1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
669 lines
17 KiB
C
669 lines
17 KiB
C
/*
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* Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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*
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* http://www.sgi.com
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
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*/
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/*
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* This file contains the implementation of the xfs_efi_log_item
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* and xfs_efd_log_item items.
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*/
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#include "xfs.h"
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#include "xfs_macros.h"
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#include "xfs_types.h"
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#include "xfs_inum.h"
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#include "xfs_log.h"
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#include "xfs_trans.h"
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#include "xfs_buf_item.h"
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#include "xfs_sb.h"
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#include "xfs_dir.h"
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#include "xfs_dmapi.h"
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#include "xfs_mount.h"
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#include "xfs_trans_priv.h"
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#include "xfs_extfree_item.h"
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kmem_zone_t *xfs_efi_zone;
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kmem_zone_t *xfs_efd_zone;
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STATIC void xfs_efi_item_unlock(xfs_efi_log_item_t *);
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STATIC void xfs_efi_item_abort(xfs_efi_log_item_t *);
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STATIC void xfs_efd_item_abort(xfs_efd_log_item_t *);
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/*
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* This returns the number of iovecs needed to log the given efi item.
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* We only need 1 iovec for an efi item. It just logs the efi_log_format
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* structure.
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*/
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/*ARGSUSED*/
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STATIC uint
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xfs_efi_item_size(xfs_efi_log_item_t *efip)
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{
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return 1;
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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 efi log item. We use only 1 iovec, and we point that
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* at the efi_log_format structure embedded in the efi 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 efi item have been filled.
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*/
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STATIC void
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xfs_efi_item_format(xfs_efi_log_item_t *efip,
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xfs_log_iovec_t *log_vector)
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{
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uint size;
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ASSERT(efip->efi_next_extent == efip->efi_format.efi_nextents);
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efip->efi_format.efi_type = XFS_LI_EFI;
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size = sizeof(xfs_efi_log_format_t);
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size += (efip->efi_format.efi_nextents - 1) * sizeof(xfs_extent_t);
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efip->efi_format.efi_size = 1;
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log_vector->i_addr = (xfs_caddr_t)&(efip->efi_format);
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log_vector->i_len = size;
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ASSERT(size >= sizeof(xfs_efi_log_format_t));
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}
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/*
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* Pinning has no meaning for an efi item, so just return.
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*/
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/*ARGSUSED*/
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STATIC void
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xfs_efi_item_pin(xfs_efi_log_item_t *efip)
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{
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return;
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}
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/*
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* While EFIs cannot really be pinned, the unpin operation is the
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* last place at which the EFI is manipulated during a transaction.
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* Here we coordinate with xfs_efi_cancel() to determine who gets to
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* free the EFI.
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*/
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/*ARGSUSED*/
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STATIC void
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xfs_efi_item_unpin(xfs_efi_log_item_t *efip, int stale)
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{
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int nexts;
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int size;
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xfs_mount_t *mp;
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SPLDECL(s);
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mp = efip->efi_item.li_mountp;
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AIL_LOCK(mp, s);
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if (efip->efi_flags & XFS_EFI_CANCELED) {
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/*
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* xfs_trans_delete_ail() drops the AIL lock.
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*/
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xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s);
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nexts = efip->efi_format.efi_nextents;
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if (nexts > XFS_EFI_MAX_FAST_EXTENTS) {
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size = sizeof(xfs_efi_log_item_t);
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size += (nexts - 1) * sizeof(xfs_extent_t);
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kmem_free(efip, size);
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} else {
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kmem_zone_free(xfs_efi_zone, efip);
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}
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} else {
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efip->efi_flags |= XFS_EFI_COMMITTED;
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AIL_UNLOCK(mp, s);
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}
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return;
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}
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/*
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* like unpin only we have to also clear the xaction descriptor
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* pointing the log item if we free the item. This routine duplicates
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* unpin because efi_flags is protected by the AIL lock. Freeing
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* the descriptor and then calling unpin would force us to drop the AIL
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* lock which would open up a race condition.
