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/*
 * Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 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.
 *
 * Further, this software is distributed without any warranty that it is
 * free of the rightful claim of any third person regarding infringement
 * or the like.	 Any license provided herein, whether implied or
 * otherwise, applies only to this software file.  Patent licenses, if
 * any, provided herein do not apply to combinations of this program with
 * other software, or any other product whatsoever.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 * Mountain View, CA  94043, or:
 *
 * http://www.sgi.com
 *
 * For further information regarding this notice, see:
 *
 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
 */

#include <xfs.h>

/*
 * Simple transaction interface
 */

xfs_trans_t *
libxfs_trans_alloc(xfs_mount_t *mp, int type)
{
	xfs_trans_t	*ptr;

	if ((ptr = calloc(sizeof(xfs_trans_t), 1)) == NULL) {
		fprintf(stderr, "%s: xact calloc failed (%d bytes): %s\n",
			progname, (int)sizeof(xfs_trans_t), strerror(errno));
		exit(1);
	}
	ptr->t_mountp = mp;
	ptr->t_type = type;
	ptr->t_items_free = XFS_LIC_NUM_SLOTS;
	XFS_LIC_INIT(&(ptr->t_items));
#ifdef XACT_DEBUG
	fprintf(stderr, "allocated new transaction %p\n", ptr);
#endif
	return ptr;
}

xfs_trans_t *
libxfs_trans_dup(xfs_trans_t *tp)
{
	xfs_trans_t *ptr;

	ptr = libxfs_trans_alloc(tp->t_mountp, tp->t_type);
#ifdef XACT_DEBUG
	fprintf(stderr, "duplicated transaction %p (new=%p)\n", tp, ptr);
#endif
	return ptr;
}

int
libxfs_trans_reserve(xfs_trans_t *tp,
	uint blocks, uint logspace, uint rtextents, uint flags, uint logcount)
{
	xfs_sb_t	*mpsb = &tp->t_mountp->m_sb;

	/*
	 * Attempt to reserve the needed disk blocks by decrementing
	 * the number needed from the number available.	 This will
	 * fail if the count would go below zero.
	 */
	if (blocks > 0) {
		if (mpsb->sb_fdblocks < blocks)
			return ENOSPC;
	}
	/* user space, don't need log/RT stuff (preserve the API though) */
	return 0;
}

void
libxfs_trans_cancel(xfs_trans_t *tp, int flags)
{
#ifdef XACT_DEBUG
	xfs_trans_t *otp = tp;
#endif
	if (tp != NULL) {
		xfs_trans_free_items(tp, flags);
		free(tp);
		tp = NULL;
	}
#ifdef XACT_DEBUG
	fprintf(stderr, "## cancelled transaction %p\n", otp);
#endif
}

int
libxfs_trans_iget(xfs_mount_t *mp, xfs_trans_t *tp, xfs_ino_t ino,
		uint lock_flags, xfs_inode_t **ipp)
{
	int			error;
	xfs_inode_t		*ip;
	xfs_inode_log_item_t	*iip;

	if (tp == NULL)
		return libxfs_iread(mp, tp, ino, ipp, 0);

	error = libxfs_iread(mp, tp, ino, &ip, 0);
	if (error)
		return error;
	ASSERT(ip != NULL);

	if (ip->i_itemp == NULL)
		xfs_inode_item_init(ip, mp);
	iip = ip->i_itemp;
	xfs_trans_add_item(tp, (xfs_log_item_t *)(iip));

	/* initialize i_transp so we can find it incore */
	ip->i_transp = tp;

