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

/*
 * directory.c
 *
 * PURPOSE
 *	Directory related functions
 *
 * 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.
 */

#include "udfdecl.h"
#include "udf_i.h"

#include <linux/fs.h>
#include <linux/string.h>
#include <linux/buffer_head.h>

#if 0
static uint8_t *udf_filead_read(struct inode *dir, uint8_t * tmpad,
				uint8_t ad_size, kernel_lb_addr fe_loc,
				int *pos, int *offset, struct buffer_head **bh,
				int *error)
{
	int loffset = *offset;
	int block;
	uint8_t *ad;
	int remainder;

	*error = 0;

	ad = (uint8_t *)(*bh)->b_data + *offset;
	*offset += ad_size;

	if (!ad) {
		brelse(*bh);
		*error = 1;
		return NULL;
	}

	if (*offset == dir->i_sb->s_blocksize) {
		brelse(*bh);
		block = udf_get_lb_pblock(dir->i_sb, fe_loc, ++*pos);
		if (!block)
			return NULL;
		if (!(*bh = udf_tread(dir->i_sb, block)))
			return NULL;
	} else if (*offset > dir->i_sb->s_blocksize) {
		ad = tmpad;

		remainder = dir->i_sb->s_blocksize - loffset;
		memcpy((uint8_t *)ad, (*bh)->b_data + loffset, remainder);

		brelse(*bh);
		block = udf_get_lb_pblock(dir->i_sb, fe_loc, ++*pos);
		if (!block)
			return NULL;
		if (!((*bh) = udf_tread(dir->i_sb, block)))
			return NULL;

		memcpy((uint8_t *)ad + remainder, (*bh)->b_data, ad_size - remainder);
		*offset = ad_size - remainder;
	}

	return ad;
}
#endif

struct fileIdentDesc *udf_fileident_read(struct inode *dir, loff_t * nf_pos,
					 struct udf_fileident_bh *fibh,
					 struct fileIdentDesc *cfi,
					 struct extent_position *epos,
					 kernel_lb_addr * eloc, uint32_t * elen,
					 sector_t * offset)
{
	struct fileIdentDesc *fi;
	int i, num, block;
	struct buffer_head *tmp, *bha[16];

	fibh->soffset = fibh->eoffset;

	if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) {
		fi = udf_get_fileident(UDF_I_DATA(dir) -
				       (UDF_I_EFE(dir) ?
					sizeof(struct extendedFileEntry) :
					sizeof(struct fileEntry)),
				       dir->i_sb->s_blocksize, &(fibh->eoffset));
		if (!fi)
			return NULL;

		*nf_pos += ((fibh->eoffset - fibh->soffset) >> 2);

		memcpy((uint8_t *)cfi, (uint8_t *)fi,
		       sizeof(struct fileIdentDesc));

		return fi;
	}

	if (fibh->eoffset == dir->i_sb->s_blocksize) {
		int lextoffset = epos->offset;

		if (udf_next_aext(dir, epos, eloc, elen, 1) !=
		    (EXT_RECORDED_ALLOCATED >> 30))
			return NULL;

		block = udf_get_lb_pblock(dir->i_sb, *eloc, *offset);

		(*offset)++;

		if ((*offset << dir->i_sb->s_blocksize_bits) >= *elen)
			*offset = 0;
		else
			epos->offset = lextoffset;

		brelse(fibh->sbh);
		if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block)))
			return NULL;
		fibh->soffset = fibh->eoffset = 0;

		if (!(*offset & ((16 >> (dir->i_sb->s_blocksize_bits - 9)) - 1))) {
			i = 16 >> (dir->i_sb->s_blocksize_bits - 9);
			if (i + *offset > (*elen >> dir->i_sb->s_blocksize_bits))
				i = (*elen >> dir->i_sb->s_blocksize_bits)-*offset;
			for (num = 0; i > 0; i--) {
				block = udf_get_lb_pblock(dir->i_sb, *eloc, *offset + i);
				tmp = udf_tgetblk(dir->i_sb, block);
				if (tmp && !buffer_uptodate(tmp) && !buffer_locked(tmp))
					bha[num++] = tmp;
				else
					brelse(tmp);
			}
			if (num) {
				ll_rw_block(READA, num, bha);
				for (i = 0; i < num; i++)
					brelse(bha[i]);
			}
		}
	} else if (fibh->sbh != fibh->ebh) {
		brelse(fibh->sbh);
		fibh->sbh = fibh->ebh;
	}

	fi = udf_get_fileident(fibh->sbh->b_data, dir->i_sb->s_blocksize,
			       &(fibh->eoffset));

	if (!fi)
		return NULL;