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*/
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STATIC void
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xfs_efi_item_unpin_remove(xfs_efi_log_item_t *efip, xfs_trans_t *tp)
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{
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int nexts;
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int size;
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xfs_mount_t *mp;
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xfs_log_item_desc_t *lidp;
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SPLDECL(s);
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mp = efip->efi_item.li_mountp;
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AIL_LOCK(mp, s);
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if (efip->efi_flags & XFS_EFI_CANCELED) {
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/*
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* free the xaction descriptor pointing to this item
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*/
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lidp = xfs_trans_find_item(tp, (xfs_log_item_t *) efip);
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xfs_trans_free_item(tp, lidp);
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/*
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* pull the item off the AIL.
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* xfs_trans_delete_ail() drops the AIL lock.
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*/
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xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s);
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/*
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* now free the item itself
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*/
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nexts = efip->efi_format.efi_nextents;
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if (nexts > XFS_EFI_MAX_FAST_EXTENTS) {
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size = sizeof(xfs_efi_log_item_t);
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size += (nexts - 1) * sizeof(xfs_extent_t);
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kmem_free(efip, size);
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} else {
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kmem_zone_free(xfs_efi_zone, efip);
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}
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} else {
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efip->efi_flags |= XFS_EFI_COMMITTED;
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AIL_UNLOCK(mp, s);
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}
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return;
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}
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/*
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* Efi items have no locking or pushing. However, since EFIs are
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* pulled from the AIL when their corresponding EFDs are committed
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* to disk, their situation is very similar to being pinned. Return
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* XFS_ITEM_PINNED so that the caller will eventually flush the log.
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* This should help in getting the EFI out of the AIL.
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*/
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/*ARGSUSED*/
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STATIC uint
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xfs_efi_item_trylock(xfs_efi_log_item_t *efip)
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{
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return XFS_ITEM_PINNED;
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}
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/*
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* Efi items have no locking, so just return.
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*/
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/*ARGSUSED*/
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STATIC void
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xfs_efi_item_unlock(xfs_efi_log_item_t *efip)
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{
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if (efip->efi_item.li_flags & XFS_LI_ABORTED)
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xfs_efi_item_abort(efip);
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return;
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}
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/*
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* The EFI is logged only once and cannot be moved in the log, so
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* simply return the lsn at which it's been logged. The canceled
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* flag is not paid any attention here. Checking for that is delayed
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* until the EFI is unpinned.
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*/
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/*ARGSUSED*/
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STATIC xfs_lsn_t
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xfs_efi_item_committed(xfs_efi_log_item_t *efip, 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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* This is called when the transaction logging the EFI is aborted.
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* Free up the EFI and return. No need to clean up the slot for
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* the item in the transaction. That was done by the unpin code
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* which is called prior to this routine in the abort/fs-shutdown path.
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*/
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STATIC void
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xfs_efi_item_abort(xfs_efi_log_item_t *efip)
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{
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int nexts;
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int size;
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nexts = efip->efi_format.efi_nextents;
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if (nexts > XFS_EFI_MAX_FAST_EXTENTS) {
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size = sizeof(xfs_efi_log_item_t);
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size += (nexts - 1) * sizeof(xfs_extent_t);
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kmem_free(efip, size);
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} else {
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kmem_zone_free(xfs_efi_zone, efip);
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}
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return;
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}
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/*
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* There isn't much you can do to push on an efi item. It is simply
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* stuck waiting for all of its corresponding efd items to be
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* committed to disk.
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*/
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/*ARGSUSED*/
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STATIC void
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xfs_efi_item_push(xfs_efi_log_item_t *efip)
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{
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return;
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}
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/*
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* The EFI 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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/*ARGSUSED*/
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STATIC void
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xfs_efi_item_committing(xfs_efi_log_item_t *efip, xfs_lsn_t lsn)
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{
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return;
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}
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/*
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* This is the ops vector shared by all efi log items.
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*/
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struct xfs_item_ops xfs_efi_item_ops = {
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.iop_size = (uint(*)(xfs_log_item_t*))xfs_efi_item_size,
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.iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
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xfs_efi_item_format,
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.iop_pin = (void(*)(xfs_log_item_t*))xfs_efi_item_pin,
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.iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_efi_item_unpin,
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.iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t *))
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xfs_efi_item_unpin_remove,
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.iop_trylock = (uint(*)(xfs_log_item_t*))xfs_efi_item_trylock,
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.iop_unlock = (void(*)(xfs_log_item_t*))xfs_efi_item_unlock,
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.iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
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xfs_efi_item_committed,
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.iop_push = (void(*)(xfs_log_item_t*))xfs_efi_item_push,
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.iop_abort = (void(*)(xfs_log_item_t*))xfs_efi_item_abort,
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.iop_pushbuf = NULL,
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.iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
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xfs_efi_item_committing
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};
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/*
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* Allocate and initialize an efi item with the given number of extents.
