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minix/sbin/newfs_udf/udf_create.c

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/* $NetBSD: udf_create.c,v 1.24 2013/10/19 01:09:59 christos Exp $ */
/*
* Copyright (c) 2006, 2008 Reinoud Zandijk
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
__RCSID("$NetBSD: udf_create.c,v 1.24 2013/10/19 01:09:59 christos Exp $");
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <assert.h>
#include <err.h>
#include <sys/types.h>
#include <sys/param.h>
#include "unicode.h"
#include "udf_create.h"
#if 0
# ifndef DEBUG
# define DEBUG
# endif
#endif
/*
* NOTE that there is some overlap between this code and the udf kernel fs.
* This is intentially though it might better be factored out one day.
*/
void
udf_init_create_context(void)
{
/* clear */
memset(&context, 0, sizeof(struct udf_create_context));
/* fill with defaults currently known */
context.dscrver = 3;
context.min_udf = 0x0102;
context.max_udf = 0x0260;
context.serialnum = 1; /* default */
context.gmtoff = 0;
context.sector_size = 512; /* minimum for UDF */
context.logvol_name = NULL;
context.primary_name = NULL;
context.volset_name = NULL;
context.fileset_name = NULL;
/* most basic identification */
context.app_name = "*NetBSD";
context.app_version_main = 0;
context.app_version_sub = 0;
context.impl_name = "*NetBSD";
context.vds_seq = 0; /* first one starts with zero */
/* Minimum value of 16 : UDF 3.2.1.1, 3.3.3.4. */
context.unique_id = 0x10;
context.num_files = 0;
context.num_directories = 0;
context.data_part = 0;
context.metadata_part = 0;
context.metadata_alloc_pos = 0;
context.data_alloc_pos = 0;
}
/* version can be specified as 0xabc or a.bc */
static int
parse_udfversion(const char *pos, uint32_t *version) {
int hex = 0;
char c1, c2, c3, c4;
*version = 0;
if (*pos == '0') {
pos++;
/* expect hex format */
hex = 1;
if (*pos++ != 'x')
return 1;
}
c1 = *pos++;
if (c1 < '0' || c1 > '9')
return 1;
c1 -= '0';
c2 = *pos++;
if (!hex) {
if (c2 != '.')
return 1;
c2 = *pos++;
}
if (c2 < '0' || c2 > '9')
return 1;
c2 -= '0';
c3 = *pos++;
if (c3 < '0' || c3 > '9')
return 1;
c3 -= '0';
c4 = *pos++;
if (c4 != 0)
return 1;
*version = c1 * 0x100 + c2 * 0x10 + c3;
return 0;
}
/* parse a given string for an udf version */
int
a_udf_version(const char *s, const char *id_type)
{
uint32_t version;
if (parse_udfversion(s, &version))
errx(1, "unknown %s id %s; specify as hex or float", id_type, s);
return version;
}
static uint32_t
udf_space_bitmap_len(uint32_t part_size)
{
return sizeof(struct space_bitmap_desc)-1 +
part_size/8;
}
static uint32_t
udf_bytes_to_sectors(uint64_t bytes)
{
uint32_t sector_size = layout.sector_size;
return (bytes + sector_size -1) / sector_size;
}
int
udf_calculate_disc_layout(int format_flags, int min_udf,
uint32_t wrtrack_skew,
uint32_t first_lba, uint32_t last_lba,
uint32_t sector_size, uint32_t blockingnr,
uint32_t sparable_blocks, float meta_fract)
{
uint64_t kbsize, bytes;
uint32_t sparable_blockingnr;
uint32_t align_blockingnr;
uint32_t pos, mpos;
/* clear */
memset(&layout, 0, sizeof(layout));
/* fill with parameters */
layout.wrtrack_skew = wrtrack_skew;
layout.first_lba = first_lba;
layout.last_lba = last_lba;
layout.sector_size = sector_size;
layout.blockingnr = blockingnr;
layout.sparable_blocks = sparable_blocks;
/* start disc layouting */
/*
* location of iso9660 vrs is defined as first sector AFTER 32kb,
* minimum `sector size' 2048
*/
layout.iso9660_vrs = ((32*1024 + sector_size - 1) / sector_size)
+ first_lba;
/* anchor starts at specified offset in sectors */
layout.anchors[0] = first_lba + 256;
if (format_flags & FORMAT_TRACK512)
layout.anchors[0] = first_lba + 512;
layout.anchors[1] = last_lba - 256;
layout.anchors[2] = last_lba;
/* update workable space */
first_lba = layout.anchors[0] + blockingnr;
last_lba = layout.anchors[1] - 1;
/* XXX rest of anchor packet can be added to unallocated space descr */
/* reserve space for VRS and VRS copy and associated tables */
layout.vds_size = MAX(16, blockingnr); /* UDF 2.2.3.1+2 */
layout.vds1 = first_lba;
first_lba += layout.vds_size; /* next packet */
if (format_flags & FORMAT_SEQUENTIAL) {
/* for sequential, append them ASAP */
layout.vds2 = first_lba;
first_lba += layout.vds_size;
} else {
layout.vds2 = layout.anchors[1] - layout.vds_size;
last_lba = layout.vds2 - 1; /* XXX -1 ?? */
}
/* reserve space for logvol integrity sequence */
layout.lvis_size = MAX(8192/sector_size, 2 * blockingnr);
if (format_flags & FORMAT_VAT)
layout.lvis_size = 2;
if (format_flags & FORMAT_WORM)
layout.lvis_size = 64 * blockingnr;
/* TODO skip bad blocks in LVID sequence; for now use f.e. */
//first_lba+=128;
layout.lvis = first_lba;
first_lba += layout.lvis_size;
/* initial guess of UDF partition size */
layout.part_start_lba = first_lba;
layout.part_size_lba = last_lba - layout.part_start_lba;
/* all non sequential media needs an unallocated space bitmap */
layout.alloc_bitmap_dscr_size = 0;
if ((format_flags & (FORMAT_SEQUENTIAL | FORMAT_READONLY)) == 0) {
bytes = udf_space_bitmap_len(layout.part_size_lba);
layout.alloc_bitmap_dscr_size = udf_bytes_to_sectors(bytes);
/* XXX freed space map when applicable */
}
/*
* Note that for (bug) compatibility with version UDF 2.00 (fixed in
* 2.01 and higher) the blocking size needs to be 32 sectors otherwise
* the drive's blockingnr.
*/
sparable_blockingnr = blockingnr;
if (min_udf <= 0x200)
sparable_blockingnr = 32;
align_blockingnr = blockingnr;
if (format_flags & (FORMAT_SPARABLE | FORMAT_META))
align_blockingnr = sparable_blockingnr;
layout.align_blockingnr = align_blockingnr;
layout.sparable_blockingnr = sparable_blockingnr;
/*
* Align partition LBA space to blocking granularity. Not strickly
* nessisary for non sparables but safer for the VRS data since it is
* not updated sporadically
*/
if ((format_flags & (FORMAT_SEQUENTIAL | FORMAT_READONLY)) == 0) {
#ifdef DEBUG
printf("Lost %d slack sectors at start\n", UDF_ROUNDUP(
first_lba - wrtrack_skew, align_blockingnr) -
(first_lba - wrtrack_skew));
printf("Lost %d slack sectors at end\n",
(first_lba - wrtrack_skew) - UDF_ROUNDDOWN(
first_lba - wrtrack_skew, align_blockingnr));
#endif
first_lba = UDF_ROUNDUP( first_lba - wrtrack_skew,
align_blockingnr);
last_lba = UDF_ROUNDDOWN(last_lba - wrtrack_skew,
align_blockingnr);
}
if ((format_flags & FORMAT_SPARABLE) == 0)
layout.sparable_blocks = 0;
if (format_flags & FORMAT_SPARABLE) {
layout.sparable_area_size =
layout.sparable_blocks * sparable_blockingnr;
/* a sparing table descriptor is a whole blockingnr sectors */
layout.sparing_table_dscr_lbas = sparable_blockingnr;
/* place the descriptors at the start and end of the area */
layout.spt_1 = first_lba;
first_lba += layout.sparing_table_dscr_lbas;
layout.spt_2 = last_lba - layout.sparing_table_dscr_lbas;
last_lba -= layout.sparing_table_dscr_lbas;
/* allocate sparable section */
layout.sparable_area = first_lba;
first_lba += layout.sparable_area_size;
}
/* update guess of UDF partition size */
layout.part_start_lba = first_lba;
layout.part_size_lba = last_lba - layout.part_start_lba;
/* determine partition selection for data and metadata */
context.data_part = 0;
context.metadata_part = context.data_part;
if ((format_flags & FORMAT_VAT) || (format_flags & FORMAT_META))
context.metadata_part = context.data_part + 1;
/*
* Pick fixed logical space sector numbers for main FSD, rootdir and
* unallocated space. The reason for this pre-allocation is that they
* are referenced in the volume descriptor sequence and hence can't be
* allocated later.