	*nf_pos += ((fibh->eoffset - fibh->soffset) >> 2);

	if (fibh->eoffset <= dir->i_sb->s_blocksize) {
		memcpy((uint8_t *)cfi, (uint8_t *)fi,
		       sizeof(struct fileIdentDesc));
	} else if (fibh->eoffset > dir->i_sb->s_blocksize) {
		int lextoffset = epos->offset;

		if (udf_next_aext(dir, epos, eloc, elen, 1) !=
		    (EXT_RECORDED_ALLOCATED >> 30))
			return NULL;

		block = udf_get_lb_pblock(dir->i_sb, *eloc, *offset);

		(*offset)++;

		if ((*offset << dir->i_sb->s_blocksize_bits) >= *elen)
			*offset = 0;
		else
			epos->offset = lextoffset;

		fibh->soffset -= dir->i_sb->s_blocksize;
		fibh->eoffset -= dir->i_sb->s_blocksize;

		if (!(fibh->ebh = udf_tread(dir->i_sb, block)))
			return NULL;

		if (sizeof(struct fileIdentDesc) > -fibh->soffset) {
			int fi_len;

			memcpy((uint8_t *)cfi, (uint8_t *)fi, -fibh->soffset);
			memcpy((uint8_t *)cfi - fibh->soffset, fibh->ebh->b_data,
			       sizeof(struct fileIdentDesc) + fibh->soffset);

			fi_len = (sizeof(struct fileIdentDesc) + cfi->lengthFileIdent +
				  le16_to_cpu(cfi->lengthOfImpUse) + 3) & ~3;

			*nf_pos += ((fi_len - (fibh->eoffset - fibh->soffset)) >> 2);
			fibh->eoffset = fibh->soffset + fi_len;
		} else {
			memcpy((uint8_t *)cfi, (uint8_t *)fi,
			       sizeof(struct fileIdentDesc));
		}
	}
	return fi;
}

struct fileIdentDesc *udf_get_fileident(void *buffer, int bufsize, int *offset)
{
	struct fileIdentDesc *fi;
	int lengthThisIdent;
	uint8_t *ptr;
	int padlen;

	if ((!buffer) || (!offset)) {
		udf_debug("invalidparms\n, buffer=%p, offset=%p\n", buffer,
			  offset);
		return NULL;
	}

	ptr = buffer;

	if ((*offset > 0) && (*offset < bufsize)) {
		ptr += *offset;
	}
	fi = (struct fileIdentDesc *)ptr;
	if (le16_to_cpu(fi->descTag.tagIdent) != TAG_IDENT_FID) {
		udf_debug("0x%x != TAG_IDENT_FID\n",
			  le16_to_cpu(fi->descTag.tagIdent));
		udf_debug("offset: %u sizeof: %lu bufsize: %u\n",
			  *offset, (unsigned long)sizeof(struct fileIdentDesc),
			  bufsize);
		return NULL;
	}
	if ((*offset + sizeof(struct fileIdentDesc)) > bufsize) {
		lengthThisIdent = sizeof(struct fileIdentDesc);
	} else {
		lengthThisIdent = sizeof(struct fileIdentDesc) +
			fi->lengthFileIdent + le16_to_cpu(fi->lengthOfImpUse);
	}

