[mirror_ubuntu-bionic-kernel.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 - 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;

	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;
	91	if (lbcount > inode->i_size && lbcount - inode->i_size < inode->i_sb->s_blocksize)
	92	{
	93	nelen = elen - (lbcount - inode->i_size);
ff116fc8 JK	94	epos.offset -= adsize;
	95	extent_trunc(inode, &epos, eloc, etype, elen, nelen);
	96	epos.offset += adsize;
1da177e4 LT	97	lbcount = inode->i_size;
	98	}
	99	}
ff116fc8 JK	100	if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
ff116fc8 JK	101	epos.offset -= adsize;
1da177e4	102	lbcount -= elen;
ff116fc8 JK	103	extent_trunc(inode, &epos, eloc, etype, elen, 0);
ff116fc8 JK	104	if (!epos.bh)
1da177e4	105	{
ff116fc8	106	UDF_I_LENALLOC(inode) = epos.offset - udf_file_entry_alloc_offset(inode);
1da177e4 LT	107	mark_inode_dirty(inode);
	108	}
	109	else
	110	{
ff116fc8 JK	111	struct allocExtDesc aed = (struct allocExtDesc )(epos.bh->b_data);
ff116fc8 JK	112	aed->lengthAllocDescs = cpu_to_le32(epos.offset - sizeof(struct allocExtDesc));
1da177e4	113	if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) \|\| UDF_SB_UDFREV(inode->i_sb) >= 0x0201)
ff116fc8	114	udf_update_tag(epos.bh->b_data, epos.offset);
1da177e4	115	else
ff116fc8 JK	116	udf_update_tag(epos.bh->b_data, sizeof(struct allocExtDesc));
ff116fc8 JK	117	mark_buffer_dirty_inode(epos.bh, inode);
1da177e4 LT	118	}
	119	}
	120	UDF_I_LENEXTENTS(inode) = lbcount;
	121
3bf25cb4	122	brelse(epos.bh);
1da177e4 LT	123	}
	124
	125	void udf_truncate_extents(struct inode * inode)
	126	{
ff116fc8 JK	127	struct extent_position epos;
	128	kernel_lb_addr eloc, neloc = { 0, 0 };
	129	uint32_t elen, nelen = 0, indirect_ext_len = 0, lenalloc;
1da177e4	130	int8_t etype;
60448b1d JK	131	sector_t first_block = inode->i_size >> inode->i_sb->s_blocksize_bits, offset;
60448b1d JK	132	loff_t byte_offset;
1da177e4 LT	133	int adsize;
	134
	135	if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT)
	136	adsize = sizeof(short_ad);
	137	else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG)
	138	adsize = sizeof(long_ad);
	139	else
ff116fc8	140	BUG();
1da177e4	141
ff116fc8	142	etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
60448b1d	143	byte_offset = (offset << inode->i_sb->s_blocksize_bits) + (inode->i_size & (inode->i_sb->s_blocksize-1));
1da177e4 LT	144	if (etype != -1)
1da177e4 LT	145	{
ff116fc8 JK	146	epos.offset -= adsize;
	147	extent_trunc(inode, &epos, eloc, etype, elen, byte_offset);
	148	epos.offset += adsize;
60448b1d	149	if (byte_offset)
ff116fc8	150	lenalloc = epos.offset;
1da177e4	151	else
ff116fc8	152	lenalloc = epos.offset - adsize;
1da177e4	153
ff116fc8	154	if (!epos.bh)
1da177e4 LT	155	lenalloc -= udf_file_entry_alloc_offset(inode);
	156	else
	157	lenalloc -= sizeof(struct allocExtDesc);
	158
ff116fc8	159	while ((etype = udf_current_aext(inode, &epos, &eloc, &elen, 0)) != -1)
1da177e4 LT	160	{
	161	if (etype == (EXT_NEXT_EXTENT_ALLOCDECS >> 30))
	162	{
ff116fc8 JK	163	udf_write_aext(inode, &epos, neloc, nelen, 0);
ff116fc8 JK	164	if (indirect_ext_len)
1da177e4	165	{
ff116fc8 JK	166	/* We managed to free all extents in the
	167	* indirect extent - free it too */
	168	if (!epos.bh)
1da177e4	169	BUG();
ff116fc8	170	udf_free_blocks(inode->i_sb, inode, epos.block, 0, indirect_ext_len);
1da177e4 LT	171	}
	172	else
	173	{
ff116fc8	174	if (!epos.bh)
1da177e4 LT	175	{
	176	UDF_I_LENALLOC(inode) = lenalloc;
	177	mark_inode_dirty(inode);
	178	}
	179	else
	180	{
ff116fc8	181	struct allocExtDesc aed = (struct allocExtDesc )(epos.bh->b_data);
1da177e4 LT	182	aed->lengthAllocDescs = cpu_to_le32(lenalloc);
1da177e4 LT	183	if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) \|\| UDF_SB_UDFREV(inode->i_sb) >= 0x0201)
ff116fc8	184	udf_update_tag(epos.bh->b_data, lenalloc +
1da177e4 LT	185	sizeof(struct allocExtDesc));