*/
pos = 0;
layout.unalloc_space = pos;
pos += layout.alloc_bitmap_dscr_size;
/* claim metadata descriptors and partition space [UDF 2.2.10] */
if (format_flags & FORMAT_META) {
/* note: all in backing partition space */
layout.meta_file = pos++;
layout.meta_bitmap = pos++;;
layout.meta_mirror = layout.part_size_lba-1;
layout.meta_alignment = MAX(blockingnr, sparable_blockingnr);
layout.meta_blockingnr = MAX(layout.meta_alignment, 32);
/* calculate our partition length and store in sectors */
layout.meta_part_size_lba = layout.part_size_lba * meta_fract;
layout.meta_part_size_lba = MAX(layout.meta_part_size_lba, 32);
layout.meta_part_size_lba =
UDF_ROUNDDOWN(layout.meta_part_size_lba, layout.meta_blockingnr);
/* calculate positions */
bytes = udf_space_bitmap_len(layout.meta_part_size_lba);
layout.meta_bitmap_dscr_size = udf_bytes_to_sectors(bytes);
layout.meta_bitmap_space = pos;
pos += layout.meta_bitmap_dscr_size;
layout.meta_part_start_lba = UDF_ROUNDUP(pos, layout.meta_alignment);
}
mpos = (context.metadata_part == context.data_part) ? pos : 0;
layout.fsd = mpos; mpos += 1;
layout.rootdir = mpos; mpos += 1;
layout.vat = mpos; mpos += 1; /* if present */
#if 0
printf("Summary so far\n");
printf("\tiso9660_vrs\t\t%d\n", layout.iso9660_vrs);
printf("\tanchor0\t\t\t%d\n", layout.anchors[0]);
printf("\tanchor1\t\t\t%d\n", layout.anchors[1]);
printf("\tanchor2\t\t\t%d\n", layout.anchors[2]);
printf("\tvds_size\t\t%d\n", layout.vds_size);
printf("\tvds1\t\t\t%d\n", layout.vds1);
printf("\tvds2\t\t\t%d\n", layout.vds2);
printf("\tlvis_size\t\t%d\n", layout.lvis_size);
printf("\tlvis\t\t\t%d\n", layout.lvis);
if (format_flags & FORMAT_SPARABLE) {
printf("\tsparable size\t\t%d\n", layout.sparable_area_size);
printf("\tsparable\t\t%d\n", layout.sparable_area);
}
printf("\tpartition start lba\t%d\n", layout.part_start_lba);
printf("\tpartition size\t\t%d KiB, %d MiB\n",
(layout.part_size_lba * sector_size) / 1024,
(layout.part_size_lba * sector_size) / (1024*1024));
if ((format_flags & FORMAT_SEQUENTIAL) == 0) {
printf("\tpart bitmap start\t%d\n", layout.unalloc_space);
printf("\t\tfor %d lba\n", layout.alloc_bitmap_dscr_size);
}
if (format_flags & FORMAT_META) {
printf("\tmeta blockingnr\t\t%d\n", layout.meta_blockingnr);
printf("\tmeta alignment\t\t%d\n", layout.meta_alignment);
printf("\tmeta size\t\t%d KiB, %d MiB\n",
(layout.meta_part_size_lba * sector_size) / 1024,
(layout.meta_part_size_lba * sector_size) / (1024*1024));
printf("\tmeta file\t\t%d\n", layout.meta_file);
printf("\tmeta mirror\t\t%d\n", layout.meta_mirror);
printf("\tmeta bitmap\t\t%d\n", layout.meta_bitmap);
printf("\tmeta bitmap start\t%d\n", layout.meta_bitmap_space);
printf("\t\tfor %d lba\n", layout.meta_bitmap_dscr_size);
printf("\tmeta space start\t%d\n", layout.meta_part_start_lba);
printf("\t\tfor %d lba\n", layout.meta_part_size_lba);
}
printf("\n");
#endif
kbsize = (uint64_t) last_lba * sector_size;
printf("Total space on this medium approx. "
"%"PRIu64" KiB, %"PRIu64" MiB\n",
kbsize/1024, kbsize/(1024*1024));
kbsize = (uint64_t)(layout.part_size_lba - layout.alloc_bitmap_dscr_size
- layout.meta_bitmap_dscr_size) * sector_size;
printf("Free space on this volume approx. "
"%"PRIu64" KiB, %"PRIu64" MiB\n\n",
kbsize/1024, kbsize/(1024*1024));
return 0;
}
int
udf_validate_tag_sum(union dscrptr *dscr)
{
struct desc_tag *tag = &dscr->tag;
uint8_t *pos, sum, cnt;
/* calculate TAG header checksum */
pos = (uint8_t *) tag;
sum = 0;
for(cnt = 0; cnt < 16; cnt++) {
if (cnt != 4) sum += *pos;
pos++;
};
tag->cksum = sum; /* 8 bit */
return 0;
}
/* assumes sector number of descriptor to be allready present */
int
udf_validate_tag_and_crc_sums(union dscrptr *dscr)
{
struct desc_tag *tag = &dscr->tag;
uint16_t crc;
/* check payload CRC if applicable */
if (udf_rw16(tag->desc_crc_len) > 0) {
crc = udf_cksum(((uint8_t *) tag) + UDF_DESC_TAG_LENGTH,
udf_rw16(tag->desc_crc_len));
tag->desc_crc = udf_rw16(crc);
};
/* calculate TAG header checksum */
return udf_validate_tag_sum(dscr);
}
void
udf_inittag(struct desc_tag *tag, int tagid, uint32_t loc)
{
tag->id = udf_rw16(tagid);
tag->descriptor_ver = udf_rw16(context.dscrver);
tag->cksum = 0;
tag->reserved = 0;
tag->serial_num = udf_rw16(context.serialnum);
tag->tag_loc = udf_rw32(loc);
}
int
udf_create_anchor(int num)
{
struct anchor_vdp *avdp;
uint32_t vds_extent_len = layout.vds_size * context.sector_size;
if ((avdp = calloc(1, context.sector_size)) == NULL)
return ENOMEM;
udf_inittag(&avdp->tag, TAGID_ANCHOR, layout.anchors[num]);
avdp->main_vds_ex.loc = udf_rw32(layout.vds1);
avdp->main_vds_ex.len = udf_rw32(vds_extent_len);
avdp->reserve_vds_ex.loc = udf_rw32(layout.vds2);
avdp->reserve_vds_ex.len = udf_rw32(vds_extent_len);
/* CRC length for an anchor is 512 - tag length; defined in Ecma 167 */
avdp->tag.desc_crc_len = udf_rw16(512-UDF_DESC_TAG_LENGTH);
context.anchors[num] = avdp;
return 0;
}
void
udf_create_terminator(union dscrptr *dscr, uint32_t loc)
{
memset(dscr, 0, context.sector_size);
udf_inittag(&dscr->tag, TAGID_TERM, loc);
/* CRC length for an anchor is 512 - tag length; defined in Ecma 167 */
dscr->tag.desc_crc_len = udf_rw16(512-UDF_DESC_TAG_LENGTH);
}
void
udf_osta_charset(struct charspec *charspec)
{
memset(charspec, 0, sizeof(*charspec));
charspec->type = 0;
strcpy((char *) charspec->inf, "OSTA Compressed Unicode");
}
void
udf_encode_osta_id(char *osta_id, uint16_t len, char *text)
{
uint16_t u16_name[1024];
uint8_t *pos;
uint16_t *pos16;
memset(osta_id, 0, len);
if (!text || (strlen(text) == 0)) return;
memset(u16_name, 0, sizeof(uint16_t) * 1023);
/* convert ascii to 16 bits unicode */
pos = (uint8_t *) text;
pos16 = u16_name;
while (*pos) {
*pos16 = *pos;
pos++; pos16++;
};
*pos16 = 0;
udf_CompressUnicode(len, 8, (unicode_t *) u16_name, (byte *) osta_id);
/* Ecma 167/7.2.13 states that length is recorded in the last byte */
osta_id[len-1] = strlen(text)+1;
}
/* first call udf_set_regid and then the suffix */
void
udf_set_regid(struct regid *regid, char const *name)
{
memset(regid, 0, sizeof(*regid));
regid->flags = 0; /* not dirty and not protected */
strcpy((char *) regid->id, name);
}
void
udf_add_domain_regid(struct regid *regid)
{
uint16_t *ver;
ver = (uint16_t *) regid->id_suffix;
*ver = udf_rw16(context.min_udf);
}
void
udf_add_udf_regid(struct regid *regid)
{
uint16_t *ver;
ver = (uint16_t *) regid->id_suffix;
*ver = udf_rw16(context.min_udf);
regid->id_suffix[2] = 4; /* unix */
regid->id_suffix[3] = 8; /* NetBSD */
}
void
udf_add_impl_regid(struct regid *regid)
{
regid->id_suffix[0] = 4; /* unix */
regid->id_suffix[1] = 8; /* NetBSD */
}
void
udf_add_app_regid(struct regid *regid)
{
regid->id_suffix[0] = context.app_version_main;
regid->id_suffix[1] = context.app_version_sub;
}
/*
* Fill in timestamp structure based on clock_gettime(). Time is reported back
* as a time_t accompanied with a nano second field.
*
* The husec, usec and csec could be relaxed in type.
*/
static void
udf_timespec_to_timestamp(struct timespec *timespec, struct timestamp *timestamp)
{
struct tm tm;
uint64_t husec, usec, csec;
memset(timestamp, 0, sizeof(*timestamp));
gmtime_r(&timespec->tv_sec, &tm);
/*
* Time type and time zone : see ECMA 1/7.3, UDF 2., 2.1.4.1, 3.1.1.
