[mirror_ubuntu-artful-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/buffer_head.h>

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

static void extent_trunc(struct inode *inode, struct extent_position *epos,
			 struct kernel_lb_addr *eloc, int8_t etype, uint32_t elen,
			 uint32_t nelen)
{
	struct kernel_lb_addr neloc = {};
	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);
		}
	}
}

/*
 * Truncate the last extent to match i_size. This function assumes
 * that preallocation extent is already truncated.
 */
void udf_truncate_tail_extent(struct inode *inode)
{
	struct extent_position epos = {};
	struct kernel_lb_addr eloc;
	uint32_t elen, nelen;
	uint64_t lbcount = 0;
	int8_t etype = -1, netype;
	int adsize;
	struct udf_inode_info *iinfo = UDF_I(inode);

	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB ||
	    inode->i_size == iinfo->i_lenExtents)
		return;
	/* Are we going to delete the file anyway? */
	if (inode->i_nlink == 0)
		return;

	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
		adsize = sizeof(struct short_ad);
	else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
		adsize = sizeof(struct long_ad);
	else
		BUG();

	/* 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) {
			if (lbcount - inode->i_size >= inode->i_sb->s_blocksize)
				printk(KERN_WARNING
				       "udf_truncate_tail_extent(): Too long "
				       "extent after EOF in inode %u: i_size: "
				       "%Ld lbcount: %Ld extent %u+%u\n",
				       (unsigned)inode->i_ino,
				       (long long)inode->i_size,
				       (long long)lbcount,
				       (unsigned)eloc.logicalBlockNum,
				       (unsigned)elen);
			nelen = elen - (lbcount - inode->i_size);
			epos.offset -= adsize;
			extent_trunc(inode, &epos, &eloc, etype, elen, nelen);
			epos.offset += adsize;
			if (udf_next_aext(inode, &epos, &eloc, &elen, 1) != -1)
				printk(KERN_ERR "udf_truncate_tail_extent(): "
				       "Extent after EOF in inode %u.\n",
				       (unsigned)inode->i_ino);
			break;
		}
	}
	/* This inode entry is in-memory only and thus we don't have to mark
	 * the inode dirty */
	iinfo->i_lenExtents = inode->i_size;
	brelse(epos.bh);
}

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

	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB ||
	    inode->i_size == iinfo->i_lenExtents)
		return;

	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
		adsize = sizeof(struct short_ad);
	else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
		adsize = sizeof(struct long_ad);
	else
		adsize = 0;

	epos.block = iinfo->i_location;

	/* Find the last extent in the file */
	while ((netype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
		etype = netype;
		lbcount += elen;
	}
	if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
		epos.offset -= adsize;
		lbcount -= elen;
		extent_trunc(inode, &epos, &eloc, etype, elen, 0);
		if (!epos.bh) {
			iinfo->i_lenAlloc =
				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(inode->i_sb)->s_udfrev >= 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);
		}
	}
	/* This inode entry is in-memory only and thus we don't have to mark
	 * the inode dirty */
	iinfo->i_lenExtents = lbcount;
	brelse(epos.bh);
}

static void udf_update_alloc_ext_desc(struct inode *inode,
				      struct extent_position *epos,
				      u32 lenalloc)
{
	struct super_block *sb = inode->i_sb;
	struct udf_sb_info *sbi = UDF_SB(sb);

	struct allocExtDesc *aed = (struct allocExtDesc *) (epos->bh->b_data);
	int len = sizeof(struct allocExtDesc);

	aed->lengthAllocDescs =	cpu_to_le32(lenalloc);
	if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT) || sbi->s_udfrev >= 0x0201)
		len += lenalloc;

	udf_update_tag(epos->bh->b_data, len);
	mark_buffer_dirty_inode(epos->bh, inode);
}

/*
 * Truncate extents of inode to inode->i_size. This function can be used only
 * for making file shorter. For making file longer, udf_extend_file() has to
 * be used.
 */
void udf_truncate_extents(struct inode *inode)
{
	struct extent_position epos;
	struct kernel_lb_addr eloc, neloc = {};
	uint32_t elen, nelen = 0, indirect_ext_len = 0, lenalloc;
	int8_t etype;
	struct super_block *sb = inode->i_sb;
	sector_t first_block = inode->i_size >> sb->s_blocksize_bits, offset;
	loff_t byte_offset;
	int adsize;
	struct udf_inode_info *iinfo = UDF_I(inode);

