151 строка
4.2 KiB
C
151 строка
4.2 KiB
C
/*
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* Copyright (c) 2000,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* 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 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,
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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_shared.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_mount.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_inode_item.h"
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#include "xfs_trace.h"
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/*
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* Add a locked inode to the transaction.
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*
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* The inode must be locked, and it cannot be associated with any transaction.
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* If lock_flags is non-zero the inode will be unlocked on transaction commit.
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*/
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void
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xfs_trans_ijoin(
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struct xfs_trans *tp,
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struct xfs_inode *ip,
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uint lock_flags)
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{
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xfs_inode_log_item_t *iip;
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ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
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if (ip->i_itemp == NULL)
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xfs_inode_item_init(ip, ip->i_mount);
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iip = ip->i_itemp;
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ASSERT(iip->ili_lock_flags == 0);
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iip->ili_lock_flags = lock_flags;
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/*
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* Get a log_item_desc to point at the new item.
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*/
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xfs_trans_add_item(tp, &iip->ili_item);
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}
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/*
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* Transactional inode timestamp update. Requires the inode to be locked and
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* joined to the transaction supplied. Relies on the transaction subsystem to
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* track dirty state and update/writeback the inode accordingly.
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*/
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void
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xfs_trans_ichgtime(
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struct xfs_trans *tp,
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struct xfs_inode *ip,
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int flags)
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{
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struct inode *inode = VFS_I(ip);
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struct timespec tv;
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ASSERT(tp);
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ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
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tv = current_time(inode);
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if (flags & XFS_ICHGTIME_MOD)
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inode->i_mtime = tv;
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if (flags & XFS_ICHGTIME_CHG)
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inode->i_ctime = tv;
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}
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/*
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* This is called to mark the fields indicated in fieldmask as needing
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* to be logged when the transaction is committed. The inode must
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* already be associated with the given transaction.
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*
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* The values for fieldmask are defined in xfs_inode_item.h. We always
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* log all of the core inode if any of it has changed, and we always log
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* all of the inline data/extents/b-tree root if any of them has changed.
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*/
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void
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xfs_trans_log_inode(
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xfs_trans_t *tp,
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xfs_inode_t *ip,
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uint flags)
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{
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ASSERT(ip->i_itemp != NULL);
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ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
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/*
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* Record the specific change for fdatasync optimisation. This
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* allows fdatasync to skip log forces for inodes that are only
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* timestamp dirty. We do this before the change count so that
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* the core being logged in this case does not impact on fdatasync
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* behaviour.
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*/
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ip->i_itemp->ili_fsync_fields |= flags;
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/*
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* First time we log the inode in a transaction, bump the inode change
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* counter if it is configured for this to occur. We don't use
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* inode_inc_version() because there is no need for extra locking around
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* i_version as we already hold the inode locked exclusively for
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* metadata modification.
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*/
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if (!(ip->i_itemp->ili_item.li_desc->lid_flags & XFS_LID_DIRTY) &&
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IS_I_VERSION(VFS_I(ip))) {
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VFS_I(ip)->i_version++;
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flags |= XFS_ILOG_CORE;
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}
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tp->t_flags |= XFS_TRANS_DIRTY;
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ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY;
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/*
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* Always OR in the bits from the ili_last_fields field.
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* This is to coordinate with the xfs_iflush() and xfs_iflush_done()
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* routines in the eventual clearing of the ili_fields bits.
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* See the big comment in xfs_iflush() for an explanation of
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* this coordination mechanism.
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*/
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flags |= ip->i_itemp->ili_last_fields;
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ip->i_itemp->ili_fields |= flags;
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}
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int
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xfs_trans_roll_inode(
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struct xfs_trans **tpp,
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struct xfs_inode *ip)
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{
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int error;
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xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE);
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error = xfs_trans_roll(tpp);
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if (!error)
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xfs_trans_ijoin(*tpp, ip, 0);
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return error;
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}
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