*
* Lower 12 bits are two complement signed timezone offset if bit 12
* (method 1) is clear. Otherwise if bit 12 is set, specify timezone
* offset to -2047 i.e. unsigned `zero'
*/
/* set method 1 for CUT/GMT */
timestamp->type_tz = udf_rw16((1<<12) + 0);
timestamp->year = udf_rw16(tm.tm_year + 1900);
timestamp->month = tm.tm_mon + 1; /* `tm' uses 0..11 for months */
timestamp->day = tm.tm_mday;
timestamp->hour = tm.tm_hour;
timestamp->minute = tm.tm_min;
timestamp->second = tm.tm_sec;
usec = (timespec->tv_nsec + 500) / 1000; /* round */
husec = usec / 100;
usec -= husec * 100; /* only 0-99 in usec */
csec = husec / 100; /* only 0-99 in csec */
husec -= csec * 100; /* only 0-99 in husec */
/* in rare cases there is overflow in csec */
csec = MIN(99, csec);
husec = MIN(99, husec);
usec = MIN(99, usec);
timestamp->centisec = csec;
timestamp->hund_usec = husec;
timestamp->usec = usec;
}
void
udf_set_timestamp_now(struct timestamp *timestamp)
{
struct timespec now;
#ifdef CLOCK_REALTIME
(void)clock_gettime(CLOCK_REALTIME, &now);
#else
struct timeval time_of_day;
(void)gettimeofday(&time_of_day, NULL);
now.tv_sec = time_of_day.tv_sec;
now.tv_nsec = time_of_day.tv_usec * 1000;
#endif
udf_timespec_to_timestamp(&now, timestamp);
}
/* some code copied from sys/fs/udf */
static void
udf_set_timestamp(struct timestamp *timestamp, time_t value)
{
struct timespec t;
memset(&t, 0, sizeof(struct timespec));
t.tv_sec = value;
t.tv_nsec = 0;
udf_timespec_to_timestamp(&t, timestamp);
}
static uint32_t
unix_mode_to_udf_perm(mode_t mode)
{
uint32_t perm;
perm = ((mode & S_IRWXO) );
perm |= ((mode & S_IRWXG) << 2);
perm |= ((mode & S_IRWXU) << 4);
perm |= ((mode & S_IWOTH) << 3);
perm |= ((mode & S_IWGRP) << 5);
perm |= ((mode & S_IWUSR) << 7);
return perm;
}
/* end of copied code */
int
udf_create_primaryd(void)
{
struct pri_vol_desc *pri;
uint16_t crclen;
pri = calloc(1, context.sector_size);
if (pri == NULL)
return ENOMEM;
memset(pri, 0, context.sector_size);
udf_inittag(&pri->tag, TAGID_PRI_VOL, /* loc */ 0);
pri->seq_num = udf_rw32(context.vds_seq); context.vds_seq++;
pri->pvd_num = udf_rw32(0); /* default serial */
udf_encode_osta_id(pri->vol_id, 32, context.primary_name);
/* set defaults for single disc volumes as UDF prescribes */
pri->vds_num = udf_rw16(1);
pri->max_vol_seq = udf_rw16(1);
pri->ichg_lvl = udf_rw16(2);
pri->max_ichg_lvl = udf_rw16(3);
pri->flags = udf_rw16(0);
pri->charset_list = udf_rw32(1); /* only CS0 */
pri->max_charset_list = udf_rw32(1); /* only CS0 */
udf_encode_osta_id(pri->volset_id, 128, context.volset_name);
udf_osta_charset(&pri->desc_charset);
udf_osta_charset(&pri->explanatory_charset);
udf_set_regid(&pri->app_id, context.app_name);
udf_add_app_regid(&pri->app_id);
udf_set_regid(&pri->imp_id, context.impl_name);
udf_add_impl_regid(&pri->imp_id);
udf_set_timestamp_now(&pri->time);
crclen = sizeof(struct pri_vol_desc) - UDF_DESC_TAG_LENGTH;
pri->tag.desc_crc_len = udf_rw16(crclen);
context.primary_vol = pri;
return 0;
}
/* XXX no support for unallocated or freed space tables yet (!) */
int
udf_create_partitiond(int part_num, int part_accesstype)
{
struct part_desc *pd;
struct part_hdr_desc *phd;
uint32_t sector_size, bitmap_bytes;
uint16_t crclen;
sector_size = context.sector_size;
bitmap_bytes = layout.alloc_bitmap_dscr_size * sector_size;
if (context.partitions[part_num]) {
printf("Internal error: partition %d allready defined\n",
part_num);
return EINVAL;
}
pd = calloc(1, context.sector_size);
if (pd == NULL)
return ENOMEM;
phd = &pd->_impl_use.part_hdr;
udf_inittag(&pd->tag, TAGID_PARTITION, /* loc */ 0);
pd->seq_num = udf_rw32(context.vds_seq); context.vds_seq++;
pd->flags = udf_rw16(1); /* allocated */
pd->part_num = udf_rw16(part_num); /* only one physical partition */
if (context.dscrver == 2) {
udf_set_regid(&pd->contents, "+NSR02");
} else {
udf_set_regid(&pd->contents, "+NSR03");
}
udf_add_app_regid(&pd->contents);
phd->unalloc_space_bitmap.len = udf_rw32(bitmap_bytes);
phd->unalloc_space_bitmap.lb_num = udf_rw32(layout.unalloc_space);
if (layout.freed_space) {
phd->freed_space_bitmap.len = udf_rw32(bitmap_bytes);
phd->freed_space_bitmap.lb_num = udf_rw32(layout.freed_space);
}
pd->access_type = udf_rw32(part_accesstype);
pd->start_loc = udf_rw32(layout.part_start_lba);
pd->part_len = udf_rw32(layout.part_size_lba);
udf_set_regid(&pd->imp_id, context.impl_name);
udf_add_impl_regid(&pd->imp_id);
crclen = sizeof(struct part_desc) - UDF_DESC_TAG_LENGTH;
pd->tag.desc_crc_len = udf_rw16(crclen);
context.partitions[part_num] = pd;
return 0;
}
int
udf_create_unalloc_spaced(void)
{
struct unalloc_sp_desc *usd;
uint16_t crclen;
usd = calloc(1, context.sector_size);
if (usd == NULL)
return ENOMEM;
udf_inittag(&usd->tag, TAGID_UNALLOC_SPACE, /* loc */ 0);
usd->seq_num = udf_rw32(context.vds_seq); context.vds_seq++;
/* no default entries */
usd->alloc_desc_num = udf_rw32(0); /* no entries */
crclen = sizeof(struct unalloc_sp_desc) - sizeof(struct extent_ad);
crclen -= UDF_DESC_TAG_LENGTH;
usd->tag.desc_crc_len = udf_rw16(crclen);
context.unallocated = usd;
return 0;
}
static int
udf_create_base_logical_dscr(void)
{
struct logvol_desc *lvd;
uint32_t sector_size;
uint16_t crclen;
sector_size = context.sector_size;
lvd = calloc(1, sector_size);
if (lvd == NULL)
return ENOMEM;
udf_inittag(&lvd->tag, TAGID_LOGVOL, /* loc */ 0);
lvd->seq_num = udf_rw32(context.vds_seq); context.vds_seq++;
udf_osta_charset(&lvd->desc_charset);
udf_encode_osta_id(lvd->logvol_id, 128, context.logvol_name);
lvd->lb_size = udf_rw32(context.sector_size);
udf_set_regid(&lvd->domain_id, "*OSTA UDF Compliant");
udf_add_domain_regid(&lvd->domain_id);
/* no partition mappings/entries yet */
lvd->mt_l = udf_rw32(0);
lvd->n_pm = udf_rw32(0);
udf_set_regid(&lvd->imp_id, context.impl_name);
udf_add_impl_regid(&lvd->imp_id);
lvd->integrity_seq_loc.loc = udf_rw32(layout.lvis);
lvd->integrity_seq_loc.len = udf_rw32(layout.lvis_size * sector_size);
/* just one fsd for now */
lvd->lv_fsd_loc.len = udf_rw32(sector_size);
lvd->lv_fsd_loc.loc.part_num = udf_rw32(context.metadata_part);
lvd->lv_fsd_loc.loc.lb_num = udf_rw32(layout.fsd);
crclen = sizeof(struct logvol_desc) - 1 - UDF_DESC_TAG_LENGTH;
lvd->tag.desc_crc_len = udf_rw16(crclen);
context.logical_vol = lvd;
context.vtop_tp[UDF_VTOP_RAWPART] = UDF_VTOP_TYPE_RAW;
context.vtop_offset[UDF_VTOP_RAWPART] = 0;
return 0;
}
static void
udf_add_logvol_part_physical(uint16_t phys_part)
{
struct logvol_desc *logvol = context.logical_vol;
union udf_pmap *pmap;
uint8_t *pmap_pos;
uint16_t crclen;
uint32_t pmap1_size, log_part;
log_part = udf_rw32(logvol->n_pm);
pmap_pos = logvol->maps + udf_rw32(logvol->mt_l);
pmap1_size = sizeof(struct part_map_1);
pmap = (union udf_pmap *) pmap_pos;
pmap->pm1.type = 1;
pmap->pm1.len = sizeof(struct part_map_1);
pmap->pm1.vol_seq_num = udf_rw16(1); /* no multi-volume */
pmap->pm1.part_num = udf_rw16(phys_part);
context.vtop [log_part] = phys_part;
context.vtop_tp [log_part] = UDF_VTOP_TYPE_PHYS;
context.vtop_offset[log_part] = layout.part_start_lba;
context.part_size[log_part] = layout.part_size_lba;
context.part_free[log_part] = layout.part_size_lba;
/* increment number of partitions and length */
logvol->n_pm = udf_rw32(log_part + 1);
logvol->mt_l = udf_rw32(udf_rw32(logvol->mt_l) + pmap1_size);
crclen = udf_rw16(logvol->tag.desc_crc_len) + pmap1_size;
logvol->tag.desc_crc_len = udf_rw16(crclen);
}
static void
udf_add_logvol_part_virtual(uint16_t phys_part)
{
union udf_pmap *pmap;
struct logvol_desc *logvol = context.logical_vol;
uint8_t *pmap_pos;
uint16_t crclen;
uint32_t pmapv_size, log_part;
log_part = udf_rw32(logvol->n_pm);
pmap_pos = logvol->maps + udf_rw32(logvol->mt_l);
pmapv_size = sizeof(struct part_map_2);