	/* we need to figure padding, too! */
	padlen = lengthThisIdent % UDF_NAME_PAD;
	if (padlen)
		lengthThisIdent += (UDF_NAME_PAD - padlen);
	*offset = *offset + lengthThisIdent;

	return fi;
}

#if 0
static extent_ad *udf_get_fileextent(void *buffer, int bufsize, int *offset)
{
	extent_ad *ext;
	struct fileEntry *fe;
	uint8_t *ptr;

	if ((!buffer) || (!offset)) {
		printk(KERN_ERR "udf: udf_get_fileextent() invalidparms\n");
		return NULL;
	}

	fe = (struct fileEntry *)buffer;

	if (le16_to_cpu(fe->descTag.tagIdent) != TAG_IDENT_FE) {
		udf_debug("0x%x != TAG_IDENT_FE\n",
			  le16_to_cpu(fe->descTag.tagIdent));
		return NULL;
	}

	ptr = (uint8_t *)(fe->extendedAttr) + le32_to_cpu(fe->lengthExtendedAttr);

	if ((*offset > 0) && (*offset < le32_to_cpu(fe->lengthAllocDescs))) {
		ptr += *offset;
	}

	ext = (extent_ad *)ptr;

	*offset = *offset + sizeof(extent_ad);
	return ext;
}
#endif

short_ad *udf_get_fileshortad(uint8_t *ptr, int maxoffset, int *offset,
			      int inc)
{
	short_ad *sa;

	if ((!ptr) || (!offset)) {
		printk(KERN_ERR "udf: udf_get_fileshortad() invalidparms\n");
		return NULL;
	}

	if ((*offset < 0) || ((*offset + sizeof(short_ad)) > maxoffset))
		return NULL;
	else if ((sa = (short_ad *)ptr)->extLength == 0)
		return NULL;

	if (inc)
		*offset += sizeof(short_ad);
	return sa;
}

long_ad *udf_get_filelongad(uint8_t *ptr, int maxoffset, int *offset, int inc)
{
	long_ad *la;

	if ((!ptr) || (!offset)) {
		printk(KERN_ERR "udf: udf_get_filelongad() invalidparms\n");
		return NULL;
	}

	if ((*offset < 0) || ((*offset + sizeof(long_ad)) > maxoffset))
		return NULL;
	else if ((la = (long_ad *)ptr)->extLength == 0)
		return NULL;

