[deliverable/linux.git] / fs / udf / truncate.c

/*
 * truncate.c
 *
 * PURPOSE
 *	Truncate handling routines for the OSTA-UDF(tm) filesystem.
 *
 * COPYRIGHT
 *	This file is distributed under the terms of the GNU General Public
 *	License (GPL). Copies of the GPL can be obtained from:
 *		ftp://prep.ai.mit.edu/pub/gnu/GPL
 *	Each contributing author retains all rights to their own work.
 *
 *  (C) 1999-2004 Ben Fennema
 *  (C) 1999 Stelias Computing Inc
 *
 * HISTORY
 *
 *  02/24/99 blf  Created.
 *
 */

#include "udfdecl.h"
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/udf_fs.h>
#include <linux/buffer_head.h>

#include "udf_i.h"
#include "udf_sb.h"

static void extent_trunc(struct inode * inode, struct extent_position *epos,
	kernel_lb_addr eloc, int8_t etype, uint32_t elen, uint32_t nelen)
{
	kernel_lb_addr neloc = { 0, 0 };
	int last_block = (elen + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits;
	int first_block = (nelen + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits;

	if (nelen)
	{
		if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
		{
			udf_free_blocks(inode->i_sb, inode, eloc, 0, last_block);
			etype = (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30);
		}
		else
			neloc = eloc;
		nelen = (etype << 30) | nelen;
	}

	if (elen != nelen)
	{
		udf_write_aext(inode, epos, neloc, nelen, 0);
		if (last_block - first_block > 0)
		{
			if (etype == (EXT_RECORDED_ALLOCATED >> 30))
				mark_inode_dirty(inode);

			if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
				udf_free_blocks(inode->i_sb, inode, eloc, first_block, last_block - first_block);
		}
	}
}

void udf_discard_prealloc(struct inode * inode)
{
	struct extent_position epos = { NULL, 0, {0, 0}};
	kernel_lb_addr eloc;
	uint32_t elen, nelen;
	uint64_t lbcount = 0;
	int8_t etype = -1, netype;
	int adsize;

	if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB ||
		inode->i_size == UDF_I_LENEXTENTS(inode))
		return;

	if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT)
		adsize = sizeof(short_ad);
	else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG)
		adsize = sizeof(long_ad);
	else
		adsize = 0;

	epos.block = UDF_I_LOCATION(inode);

	/* Find the last extent in the file */
	while ((netype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1)
	{
		etype = netype;
		lbcount += elen;
		if (lbcount > inode->i_size && lbcount - elen < inode->i_size)
		{
			WARN_ON(lbcount - inode->i_size >= inode->i_sb->s_blocksize);
			nelen = elen - (lbcount - inode->i_size);
			epos.offset -= adsize;
			extent_trunc(inode, &epos, eloc, etype, elen, nelen);
			epos.offset += adsize;
			lbcount = inode->i_size;
		}
	}
	if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
		epos.offset -= adsize;
		lbcount -= elen;
		extent_trunc(inode, &epos, eloc, etype, elen, 0);
		if (!epos.bh)
		{
			UDF_I_LENALLOC(inode) = epos.offset - udf_file_entry_alloc_offset(inode);
			mark_inode_dirty(inode);
		}
		else
		{
			struct allocExtDesc *aed = (struct allocExtDesc *)(epos.bh->b_data);
			aed->lengthAllocDescs = cpu_to_le32(epos.offset - sizeof(struct allocExtDesc));
			if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201)
				udf_update_tag(epos.bh->b_data, epos.offset);
			else
				udf_update_tag(epos.bh->b_data, sizeof(struct allocExtDesc));
			mark_buffer_dirty_inode(epos.bh, inode);
		}
	}
	UDF_I_LENEXTENTS(inode) = lbcount;