pmap = (union udf_pmap *) pmap_pos;
pmap->pmv.type = 2;
pmap->pmv.len = pmapv_size;
udf_set_regid(&pmap->pmv.id, "*UDF Virtual Partition");
udf_add_udf_regid(&pmap->pmv.id);
pmap->pmv.vol_seq_num = udf_rw16(1); /* no multi-volume */
pmap->pmv.part_num = udf_rw16(phys_part);
context.vtop [log_part] = phys_part;
context.vtop_tp [log_part] = UDF_VTOP_TYPE_VIRT;
context.vtop_offset[log_part] = context.vtop_offset[phys_part];
context.part_size[log_part] = 0xffffffff;
context.part_free[log_part] = 0xffffffff;
/* increment number of partitions and length */
logvol->n_pm = udf_rw32(log_part + 1);
logvol->mt_l = udf_rw32(udf_rw32(logvol->mt_l) + pmapv_size);
crclen = udf_rw16(logvol->tag.desc_crc_len) + pmapv_size;
logvol->tag.desc_crc_len = udf_rw16(crclen);
}
/* sparing table size is in bytes */
static void
udf_add_logvol_part_sparable(uint16_t phys_part)
{
union udf_pmap *pmap;
struct logvol_desc *logvol = context.logical_vol;
uint32_t *st_pos, sparable_bytes, pmaps_size;
uint8_t *pmap_pos, num;
uint16_t crclen;
uint32_t log_part;
log_part = udf_rw32(logvol->n_pm);
pmap_pos = logvol->maps + udf_rw32(logvol->mt_l);
pmaps_size = sizeof(struct part_map_2);
sparable_bytes = layout.sparable_area_size * context.sector_size;
pmap = (union udf_pmap *) pmap_pos;
pmap->pms.type = 2;
pmap->pms.len = pmaps_size;
udf_set_regid(&pmap->pmv.id, "*UDF Sparable Partition");
udf_add_udf_regid(&pmap->pmv.id);
pmap->pms.vol_seq_num = udf_rw16(1); /* no multi-volume */
pmap->pms.part_num = udf_rw16(phys_part);
pmap->pms.packet_len = udf_rw16(layout.sparable_blockingnr);
pmap->pms.st_size = udf_rw32(sparable_bytes);
/* enter spare tables */
st_pos = &pmap->pms.st_loc[0];
*st_pos++ = udf_rw32(layout.spt_1);
*st_pos++ = udf_rw32(layout.spt_2);
num = 2;
if (layout.spt_2 == 0) num--;
if (layout.spt_1 == 0) num--;
pmap->pms.n_st = num; /* 8 bit */
/* the vtop_offset needs to explicitly set since there is no phys. */
context.vtop [log_part] = phys_part;
context.vtop_tp [log_part] = UDF_VTOP_TYPE_SPARABLE;
context.vtop_offset[log_part] = layout.part_start_lba;
context.part_size[log_part] = layout.part_size_lba;
context.part_free[log_part] = layout.part_size_lba;
/* increment number of partitions and length */
logvol->n_pm = udf_rw32(log_part + 1);
logvol->mt_l = udf_rw32(udf_rw32(logvol->mt_l) + pmaps_size);
crclen = udf_rw16(logvol->tag.desc_crc_len) + pmaps_size;
logvol->tag.desc_crc_len = udf_rw16(crclen);
}
int
udf_create_sparing_tabled(void)
{
struct udf_sparing_table *spt;
struct spare_map_entry *sme;
uint32_t loc, cnt;
uint32_t crclen; /* XXX: should be 16; need to detect overflow */
spt = calloc(context.sector_size, layout.sparing_table_dscr_lbas);
if (spt == NULL)
return ENOMEM;
/* a sparing table descriptor is a whole sparable_blockingnr sectors */
udf_inittag(&spt->tag, TAGID_SPARING_TABLE, /* loc */ 0);
udf_set_regid(&spt->id, "*UDF Sparing Table");
udf_add_udf_regid(&spt->id);
spt->rt_l = udf_rw16(layout.sparable_blocks);
spt->seq_num = udf_rw32(0); /* first generation */
for (cnt = 0; cnt < layout.sparable_blocks; cnt++) {
sme = &spt->entries[cnt];
loc = layout.sparable_area + cnt * layout.sparable_blockingnr;
sme->org = udf_rw32(0xffffffff); /* open for reloc */
sme->map = udf_rw32(loc);
}
/* calculate crc len for actual size */
crclen = sizeof(struct udf_sparing_table) - UDF_DESC_TAG_LENGTH;
crclen += (layout.sparable_blocks-1) * sizeof(struct spare_map_entry);
/* XXX ensure crclen doesn't exceed UINT16_MAX ? */
spt->tag.desc_crc_len = udf_rw16((uint16_t)crclen);
context.sparing_table = spt;
return 0;
}
static void
udf_add_logvol_part_meta(uint16_t phys_part)
{
union udf_pmap *pmap;
struct logvol_desc *logvol = context.logical_vol;
uint8_t *pmap_pos;
uint32_t pmapv_size, log_part;
uint16_t crclen;
log_part = udf_rw32(logvol->n_pm);
pmap_pos = logvol->maps + udf_rw32(logvol->mt_l);
pmapv_size = sizeof(struct part_map_2);
pmap = (union udf_pmap *) pmap_pos;
pmap->pmm.type = 2;
pmap->pmm.len = pmapv_size;
udf_set_regid(&pmap->pmm.id, "*UDF Metadata Partition");
udf_add_udf_regid(&pmap->pmm.id);
pmap->pmm.vol_seq_num = udf_rw16(1); /* no multi-volume */
pmap->pmm.part_num = udf_rw16(phys_part);
/* fill in meta data file(s) and alloc/alignment unit sizes */
pmap->pmm.meta_file_lbn = udf_rw32(layout.meta_file);
pmap->pmm.meta_mirror_file_lbn = udf_rw32(layout.meta_mirror);
pmap->pmm.meta_bitmap_file_lbn = udf_rw32(layout.meta_bitmap);
pmap->pmm.alloc_unit_size = udf_rw32(layout.meta_blockingnr);
pmap->pmm.alignment_unit_size = udf_rw16(layout.meta_alignment);
pmap->pmm.flags = 0; /* METADATA_DUPLICATED */
context.vtop [log_part] = phys_part;
context.vtop_tp [log_part] = UDF_VTOP_TYPE_META;
context.vtop_offset[log_part] =
context.vtop_offset[phys_part] + layout.meta_part_start_lba;
context.part_size[log_part] = layout.meta_part_size_lba;
context.part_free[log_part] = layout.meta_part_size_lba;
/* increment number of partitions and length */
logvol->n_pm = udf_rw32(log_part + 1);
logvol->mt_l = udf_rw32(udf_rw32(logvol->mt_l) + pmapv_size);
crclen = udf_rw16(logvol->tag.desc_crc_len) + pmapv_size;
logvol->tag.desc_crc_len = udf_rw16(crclen);
}
int
udf_create_logical_dscr(int format_flags)
{
int error;
if ((error = udf_create_base_logical_dscr()))
return error;
/* we pass data_part for there might be a read-only part one day */
if (format_flags & FORMAT_SPARABLE) {
/* sparable partition mapping has no physical mapping */
udf_add_logvol_part_sparable(context.data_part);
} else {
udf_add_logvol_part_physical(context.data_part);
}
if (format_flags & FORMAT_VAT) {
/* add VAT virtual mapping; reflects on datapart */
udf_add_logvol_part_virtual(context.data_part);
}
if (format_flags & FORMAT_META) {
/* add META data mapping; reflects on datapart */
udf_add_logvol_part_meta(context.data_part);
}
return 0;
}
int
udf_create_impvold(char *field1, char *field2, char *field3)
{
struct impvol_desc *ivd;
struct udf_lv_info *lvi;
uint16_t crclen;
ivd = calloc(1, context.sector_size);
if (ivd == NULL)
return ENOMEM;
lvi = &ivd->_impl_use.lv_info;
udf_inittag(&ivd->tag, TAGID_IMP_VOL, /* loc */ 0);
ivd->seq_num = udf_rw32(context.vds_seq); context.vds_seq++;
udf_set_regid(&ivd->impl_id, "*UDF LV Info");
udf_add_udf_regid(&ivd->impl_id);
/* fill in UDF specific part */
udf_osta_charset(&lvi->lvi_charset);
udf_encode_osta_id(lvi->logvol_id, 128, context.logvol_name);
udf_encode_osta_id(lvi->lvinfo1, 36, field1);
udf_encode_osta_id(lvi->lvinfo2, 36, field2);
udf_encode_osta_id(lvi->lvinfo3, 36, field3);
udf_set_regid(&lvi->impl_id, context.impl_name);
udf_add_impl_regid(&lvi->impl_id);
crclen = sizeof(struct impvol_desc) - UDF_DESC_TAG_LENGTH;
ivd->tag.desc_crc_len = udf_rw16(crclen);
context.implementation = ivd;
return 0;
}
/* XXX might need to be sanitised a bit later */
void
udf_update_lvintd(int type)
{
struct logvol_int_desc *lvid;
struct udf_logvol_info *lvinfo;
struct logvol_desc *logvol;
uint32_t *pos;
uint32_t cnt, l_iu, num_partmappings;
uint32_t crclen; /* XXX: should be 16; need to detect overflow */
lvid = context.logvol_integrity;
logvol = context.logical_vol;
assert(lvid);
assert(logvol);
lvid->integrity_type = udf_rw32(type);
num_partmappings = udf_rw32(logvol->n_pm);
udf_set_timestamp_now(&lvid->time);
lvinfo = (struct udf_logvol_info *)
(lvid->tables + num_partmappings * 2);
udf_set_regid(&lvinfo->impl_id, context.impl_name);
udf_add_impl_regid(&lvinfo->impl_id);
lvinfo->num_files = udf_rw32(context.num_files);
lvinfo->num_directories = udf_rw32(context.num_directories);
lvid->lvint_next_unique_id = udf_rw64(context.unique_id);
/* XXX sane enough ? */
lvinfo->min_udf_readver = udf_rw16(context.min_udf);
lvinfo->min_udf_writever = udf_rw16(context.min_udf);