	if (inc)
		*offset += sizeof(long_ad);
	return la;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* directory.c
	3	*
	4	* PURPOSE
	5	* Directory related functions
	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
	14	#include "udfdecl.h"
	15	#include "udf_i.h"
	16
	17	#include <linux/fs.h>
	18	#include <linux/string.h>
	19	#include <linux/buffer_head.h>
	20
	21	#if 0
cb00ea35 CG	22	static uint8_t udf_filead_read(struct inode dir, uint8_t * tmpad,
	23	uint8_t ad_size, kernel_lb_addr fe_loc,
	24	int pos, int offset, struct buffer_head **bh,
	25	int *error)
1da177e4 LT	26	{
	27	int loffset = *offset;
	28	int block;
	29	uint8_t *ad;
	30	int remainder;
	31
	32	*error = 0;
	33
28de7948	34	ad = (uint8_t )(bh)->b_data + *offset;
1da177e4 LT	35	*offset += ad_size;
1da177e4 LT	36
cb00ea35	37	if (!ad) {
3bf25cb4	38	brelse(*bh);
1da177e4 LT	39	*error = 1;
	40	return NULL;
	41	}
	42
cb00ea35	43	if (*offset == dir->i_sb->s_blocksize) {
3bf25cb4	44	brelse(*bh);
1da177e4 LT	45	block = udf_get_lb_pblock(dir->i_sb, fe_loc, ++*pos);
	46	if (!block)
	47	return NULL;
	48	if (!(*bh = udf_tread(dir->i_sb, block)))
	49	return NULL;
cb00ea35	50	} else if (*offset > dir->i_sb->s_blocksize) {
1da177e4 LT	51	ad = tmpad;
	52
	53	remainder = dir->i_sb->s_blocksize - loffset;
28de7948	54	memcpy((uint8_t )ad, (bh)->b_data + loffset, remainder);
1da177e4	55
3bf25cb4	56	brelse(*bh);
1da177e4 LT	57	block = udf_get_lb_pblock(dir->i_sb, fe_loc, ++*pos);
	58	if (!block)
	59	return NULL;
	60	if (!((*bh) = udf_tread(dir->i_sb, block)))
	61	return NULL;
	62
28de7948	63	memcpy((uint8_t )ad + remainder, (bh)->b_data, ad_size - remainder);
1da177e4 LT	64	*offset = ad_size - remainder;
1da177e4 LT	65	}
28de7948	66
1da177e4 LT	67	return ad;
	68	}
	69	#endif
	70
cb00ea35 CG	71	struct fileIdentDesc udf_fileident_read(struct inode dir, loff_t * nf_pos,
	72	struct udf_fileident_bh *fibh,
	73	struct fileIdentDesc *cfi,
	74	struct extent_position *epos,
	75	kernel_lb_addr * eloc, uint32_t * elen,
	76	sector_t * offset)
1da177e4 LT	77	{
	78	struct fileIdentDesc *fi;
	79	int i, num, block;
cb00ea35	80	struct buffer_head tmp, bha[16];
1da177e4 LT	81
	82	fibh->soffset = fibh->eoffset;
	83
cb00ea35	84	if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) {
1da177e4	85	fi = udf_get_fileident(UDF_I_DATA(dir) -
cb00ea35 CG	86	(UDF_I_EFE(dir) ?
	87	sizeof(struct extendedFileEntry) :
	88	sizeof(struct fileEntry)),
28de7948	89	dir->i_sb->s_blocksize, &(fibh->eoffset));
1da177e4 LT	90	if (!fi)
	91	return NULL;
	92
	93	*nf_pos += ((fibh->eoffset - fibh->soffset) >> 2);
	94
28de7948	95	memcpy((uint8_t )cfi, (uint8_t )fi,
cb00ea35	96	sizeof(struct fileIdentDesc));
1da177e4 LT	97
	98	return fi;
	99	}
	100
cb00ea35	101	if (fibh->eoffset == dir->i_sb->s_blocksize) {
ff116fc8	102	int lextoffset = epos->offset;
1da177e4	103
ff116fc8	104	if (udf_next_aext(dir, epos, eloc, elen, 1) !=
cb00ea35	105	(EXT_RECORDED_ALLOCATED >> 30))
1da177e4	106	return NULL;
1da177e4 LT	107
	108	block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
	109
cb00ea35	110	(*offset)++;
1da177e4 LT	111
	112	if ((offset << dir->i_sb->s_blocksize_bits) >= elen)
	113	*offset = 0;
	114	else
ff116fc8	115	epos->offset = lextoffset;
1da177e4	116
3bf25cb4	117	brelse(fibh->sbh);