	*ipp = ip;
	return 0;
}

void
libxfs_trans_iput(xfs_trans_t *tp, xfs_inode_t *ip, uint lock_flags)
{
	xfs_inode_log_item_t	*iip;
	xfs_log_item_desc_t	*lidp;

	if (tp == NULL) {
		libxfs_iput(ip, lock_flags);
		return;
	}

	ASSERT(ip->i_transp == tp);
	iip = ip->i_itemp;
	ASSERT(iip != NULL);

	lidp = xfs_trans_find_item(tp, (xfs_log_item_t *)iip);
	ASSERT(lidp != NULL);
	ASSERT(lidp->lid_item == (xfs_log_item_t *)iip);
	ASSERT(!(lidp->lid_flags & XFS_LID_DIRTY));
	xfs_trans_free_item(tp, lidp);

	libxfs_iput(ip, lock_flags);
}

void
libxfs_trans_ijoin(xfs_trans_t *tp, xfs_inode_t *ip, uint lock_flags)
{
	xfs_inode_log_item_t	*iip;

	ASSERT(ip->i_transp == NULL);
	if (ip->i_itemp == NULL)
		xfs_inode_item_init(ip, ip->i_mount);
	iip = ip->i_itemp;
	ASSERT(iip->ili_flags == 0);
	ASSERT(iip->ili_inode != NULL);

	xfs_trans_add_item(tp, (xfs_log_item_t *)(iip));

	ip->i_transp = tp;
#ifdef XACT_DEBUG
	fprintf(stderr, "ijoin'd inode %llu, transaction %p\n", ip->i_ino, tp);
#endif
}

void
libxfs_trans_ihold(xfs_trans_t *tp, xfs_inode_t *ip)
{
	ASSERT(ip->i_transp == tp);
	ASSERT(ip->i_itemp != NULL);

	ip->i_itemp->ili_flags |= XFS_ILI_HOLD;
#ifdef XACT_DEBUG
	fprintf(stderr, "ihold'd inode %llu, transaction %p\n", ip->i_ino, tp);
#endif
}

void
libxfs_trans_inode_alloc_buf(xfs_trans_t *tp, xfs_buf_t *bp)
{
	xfs_buf_log_item_t	*bip;

	ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
	ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
	bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
	bip->bli_flags |= XFS_BLI_INODE_ALLOC_BUF;
}

/*
 * 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)
{
	xfs_log_item_desc_t	*lidp;

	ASSERT(ip->i_transp == tp);
	ASSERT(ip->i_itemp != NULL);
#ifdef XACT_DEBUG
	fprintf(stderr, "dirtied inode %llu, transaction %p\n", ip->i_ino, tp);
#endif

	lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)(ip->i_itemp));
	ASSERT(lidp != NULL);

	tp->t_flags |= XFS_TRANS_DIRTY;
	lidp->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 ilf_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_format.ilf_fields |= flags;
}

/*
 * This is called to mark bytes first through last inclusive of the given
 * buffer as needing to be logged when the transaction is committed.
 * The buffer must already be associated with the given transaction.
 *
 * First and last are numbers relative to the beginning of this buffer,
 * so the first byte in the buffer is numbered 0 regardless of the
 * value of b_blkno.
 */
void
libxfs_trans_log_buf(xfs_trans_t *tp, xfs_buf_t *bp, uint first, uint last)
{
	xfs_buf_log_item_t	*bip;
	xfs_log_item_desc_t	*lidp;

	ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
	ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
	ASSERT((first <= last) && (last < XFS_BUF_COUNT(bp)));
#ifdef XACT_DEBUG
	fprintf(stderr, "dirtied buffer %p, transaction %p\n", bp, tp);
#endif

	bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);

	lidp = xfs_trans_find_item(tp, (xfs_log_item_t *)bip);
	ASSERT(lidp != NULL);

	tp->t_flags |= XFS_TRANS_DIRTY;
	lidp->lid_flags |= XFS_LID_DIRTY;
	xfs_buf_item_log(bip, first, last);
}

void
libxfs_trans_brelse(xfs_trans_t *tp, xfs_buf_t *bp)
{
	xfs_buf_log_item_t	*bip;
	xfs_log_item_desc_t	*lidp;
#ifdef XACT_DEBUG
	fprintf(stderr, "released buffer %p, transaction %p\n", bp, tp);
#endif