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*/
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xfs_efi_log_item_t *
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xfs_efi_init(xfs_mount_t *mp,
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uint nextents)
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{
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xfs_efi_log_item_t *efip;
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uint size;
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ASSERT(nextents > 0);
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if (nextents > XFS_EFI_MAX_FAST_EXTENTS) {
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size = (uint)(sizeof(xfs_efi_log_item_t) +
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((nextents - 1) * sizeof(xfs_extent_t)));
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efip = (xfs_efi_log_item_t*)kmem_zalloc(size, KM_SLEEP);
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} else {
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efip = (xfs_efi_log_item_t*)kmem_zone_zalloc(xfs_efi_zone,
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KM_SLEEP);
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}
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efip->efi_item.li_type = XFS_LI_EFI;
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efip->efi_item.li_ops = &xfs_efi_item_ops;
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efip->efi_item.li_mountp = mp;
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efip->efi_format.efi_nextents = nextents;
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efip->efi_format.efi_id = (__psint_t)(void*)efip;
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return (efip);
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}
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/*
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* This is called by the efd item code below to release references to
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* the given efi item. Each efd calls this with the number of
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* extents that it has logged, and when the sum of these reaches
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* the total number of extents logged by this efi item we can free
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* the efi item.
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*
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* Freeing the efi item requires that we remove it from the AIL.
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* We'll use the AIL lock to protect our counters as well as
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* the removal from the AIL.
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*/
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void
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xfs_efi_release(xfs_efi_log_item_t *efip,
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uint nextents)
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{
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xfs_mount_t *mp;
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int extents_left;
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uint size;
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int nexts;
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SPLDECL(s);
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mp = efip->efi_item.li_mountp;
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ASSERT(efip->efi_next_extent > 0);
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ASSERT(efip->efi_flags & XFS_EFI_COMMITTED);
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AIL_LOCK(mp, s);
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ASSERT(efip->efi_next_extent >= nextents);
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efip->efi_next_extent -= nextents;
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extents_left = efip->efi_next_extent;
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if (extents_left == 0) {
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/*
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* xfs_trans_delete_ail() drops the AIL lock.
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*/
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xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s);
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} else {
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AIL_UNLOCK(mp, s);
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}
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if (extents_left == 0) {
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nexts = efip->efi_format.efi_nextents;
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if (nexts > XFS_EFI_MAX_FAST_EXTENTS) {
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size = sizeof(xfs_efi_log_item_t);
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size += (nexts - 1) * sizeof(xfs_extent_t);
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kmem_free(efip, size);
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} else {
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kmem_zone_free(xfs_efi_zone, efip);
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}
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}
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}
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/*
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* This is called when the transaction that should be committing the
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* EFD corresponding to the given EFI is aborted. The committed and
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* canceled flags are used to coordinate the freeing of the EFI and
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* the references by the transaction that committed it.
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*/
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STATIC void
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xfs_efi_cancel(
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xfs_efi_log_item_t *efip)
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{
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int nexts;
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int size;
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xfs_mount_t *mp;
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SPLDECL(s);
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mp = efip->efi_item.li_mountp;
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AIL_LOCK(mp, s);
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if (efip->efi_flags & XFS_EFI_COMMITTED) {
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/*
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* xfs_trans_delete_ail() drops the AIL lock.
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*/
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xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s);
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nexts = efip->efi_format.efi_nextents;
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if (nexts > XFS_EFI_MAX_FAST_EXTENTS) {
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size = sizeof(xfs_efi_log_item_t);
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size += (nexts - 1) * sizeof(xfs_extent_t);
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kmem_free(efip, size);
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} else {
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kmem_zone_free(xfs_efi_zone, efip);
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}
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} else {
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efip->efi_flags |= XFS_EFI_CANCELED;
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AIL_UNLOCK(mp, s);
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}
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return;
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}
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|
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/*
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* This returns the number of iovecs needed to log the given efd item.
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* We only need 1 iovec for an efd item. It just logs the efd_log_format
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* structure.