	WARN_ON(lbcount != inode->i_size);
	brelse(epos.bh);
}

void udf_truncate_extents(struct inode * inode)
{
	struct extent_position epos;
	kernel_lb_addr eloc, neloc = { 0, 0 };
	uint32_t elen, nelen = 0, indirect_ext_len = 0, lenalloc;
	int8_t etype;
	sector_t first_block = inode->i_size >> inode->i_sb->s_blocksize_bits, offset;
	loff_t byte_offset;
	int adsize;

	if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT)
		adsize = sizeof(short_ad);
	else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG)
		adsize = sizeof(long_ad);
	else
		BUG();

	etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
	byte_offset = (offset << inode->i_sb->s_blocksize_bits) + (inode->i_size & (inode->i_sb->s_blocksize-1));
	if (etype != -1)
	{
		epos.offset -= adsize;
		extent_trunc(inode, &epos, eloc, etype, elen, byte_offset);
		epos.offset += adsize;
		if (byte_offset)
			lenalloc = epos.offset;
		else
			lenalloc = epos.offset - adsize;

		if (!epos.bh)
			lenalloc -= udf_file_entry_alloc_offset(inode);
		else
			lenalloc -= sizeof(struct allocExtDesc);

		while ((etype = udf_current_aext(inode, &epos, &eloc, &elen, 0)) != -1)
		{
			if (etype == (EXT_NEXT_EXTENT_ALLOCDECS >> 30))
			{
				udf_write_aext(inode, &epos, neloc, nelen, 0);
				if (indirect_ext_len)
				{
					/* We managed to free all extents in the
					 * indirect extent - free it too */
					if (!epos.bh)
						BUG();
					udf_free_blocks(inode->i_sb, inode, epos.block, 0, indirect_ext_len);
				}
				else
				{
					if (!epos.bh)
					{
						UDF_I_LENALLOC(inode) = lenalloc;
						mark_inode_dirty(inode);
					}
					else
					{
						struct allocExtDesc *aed = (struct allocExtDesc *)(epos.bh->b_data);
						aed->lengthAllocDescs = cpu_to_le32(lenalloc);
						if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201)
							udf_update_tag(epos.bh->b_data, lenalloc +
								sizeof(struct allocExtDesc));
						else
							udf_update_tag(epos.bh->b_data, sizeof(struct allocExtDesc));
						mark_buffer_dirty_inode(epos.bh, inode);
					}
				}
				brelse(epos.bh);
				epos.offset = sizeof(struct allocExtDesc);
				epos.block = eloc;
				epos.bh = udf_tread(inode->i_sb, udf_get_lb_pblock(inode->i_sb, eloc, 0));
				if (elen)
					indirect_ext_len = (elen +
						inode->i_sb->s_blocksize - 1) >>
						inode->i_sb->s_blocksize_bits;
				else
					indirect_ext_len = 1;
			}
			else
			{
				extent_trunc(inode, &epos, eloc, etype, elen, 0);
				epos.offset += adsize;
			}
		}

		if (indirect_ext_len)
		{
			if (!epos.bh)
				BUG();
			udf_free_blocks(inode->i_sb, inode, epos.block, 0, indirect_ext_len);
		}
		else
		{
			if (!epos.bh)
			{
				UDF_I_LENALLOC(inode) = lenalloc;
				mark_inode_dirty(inode);
			}
			else
			{
				struct allocExtDesc *aed = (struct allocExtDesc *)(epos.bh->b_data);
				aed->lengthAllocDescs = cpu_to_le32(lenalloc);
				if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201)
					udf_update_tag(epos.bh->b_data, lenalloc +
						sizeof(struct allocExtDesc));
				else
					udf_update_tag(epos.bh->b_data, sizeof(struct allocExtDesc));
				mark_buffer_dirty_inode(epos.bh, inode);
			}
		}
	}
	else if (inode->i_size)
	{
		if (byte_offset)
		{
			/*
			 *  OK, there is not extent covering inode->i_size and
			 *  no extent above inode->i_size => truncate is
			 *  extending the file by 'offset'.
			 */
			if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
			    (epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
				/* File has no extents at all! */
				memset(&eloc, 0x00, sizeof(kernel_lb_addr));
				elen = EXT_NOT_RECORDED_NOT_ALLOCATED | byte_offset;
				udf_add_aext(inode, &epos, eloc, elen, 1);
			}
			else {
				epos.offset -= adsize;
				etype = udf_next_aext(inode, &epos, &eloc, &elen, 1);