lvinfo->max_udf_writever = udf_rw16(context.max_udf);
lvid->num_part = udf_rw32(num_partmappings);
/* no impl. use needed */
l_iu = sizeof(struct udf_logvol_info);
lvid->l_iu = udf_rw32(l_iu);
pos = &lvid->tables[0];
for (cnt = 0; cnt < num_partmappings; cnt++) {
*pos++ = udf_rw32(context.part_free[cnt]);
}
for (cnt = 0; cnt < num_partmappings; cnt++) {
*pos++ = udf_rw32(context.part_size[cnt]);
}
crclen = sizeof(struct logvol_int_desc) -4 -UDF_DESC_TAG_LENGTH + l_iu;
crclen += num_partmappings * 2 * 4;
/* XXX ensure crclen doesn't exceed UINT16_MAX ? */
lvid->tag.desc_crc_len = udf_rw16(crclen);
context.logvol_info = lvinfo;
}
int
udf_create_lvintd(int type)
{
struct logvol_int_desc *lvid;
lvid = calloc(1, context.sector_size);
if (lvid == NULL)
return ENOMEM;
udf_inittag(&lvid->tag, TAGID_LOGVOL_INTEGRITY, /* loc */ 0);
context.logvol_integrity = lvid;
udf_update_lvintd(type);
return 0;
}
int
udf_create_fsd(void)
{
struct fileset_desc *fsd;
uint16_t crclen;
fsd = calloc(1, context.sector_size);
if (fsd == NULL)
return ENOMEM;
udf_inittag(&fsd->tag, TAGID_FSD, /* loc */ 0);
udf_set_timestamp_now(&fsd->time);
fsd->ichg_lvl = udf_rw16(3); /* UDF 2.3.2.1 */
fsd->max_ichg_lvl = udf_rw16(3); /* UDF 2.3.2.2 */
fsd->charset_list = udf_rw32(1); /* only CS0 */
fsd->max_charset_list = udf_rw32(1); /* only CS0 */
fsd->fileset_num = udf_rw32(0); /* only one fsd */
fsd->fileset_desc_num = udf_rw32(0); /* origional */
udf_osta_charset(&fsd->logvol_id_charset);
udf_encode_osta_id(fsd->logvol_id, 128, context.logvol_name);
udf_osta_charset(&fsd->fileset_charset);
udf_encode_osta_id(fsd->fileset_id, 32, context.fileset_name);
/* copyright file and abstract file names obmitted */
fsd->rootdir_icb.len = udf_rw32(context.sector_size);
fsd->rootdir_icb.loc.lb_num = udf_rw32(layout.rootdir);
fsd->rootdir_icb.loc.part_num = udf_rw16(context.metadata_part);
udf_set_regid(&fsd->domain_id, "*OSTA UDF Compliant");
udf_add_domain_regid(&fsd->domain_id);
/* next_ex stays zero */
/* no system streamdirs yet */
crclen = sizeof(struct fileset_desc) - UDF_DESC_TAG_LENGTH;
fsd->tag.desc_crc_len = udf_rw16(crclen);
context.fileset_desc = fsd;
return 0;
}
int
udf_create_space_bitmap(uint32_t dscr_size, uint32_t part_size_lba,
struct space_bitmap_desc **sbdp)
{
struct space_bitmap_desc *sbd;
uint32_t cnt;
uint16_t crclen;
*sbdp = NULL;
sbd = calloc(context.sector_size, dscr_size);
if (sbd == NULL)
return ENOMEM;
udf_inittag(&sbd->tag, TAGID_SPACE_BITMAP, /* loc */ 0);
sbd->num_bits = udf_rw32(part_size_lba);
sbd->num_bytes = udf_rw32((part_size_lba + 7)/8);
/* fill space with 0xff to indicate free */
for (cnt = 0; cnt < udf_rw32(sbd->num_bytes); cnt++)
sbd->data[cnt] = 0xff;
/* set crc to only cover the header (UDF 2.3.1.2, 2.3.8.1) */
crclen = sizeof(struct space_bitmap_desc) -1 - UDF_DESC_TAG_LENGTH;
sbd->tag.desc_crc_len = udf_rw16(crclen);
*sbdp = sbd;
return 0;
}
/* --------------------------------------------------------------------- */
int
udf_register_bad_block(uint32_t location)
{
struct udf_sparing_table *spt;
struct spare_map_entry *sme, *free_sme;
uint32_t cnt;
spt = context.sparing_table;
if (spt == NULL) {
printf("internal error: adding bad block to non sparable\n");
return EINVAL;
}
/* find us a free spare map entry */
free_sme = NULL;
for (cnt = 0; cnt < layout.sparable_blocks; cnt++) {
sme = &spt->entries[cnt];
/* if we are allready in it, bail out */
if (udf_rw32(sme->org) == location)
return 0;
if (udf_rw32(sme->org) == 0xffffffff) {
free_sme = sme;
break;
}
}
if (free_sme == NULL) {
printf("Disc relocation blocks full; disc too damanged\n");
return EINVAL;
}
free_sme->org = udf_rw32(location);
return 0;
}
void
udf_mark_allocated(uint32_t start_lb, int partnr, uint32_t blocks)
{
union dscrptr *dscr;
uint8_t *bpos;
uint32_t cnt, bit;
/* account for space used on underlying partition */
context.part_free[partnr] -= blocks;
#ifdef DEBUG
printf("mark allocated : partnr %d, start_lb %d for %d blocks\n",
partnr, start_lb, blocks);
#endif
switch (context.vtop_tp[partnr]) {
case UDF_VTOP_TYPE_VIRT:
/* nothing */
break;
case UDF_VTOP_TYPE_PHYS:
case UDF_VTOP_TYPE_SPARABLE:
case UDF_VTOP_TYPE_META:
if (context.part_unalloc_bits[context.vtop[partnr]] == NULL) {
context.part_free[partnr] = 0;
break;
}
#ifdef DEBUG
printf("Marking %d+%d as used\n", start_lb, blocks);
#endif
dscr = (union dscrptr *) (context.part_unalloc_bits[partnr]);
for (cnt = start_lb; cnt < start_lb + blocks; cnt++) {
bpos = &dscr->sbd.data[cnt / 8];
bit = cnt % 8;
*bpos &= ~(1<< bit);
}
break;
default:
printf("internal error: reality check in mapping type %d\n",
context.vtop_tp[partnr]);
exit(EXIT_FAILURE);
}
}
void
udf_advance_uniqueid(void)
{
/* Minimum value of 16 : UDF 3.2.1.1, 3.3.3.4. */
context.unique_id++;
if (context.unique_id < 0x10)
context.unique_id = 0x10;
}
/* --------------------------------------------------------------------- */
static void
unix_to_udf_name(char *result, uint8_t *result_len,
char const *name, int name_len, struct charspec *chsp)
{
uint16_t *raw_name;
uint16_t *outchp;
const char *inchp;
const char *osta_id = "OSTA Compressed Unicode";
int udf_chars, is_osta_typ0, bits;
size_t cnt;
/* allocate temporary unicode-16 buffer */
raw_name = malloc(1024);
assert(raw_name);
/* convert utf8 to unicode-16 */
*raw_name = 0;
inchp = name;
outchp = raw_name;
bits = 8;
for (cnt = name_len, udf_chars = 0; cnt;) {
*outchp = wget_utf8(&inchp, &cnt);
if (*outchp > 0xff)
bits=16;
outchp++;
udf_chars++;
}
/* null terminate just in case */
*outchp++ = 0;
is_osta_typ0 = (chsp->type == 0);
is_osta_typ0 &= (strcmp((char *) chsp->inf, osta_id) == 0);
if (is_osta_typ0) {
udf_chars = udf_CompressUnicode(udf_chars, bits,
(unicode_t *) raw_name,
(byte *) result);
} else {
printf("unix to udf name: no CHSP0 ?\n");
/* XXX assume 8bit char length byte latin-1 */
*result++ = 8; udf_chars = 1;
strncpy(result, name + 1, name_len);
udf_chars += name_len;
}
*result_len = udf_chars;
free(raw_name);
}
#define UDF_SYMLINKBUFLEN (64*1024) /* picked */
int
udf_encode_symlink(uint8_t **pathbufp, uint32_t *pathlenp, char *target)
{
struct charspec osta_charspec;
struct pathcomp pathcomp;
char *pathbuf, *pathpos, *compnamepos;
// char *mntonname;
// int mntonnamelen;
int pathlen, len, compnamelen;
int error;
/* process `target' to an UDF structure */
pathbuf = malloc(UDF_SYMLINKBUFLEN);
assert(pathbuf);
*pathbufp = NULL;
*pathlenp = 0;
pathpos = pathbuf;
pathlen = 0;
udf_osta_charset(&osta_charspec);
if (*target == '/') {
/* symlink starts from the root */
len = UDF_PATH_COMP_SIZE;
memset(&pathcomp, 0, len);
pathcomp.type = UDF_PATH_COMP_ROOT;
#if 0
/* XXX how to check for in makefs? */
/* check if its mount-point relative! */
mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname;
mntonnamelen = strlen(mntonname);
if (strlen(target) >= mntonnamelen) {
if (strncmp(target, mntonname, mntonnamelen) == 0) {
pathcomp.type = UDF_PATH_COMP_MOUNTROOT;
target += mntonnamelen;
}
} else {
target++;
}
#else
target++;
#endif
memcpy(pathpos, &pathcomp, len);
pathpos += len;
pathlen += len;
}
error = 0;
while (*target) {
/* ignore multiple '/' */
while (*target == '/') {
target++;
}
if (!*target)
break;
/* extract component name */
compnamelen = 0;
compnamepos = target;
while ((*target) && (*target != '/')) {
target++;
compnamelen++;
}
/* just trunc if too long ?? (security issue) */
if (compnamelen >= 127) {
error = ENAMETOOLONG;
break;
}
/* convert unix name to UDF name */
len = sizeof(struct pathcomp);
memset(&pathcomp, 0, len);
pathcomp.type = UDF_PATH_COMP_NAME;
len = UDF_PATH_COMP_SIZE;
if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0))
pathcomp.type = UDF_PATH_COMP_PARENTDIR;
if ((compnamelen == 1) && (*compnamepos == '.'))