	if (tp == NULL) {
		ASSERT(XFS_BUF_FSPRIVATE2(bp, void *) == NULL);
		libxfs_putbuf(bp);
		return;
	}
	ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
	bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
	ASSERT(bip->bli_item.li_type == XFS_LI_BUF);
	lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)bip);
	ASSERT(lidp != NULL);
	if (bip->bli_recur > 0) {
		bip->bli_recur--;
		return;
	}
	/* If dirty, can't release till transaction committed */
	if (lidp->lid_flags & XFS_LID_DIRTY) {
		return;
	}
	xfs_trans_free_item(tp, lidp);
	if (bip->bli_flags & XFS_BLI_HOLD) {
		bip->bli_flags &= ~XFS_BLI_HOLD;
	}
	XFS_BUF_SET_FSPRIVATE2(bp, NULL);
	libxfs_putbuf(bp);
}

void
libxfs_trans_binval(xfs_trans_t *tp, xfs_buf_t *bp)
{
	xfs_log_item_desc_t	*lidp;
	xfs_buf_log_item_t	*bip;
#ifdef XACT_DEBUG
	fprintf(stderr, "binval'd buffer %p, transaction %p\n", bp, tp);
#endif

	ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
	ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);

	bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
	lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)bip);
	ASSERT(lidp != NULL);
	bip->bli_flags &= ~(XFS_BLI_DIRTY);
	bip->bli_format.blf_flags &= ~XFS_BLI_INODE_BUF;
	bip->bli_format.blf_flags |= XFS_BLI_CANCEL;
	lidp->lid_flags |= XFS_LID_DIRTY;
	tp->t_flags |= XFS_TRANS_DIRTY;
}

void
libxfs_trans_bjoin(xfs_trans_t *tp, xfs_buf_t *bp)
{
	xfs_buf_log_item_t	*bip;

	ASSERT(XFS_BUF_FSPRIVATE2(bp, void *) == NULL);
#ifdef XACT_DEBUG
	fprintf(stderr, "bjoin'd buffer %p, transaction %p\n", bp, tp);
#endif

	xfs_buf_item_init(bp, tp->t_mountp);
	bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
	xfs_trans_add_item(tp, (xfs_log_item_t *)bip);
	XFS_BUF_SET_FSPRIVATE2(bp, tp);
}

void
libxfs_trans_bhold(xfs_trans_t *tp, xfs_buf_t *bp)
{
	xfs_buf_log_item_t	*bip;

	ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
	ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
#ifdef XACT_DEBUG
	fprintf(stderr, "bhold'd buffer %p, transaction %p\n", bp, tp);
#endif

	bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
	bip->bli_flags |= XFS_BLI_HOLD;
}

xfs_buf_t *
libxfs_trans_get_buf(xfs_trans_t *tp, dev_t dev, xfs_daddr_t d, int len, uint f)
{
	xfs_buf_t		*bp;
	xfs_buf_log_item_t	*bip;
	buftarg_t		bdev = { dev };

	if (tp == NULL)
		return libxfs_getbuf(dev, d, len);

	if (tp->t_items.lic_next == NULL)
		bp = xfs_trans_buf_item_match(tp, &bdev, d, len);
	else
		bp = xfs_trans_buf_item_match_all(tp, &bdev, d, len);
	if (bp != NULL) {
		ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
		bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
		ASSERT(bip != NULL);
		bip->bli_recur++;
		return bp;
	}

	bp = libxfs_getbuf(dev, d, len);
	if (bp == NULL)
		return NULL;
#ifdef XACT_DEBUG
	fprintf(stderr, "trans_get_buf buffer %p, transaction %p\n", bp, tp);
#endif

	xfs_buf_item_init(bp, tp->t_mountp);
	bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t*);
	bip->bli_recur = 0;
	xfs_trans_add_item(tp, (xfs_log_item_t *)bip);