				if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
				{
					epos.offset -= adsize;
					elen = EXT_NOT_RECORDED_NOT_ALLOCATED | (elen + byte_offset);
					udf_write_aext(inode, &epos, eloc, elen, 0);
				}
				else if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
				{
					kernel_lb_addr neloc = { 0, 0 };
					epos.offset -= adsize;
					nelen = EXT_NOT_RECORDED_NOT_ALLOCATED |
						((elen + byte_offset + inode->i_sb->s_blocksize - 1) &
						~(inode->i_sb->s_blocksize - 1));
					udf_write_aext(inode, &epos, neloc, nelen, 1);
					udf_add_aext(inode, &epos, eloc, (etype << 30) | elen, 1);
				}
				else
				{
					if (elen & (inode->i_sb->s_blocksize - 1))
					{
						epos.offset -= adsize;
						elen = EXT_RECORDED_ALLOCATED |
							((elen + inode->i_sb->s_blocksize - 1) &
							~(inode->i_sb->s_blocksize - 1));
						udf_write_aext(inode, &epos, eloc, elen, 1);
					}
					memset(&eloc, 0x00, sizeof(kernel_lb_addr));
					elen = EXT_NOT_RECORDED_NOT_ALLOCATED | byte_offset;
					udf_add_aext(inode, &epos, eloc, elen, 1);
				}
			}
		}
	}
	UDF_I_LENEXTENTS(inode) = inode->i_size;