pathcomp.type = UDF_PATH_COMP_CURDIR;
if (pathcomp.type == UDF_PATH_COMP_NAME) {
unix_to_udf_name(
(char *) &pathcomp.ident, &pathcomp.l_ci,
compnamepos, compnamelen,
&osta_charspec);
len = UDF_PATH_COMP_SIZE + pathcomp.l_ci;
}
if (pathlen + len >= UDF_SYMLINKBUFLEN) {
error = ENAMETOOLONG;
break;
}
memcpy(pathpos, &pathcomp, len);
pathpos += len;
pathlen += len;
}
if (error) {
/* aparently too big */
free(pathbuf);
return error;
}
/* return status of symlink contents writeout */
*pathbufp = (uint8_t *) pathbuf;
*pathlenp = pathlen;
return 0;
}
#undef UDF_SYMLINKBUFLEN
int
udf_fidsize(struct fileid_desc *fid)
{
uint32_t size;
if (udf_rw16(fid->tag.id) != TAGID_FID)
errx(EINVAL, "got udf_fidsize on non FID\n");
size = UDF_FID_SIZE + fid->l_fi + udf_rw16(fid->l_iu);
size = (size + 3) & ~3;
return size;
}
int
udf_create_parentfid(struct fileid_desc *fid, struct long_ad *parent)
{
/* the size of an empty FID is 38 but needs to be a multiple of 4 */
int fidsize = 40;
udf_inittag(&fid->tag, TAGID_FID, udf_rw32(parent->loc.lb_num));
fid->file_version_num = udf_rw16(1); /* UDF 2.3.4.1 */
fid->file_char = UDF_FILE_CHAR_DIR | UDF_FILE_CHAR_PAR;
fid->icb = *parent;
fid->icb.longad_uniqueid = parent->longad_uniqueid;
fid->tag.desc_crc_len = udf_rw16(fidsize - UDF_DESC_TAG_LENGTH);
/* we have to do the fid here explicitly for simplicity */
udf_validate_tag_and_crc_sums((union dscrptr *) fid);
return fidsize;
}
void
udf_create_fid(uint32_t diroff, struct fileid_desc *fid, char *name,
int file_char, struct long_ad *ref)
{
struct charspec osta_charspec;
uint32_t endfid;
uint32_t fidsize, lb_rest;
memset(fid, 0, sizeof(*fid));
udf_inittag(&fid->tag, TAGID_FID, udf_rw32(ref->loc.lb_num));
fid->file_version_num = udf_rw16(1); /* UDF 2.3.4.1 */
fid->file_char = file_char;
fid->l_iu = udf_rw16(0);
fid->icb = *ref;
fid->icb.longad_uniqueid = ref->longad_uniqueid;
udf_osta_charset(&osta_charspec);
unix_to_udf_name((char *) fid->data, &fid->l_fi, name, strlen(name),
&osta_charspec);
/*
* OK, tricky part: we need to pad so the next descriptor header won't
* cross the sector boundary
*/
endfid = diroff + udf_fidsize(fid);
lb_rest = context.sector_size - (endfid % context.sector_size);
if (lb_rest < sizeof(struct desc_tag)) {
/* add at least 32 */
fid->l_iu = udf_rw16(32);
udf_set_regid((struct regid *) fid->data, context.impl_name);
udf_add_impl_regid((struct regid *) fid->data);
unix_to_udf_name((char *) fid->data + udf_rw16(fid->l_iu),
&fid->l_fi, name, strlen(name), &osta_charspec);
}
fidsize = udf_fidsize(fid);
fid->tag.desc_crc_len = udf_rw16(fidsize - UDF_DESC_TAG_LENGTH);
/* make sure the header sums stays correct */
udf_validate_tag_and_crc_sums((union dscrptr *)fid);
}
static void
udf_append_parentfid(union dscrptr *dscr, struct long_ad *parent_icb)
{
struct file_entry *fe;
struct extfile_entry *efe;
struct fileid_desc *fid;
uint32_t l_ea;
uint32_t fidsize, crclen;
uint8_t *bpos, *data;
fe = NULL;
efe = NULL;
if (udf_rw16(dscr->tag.id) == TAGID_FENTRY) {
fe = &dscr->fe;
data = fe->data;
l_ea = udf_rw32(fe->l_ea);
} else if (udf_rw16(dscr->tag.id) == TAGID_EXTFENTRY) {
efe = &dscr->efe;
data = efe->data;
l_ea = udf_rw32(efe->l_ea);
} else {
errx(1, "Bad tag passed to udf_append_parentfid");
}
/* create '..' */
bpos = data + l_ea;
fid = (struct fileid_desc *) bpos;
fidsize = udf_create_parentfid(fid, parent_icb);
/* record fidlength information */
if (fe) {
fe->inf_len = udf_rw64(fidsize);
fe->l_ad = udf_rw32(fidsize);
fe->logblks_rec = udf_rw64(0); /* intern */
crclen = sizeof(struct file_entry);
} else {
efe->inf_len = udf_rw64(fidsize);
efe->obj_size = udf_rw64(fidsize);
efe->l_ad = udf_rw32(fidsize);
efe->logblks_rec = udf_rw64(0); /* intern */
crclen = sizeof(struct extfile_entry);
}
crclen -= 1 + UDF_DESC_TAG_LENGTH;
crclen += l_ea + fidsize;
dscr->tag.desc_crc_len = udf_rw16(crclen);
/* make sure the header sums stays correct */
udf_validate_tag_and_crc_sums(dscr);
}
/*
* Order of extended attributes :
* ECMA 167 EAs
* Non block aligned Implementation Use EAs
* Block aligned Implementation Use EAs (not in newfs_udf)
* Application Use EAs (not in newfs_udf)
*
* no checks for doubles, must be called in-order
*/
static void
udf_extattr_append_internal(union dscrptr *dscr, struct extattr_entry *extattr)
{
struct file_entry *fe;
struct extfile_entry *efe;
struct extattrhdr_desc *extattrhdr;
struct impl_extattr_entry *implext;
uint32_t impl_attr_loc, appl_attr_loc, l_ea, a_l, exthdr_len;
uint32_t *l_eap, l_ad;
uint16_t *spos;
uint8_t *bpos, *data;
if (udf_rw16(dscr->tag.id) == TAGID_FENTRY) {
fe = &dscr->fe;
data = fe->data;
l_eap = &fe->l_ea;
l_ad = udf_rw32(fe->l_ad);
} else if (udf_rw16(dscr->tag.id) == TAGID_EXTFENTRY) {
efe = &dscr->efe;
data = efe->data;
l_eap = &efe->l_ea;
l_ad = udf_rw32(efe->l_ad);
} else {
errx(1, "Bad tag passed to udf_extattr_append_internal");
}
/* should have a header! */
extattrhdr = (struct extattrhdr_desc *) data;
l_ea = udf_rw32(*l_eap);
if (l_ea == 0) {
assert(l_ad == 0);
/* create empty extended attribute header */
exthdr_len = sizeof(struct extattrhdr_desc);
udf_inittag(&extattrhdr->tag, TAGID_EXTATTR_HDR, /* loc */ 0);
extattrhdr->impl_attr_loc = udf_rw32(exthdr_len);
extattrhdr->appl_attr_loc = udf_rw32(exthdr_len);
extattrhdr->tag.desc_crc_len = udf_rw16(8);
/* record extended attribute header length */
l_ea = exthdr_len;
*l_eap = udf_rw32(l_ea);
}
/* extract locations */
impl_attr_loc = udf_rw32(extattrhdr->impl_attr_loc);
appl_attr_loc = udf_rw32(extattrhdr->appl_attr_loc);
if (impl_attr_loc == UDF_IMPL_ATTR_LOC_NOT_PRESENT)
impl_attr_loc = l_ea;
if (appl_attr_loc == UDF_IMPL_ATTR_LOC_NOT_PRESENT)
appl_attr_loc = l_ea;
/* Ecma 167 EAs */
if (udf_rw32(extattr->type) < 2048) {
assert(impl_attr_loc == l_ea);
assert(appl_attr_loc == l_ea);
}
/* implementation use extended attributes */
if (udf_rw32(extattr->type) == 2048) {
assert(appl_attr_loc == l_ea);
/* calculate and write extended attribute header checksum */
implext = (struct impl_extattr_entry *) extattr;
assert(udf_rw32(implext->iu_l) == 4); /* [UDF 3.3.4.5] */
spos = (uint16_t *) implext->data;
*spos = udf_rw16(udf_ea_cksum((uint8_t *) implext));
}
/* application use extended attributes */
assert(udf_rw32(extattr->type) != 65536);
assert(appl_attr_loc == l_ea);
/* append the attribute at the end of the current space */
bpos = data + udf_rw32(*l_eap);
a_l = udf_rw32(extattr->a_l);
/* update impl. attribute locations */
if (udf_rw32(extattr->type) < 2048) {
impl_attr_loc = l_ea + a_l;
appl_attr_loc = l_ea + a_l;
}
if (udf_rw32(extattr->type) == 2048) {
appl_attr_loc = l_ea + a_l;
}
/* copy and advance */
memcpy(bpos, extattr, a_l);
l_ea += a_l;
*l_eap = udf_rw32(l_ea);
/* do the `dance` again backwards */
if (context.dscrver != 2) {
if (impl_attr_loc == l_ea)
impl_attr_loc = UDF_IMPL_ATTR_LOC_NOT_PRESENT;
if (appl_attr_loc == l_ea)
appl_attr_loc = UDF_APPL_ATTR_LOC_NOT_PRESENT;
}
/* store offsets */
extattrhdr->impl_attr_loc = udf_rw32(impl_attr_loc);
extattrhdr->appl_attr_loc = udf_rw32(appl_attr_loc);
/* make sure the header sums stays correct */
udf_validate_tag_and_crc_sums((union dscrptr *) extattrhdr);
}
int
udf_create_new_fe(struct file_entry **fep, int file_type, struct stat *st)
{
struct file_entry *fe;
struct icb_tag *icb;
struct timestamp birthtime;
struct filetimes_extattr_entry *ft_extattr;
uint32_t crclen; /* XXX: should be 16; need to detect overflow */
uint16_t icbflags;
*fep = NULL;
fe = calloc(1, context.sector_size);
if (fe == NULL)
return ENOMEM;
udf_inittag(&fe->tag, TAGID_FENTRY, /* loc */ 0);
icb = &fe->icbtag;
/*
* Always use strategy type 4 unless on WORM wich we don't support
* (yet). Fill in defaults and set for internal allocation of data.
