(cudp->cud_cuip);
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kmem_zone_free(xfs_cud_zone, cudp);
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}
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}
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/*
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* When the cud item is committed to disk, all we need to do is delete our
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* reference to our partner cui item and then free ourselves. Since we're
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* freeing ourselves we must return -1 to keep the transaction code from
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* further referencing this item.
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*/
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STATIC xfs_lsn_t
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xfs_cud_item_committed(
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struct xfs_log_item *lip,
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xfs_lsn_t lsn)
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{
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struct xfs_cud_log_item *cudp = CUD_ITEM(lip);
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/*
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* Drop the CUI reference regardless of whether the CUD has been
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* aborted. Once the CUD transaction is constructed, it is the sole
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* responsibility of the CUD to release the CUI (even if the CUI is
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* aborted due to log I/O error).
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*/
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xfs_cui_release(cudp->cud_cuip);
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kmem_zone_free(xfs_cud_zone, cudp);
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return (xfs_lsn_t)-1;
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}
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/*
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* The CUD dependency tracking op doesn't do squat. It can't because
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* it doesn't know where the free extent is coming from. The dependency
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* tracking has to be handled by the "enclosing" metadata object. For
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* example, for inodes, the inode is locked throughout the extent freeing
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* so the dependency should be recorded there.
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*/
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STATIC void
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xfs_cud_item_committing(
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struct xfs_log_item *lip,
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xfs_lsn_t lsn)
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{
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}
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/*
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* This is the ops vector shared by all cud log items.
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*/
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static const struct xfs_item_ops xfs_cud_item_ops = {
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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_pin = xfs_cud_item_pin,
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.iop_unpin = xfs_cud_item_unpin,
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.iop_unlock = xfs_cud_item_unlock,
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.iop_committed = xfs_cud_item_committed,
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.iop_push = xfs_cud_item_push,
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.iop_committing = xfs_cud_item_committing,
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};
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/*
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* Allocate and initialize an cud item with the given number of extents.
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*/
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struct xfs_cud_log_item *
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xfs_cud_init(
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struct xfs_mount *mp,
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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_zone_zalloc(xfs_cud_zone, KM_SLEEP);
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xfs_log_item_init(mp, &cudp->cud_item, XFS_LI_CUD, &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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return cudp;
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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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int
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xfs_cui_recover(
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struct xfs_mount *mp,
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struct xfs_cui_log_item *cuip,
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struct xfs_defer_ops *dfops)
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{
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int i;
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int error = 0;
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unsigned int refc_type;
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struct xfs_phys_extent *refc;
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xfs_fsblock_t startblock_fsb;
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bool op_ok;
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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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enum xfs_refcount_intent_type type;
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xfs_fsblock_t new_fsb;
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xfs_extlen_t new_len;
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struct xfs_bmbt_irec irec;
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bool requeue_only = false;
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ASSERT(!test_bit(XFS_CUI_RECOVERED, &cuip->cui_flags));
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/*
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* First check the validity of the extents described by the
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* CUI. If any are bad, then assume that all are bad and
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* just toss the CUI.
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*/
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for (i = 0; i < cuip->cui_format.cui_nextents; i++) {
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refc = &cuip->cui_format.cui_extents[i];
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startblock_fsb = XFS_BB_TO_FSB(mp,
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XFS_FSB_TO_DADDR(mp, refc->pe_startblock));
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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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op_ok = true;
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break;
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default:
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op_ok = false;
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break;
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}
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if (!op_ok || startblock_fsb == 0 ||
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refc->pe_len == 0 ||
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startblock_fsb >= mp->m_sb.sb_dblocks ||
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refc->pe_len >= mp->m_sb.sb_agblocks ||
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(refc->pe_flags & ~XFS_REFCOUNT_EXTENT_FLAGS)) {
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/*
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* This will pull the CUI from the AIL and
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* free the memory associated with it.
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*/
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set_bit(XFS_CUI_RECOVERED, &cuip->cui_flags);
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xfs_cui_release(cuip);
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return -EIO;
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}
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}
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/*
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* Under normal operation, refcount updates are deferred, so we
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* wouldn't be adding them directly to a transaction. All
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* refcount updates manage reservation usage internally and
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* dynamically by deferring work that won't fit in the
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* transaction. Normally, any work that needs to be deferred
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* gets attached to the same defer_ops that scheduled the
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* refcount update. However, we're in log recovery here, so we
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* we use the passed in defer_ops and to finish up any work that
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* doesn't fit. We need to reserve enough blocks to handle a
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* full btree split on either end of the refcount range.
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*/
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error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate,
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mp->m_refc_maxlevels * 2, 0, XFS_TRANS_RESERVE, &tp);
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if (error)
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return error;
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cudp = xfs_trans_get_cud(tp, cuip);
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for (i = 0; i < cuip->cui_format.cui_nextents; i++) {
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refc = &cuip->cui_format.cui_extents[i];
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refc_type = refc->pe_flags & XFS_REFCOUNT_EXTENT_TYPE_MASK;
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switch (refc_type) {
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case XFS_REFCOUNT_INCREASE:
|
|
case XFS_REFCOUNT_DECREASE:
|
|
case XFS_REFCOUNT_ALLOC_COW:
|
|
case XFS_REFCOUNT_FREE_COW:
|
|
type = refc_type;
|
|
break;
|
|
default:
|
|
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,
|
|
dfops, type, refc->pe_startblock, refc->pe_len,
|
|
&new_fsb, &new_len, &rcur);
|
|
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:
|
|
error = xfs_refcount_increase_extent(
|
|
tp->t_mountp, dfops, &irec);
|
|
break;
|
|
case XFS_REFCOUNT_DECREASE:
|
|
error = xfs_refcount_decrease_extent(
|
|
tp->t_mountp, dfops, &irec);
|
|
break;
|
|
case XFS_REFCOUNT_ALLOC_COW:
|
|
error = xfs_refcount_alloc_cow_extent(
|
|
tp->t_mountp, dfops,
|
|
irec.br_startblock,
|
|
irec.br_blockcount);
|
|
break;
|
|
case XFS_REFCOUNT_FREE_COW:
|
|
error = xfs_refcount_free_cow_extent(
|
|
tp->t_mountp, dfops,
|
|
irec.br_startblock,
|
|
irec.br_blockcount);
|
|
break;
|
|
default:
|
|
ASSERT(0);
|
|
}
|
|
if (error)
|
|
goto abort_error;
|
|
requeue_only = true;
|
|
}
|
|
}
|
|
|
|
xfs_refcount_finish_one_cleanup(tp, rcur, error);
|
|
set_bit(XFS_CUI_RECOVERED, &cuip->cui_flags);
|
|
error = xfs_trans_commit(tp);
|
|
return error;
|
|
|
|
abort_error:
|
|
xfs_refcount_finish_one_cleanup(tp, rcur, error);
|
|
xfs_trans_cancel(tp);
|
|
return error;
|
|
}
|