	brelse(epos.bh);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* truncate.c
	3	*
	4	* PURPOSE
	5	* Truncate handling routines for the OSTA-UDF(tm) filesystem.
	6	*
1da177e4 LT	7	* COPYRIGHT
	8	* This file is distributed under the terms of the GNU General Public
	9	* License (GPL). Copies of the GPL can be obtained from:
	10	* ftp://prep.ai.mit.edu/pub/gnu/GPL
	11	* Each contributing author retains all rights to their own work.
	12	*
	13	* (C) 1999-2004 Ben Fennema
	14	* (C) 1999 Stelias Computing Inc
	15	*
	16	* HISTORY
	17	*
	18	* 02/24/99 blf Created.
	19	*
	20	*/
	21
	22	#include "udfdecl.h"
	23	#include <linux/fs.h>
	24	#include <linux/mm.h>
	25	#include <linux/udf_fs.h>
	26	#include <linux/buffer_head.h>
	27
	28	#include "udf_i.h"
	29	#include "udf_sb.h"
	30
ff116fc8 JK	31	static void extent_trunc(struct inode * inode, struct extent_position *epos,
ff116fc8 JK	32	kernel_lb_addr eloc, int8_t etype, uint32_t elen, uint32_t nelen)
1da177e4 LT	33	{
	34	kernel_lb_addr neloc = { 0, 0 };
	35	int last_block = (elen + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits;
	36	int first_block = (nelen + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits;
	37
	38	if (nelen)
	39	{
	40	if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
	41	{
	42	udf_free_blocks(inode->i_sb, inode, eloc, 0, last_block);
	43	etype = (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30);
	44	}
	45	else
	46	neloc = eloc;
	47	nelen = (etype << 30) \| nelen;
	48	}
	49
	50	if (elen != nelen)
	51	{
ff116fc8	52	udf_write_aext(inode, epos, neloc, nelen, 0);
1da177e4 LT	53	if (last_block - first_block > 0)
	54	{
	55	if (etype == (EXT_RECORDED_ALLOCATED >> 30))
	56	mark_inode_dirty(inode);
	57
	58	if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
	59	udf_free_blocks(inode->i_sb, inode, eloc, first_block, last_block - first_block);
	60	}
	61	}
	62	}
	63
	64	void udf_discard_prealloc(struct inode * inode)
	65	{
ff116fc8 JK	66	struct extent_position epos = { NULL, 0, {0, 0}};
	67	kernel_lb_addr eloc;
	68	uint32_t elen, nelen;
1da177e4 LT	69	uint64_t lbcount = 0;
1da177e4 LT	70	int8_t etype = -1, netype;
1da177e4 LT	71	int adsize;
	72
	73	if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB \|\|
	74	inode->i_size == UDF_I_LENEXTENTS(inode))
1da177e4	75	return;
1da177e4 LT	76
	77	if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT)
	78	adsize = sizeof(short_ad);
	79	else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG)
	80	adsize = sizeof(long_ad);
	81	else
	82	adsize = 0;
	83
ff116fc8	84	epos.block = UDF_I_LOCATION(inode);
1da177e4	85
ff116fc8 JK	86	/* Find the last extent in the file */
ff116fc8 JK	87	while ((netype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1)
1da177e4 LT	88	{
	89	etype = netype;
	90	lbcount += elen;
948b9b2c	91	if (lbcount > inode->i_size && lbcount - elen < inode->i_size)
1da177e4	92	{
948b9b2c	93	WARN_ON(lbcount - inode->i_size >= inode->i_sb->s_blocksize);
1da177e4	94	nelen = elen - (lbcount - inode->i_size);
ff116fc8 JK	95	epos.offset -= adsize;
	96	extent_trunc(inode, &epos, eloc, etype, elen, nelen);
	97	epos.offset += adsize;
1da177e4 LT	98	lbcount = inode->i_size;
	99	}
	100	}
ff116fc8 JK	101	if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
ff116fc8 JK	102	epos.offset -= adsize;
1da177e4	103	lbcount -= elen;
ff116fc8 JK	104	extent_trunc(inode, &epos, eloc, etype, elen, 0);
ff116fc8 JK	105	if (!epos.bh)
1da177e4	106	{
ff116fc8	107	UDF_I_LENALLOC(inode) = epos.offset - udf_file_entry_alloc_offset(inode);