1da177e4 LT	118	if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block)))
	119	return NULL;
	120	fibh->soffset = fibh->eoffset = 0;
	121
28de7948	122	if (!(*offset & ((16 >> (dir->i_sb->s_blocksize_bits - 9)) - 1))) {
1da177e4	123	i = 16 >> (dir->i_sb->s_blocksize_bits - 9);
28de7948 CG	124	if (i + offset > (elen >> dir->i_sb->s_blocksize_bits))
28de7948 CG	125	i = (elen >> dir->i_sb->s_blocksize_bits)-offset;
cb00ea35	126	for (num = 0; i > 0; i--) {
28de7948	127	block = udf_get_lb_pblock(dir->i_sb, eloc, offset + i);
1da177e4	128	tmp = udf_tgetblk(dir->i_sb, block);
28de7948	129	if (tmp && !buffer_uptodate(tmp) && !buffer_locked(tmp))
1da177e4 LT	130	bha[num++] = tmp;
	131	else
	132	brelse(tmp);
	133	}
cb00ea35	134	if (num) {
1da177e4	135	ll_rw_block(READA, num, bha);
cb00ea35	136	for (i = 0; i < num; i++)
1da177e4 LT	137	brelse(bha[i]);
	138	}
	139	}
cb00ea35	140	} else if (fibh->sbh != fibh->ebh) {
3bf25cb4	141	brelse(fibh->sbh);
1da177e4 LT	142	fibh->sbh = fibh->ebh;
	143	}
	144
	145	fi = udf_get_fileident(fibh->sbh->b_data, dir->i_sb->s_blocksize,
cb00ea35	146	&(fibh->eoffset));
1da177e4 LT	147
	148	if (!fi)
	149	return NULL;
	150
	151	*nf_pos += ((fibh->eoffset - fibh->soffset) >> 2);
	152
cb00ea35	153	if (fibh->eoffset <= dir->i_sb->s_blocksize) {
28de7948	154	memcpy((uint8_t )cfi, (uint8_t )fi,
cb00ea35 CG	155	sizeof(struct fileIdentDesc));
cb00ea35 CG	156	} else if (fibh->eoffset > dir->i_sb->s_blocksize) {
ff116fc8	157	int lextoffset = epos->offset;
1da177e4	158
ff116fc8	159	if (udf_next_aext(dir, epos, eloc, elen, 1) !=
cb00ea35	160	(EXT_RECORDED_ALLOCATED >> 30))
1da177e4	161	return NULL;
1da177e4 LT	162
	163	block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
	164
cb00ea35	165	(*offset)++;
1da177e4 LT	166
	167	if ((offset << dir->i_sb->s_blocksize_bits) >= elen)
	168	*offset = 0;
	169	else
ff116fc8	170	epos->offset = lextoffset;
1da177e4 LT	171
	172	fibh->soffset -= dir->i_sb->s_blocksize;
	173	fibh->eoffset -= dir->i_sb->s_blocksize;
	174
	175	if (!(fibh->ebh = udf_tread(dir->i_sb, block)))
	176	return NULL;
	177
cb00ea35	178	if (sizeof(struct fileIdentDesc) > -fibh->soffset) {
1da177e4 LT	179	int fi_len;
1da177e4 LT	180
28de7948 CG	181	memcpy((uint8_t )cfi, (uint8_t )fi, -fibh->soffset);
28de7948 CG	182	memcpy((uint8_t *)cfi - fibh->soffset, fibh->ebh->b_data,
cb00ea35	183	sizeof(struct fileIdentDesc) + fibh->soffset);
1da177e4	184
28de7948 CG	185	fi_len = (sizeof(struct fileIdentDesc) + cfi->lengthFileIdent +
28de7948 CG	186	le16_to_cpu(cfi->lengthOfImpUse) + 3) & ~3;
1da177e4	187
28de7948	188	*nf_pos += ((fi_len - (fibh->eoffset - fibh->soffset)) >> 2);
1da177e4	189	fibh->eoffset = fibh->soffset + fi_len;
cb00ea35	190	} else {
28de7948	191	memcpy((uint8_t )cfi, (uint8_t )fi,
cb00ea35	192	sizeof(struct fileIdentDesc));
1da177e4 LT	193	}
	194	}
	195	return fi;
	196	}
	197
cb00ea35	198	struct fileIdentDesc udf_get_fileident(void buffer, int bufsize, int *offset)
1da177e4 LT	199	{
	200	struct fileIdentDesc *fi;
	201	int lengthThisIdent;
cb00ea35	202	uint8_t *ptr;
1da177e4 LT	203	int padlen;
1da177e4 LT	204
cb00ea35 CG	205	if ((!buffer) \|\| (!offset)) {
	206	udf_debug("invalidparms\n, buffer=%p, offset=%p\n", buffer,
	207	offset);