	/* initialize b_fsprivate2 so we can find it incore */
	XFS_BUF_SET_FSPRIVATE2(bp, tp);
	return bp;
}

int
libxfs_trans_read_buf(xfs_mount_t *mp, xfs_trans_t *tp, dev_t dev,
			xfs_daddr_t blkno, int len, uint f, xfs_buf_t **bpp)
{
	xfs_buf_t		*bp;
	xfs_buf_log_item_t	*bip;
	int			error;
	buftarg_t		bdev = { dev };

	if (tp == NULL) {
		bp = libxfs_getbuf(mp->m_dev, blkno, len);
		error = libxfs_readbufr(dev, blkno, bp, len, 0);
		*bpp = bp;
		return error;
	}

	if (tp->t_items.lic_next == NULL)
		bp = xfs_trans_buf_item_match(tp, &bdev, blkno, len);
	else
		bp = xfs_trans_buf_item_match_all(tp, &bdev, blkno, len);
	if (bp != NULL) {
		ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
		ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
		bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t*);
		bip->bli_recur++;
		*bpp = bp;
		return 0;
	}

	bp = libxfs_getbuf(mp->m_dev, blkno, len);
	error = libxfs_readbufr(dev, blkno, bp, len, 0);
	if (error) {
		*bpp = NULL;
		return error;
	}
#ifdef XACT_DEBUG
	fprintf(stderr, "trans_read_buf buffer %p, transaction %p\n", bp, tp);
#endif

	xfs_buf_item_init(bp, tp->t_mountp);
	bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
	bip->bli_recur = 0;
	xfs_trans_add_item(tp, (xfs_log_item_t *)bip);

	/* initialise b_fsprivate2 so we can find it incore */
	XFS_BUF_SET_FSPRIVATE2(bp, tp);
	*bpp = bp;
	return 0;
}

/*
 * Record the indicated change to the given field for application
 * to the file system's superblock when the transaction commits.
 * For now, just store the change in the transaction structure.
 * Mark the transaction structure to indicate that the superblock
 * needs to be updated before committing.
 *
 * Originally derived from xfs_trans_mod_sb().
 */
void
libxfs_trans_mod_sb(xfs_trans_t *tp, uint field, long delta)
{
	switch (field) {
	case XFS_TRANS_SB_RES_FDBLOCKS:
		return;
	case XFS_TRANS_SB_FDBLOCKS:
		tp->t_fdblocks_delta += delta;
		break;
	case XFS_TRANS_SB_ICOUNT:
		ASSERT(delta > 0);
		tp->t_icount_delta += delta;
		break;
	case XFS_TRANS_SB_IFREE:
		tp->t_ifree_delta += delta;
		break;
	case XFS_TRANS_SB_FREXTENTS:
		tp->t_frextents_delta += delta;
		break;
	default:
		ASSERT(0);
		return;
	}
	tp->t_flags |= (XFS_TRANS_SB_DIRTY | XFS_TRANS_DIRTY);
}


/*
 * Transaction commital code follows (i.e. write to disk in libxfs)
 */

STATIC void
inode_item_done(xfs_inode_log_item_t *iip)
{
	xfs_dinode_t	*dip;
	xfs_inode_t	*ip;
	xfs_mount_t	*mp;
	xfs_buf_t	*bp;
	int		hold;
	int		error;
	extern xfs_zone_t *xfs_ili_zone;

	ip = iip->ili_inode;
	mp = iip->ili_item.li_mountp;
	hold = iip->ili_flags & XFS_ILI_HOLD;
	ASSERT(ip != NULL);

	if (!(iip->ili_format.ilf_fields & XFS_ILOG_ALL)) {
		ip->i_transp = NULL;	/* disassociate from transaction */
		iip->ili_flags = 0;	/* reset all flags */
		if (!hold)
			goto ili_done;
		return;
	}

