text: /*
   * Copyright (c) 2000,2005 Silicon Graphics, Inc.
   * All Rights Reserved.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License as
   * published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it would be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write the Free Software Foundation,
   * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
   */
  #include "xfs.h"
  #include "xfs_fs.h"
  #include "xfs_shared.h"
  #include "xfs_format.h"
  #include "xfs_log_format.h"
  #include "xfs_trans_resv.h"
  #include "xfs_sb.h"
  #include "xfs_ag.h"
  #include "xfs_mount.h"
  #include "xfs_inode.h"
  #include "xfs_trans.h"
  #include "xfs_trans_priv.h"
  #include "xfs_inode_item.h"
  #include "xfs_trace.h"
  
  /*
   * Add a locked inode to the transaction.
   *
   * The inode must be locked, and it cannot be associated with any transaction.
   * If lock_flags is non-zero the inode will be unlocked on transaction commit.
   */
  void
  xfs_trans_ijoin(
  	struct xfs_trans	*tp,
  	struct xfs_inode	*ip,
  	uint			lock_flags)
  {
  	xfs_inode_log_item_t	*iip;
  
  	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
  	if (ip->i_itemp == NULL)
  		xfs_inode_item_init(ip, ip->i_mount);
  	iip = ip->i_itemp;
  
  	ASSERT(iip->ili_lock_flags == 0);
  	iip->ili_lock_flags = lock_flags;
  
  	/*
  	 * Get a log_item_desc to point at the new item.
  	 */
  	xfs_trans_add_item(tp, &iip->ili_item);
  }
  
  /*
   * Transactional inode timestamp update. Requires the inode to be locked and
   * joined to the transaction supplied. Relies on the transaction subsystem to
   * track dirty state and update/writeback the inode accordingly.
   */
  void
  xfs_trans_ichgtime(
  	struct xfs_trans	*tp,
  	struct xfs_inode	*ip,
  	int			flags)
  {
  	struct inode		*inode = VFS_I(ip);
  	struct timespec		tv;
  
  	ASSERT(tp);
  	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
  
  	tv = current_fs_time(inode->i_sb);
  
  	if ((flags & XFS_ICHGTIME_MOD) &&
  	    !timespec_equal(&inode->i_mtime, &tv)) {
  		inode->i_mtime = tv;
  		ip->i_d.di_mtime.t_sec = tv.tv_sec;
  		ip->i_d.di_mtime.t_nsec = tv.tv_nsec;
  	}
  	if ((flags & XFS_ICHGTIME_CHG) &&
  	    !timespec_equal(&inode->i_ctime, &tv)) {
  		inode->i_ctime = tv;
  		ip->i_d.di_ctime.t_sec = tv.tv_sec;
  		ip->i_d.di_ctime.t_nsec = tv.tv_nsec;
  	}
  }
  
  /*
   * This is called to mark the fields indicated in fieldmask as needing
   * to be logged when the transaction is committed.  The inode must
   * already be associated with the given transaction.
   *
   * The values for fieldmask are defined in xfs_inode_item.h.  We always
   * log all of the core inode if any of it has changed, and we always log
   * all of the inline data/extents/b-tree root if any of them has changed.
   */
  void
  xfs_trans_log_inode(
  	xfs_trans_t	*tp,
  	xfs_inode_t	*ip,
  	uint		flags)
  {
  	ASSERT(ip->i_itemp != NULL);
  	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
  
  	/*
  	 * First time we log the inode in a transaction, bump the inode change
  	 * counter if it is configured for this to occur. We don't use
  	 * inode_inc_version() because there is no need for extra locking around
  	 * i_version as we already hold the inode locked exclusively for
  	 * metadata modification.
  	 */
  	if (!(ip->i_itemp->ili_item.li_desc->lid_flags & XFS_LID_DIRTY) &&
  	    IS_I_VERSION(VFS_I(ip))) {
  		ip->i_d.di_changecount = ++VFS_I(ip)->i_version;
  		flags |= XFS_ILOG_CORE;
  	}
  
  	tp->t_flags |= XFS_TRANS_DIRTY;
  	ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY;
  
  	/*
  	 * Always OR in the bits from the ili_last_fields field.
  	 * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
  	 * routines in the eventual clearing of the ili_fields bits.
  	 * See the big comment in xfs_iflush() for an explanation of
  	 * this coordination mechanism.
  	 */
  	flags |= ip->i_itemp->ili_last_fields;
  	ip->i_itemp->ili_fields |= flags;
  }
  