1da177e4 LT	208	return NULL;
	209	}
	210
	211	ptr = buffer;
	212
cb00ea35	213	if ((offset > 0) && (offset < bufsize)) {
1da177e4 LT	214	ptr += *offset;
1da177e4 LT	215	}
cb00ea35 CG	216	fi = (struct fileIdentDesc *)ptr;
cb00ea35 CG	217	if (le16_to_cpu(fi->descTag.tagIdent) != TAG_IDENT_FID) {
1da177e4	218	udf_debug("0x%x != TAG_IDENT_FID\n",
cb00ea35	219	le16_to_cpu(fi->descTag.tagIdent));
1da177e4	220	udf_debug("offset: %u sizeof: %lu bufsize: %u\n",
cb00ea35 CG	221	*offset, (unsigned long)sizeof(struct fileIdentDesc),
cb00ea35 CG	222	bufsize);
1da177e4 LT	223	return NULL;
1da177e4 LT	224	}
cb00ea35	225	if ((*offset + sizeof(struct fileIdentDesc)) > bufsize) {
1da177e4	226	lengthThisIdent = sizeof(struct fileIdentDesc);
28de7948	227	} else {
1da177e4	228	lengthThisIdent = sizeof(struct fileIdentDesc) +
28de7948 CG	229	fi->lengthFileIdent + le16_to_cpu(fi->lengthOfImpUse);
28de7948 CG	230	}
1da177e4 LT	231
	232	/* we need to figure padding, too! */
	233	padlen = lengthThisIdent % UDF_NAME_PAD;
	234	if (padlen)
	235	lengthThisIdent += (UDF_NAME_PAD - padlen);
	236	offset = offset + lengthThisIdent;
	237
	238	return fi;
	239	}
	240
	241	#if 0
cb00ea35	242	static extent_ad udf_get_fileextent(void buffer, int bufsize, int *offset)
1da177e4	243	{
cb00ea35	244	extent_ad *ext;
1da177e4	245	struct fileEntry *fe;
cb00ea35	246	uint8_t *ptr;
1da177e4	247
cb00ea35	248	if ((!buffer) \|\| (!offset)) {
1da177e4 LT	249	printk(KERN_ERR "udf: udf_get_fileextent() invalidparms\n");
	250	return NULL;
	251	}
	252
	253	fe = (struct fileEntry *)buffer;
	254
cb00ea35	255	if (le16_to_cpu(fe->descTag.tagIdent) != TAG_IDENT_FE) {
1da177e4	256	udf_debug("0x%x != TAG_IDENT_FE\n",
cb00ea35	257	le16_to_cpu(fe->descTag.tagIdent));
1da177e4 LT	258	return NULL;
	259	}
	260
28de7948	261	ptr = (uint8_t *)(fe->extendedAttr) + le32_to_cpu(fe->lengthExtendedAttr);
1da177e4	262
cb00ea35	263	if ((offset > 0) && (offset < le32_to_cpu(fe->lengthAllocDescs))) {
1da177e4 LT	264	ptr += *offset;
	265	}
	266
28de7948	267	ext = (extent_ad *)ptr;
1da177e4 LT	268
	269	offset = offset + sizeof(extent_ad);
	270	return ext;
	271	}
	272	#endif
	273
28de7948	274	short_ad udf_get_fileshortad(uint8_t ptr, int maxoffset, int *offset,
cb00ea35	275	int inc)
1da177e4 LT	276	{
	277	short_ad *sa;
	278
cb00ea35	279	if ((!ptr) \|\| (!offset)) {
1da177e4 LT	280	printk(KERN_ERR "udf: udf_get_fileshortad() invalidparms\n");
	281	return NULL;
	282	}
	283
cb00ea35	284	if ((offset < 0) \|\| ((offset + sizeof(short_ad)) > maxoffset))
1da177e4	285	return NULL;
28de7948	286	else if ((sa = (short_ad *)ptr)->extLength == 0)
1da177e4 LT	287	return NULL;
	288
	289	if (inc)
	290	*offset += sizeof(short_ad);
	291	return sa;
	292	}
	293
28de7948	294	long_ad udf_get_filelongad(uint8_t ptr, int maxoffset, int *offset, int inc)
1da177e4 LT	295	{
	296	long_ad *la;
	297
cb00ea35	298	if ((!ptr) \|\| (!offset)) {
1da177e4 LT	299	printk(KERN_ERR "udf: udf_get_filelongad() invalidparms\n");
	300	return NULL;
	301	}
	302
cb00ea35	303	if ((offset < 0) \|\| ((offset + sizeof(long_ad)) > maxoffset))
1da177e4	304	return NULL;
28de7948	305	else if ((la = (long_ad *)ptr)->extLength == 0)
1da177e4 LT	306	return NULL;
	307
	308	if (inc)
	309	*offset += sizeof(long_ad);
	310	return la;
	311	}