	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
		adsize = sizeof(struct short_ad);
	else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
		adsize = sizeof(struct long_ad);
	else
		BUG();

	etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
	byte_offset = (offset << sb->s_blocksize_bits) +
		(inode->i_size & (sb->s_blocksize - 1));
	if (etype == -1) {
		/* We should extend the file? */
		WARN_ON(byte_offset);
		return;
	}
	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 */
				BUG_ON(!epos.bh);
				udf_free_blocks(sb, inode, &epos.block,
						0, indirect_ext_len);
			} else if (!epos.bh) {
				iinfo->i_lenAlloc = lenalloc;
				mark_inode_dirty(inode);
			} else
				udf_update_alloc_ext_desc(inode,
						&epos, lenalloc);
			brelse(epos.bh);
			epos.offset = sizeof(struct allocExtDesc);
			epos.block = eloc;
			epos.bh = udf_tread(sb,
					udf_get_lb_pblock(sb, &eloc, 0));
			if (elen)
				indirect_ext_len =
					(elen + sb->s_blocksize - 1) >>
					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) {
		BUG_ON(!epos.bh);
		udf_free_blocks(sb, inode, &epos.block, 0, indirect_ext_len);
	} else if (!epos.bh) {
		iinfo->i_lenAlloc = lenalloc;
		mark_inode_dirty(inode);
	} else
		udf_update_alloc_ext_desc(inode, &epos, lenalloc);
	iinfo->i_lenExtents = 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>
1da177e4 LT	25	#include <linux/buffer_head.h>
	26
	27	#include "udf_i.h"
	28	#include "udf_sb.h"
	29
cb00ea35	30	static void extent_trunc(struct inode inode, struct extent_position epos,
97e961fd	31	struct kernel_lb_addr *eloc, int8_t etype, uint32_t elen,
cb00ea35	32	uint32_t nelen)
1da177e4	33	{
5ca4e4be	34	struct kernel_lb_addr neloc = {};
28de7948 CG	35	int last_block = (elen + inode->i_sb->s_blocksize - 1) >>
	36	inode->i_sb->s_blocksize_bits;
	37	int first_block = (nelen + inode->i_sb->s_blocksize - 1) >>
	38	inode->i_sb->s_blocksize_bits;
1da177e4	39
cb00ea35 CG	40	if (nelen) {
	41	if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
	42	udf_free_blocks(inode->i_sb, inode, eloc, 0,
	43	last_block);
1da177e4	44	etype = (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30);
cb00ea35	45	} else
97e961fd	46	neloc = *eloc;
1da177e4 LT	47	nelen = (etype << 30) \| nelen;
	48	}
	49
cb00ea35	50	if (elen != nelen) {
97e961fd	51	udf_write_aext(inode, epos, &neloc, nelen, 0);
cb00ea35	52	if (last_block - first_block > 0) {
1da177e4 LT	53	if (etype == (EXT_RECORDED_ALLOCATED >> 30))
	54	mark_inode_dirty(inode);
	55
	56	if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
cb00ea35 CG	57	udf_free_blocks(inode->i_sb, inode, eloc,
	58	first_block,
	59	last_block - first_block);
1da177e4 LT	60	}
	61	}
	62	}
	63
74584ae5 JK	64	/*
	65	* Truncate the last extent to match i_size. This function assumes
	66	* that preallocation extent is already truncated.
	67	*/
	68	void udf_truncate_tail_extent(struct inode *inode)
1da177e4	69	{
28de7948	70	struct extent_position epos = {};
5ca4e4be	71	struct kernel_lb_addr eloc;
ff116fc8	72	uint32_t elen, nelen;
1da177e4 LT	73	uint64_t lbcount = 0;
1da177e4 LT	74	int8_t etype = -1, netype;
1da177e4	75	int adsize;
48d6d8ff	76	struct udf_inode_info *iinfo = UDF_I(inode);
1da177e4	77
48d6d8ff MS	78	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB \|\|
48d6d8ff MS	79	inode->i_size == iinfo->i_lenExtents)
74584ae5 JK	80	return;
	81	/* Are we going to delete the file anyway? */
	82	if (inode->i_nlink == 0)
1da177e4	83	return;
1da177e4	84
48d6d8ff	85	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
5ca4e4be	86	adsize = sizeof(struct short_ad);
48d6d8ff	87	else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
5ca4e4be	88	adsize = sizeof(struct long_ad);