	/*
	 * Get the buffer containing the on-disk inode.
	 */
	error = libxfs_itobp(mp, NULL, ip, &dip, &bp, 0);
	if (error) {
		fprintf(stderr, "%s: warning - itobp failed (%d)\n",
			progname, error);
		goto ili_done;
	}

	XFS_BUF_SET_FSPRIVATE(bp, iip);
	error = libxfs_iflush_int(ip, bp);
	if (error) {
		fprintf(stderr, "%s: warning - iflush_int failed (%d)\n",
			progname, error);
		goto ili_done;
	}

	ip->i_transp = NULL;	/* disassociate from transaction */
	XFS_BUF_SET_FSPRIVATE(bp, NULL);	/* remove log item */
	XFS_BUF_SET_FSPRIVATE2(bp, NULL);	/* remove xact ptr */
	libxfs_writebuf_int(bp, 0);
#ifdef XACT_DEBUG
	fprintf(stderr, "flushing dirty inode %llu, buffer %p (hold=%u)\n",
			ip->i_ino, bp, hold);
#endif
	if (hold) {
		iip->ili_flags &= ~XFS_ILI_HOLD;
		return;
	}
	else {
		/*libxfs_iput(iip->ili_inode, 0);	- nathans TODO? */
		libxfs_putbuf(bp);
	}

ili_done:
	if (ip->i_itemp)
		kmem_zone_free(xfs_ili_zone, ip->i_itemp);
	else
		ASSERT(0);
	ip->i_itemp = NULL;
}

STATIC void
buf_item_done(xfs_buf_log_item_t *bip)
{
	extern xfs_zone_t *xfs_buf_item_zone;
	xfs_buf_t	*bp;
	int		hold;

	bp = bip->bli_buf;
	ASSERT(bp != NULL);
	XFS_BUF_SET_FSPRIVATE(bp, NULL);	/* remove log item */
	XFS_BUF_SET_FSPRIVATE2(bp, NULL);	/* remove xact ptr */

	hold = (bip->bli_flags & XFS_BLI_HOLD);
	if (bip->bli_flags & XFS_BLI_DIRTY) {
#ifdef XACT_DEBUG
		fprintf(stderr, "flushing dirty buffer %p (hold=%d)\n",
			bp, hold);
#endif
		libxfs_writebuf_int(bp, 0);
		if (hold)
			bip->bli_flags &= ~XFS_BLI_HOLD;
		else
			libxfs_putbuf(bp);
	}
	/* release the buf item */
	kmem_zone_free(xfs_buf_item_zone, bip);
}

/*
 * This is called to perform the commit processing for each
 * item described by the given chunk.
 */
static void
trans_chunk_committed(xfs_log_item_chunk_t *licp)
{
	xfs_log_item_desc_t	*lidp;
	xfs_log_item_t		*lip;
	int			i;

	lidp = licp->lic_descs;
	for (i = 0; i < licp->lic_unused; i++, lidp++) {
		if (XFS_LIC_ISFREE(licp, i))
			continue;
		lip = lidp->lid_item;
		if (lip->li_type == XFS_LI_BUF)
			buf_item_done((xfs_buf_log_item_t *)lidp->lid_item);
		else if (lip->li_type == XFS_LI_INODE)
			inode_item_done((xfs_inode_log_item_t *)lidp->lid_item);
		else {
			fprintf(stderr, "%s: unrecognised log item type\n",
				progname);
			ASSERT(0);
		}
	}
}

/*
 * Calls trans_chunk_committed() to process the items in each chunk.
 */
static void
trans_committed(xfs_trans_t *tp)
{
	xfs_log_item_chunk_t	*licp;
	xfs_log_item_chunk_t	*next_licp;

	/*
	 * Special case the chunk embedded in the transaction.
	 */
	licp = &(tp->t_items);
	if (!(XFS_LIC_ARE_ALL_FREE(licp))) {
		trans_chunk_committed(licp);
	}