*/
icb->strat_type = udf_rw16(4);
icb->max_num_entries = udf_rw16(1);
icb->file_type = file_type; /* 8 bit */
icb->flags = udf_rw16(UDF_ICB_INTERN_ALLOC);
fe->perm = udf_rw32(0x7fff); /* all is allowed */
fe->link_cnt = udf_rw16(0); /* explicit setting */
fe->ckpoint = udf_rw32(1); /* user supplied file version */
udf_set_timestamp_now(&birthtime);
udf_set_timestamp_now(&fe->atime);
udf_set_timestamp_now(&fe->attrtime);
udf_set_timestamp_now(&fe->mtime);
/* set attributes */
if (st) {
#if !HAVE_NBTOOL_CONFIG_H
udf_set_timestamp(&birthtime, st->st_birthtime);
#else
udf_set_timestamp(&birthtime, 0);
#endif
udf_set_timestamp(&fe->atime, st->st_atime);
udf_set_timestamp(&fe->attrtime, st->st_ctime);
udf_set_timestamp(&fe->mtime, st->st_mtime);
fe->uid = udf_rw32(st->st_uid);
fe->gid = udf_rw32(st->st_gid);
fe->perm = unix_mode_to_udf_perm(st->st_mode);
icbflags = udf_rw16(fe->icbtag.flags);
icbflags &= ~UDF_ICB_TAG_FLAGS_SETUID;
icbflags &= ~UDF_ICB_TAG_FLAGS_SETGID;
icbflags &= ~UDF_ICB_TAG_FLAGS_STICKY;
if (st->st_mode & S_ISUID)
icbflags |= UDF_ICB_TAG_FLAGS_SETUID;
if (st->st_mode & S_ISGID)
icbflags |= UDF_ICB_TAG_FLAGS_SETGID;
if (st->st_mode & S_ISVTX)
icbflags |= UDF_ICB_TAG_FLAGS_STICKY;
fe->icbtag.flags = udf_rw16(icbflags);
}
udf_set_regid(&fe->imp_id, context.impl_name);
udf_add_impl_regid(&fe->imp_id);
fe->unique_id = udf_rw64(context.unique_id);
udf_advance_uniqueid();
fe->l_ea = udf_rw32(0);
/* create extended attribute to record our creation time */
ft_extattr = calloc(1, UDF_FILETIMES_ATTR_SIZE(1));
ft_extattr->hdr.type = udf_rw32(UDF_FILETIMES_ATTR_NO);
ft_extattr->hdr.subtype = 1; /* [4/48.10.5] */
ft_extattr->hdr.a_l = udf_rw32(UDF_FILETIMES_ATTR_SIZE(1));
ft_extattr->d_l = udf_rw32(UDF_TIMESTAMP_SIZE); /* one item */
ft_extattr->existence = UDF_FILETIMES_FILE_CREATION;
ft_extattr->times[0] = birthtime;
udf_extattr_append_internal((union dscrptr *) fe,
(struct extattr_entry *) ft_extattr);
free(ft_extattr);
/* record fidlength information */
fe->inf_len = udf_rw64(0);
fe->l_ad = udf_rw32(0);
fe->logblks_rec = udf_rw64(0); /* intern */
crclen = sizeof(struct file_entry) - 1 - UDF_DESC_TAG_LENGTH;
crclen += udf_rw32(fe->l_ea);
/* make sure the header sums stays correct */
fe->tag.desc_crc_len = udf_rw16(crclen);
udf_validate_tag_and_crc_sums((union dscrptr *) fe);
*fep = fe;
return 0;
}
int
udf_create_new_efe(struct extfile_entry **efep, int file_type, struct stat *st)
{
struct extfile_entry *efe;
struct icb_tag *icb;
uint32_t crclen; /* XXX: should be 16; need to detect overflow */
uint16_t icbflags;
*efep = NULL;
efe = calloc(1, context.sector_size);
if (efe == NULL)
return ENOMEM;
udf_inittag(&efe->tag, TAGID_EXTFENTRY, /* loc */ 0);
icb = &efe->icbtag;
/*
* Always use strategy type 4 unless on WORM wich we don't support
* (yet). Fill in defaults and set for internal allocation of data.