1da177e4	89	else
74584ae5	90	BUG();
1da177e4	91
ff116fc8	92	/* Find the last extent in the file */
cb00ea35	93	while ((netype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
1da177e4 LT	94	etype = netype;
1da177e4 LT	95	lbcount += elen;
74584ae5 JK	96	if (lbcount > inode->i_size) {
	97	if (lbcount - inode->i_size >= inode->i_sb->s_blocksize)
	98	printk(KERN_WARNING
	99	"udf_truncate_tail_extent(): Too long "
	100	"extent after EOF in inode %u: i_size: "
	101	"%Ld lbcount: %Ld extent %u+%u\n",
	102	(unsigned)inode->i_ino,
	103	(long long)inode->i_size,
	104	(long long)lbcount,
	105	(unsigned)eloc.logicalBlockNum,
	106	(unsigned)elen);
1da177e4	107	nelen = elen - (lbcount - inode->i_size);
ff116fc8	108	epos.offset -= adsize;
97e961fd	109	extent_trunc(inode, &epos, &eloc, etype, elen, nelen);
ff116fc8	110	epos.offset += adsize;
74584ae5 JK	111	if (udf_next_aext(inode, &epos, &eloc, &elen, 1) != -1)
	112	printk(KERN_ERR "udf_truncate_tail_extent(): "
	113	"Extent after EOF in inode %u.\n",
	114	(unsigned)inode->i_ino);
	115	break;
1da177e4 LT	116	}
1da177e4 LT	117	}
74584ae5 JK	118	/* This inode entry is in-memory only and thus we don't have to mark
74584ae5 JK	119	* the inode dirty */
48d6d8ff	120	iinfo->i_lenExtents = inode->i_size;
74584ae5 JK	121	brelse(epos.bh);
	122	}
	123
	124	void udf_discard_prealloc(struct inode *inode)
	125	{
cb00ea35	126	struct extent_position epos = { NULL, 0, {0, 0} };
5ca4e4be	127	struct kernel_lb_addr eloc;
74584ae5 JK	128	uint32_t elen;
	129	uint64_t lbcount = 0;
	130	int8_t etype = -1, netype;
	131	int adsize;
48d6d8ff	132	struct udf_inode_info *iinfo = UDF_I(inode);
74584ae5	133
48d6d8ff MS	134	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB \|\|
48d6d8ff MS	135	inode->i_size == iinfo->i_lenExtents)
74584ae5 JK	136	return;
74584ae5 JK	137
48d6d8ff	138	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
5ca4e4be	139	adsize = sizeof(struct short_ad);
48d6d8ff	140	else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
5ca4e4be	141	adsize = sizeof(struct long_ad);
74584ae5 JK	142	else
	143	adsize = 0;
	144
48d6d8ff	145	epos.block = iinfo->i_location;
74584ae5 JK	146
	147	/* Find the last extent in the file */
	148	while ((netype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
	149	etype = netype;
	150	lbcount += elen;
	151	}
ff116fc8 JK	152	if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
ff116fc8 JK	153	epos.offset -= adsize;
1da177e4	154	lbcount -= elen;
97e961fd	155	extent_trunc(inode, &epos, &eloc, etype, elen, 0);
74584ae5	156	if (!epos.bh) {
48d6d8ff	157	iinfo->i_lenAlloc =
4b11111a MS	158	epos.offset -
4b11111a MS	159	udf_file_entry_alloc_offset(inode);
1da177e4	160	mark_inode_dirty(inode);
74584ae5	161	} else {
cb00ea35	162	struct allocExtDesc *aed =
28de7948	163	(struct allocExtDesc *)(epos.bh->b_data);
cb00ea35	164	aed->lengthAllocDescs =
28de7948 CG	165	cpu_to_le32(epos.offset -
	166	sizeof(struct allocExtDesc));
	167	if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) \|\|
6c79e987	168	UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
ff116fc8	169	udf_update_tag(epos.bh->b_data, epos.offset);
1da177e4	170	else
cb00ea35 CG	171	udf_update_tag(epos.bh->b_data,
cb00ea35 CG	172	sizeof(struct allocExtDesc));
ff116fc8	173	mark_buffer_dirty_inode(epos.bh, inode);
1da177e4 LT	174	}
1da177e4 LT	175	}
74584ae5 JK	176	/* This inode entry is in-memory only and thus we don't have to mark
74584ae5 JK	177	* the inode dirty */
48d6d8ff	178	iinfo->i_lenExtents = lbcount;
3bf25cb4	179	brelse(epos.bh);
1da177e4 LT	180	}
1da177e4 LT	181
456390de	182	static void udf_update_alloc_ext_desc(struct inode *inode,
	183	struct extent_position *epos,