1da177e4 LT	186	else
ff116fc8 JK	187	udf_update_tag(epos.bh->b_data, sizeof(struct allocExtDesc));
ff116fc8 JK	188	mark_buffer_dirty_inode(epos.bh, inode);
1da177e4 LT	189	}
1da177e4 LT	190	}
ff116fc8 JK	191	brelse(epos.bh);
	192	epos.offset = sizeof(struct allocExtDesc);
	193	epos.block = eloc;
	194	epos.bh = udf_tread(inode->i_sb, udf_get_lb_pblock(inode->i_sb, eloc, 0));
1da177e4	195	if (elen)
ff116fc8 JK	196	indirect_ext_len = (elen +
ff116fc8 JK	197	inode->i_sb->s_blocksize - 1) >>
1da177e4 LT	198	inode->i_sb->s_blocksize_bits;
1da177e4 LT	199	else
ff116fc8	200	indirect_ext_len = 1;
1da177e4 LT	201	}
	202	else
	203	{
ff116fc8 JK	204	extent_trunc(inode, &epos, eloc, etype, elen, 0);
ff116fc8 JK	205	epos.offset += adsize;
1da177e4 LT	206	}
	207	}
	208
ff116fc8	209	if (indirect_ext_len)
1da177e4	210	{
ff116fc8	211	if (!epos.bh)
1da177e4	212	BUG();
ff116fc8	213	udf_free_blocks(inode->i_sb, inode, epos.block, 0, indirect_ext_len);
1da177e4 LT	214	}
	215	else
	216	{
ff116fc8	217	if (!epos.bh)
1da177e4 LT	218	{
	219	UDF_I_LENALLOC(inode) = lenalloc;
	220	mark_inode_dirty(inode);
	221	}
	222	else
	223	{
ff116fc8	224	struct allocExtDesc aed = (struct allocExtDesc )(epos.bh->b_data);
1da177e4 LT	225	aed->lengthAllocDescs = cpu_to_le32(lenalloc);
1da177e4 LT	226	if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) \|\| UDF_SB_UDFREV(inode->i_sb) >= 0x0201)
ff116fc8	227	udf_update_tag(epos.bh->b_data, lenalloc +
1da177e4 LT	228	sizeof(struct allocExtDesc));
1da177e4 LT	229	else
ff116fc8 JK	230	udf_update_tag(epos.bh->b_data, sizeof(struct allocExtDesc));
ff116fc8 JK	231	mark_buffer_dirty_inode(epos.bh, inode);
1da177e4 LT	232	}
	233	}
	234	}
	235	else if (inode->i_size)
	236	{
60448b1d	237	if (byte_offset)
1da177e4	238	{
00a2b0f6 JK	239	/*
	240	* OK, there is not extent covering inode->i_size and
	241	* no extent above inode->i_size => truncate is
	242	* extending the file by 'offset'.
	243	*/
ff116fc8 JK	244	if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) \|\|
ff116fc8 JK	245	(epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
00a2b0f6 JK	246	/* File has no extents at all! */
00a2b0f6 JK	247	memset(&eloc, 0x00, sizeof(kernel_lb_addr));
60448b1d	248	elen = EXT_NOT_RECORDED_NOT_ALLOCATED \| byte_offset;
ff116fc8	249	udf_add_aext(inode, &epos, eloc, elen, 1);
1da177e4	250	}
00a2b0f6	251	else {
ff116fc8 JK	252	epos.offset -= adsize;
	253	etype = udf_next_aext(inode, &epos, &eloc, &elen, 1);
	254
00a2b0f6 JK	255	if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
00a2b0f6 JK	256	{
ff116fc8	257	epos.offset -= adsize;
60448b1d	258	elen = EXT_NOT_RECORDED_NOT_ALLOCATED \| (elen + byte_offset);
ff116fc8	259	udf_write_aext(inode, &epos, eloc, elen, 0);
00a2b0f6 JK	260	}
00a2b0f6 JK	261	else if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
1da177e4	262	{
00a2b0f6	263	kernel_lb_addr neloc = { 0, 0 };
ff116fc8	264	epos.offset -= adsize;
00a2b0f6	265	nelen = EXT_NOT_RECORDED_NOT_ALLOCATED \|
60448b1d	266	((elen + byte_offset + inode->i_sb->s_blocksize - 1) &
1da177e4	267	~(inode->i_sb->s_blocksize - 1));
ff116fc8 JK	268	udf_write_aext(inode, &epos, neloc, nelen, 1);
ff116fc8 JK	269	udf_add_aext(inode, &epos, eloc, (etype << 30) \| elen, 1);
00a2b0f6 JK	270	}
	271	else
	272	{
	273	if (elen & (inode->i_sb->s_blocksize - 1))
	274	{
ff116fc8	275	epos.offset -= adsize;
00a2b0f6 JK	276	elen = EXT_RECORDED_ALLOCATED \|
	277	((elen + inode->i_sb->s_blocksize - 1) &
	278	~(inode->i_sb->s_blocksize - 1));
ff116fc8	279	udf_write_aext(inode, &epos, eloc, elen, 1);
00a2b0f6 JK	280	}
00a2b0f6 JK	281	memset(&eloc, 0x00, sizeof(kernel_lb_addr));
60448b1d	282	elen = EXT_NOT_RECORDED_NOT_ALLOCATED \| byte_offset;
ff116fc8	283	udf_add_aext(inode, &epos, eloc, elen, 1);
1da177e4	284	}
1da177e4 LT	285	}
	286	}
	287	}
	288	UDF_I_LENEXTENTS(inode) = inode->i_size;
	289
3bf25cb4	290	brelse(epos.bh);
1da177e4	291	}