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*/
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/*ARGSUSED*/
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STATIC uint
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xfs_efd_item_size(xfs_efd_log_item_t *efdp)
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{
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return 1;
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}
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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 efd log item. We use only 1 iovec, and we point that
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* at the efd_log_format structure embedded in the efd 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 efd item have been filled.
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*/
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STATIC void
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xfs_efd_item_format(xfs_efd_log_item_t *efdp,
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xfs_log_iovec_t *log_vector)
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{
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uint size;
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ASSERT(efdp->efd_next_extent == efdp->efd_format.efd_nextents);
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efdp->efd_format.efd_type = XFS_LI_EFD;
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size = sizeof(xfs_efd_log_format_t);
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size += (efdp->efd_format.efd_nextents - 1) * sizeof(xfs_extent_t);
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efdp->efd_format.efd_size = 1;
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log_vector->i_addr = (xfs_caddr_t)&(efdp->efd_format);
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log_vector->i_len = size;
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ASSERT(size >= sizeof(xfs_efd_log_format_t));
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}
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/*
|
|
* Pinning has no meaning for an efd item, so just return.
|
|
*/
|
|
/*ARGSUSED*/
|
|
STATIC void
|
|
xfs_efd_item_pin(xfs_efd_log_item_t *efdp)
|
|
{
|
|
return;
|
|
}
|
|
|
|
|
|
/*
|
|
* Since pinning has no meaning for an efd item, unpinning does
|
|
* not either.
|
|
*/
|
|
/*ARGSUSED*/
|
|
STATIC void
|
|
xfs_efd_item_unpin(xfs_efd_log_item_t *efdp, int stale)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
STATIC void
|
|
xfs_efd_item_unpin_remove(xfs_efd_log_item_t *efdp, xfs_trans_t *tp)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Efd items have no locking, so just return success.
|
|
*/
|
|
/*ARGSUSED*/
|
|
STATIC uint
|
|
xfs_efd_item_trylock(xfs_efd_log_item_t *efdp)
|
|
{
|
|
return XFS_ITEM_LOCKED;
|
|
}
|
|
|
|
/*
|
|
* Efd items have no locking or pushing, so return failure
|
|
* so that the caller doesn't bother with us.
|
|
*/
|
|
/*ARGSUSED*/
|
|
STATIC void
|
|
xfs_efd_item_unlock(xfs_efd_log_item_t *efdp)
|
|
{
|
|
if (efdp->efd_item.li_flags & XFS_LI_ABORTED)
|
|
xfs_efd_item_abort(efdp);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* When the efd item is committed to disk, all we need to do
|
|
* is delete our reference to our partner efi item and then
|
|
* free ourselves. Since we're freeing ourselves we must
|
|
* return -1 to keep the transaction code from further referencing
|
|
* this item.
|
|
*/
|
|
/*ARGSUSED*/
|
|
STATIC xfs_lsn_t
|
|
xfs_efd_item_committed(xfs_efd_log_item_t *efdp, xfs_lsn_t lsn)
|
|
{
|
|
uint size;
|
|
int nexts;
|
|
|
|
/*
|
|
* If we got a log I/O error, it's always the case that the LR with the
|
|
* EFI got unpinned and freed before the EFD got aborted.
|
|
*/
|
|
if ((efdp->efd_item.li_flags & XFS_LI_ABORTED) == 0)
|
|
xfs_efi_release(efdp->efd_efip, efdp->efd_format.efd_nextents);
|
|
|
|
nexts = efdp->efd_format.efd_nextents;
|
|
if (nexts > XFS_EFD_MAX_FAST_EXTENTS) {
|
|
size = sizeof(xfs_efd_log_item_t);
|
|
size += (nexts - 1) * sizeof(xfs_extent_t);
|
|
kmem_free(efdp, size);
|
|
} else {
|
|
kmem_zone_free(xfs_efd_zone, efdp);
|
|
}
|
|
|
|
return (xfs_lsn_t)-1;
|
|
}
|
|
|
|
/*
|
|
* The transaction of which this EFD is a part has been aborted.
|
|
* Inform its companion EFI of this fact and then clean up after
|
|
* ourselves. No need to clean up the slot for the item in the
|
|
* transaction. That was done by the unpin code which is called
|
|
* prior to this routine in the abort/fs-shutdown path.
