[linux-2.6-block.git] / fs / xfs / xfs_trans_extfree.c

/*
 * 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_types.h"
#include "xfs_log.h"
#include "xfs_inum.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
#include "xfs_dmapi.h"
#include "xfs_mount.h"
#include "xfs_trans_priv.h"
#include "xfs_extfree_item.h"

/*
 * This routine is called to allocate an "extent free intention"
 * log item that will hold nextents worth of extents.  The
 * caller must use all nextents extents, because we are not
 * flexible about this at all.
 */
xfs_efi_log_item_t *
xfs_trans_get_efi(xfs_trans_t	*tp,
		  uint		nextents)
{
	xfs_efi_log_item_t	*efip;

	ASSERT(tp != NULL);
	ASSERT(nextents > 0);

	efip = xfs_efi_init(tp->t_mountp, nextents);
	ASSERT(efip != NULL);

	/*
	 * Get a log_item_desc to point at the new item.
	 */
	(void) xfs_trans_add_item(tp, (xfs_log_item_t*)efip);

	return (efip);
}

/*
 * This routine is called to indicate that the described
 * extent is to be logged as needing to be freed.  It should
 * be called once for each extent to be freed.
 */
void
xfs_trans_log_efi_extent(xfs_trans_t		*tp,
			 xfs_efi_log_item_t	*efip,
			 xfs_fsblock_t		start_block,
			 xfs_extlen_t		ext_len)
{
	xfs_log_item_desc_t	*lidp;
	uint			next_extent;
	xfs_extent_t		*extp;

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

	tp->t_flags |= XFS_TRANS_DIRTY;
	lidp->lid_flags |= XFS_LID_DIRTY;

	next_extent = efip->efi_next_extent;
	ASSERT(next_extent < efip->efi_format.efi_nextents);
	extp = &(efip->efi_format.efi_extents[next_extent]);
	extp->ext_start = start_block;
	extp->ext_len = ext_len;
	efip->efi_next_extent++;
}


/*
 * This routine is called to allocate an "extent free done"
 * log item that will hold nextents worth of extents.  The
 * caller must use all nextents extents, because we are not
 * flexible about this at all.
 */
xfs_efd_log_item_t *
xfs_trans_get_efd(xfs_trans_t		*tp,
		  xfs_efi_log_item_t	*efip,
		  uint			nextents)
{
	xfs_efd_log_item_t	*efdp;

	ASSERT(tp != NULL);
	ASSERT(nextents > 0);

	efdp = xfs_efd_init(tp->t_mountp, efip, nextents);
	ASSERT(efdp != NULL);

	/*
	 * Get a log_item_desc to point at the new item.
	 */
	(void) xfs_trans_add_item(tp, (xfs_log_item_t*)efdp);

	return (efdp);
}

/*
 * This routine is called to indicate that the described
 * extent is to be logged as having been freed.  It should
 * be called once for each extent freed.
 */
void
xfs_trans_log_efd_extent(xfs_trans_t		*tp,
			 xfs_efd_log_item_t	*efdp,
			 xfs_fsblock_t		start_block,
			 xfs_extlen_t		ext_len)
{
	xfs_log_item_desc_t	*lidp;
	uint			next_extent;
	xfs_extent_t		*extp;

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

	tp->t_flags |= XFS_TRANS_DIRTY;
	lidp->lid_flags |= XFS_LID_DIRTY;