1da177e4 LT	108	mark_inode_dirty(inode);
	109	}
	110	else
	111	{
ff116fc8 JK	112	struct allocExtDesc aed = (struct allocExtDesc )(epos.bh->b_data);
ff116fc8 JK	113	aed->lengthAllocDescs = cpu_to_le32(epos.offset - sizeof(struct allocExtDesc));
1da177e4	114	if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) \|\| UDF_SB_UDFREV(inode->i_sb) >= 0x0201)
ff116fc8	115	udf_update_tag(epos.bh->b_data, epos.offset);
1da177e4	116	else
ff116fc8 JK	117	udf_update_tag(epos.bh->b_data, sizeof(struct allocExtDesc));
ff116fc8 JK	118	mark_buffer_dirty_inode(epos.bh, inode);
1da177e4 LT	119	}
	120	}
	121	UDF_I_LENEXTENTS(inode) = lbcount;
	122
948b9b2c	123	WARN_ON(lbcount != inode->i_size);
3bf25cb4	124	brelse(epos.bh);
1da177e4 LT	125	}
	126
	127	void udf_truncate_extents(struct inode * inode)
	128	{
ff116fc8 JK	129	struct extent_position epos;
	130	kernel_lb_addr eloc, neloc = { 0, 0 };
	131	uint32_t elen, nelen = 0, indirect_ext_len = 0, lenalloc;
1da177e4	132	int8_t etype;
60448b1d JK	133	sector_t first_block = inode->i_size >> inode->i_sb->s_blocksize_bits, offset;
60448b1d JK	134	loff_t byte_offset;
1da177e4 LT	135	int adsize;
	136
	137	if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT)
	138	adsize = sizeof(short_ad);
	139	else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG)
	140	adsize = sizeof(long_ad);
	141	else
ff116fc8	142	BUG();
1da177e4	143
ff116fc8	144	etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
60448b1d	145	byte_offset = (offset << inode->i_sb->s_blocksize_bits) + (inode->i_size & (inode->i_sb->s_blocksize-1));
1da177e4 LT	146	if (etype != -1)
1da177e4 LT	147	{
ff116fc8 JK	148	epos.offset -= adsize;
	149	extent_trunc(inode, &epos, eloc, etype, elen, byte_offset);
	150	epos.offset += adsize;
60448b1d	151	if (byte_offset)
ff116fc8	152	lenalloc = epos.offset;
1da177e4	153	else
ff116fc8	154	lenalloc = epos.offset - adsize;
1da177e4	155
ff116fc8	156	if (!epos.bh)
1da177e4 LT	157	lenalloc -= udf_file_entry_alloc_offset(inode);
	158	else
	159	lenalloc -= sizeof(struct allocExtDesc);
	160
ff116fc8	161	while ((etype = udf_current_aext(inode, &epos, &eloc, &elen, 0)) != -1)
1da177e4 LT	162	{
	163	if (etype == (EXT_NEXT_EXTENT_ALLOCDECS >> 30))
	164	{
ff116fc8 JK	165	udf_write_aext(inode, &epos, neloc, nelen, 0);
ff116fc8 JK	166	if (indirect_ext_len)
1da177e4	167	{
ff116fc8 JK	168	/* We managed to free all extents in the
	169	* indirect extent - free it too */
	170	if (!epos.bh)
1da177e4	171	BUG();
ff116fc8	172	udf_free_blocks(inode->i_sb, inode, epos.block, 0, indirect_ext_len);
1da177e4 LT	173	}
	174	else
	175	{
ff116fc8	176	if (!epos.bh)
1da177e4 LT	177	{
	178	UDF_I_LENALLOC(inode) = lenalloc;
	179	mark_inode_dirty(inode);
	180	}
	181	else
	182	{
ff116fc8	183	struct allocExtDesc aed = (struct allocExtDesc )(epos.bh->b_data);
1da177e4 LT	184	aed->lengthAllocDescs = cpu_to_le32(lenalloc);
1da177e4 LT	185	if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) \|\| UDF_SB_UDFREV(inode->i_sb) >= 0x0201)
ff116fc8	186	udf_update_tag(epos.bh->b_data, lenalloc +
1da177e4 LT	187	sizeof(struct allocExtDesc));
1da177e4 LT	188	else
ff116fc8 JK	189	udf_update_tag(epos.bh->b_data, sizeof(struct allocExtDesc));
ff116fc8 JK	190	mark_buffer_dirty_inode(epos.bh, inode);
1da177e4 LT	191	}
1da177e4 LT	192	}
ff116fc8 JK	193	brelse(epos.bh);
	194	epos.offset = sizeof(struct allocExtDesc);
	195	epos.block = eloc;
	196	epos.bh = udf_tread(inode->i_sb, udf_get_lb_pblock(inode->i_sb, eloc, 0));