|
|
*/
|
|
STATIC void
|
|
xfs_efd_item_abort(xfs_efd_log_item_t *efdp)
|
|
{
|
|
int nexts;
|
|
int size;
|
|
|
|
/*
|
|
* If we got a log I/O error, it's always the case that the LR with the
|
|
* EFI got unpinned and freed before the EFD got aborted. So don't
|
|
* reference the EFI at all in that case.
|
|
*/
|
|
if ((efdp->efd_item.li_flags & XFS_LI_ABORTED) == 0)
|
|
xfs_efi_cancel(efdp->efd_efip);
|
|
|
|
nexts = efdp->efd_format.efd_nextents;
|
|
if (nexts > XFS_EFD_MAX_FAST_EXTENTS) {
|
|
size = sizeof(xfs_efd_log_item_t);
|
|
size += (nexts - 1) * sizeof(xfs_extent_t);
|
|
kmem_free(efdp, size);
|
|
} else {
|
|
kmem_zone_free(xfs_efd_zone, efdp);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* There isn't much you can do to push on an efd item. It is simply
|
|
* stuck waiting for the log to be flushed to disk.
|
|
*/
|
|
/*ARGSUSED*/
|
|
STATIC void
|
|
xfs_efd_item_push(xfs_efd_log_item_t *efdp)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* The EFD dependency tracking op doesn't do squat. It can't because
|
|
* it doesn't know where the free extent is coming from. The dependency
|
|
* tracking has to be handled by the "enclosing" metadata object. For
|
|
* example, for inodes, the inode is locked throughout the extent freeing
|
|
* so the dependency should be recorded there.
|
|
*/
|
|
/*ARGSUSED*/
|
|
STATIC void
|
|
xfs_efd_item_committing(xfs_efd_log_item_t *efip, xfs_lsn_t lsn)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* This is the ops vector shared by all efd log items.
|
|
*/
|
|
struct xfs_item_ops xfs_efd_item_ops = {
|
|
.iop_size = (uint(*)(xfs_log_item_t*))xfs_efd_item_size,
|
|
.iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
|
|
xfs_efd_item_format,
|
|
.iop_pin = (void(*)(xfs_log_item_t*))xfs_efd_item_pin,
|
|
.iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_efd_item_unpin,
|
|
.iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*))
|
|
xfs_efd_item_unpin_remove,
|
|
.iop_trylock = (uint(*)(xfs_log_item_t*))xfs_efd_item_trylock,
|
|
.iop_unlock = (void(*)(xfs_log_item_t*))xfs_efd_item_unlock,
|
|
.iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
|
|
xfs_efd_item_committed,
|
|
.iop_push = (void(*)(xfs_log_item_t*))xfs_efd_item_push,
|
|
.iop_abort = (void(*)(xfs_log_item_t*))xfs_efd_item_abort,
|
|
.iop_pushbuf = NULL,
|
|
.iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
|
|
xfs_efd_item_committing
|
|
};
|
|
|
|
|
|
/*
|
|
* Allocate and initialize an efd item with the given number of extents.
|
|
*/
|
|
xfs_efd_log_item_t *
|
|
xfs_efd_init(xfs_mount_t *mp,
|
|
xfs_efi_log_item_t *efip,
|
|
uint nextents)
|
|
|
|
{
|
|
xfs_efd_log_item_t *efdp;
|
|
uint size;
|
|
|
|
ASSERT(nextents > 0);
|
|
if (nextents > XFS_EFD_MAX_FAST_EXTENTS) {
|
|
size = (uint)(sizeof(xfs_efd_log_item_t) +
|
|
((nextents - 1) * sizeof(xfs_extent_t)));
|
|
efdp = (xfs_efd_log_item_t*)kmem_zalloc(size, KM_SLEEP);
|
|
} else {
|
|
efdp = (xfs_efd_log_item_t*)kmem_zone_zalloc(xfs_efd_zone,
|
|
KM_SLEEP);
|
|
}
|
|
|
|
efdp->efd_item.li_type = XFS_LI_EFD;
|
|
efdp->efd_item.li_ops = &xfs_efd_item_ops;
|
|
efdp->efd_item.li_mountp = mp;
|
|
efdp->efd_efip = efip;
|
|
efdp->efd_format.efd_nextents = nextents;
|
|
efdp->efd_format.efd_efi_id = efip->efi_format.efi_id;
|
|
|
|
return (efdp);
|
|
}
|