	next_extent = efdp->efd_next_extent;
	ASSERT(next_extent < efdp->efd_format.efd_nextents);
	extp = &(efdp->efd_format.efd_extents[next_extent]);
	extp->ext_start = start_block;
	extp->ext_len = ext_len;
	efdp->efd_next_extent++;
}
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000,2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 NS	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
1da177e4	13	*
7b718769 NS	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write the Free Software Foundation,
	16	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
1da177e4	17	*/
1da177e4	18	#include "xfs.h"
a844f451	19	#include "xfs_fs.h"
1da177e4	20	#include "xfs_types.h"
1da177e4	21	#include "xfs_log.h"
a844f451	22	#include "xfs_inum.h"
1da177e4 LT	23	#include "xfs_trans.h"
1da177e4 LT	24	#include "xfs_sb.h"
da353b0d	25	#include "xfs_ag.h"
1da177e4 LT	26	#include "xfs_dmapi.h"
	27	#include "xfs_mount.h"
	28	#include "xfs_trans_priv.h"
	29	#include "xfs_extfree_item.h"
	30
	31	/*
	32	* This routine is called to allocate an "extent free intention"
	33	* log item that will hold nextents worth of extents. The
	34	* caller must use all nextents extents, because we are not
	35	* flexible about this at all.
	36	*/
	37	xfs_efi_log_item_t *
	38	xfs_trans_get_efi(xfs_trans_t *tp,
	39	uint nextents)
	40	{
	41	xfs_efi_log_item_t *efip;
	42
	43	ASSERT(tp != NULL);
	44	ASSERT(nextents > 0);
	45
	46	efip = xfs_efi_init(tp->t_mountp, nextents);
	47	ASSERT(efip != NULL);
	48
	49	/*
	50	* Get a log_item_desc to point at the new item.
	51	*/
	52	(void) xfs_trans_add_item(tp, (xfs_log_item_t*)efip);
	53
	54	return (efip);
	55	}
	56
	57	/*
	58	* This routine is called to indicate that the described
	59	* extent is to be logged as needing to be freed. It should
	60	* be called once for each extent to be freed.
	61	*/
	62	void
	63	xfs_trans_log_efi_extent(xfs_trans_t *tp,
	64	xfs_efi_log_item_t *efip,
	65	xfs_fsblock_t start_block,
	66	xfs_extlen_t ext_len)
	67	{
	68	xfs_log_item_desc_t *lidp;
	69	uint next_extent;
	70	xfs_extent_t *extp;
	71
	72	lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)efip);
	73	ASSERT(lidp != NULL);
	74
	75	tp->t_flags \|= XFS_TRANS_DIRTY;
	76	lidp->lid_flags \|= XFS_LID_DIRTY;
	77
	78	next_extent = efip->efi_next_extent;
	79	ASSERT(next_extent < efip->efi_format.efi_nextents);
	80	extp = &(efip->efi_format.efi_extents[next_extent]);
	81	extp->ext_start = start_block;
	82	extp->ext_len = ext_len;
	83	efip->efi_next_extent++;
	84	}
	85
	86
	87	/*
	88	* This routine is called to allocate an "extent free done"
	89	* log item that will hold nextents worth of extents. The
90	* caller must use all nextents extents, because we are not
91	* flexible about this at all.
92	*/
93	xfs_efd_log_item_t *
94	xfs_trans_get_efd(xfs_trans_t *tp,
95	xfs_efi_log_item_t *efip,
96	uint nextents)
97	{
98	xfs_efd_log_item_t *efdp;
99
100	ASSERT(tp != NULL);
101	ASSERT(nextents > 0);
102
103	efdp = xfs_efd_init(tp->t_mountp, efip, nextents);
104	ASSERT(efdp != NULL);
105
106	/*
107	* Get a log_item_desc to point at the new item.
108	*/
109	(void) xfs_trans_add_item(tp, (xfs_log_item_t*)efdp);
110
111	return (efdp);
112	}
113
114	/*
115	* This routine is called to indicate that the described
116	* extent is to be logged as having been freed. It should
117	* be called once for each extent freed.
118	*/
119	void
120	xfs_trans_log_efd_extent(xfs_trans_t *tp,
121	xfs_efd_log_item_t *efdp,
122	xfs_fsblock_t start_block,
123	xfs_extlen_t ext_len)
124	{
125	xfs_log_item_desc_t *lidp;
126	uint next_extent;
127	xfs_extent_t *extp;
128
129	lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)efdp);
130	ASSERT(lidp != NULL);
131
132	tp->t_flags \|= XFS_TRANS_DIRTY;
133	lidp->lid_flags \|= XFS_LID_DIRTY;
134
135	next_extent = efdp->efd_next_extent;
136	ASSERT(next_extent < efdp->efd_format.efd_nextents);
137	extp = &(efdp->efd_format.efd_extents[next_extent]);
138	extp->ext_start = start_block;
139	extp->ext_len = ext_len;
140	efdp->efd_next_extent++;
141	}