1da177e4	197	if (elen)
ff116fc8 JK	198	indirect_ext_len = (elen +
ff116fc8 JK	199	inode->i_sb->s_blocksize - 1) >>
1da177e4 LT	200	inode->i_sb->s_blocksize_bits;
1da177e4 LT	201	else
ff116fc8	202	indirect_ext_len = 1;
1da177e4 LT	203	}
	204	else
	205	{
ff116fc8 JK	206	extent_trunc(inode, &epos, eloc, etype, elen, 0);
ff116fc8 JK	207	epos.offset += adsize;
1da177e4 LT	208	}
	209	}
	210
ff116fc8	211	if (indirect_ext_len)
1da177e4	212	{
ff116fc8	213	if (!epos.bh)
1da177e4	214	BUG();
ff116fc8	215	udf_free_blocks(inode->i_sb, inode, epos.block, 0, indirect_ext_len);
1da177e4 LT	216	}
	217	else
	218	{
ff116fc8	219	if (!epos.bh)
1da177e4 LT	220	{
	221	UDF_I_LENALLOC(inode) = lenalloc;
	222	mark_inode_dirty(inode);
	223	}
	224	else
	225	{
ff116fc8	226	struct allocExtDesc aed = (struct allocExtDesc )(epos.bh->b_data);
1da177e4 LT	227	aed->lengthAllocDescs = cpu_to_le32(lenalloc);
1da177e4 LT	228	if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) \|\| UDF_SB_UDFREV(inode->i_sb) >= 0x0201)
ff116fc8	229	udf_update_tag(epos.bh->b_data, lenalloc +
1da177e4 LT	230	sizeof(struct allocExtDesc));
1da177e4 LT	231	else
ff116fc8 JK	232	udf_update_tag(epos.bh->b_data, sizeof(struct allocExtDesc));
ff116fc8 JK	233	mark_buffer_dirty_inode(epos.bh, inode);
1da177e4 LT	234	}
	235	}
	236	}
	237	else if (inode->i_size)
	238	{
60448b1d	239	if (byte_offset)
1da177e4	240	{
00a2b0f6 JK	241	/*
	242	* OK, there is not extent covering inode->i_size and
	243	* no extent above inode->i_size => truncate is
	244	* extending the file by 'offset'.
	245	*/
ff116fc8 JK	246	if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) \|\|
ff116fc8 JK	247	(epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
00a2b0f6 JK	248	/* File has no extents at all! */
00a2b0f6 JK	249	memset(&eloc, 0x00, sizeof(kernel_lb_addr));
60448b1d	250	elen = EXT_NOT_RECORDED_NOT_ALLOCATED \| byte_offset;
ff116fc8	251	udf_add_aext(inode, &epos, eloc, elen, 1);
1da177e4	252	}
00a2b0f6	253	else {
ff116fc8 JK	254	epos.offset -= adsize;
	255	etype = udf_next_aext(inode, &epos, &eloc, &elen, 1);
	256
00a2b0f6 JK	257	if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
00a2b0f6 JK	258	{
ff116fc8	259	epos.offset -= adsize;
60448b1d	260	elen = EXT_NOT_RECORDED_NOT_ALLOCATED \| (elen + byte_offset);
ff116fc8	261	udf_write_aext(inode, &epos, eloc, elen, 0);
00a2b0f6 JK	262	}
00a2b0f6 JK	263	else if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
1da177e4	264	{
00a2b0f6	265	kernel_lb_addr neloc = { 0, 0 };
ff116fc8	266	epos.offset -= adsize;
00a2b0f6	267	nelen = EXT_NOT_RECORDED_NOT_ALLOCATED \|
60448b1d	268	((elen + byte_offset + inode->i_sb->s_blocksize - 1) &
1da177e4	269	~(inode->i_sb->s_blocksize - 1));
ff116fc8 JK	270	udf_write_aext(inode, &epos, neloc, nelen, 1);
ff116fc8 JK	271	udf_add_aext(inode, &epos, eloc, (etype << 30) \| elen, 1);
00a2b0f6 JK	272	}
	273	else
	274	{
	275	if (elen & (inode->i_sb->s_blocksize - 1))
	276	{
ff116fc8	277	epos.offset -= adsize;
00a2b0f6 JK	278	elen = EXT_RECORDED_ALLOCATED \|
	279	((elen + inode->i_sb->s_blocksize - 1) &
	280	~(inode->i_sb->s_blocksize - 1));
ff116fc8	281	udf_write_aext(inode, &epos, eloc, elen, 1);
00a2b0f6 JK	282	}
00a2b0f6 JK	283	memset(&eloc, 0x00, sizeof(kernel_lb_addr));
60448b1d	284	elen = EXT_NOT_RECORDED_NOT_ALLOCATED \| byte_offset;
ff116fc8	285	udf_add_aext(inode, &epos, eloc, elen, 1);
1da177e4	286	}
1da177e4 LT	287	}
	288	}
	289	}
	290	UDF_I_LENEXTENTS(inode) = inode->i_size;
	291
3bf25cb4	292	brelse(epos.bh);
1da177e4	293	}