	/*
	 * Process the items in each chunk in turn.
	 */
	licp = licp->lic_next;
	while (licp != NULL) {
		trans_chunk_committed(licp);
		next_licp = licp->lic_next;
		kmem_free(licp, sizeof(xfs_log_item_chunk_t));
		licp = next_licp;
	}
}

/*
 * Unlock each item pointed to by a descriptor in the given chunk.
 * Free descriptors pointing to items which are not dirty if freeing_chunk
 * is zero. If freeing_chunk is non-zero, then we need to unlock all
 * items in the chunk.	Return the number of descriptors freed.
 * Originally based on xfs_trans_unlock_chunk() - adapted for libxfs
 * transactions though.
 */
int
xfs_trans_unlock_chunk(
	xfs_log_item_chunk_t	*licp,
	int			freeing_chunk,
	int			abort,
	xfs_lsn_t		commit_lsn)	/* nb: unused */
{
	xfs_log_item_desc_t	*lidp;
	xfs_log_item_t		*lip;
	int			i;
	int			freed;

	freed = 0;
	lidp = licp->lic_descs;
	for (i = 0; i < licp->lic_unused; i++, lidp++) {
		if (XFS_LIC_ISFREE(licp, i)) {
			continue;
		}
		lip = lidp->lid_item;
		lip->li_desc = NULL;

		/*
		 * Disassociate the logged item from this transaction
		 */
		if (lip->li_type == XFS_LI_BUF) {
			xfs_buf_log_item_t	*bip;

			bip = (xfs_buf_log_item_t *)lidp->lid_item;
			XFS_BUF_SET_FSPRIVATE2(bip->bli_buf, NULL);
			bip->bli_flags &= ~XFS_BLI_HOLD;
		}
		else if (lip->li_type == XFS_LI_INODE) {
			xfs_inode_log_item_t	*iip;

			iip = (xfs_inode_log_item_t*)lidp->lid_item;
			iip->ili_inode->i_transp = NULL;
			iip->ili_flags &= ~XFS_ILI_HOLD;
		}
		else {
			fprintf(stderr, "%s: unrecognised log item type\n",
				progname);
			ASSERT(0);
		}

		/*
		 * Free the descriptor if the item is not dirty
		 * within this transaction and the caller is not
		 * going to just free the entire thing regardless.
		 */
		if (!(freeing_chunk) &&
		    (!(lidp->lid_flags & XFS_LID_DIRTY) || abort)) {
			XFS_LIC_RELSE(licp, i);
			freed++;
		}
	}

	return (freed);
}


/*
 * Commit the changes represented by this transaction
 */
int
libxfs_trans_commit(xfs_trans_t *tp, uint flags, xfs_lsn_t *commit_lsn_p)
{
	xfs_sb_t	*sbp;

	if (tp == NULL)
		return 0;

	if (!(tp->t_flags & XFS_TRANS_DIRTY)) {
#ifdef XACT_DEBUG
		fprintf(stderr, "committed clean transaction %p\n", tp);
#endif
		xfs_trans_free_items(tp, flags);
		free(tp);
		tp = NULL;
		return 0;
	}

	if (tp->t_flags & XFS_TRANS_SB_DIRTY) {
		sbp = &(tp->t_mountp->m_sb);
		if (tp->t_icount_delta)
			sbp->sb_icount += tp->t_icount_delta;
		if (tp->t_ifree_delta)
			sbp->sb_ifree += tp->t_ifree_delta;
		if (tp->t_fdblocks_delta)
			sbp->sb_fdblocks += tp->t_fdblocks_delta;
		if (tp->t_frextents_delta)
			sbp->sb_frextents += tp->t_frextents_delta;
		libxfs_mod_sb(tp, XFS_SB_ALL_BITS);
	}

#ifdef XACT_DEBUG
	fprintf(stderr, "committing dirty transaction %p\n", tp);
#endif
	trans_committed(tp);

	/* That's it for the transaction structure.  Free it. */
	free(tp);
	tp = NULL;
	return 0;
}