	184	u32 lenalloc)
	185	{
	186	struct super_block *sb = inode->i_sb;
	187	struct udf_sb_info *sbi = UDF_SB(sb);
	188
	189	struct allocExtDesc aed = (struct allocExtDesc ) (epos->bh->b_data);
	190	int len = sizeof(struct allocExtDesc);
	191
	192	aed->lengthAllocDescs = cpu_to_le32(lenalloc);
	193	if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT) \|\| sbi->s_udfrev >= 0x0201)
	194	len += lenalloc;
	195
	196	udf_update_tag(epos->bh->b_data, len);
	197	mark_buffer_dirty_inode(epos->bh, inode);
	198	}
	199
7e49b6f2 JK	200	/*
	201	* Truncate extents of inode to inode->i_size. This function can be used only
	202	* for making file shorter. For making file longer, udf_extend_file() has to
	203	* be used.
	204	*/
cb00ea35	205	void udf_truncate_extents(struct inode *inode)
1da177e4	206	{
ff116fc8	207	struct extent_position epos;
5ca4e4be	208	struct kernel_lb_addr eloc, neloc = {};
ff116fc8	209	uint32_t elen, nelen = 0, indirect_ext_len = 0, lenalloc;
1da177e4	210	int8_t etype;
31170b6a JK	211	struct super_block *sb = inode->i_sb;
31170b6a JK	212	sector_t first_block = inode->i_size >> sb->s_blocksize_bits, offset;
60448b1d	213	loff_t byte_offset;
1da177e4	214	int adsize;
48d6d8ff	215	struct udf_inode_info *iinfo = UDF_I(inode);
1da177e4	216
48d6d8ff	217	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
5ca4e4be	218	adsize = sizeof(struct short_ad);
48d6d8ff	219	else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
5ca4e4be	220	adsize = sizeof(struct long_ad);
1da177e4	221	else
ff116fc8	222	BUG();
1da177e4	223
ff116fc8	224	etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
28de7948 CG	225	byte_offset = (offset << sb->s_blocksize_bits) +
28de7948 CG	226	(inode->i_size & (sb->s_blocksize - 1));
7e49b6f2 JK	227	if (etype == -1) {
	228	/* We should extend the file? */
	229	WARN_ON(byte_offset);
	230	return;
	231	}
	232	epos.offset -= adsize;
	233	extent_trunc(inode, &epos, &eloc, etype, elen, byte_offset);
	234	epos.offset += adsize;
	235	if (byte_offset)
	236	lenalloc = epos.offset;
	237	else
	238	lenalloc = epos.offset - adsize;
1da177e4	239
7e49b6f2 JK	240	if (!epos.bh)
	241	lenalloc -= udf_file_entry_alloc_offset(inode);
	242	else
	243	lenalloc -= sizeof(struct allocExtDesc);
31170b6a	244
7e49b6f2 JK	245	while ((etype = udf_current_aext(inode, &epos, &eloc,
	246	&elen, 0)) != -1) {
	247	if (etype == (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
	248	udf_write_aext(inode, &epos, &neloc, nelen, 0);
	249	if (indirect_ext_len) {
	250	/* We managed to free all extents in the
	251	* indirect extent - free it too */
	252	BUG_ON(!epos.bh);
	253	udf_free_blocks(sb, inode, &epos.block,
	254	0, indirect_ext_len);
	255	} else if (!epos.bh) {
	256	iinfo->i_lenAlloc = lenalloc;
	257	mark_inode_dirty(inode);
	258	} else
	259	udf_update_alloc_ext_desc(inode,
	260	&epos, lenalloc);
	261	brelse(epos.bh);
	262	epos.offset = sizeof(struct allocExtDesc);
	263	epos.block = eloc;
	264	epos.bh = udf_tread(sb,
	265	udf_get_lb_pblock(sb, &eloc, 0));
	266	if (elen)
	267	indirect_ext_len =
	268	(elen + sb->s_blocksize - 1) >>
	269	sb->s_blocksize_bits;
	270	else
	271	indirect_ext_len = 1;
	272	} else {
	273	extent_trunc(inode, &epos, &eloc, etype, elen, 0);
	274	epos.offset += adsize;
1da177e4 LT	275	}
1da177e4 LT	276	}
7e49b6f2 JK	277
	278	if (indirect_ext_len) {
	279	BUG_ON(!epos.bh);
	280	udf_free_blocks(sb, inode, &epos.block, 0, indirect_ext_len);
	281	} else if (!epos.bh) {
	282	iinfo->i_lenAlloc = lenalloc;
	283	mark_inode_dirty(inode);
	284	} else
	285	udf_update_alloc_ext_desc(inode, &epos, lenalloc);
48d6d8ff	286	iinfo->i_lenExtents = inode->i_size;
1da177e4	287
3bf25cb4	288	brelse(epos.bh);
1da177e4	289	}