*/
icb->strat_type = udf_rw16(4);
icb->max_num_entries = udf_rw16(1);
icb->file_type = file_type; /* 8 bit */
icb->flags = udf_rw16(UDF_ICB_INTERN_ALLOC);
efe->perm = udf_rw32(0x7fff); /* all is allowed */
efe->link_cnt = udf_rw16(0); /* explicit setting */
efe->ckpoint = udf_rw32(1); /* user supplied file version */
udf_set_timestamp_now(&efe->ctime);
udf_set_timestamp_now(&efe->atime);
udf_set_timestamp_now(&efe->attrtime);
udf_set_timestamp_now(&efe->mtime);
/* set attributes */
if (st) {
#if !HAVE_NBTOOL_CONFIG_H
udf_set_timestamp(&efe->ctime, st->st_birthtime);
#else
udf_set_timestamp(&efe->ctime, 0);
#endif
udf_set_timestamp(&efe->atime, st->st_atime);
udf_set_timestamp(&efe->attrtime, st->st_ctime);
udf_set_timestamp(&efe->mtime, st->st_mtime);
efe->uid = udf_rw32(st->st_uid);
efe->gid = udf_rw32(st->st_gid);
efe->perm = unix_mode_to_udf_perm(st->st_mode);
icbflags = udf_rw16(efe->icbtag.flags);
icbflags &= ~UDF_ICB_TAG_FLAGS_SETUID;
icbflags &= ~UDF_ICB_TAG_FLAGS_SETGID;
icbflags &= ~UDF_ICB_TAG_FLAGS_STICKY;
if (st->st_mode & S_ISUID)
icbflags |= UDF_ICB_TAG_FLAGS_SETUID;
if (st->st_mode & S_ISGID)
icbflags |= UDF_ICB_TAG_FLAGS_SETGID;
if (st->st_mode & S_ISVTX)
icbflags |= UDF_ICB_TAG_FLAGS_STICKY;
efe->icbtag.flags = udf_rw16(icbflags);
}
udf_set_regid(&efe->imp_id, context.impl_name);
udf_add_impl_regid(&efe->imp_id);
efe->unique_id = udf_rw64(context.unique_id);
udf_advance_uniqueid();
/* record fidlength information */
efe->inf_len = udf_rw64(0);
efe->obj_size = udf_rw64(0);
efe->l_ad = udf_rw32(0);
efe->logblks_rec = udf_rw64(0);
crclen = sizeof(struct extfile_entry) - 1 - UDF_DESC_TAG_LENGTH;
/* make sure the header sums stays correct */
efe->tag.desc_crc_len = udf_rw16(crclen);
udf_validate_tag_and_crc_sums((union dscrptr *) efe);
*efep = efe;
return 0;
}
/* --------------------------------------------------------------------- */
/* for METADATA file appending only */
static void
udf_append_meta_mapping_part_to_efe(struct extfile_entry *efe,
struct short_ad *mapping)
{
struct icb_tag *icb;
uint64_t inf_len, obj_size, logblks_rec;
uint32_t l_ad, l_ea;
uint16_t crclen;
uint8_t *bpos;
inf_len = udf_rw64(efe->inf_len);
obj_size = udf_rw64(efe->obj_size);
logblks_rec = udf_rw64(efe->logblks_rec);
l_ad = udf_rw32(efe->l_ad);
l_ea = udf_rw32(efe->l_ea);
crclen = udf_rw16(efe->tag.desc_crc_len);
icb = &efe->icbtag;
/* set our allocation to shorts if not already done */
icb->flags = udf_rw16(UDF_ICB_SHORT_ALLOC);
/* append short_ad */
bpos = (uint8_t *) efe->data + l_ea + l_ad;
memcpy(bpos, mapping, sizeof(struct short_ad));
l_ad += sizeof(struct short_ad);
crclen += sizeof(struct short_ad);
inf_len += UDF_EXT_LEN(udf_rw32(mapping->len));
obj_size += UDF_EXT_LEN(udf_rw32(mapping->len));
logblks_rec = UDF_ROUNDUP(inf_len, context.sector_size) /
context.sector_size;
efe->l_ad = udf_rw32(l_ad);
efe->inf_len = udf_rw64(inf_len);
efe->obj_size = udf_rw64(obj_size);
efe->logblks_rec = udf_rw64(logblks_rec);
efe->tag.desc_crc_len = udf_rw16(crclen);
}
/* for METADATA file appending only */
static void
udf_append_meta_mapping_to_efe(struct extfile_entry *efe,
uint16_t partnr, uint32_t lb_num,
uint64_t len)
{
struct short_ad mapping;
uint64_t max_len, part_len;
/* calculate max length meta allocation sizes */
max_len = UDF_EXT_MAXLEN / context.sector_size; /* in sectors */
max_len = (max_len / layout.meta_blockingnr) * layout.meta_blockingnr;
max_len = max_len * context.sector_size;
memset(&mapping, 0, sizeof(mapping));
while (len) {
part_len = MIN(len, max_len);
mapping.lb_num = udf_rw32(lb_num);
mapping.len = udf_rw32(part_len);
udf_append_meta_mapping_part_to_efe(efe, &mapping);
lb_num += part_len / context.sector_size;
len -= part_len;
}
}
int
udf_create_meta_files(void)
{
struct extfile_entry *efe;
struct long_ad meta_icb;
uint64_t bytes;
uint32_t sector_size;
int filetype, error;
sector_size = context.sector_size;
memset(&meta_icb, 0, sizeof(meta_icb));
meta_icb.len = udf_rw32(sector_size);
meta_icb.loc.part_num = udf_rw16(context.data_part);
/* create metadata file */
meta_icb.loc.lb_num = udf_rw32(layout.meta_file);
filetype = UDF_ICB_FILETYPE_META_MAIN;
error = udf_create_new_efe(&efe, filetype, NULL);
if (error)
return error;
context.meta_file = efe;
/* create metadata mirror file */
meta_icb.loc.lb_num = udf_rw32(layout.meta_mirror);
filetype = UDF_ICB_FILETYPE_META_MIRROR;
error = udf_create_new_efe(&efe, filetype, NULL);
if (error)
return error;
context.meta_mirror = efe;
/* create metadata bitmap file */
meta_icb.loc.lb_num = udf_rw32(layout.meta_bitmap);
filetype = UDF_ICB_FILETYPE_META_BITMAP;
error = udf_create_new_efe(&efe, filetype, NULL);
if (error)
return error;
context.meta_bitmap = efe;
/* patch up files */
context.meta_file->unique_id = udf_rw64(0);
context.meta_mirror->unique_id = udf_rw64(0);
context.meta_bitmap->unique_id = udf_rw64(0);
/* restart unique id */
context.unique_id = 0x10;
/* XXX no support for metadata mirroring yet */
/* insert extents */
efe = context.meta_file;
udf_append_meta_mapping_to_efe(efe, context.data_part,
layout.meta_part_start_lba,
(uint64_t) layout.meta_part_size_lba * sector_size);
efe = context.meta_mirror;
udf_append_meta_mapping_to_efe(efe, context.data_part,
layout.meta_part_start_lba,
(uint64_t) layout.meta_part_size_lba * sector_size);
efe = context.meta_bitmap;
bytes = udf_space_bitmap_len(layout.meta_part_size_lba);
udf_append_meta_mapping_to_efe(efe, context.data_part,
layout.meta_bitmap_space, bytes);
return 0;
}
/* --------------------------------------------------------------------- */
int
udf_create_new_rootdir(union dscrptr **dscr)
{
struct file_entry *fe;
struct extfile_entry *efe;
struct long_ad root_icb;
int filetype, error;
memset(&root_icb, 0, sizeof(root_icb));
root_icb.len = udf_rw32(context.sector_size);
root_icb.loc.lb_num = udf_rw32(layout.rootdir);
root_icb.loc.part_num = udf_rw16(context.metadata_part);
filetype = UDF_ICB_FILETYPE_DIRECTORY;
if (context.dscrver == 2) {
error = udf_create_new_fe(&fe, filetype, NULL);
*dscr = (union dscrptr *) fe;
} else {
error = udf_create_new_efe(&efe, filetype, NULL);
*dscr = (union dscrptr *) efe;
}
if (error)
return error;
/* append '..' */
udf_append_parentfid(*dscr, &root_icb);
/* rootdir has explicit only one link on creation; '..' is no link */
if (context.dscrver == 2) {
fe->link_cnt = udf_rw16(1);
} else {
efe->link_cnt = udf_rw16(1);
}
context.num_directories++;
assert(context.num_directories == 1);
return 0;
}
void
udf_prepend_VAT_file(void)
{
/* old style VAT has no prepend */
if (context.dscrver == 2) {
context.vat_start = 0;
context.vat_size = 0;
return;
}
context.vat_start = offsetof(struct udf_vat, data);
context.vat_size = offsetof(struct udf_vat, data);
}
void
udf_vat_update(uint32_t virt, uint32_t phys)
{
uint32_t *vatpos;
uint32_t new_size;
if (context.vtop_tp[context.metadata_part] != UDF_VTOP_TYPE_VIRT)
return;
new_size = MAX(context.vat_size,
(context.vat_start + (virt+1)*sizeof(uint32_t)));
if (new_size > context.vat_allocated) {
context.vat_allocated =
UDF_ROUNDUP(new_size, context.sector_size);
context.vat_contents = realloc(context.vat_contents,
context.vat_allocated);
assert(context.vat_contents);
/* XXX could also report error */
}
vatpos = (uint32_t *) (context.vat_contents + context.vat_start);
vatpos[virt] = udf_rw32(phys);
context.vat_size = MAX(context.vat_size,
(context.vat_start + (virt+1)*sizeof(uint32_t)));
}
int
udf_append_VAT_file(void)
{
struct udf_oldvat_tail *oldvat_tail;
struct udf_vat *vathdr;
int32_t len_diff;
/* new style VAT has VAT LVInt analog in front */
if (context.dscrver == 3) {
/* set up VATv2 descriptor */
vathdr = (struct udf_vat *) context.vat_contents;
vathdr->header_len = udf_rw16(sizeof(struct udf_vat) - 1);
vathdr->impl_use_len = udf_rw16(0);
memcpy(vathdr->logvol_id, context.logical_vol->logvol_id, 128);
vathdr->prev_vat = udf_rw32(UDF_NO_PREV_VAT);
vathdr->num_files = udf_rw32(context.num_files);
vathdr->num_directories = udf_rw32(context.num_directories);
vathdr->min_udf_readver = udf_rw16(context.min_udf);
vathdr->min_udf_writever = udf_rw16(context.min_udf);
vathdr->max_udf_writever = udf_rw16(context.max_udf);
return 0;
}
/* old style VAT has identifier appended */
/* append "*UDF Virtual Alloc Tbl" id and prev. VAT location */
len_diff = context.vat_allocated - context.vat_size;
assert(len_diff >= 0);
if (len_diff < (int32_t) sizeof(struct udf_oldvat_tail)) {
context.vat_allocated += context.sector_size;
context.vat_contents = realloc(context.vat_contents,
context.vat_allocated);
assert(context.vat_contents);
/* XXX could also report error */
}
oldvat_tail = (struct udf_oldvat_tail *) (context.vat_contents +
context.vat_size);
udf_set_regid(&oldvat_tail->id, "*UDF Virtual Alloc Tbl");
udf_add_udf_regid(&oldvat_tail->id);
oldvat_tail->prev_vat = udf_rw32(UDF_NO_PREV_VAT);
context.vat_size += sizeof(struct udf_oldvat_tail);
return 0;
}
int
udf_create_VAT(union dscrptr **vat_dscr)
{
struct file_entry *fe;
struct extfile_entry *efe;
struct impl_extattr_entry *implext;
struct vatlvext_extattr_entry *vatlvext;
struct long_ad dataloc, *allocpos;
uint8_t *bpos, *extattr;
uint32_t ea_len, inf_len, vat_len, blks;
int filetype;
int error;
assert((layout.rootdir < 2) && (layout.fsd < 2));
memset(&dataloc, 0, sizeof(dataloc));
dataloc.len = udf_rw32(context.vat_size);
dataloc.loc.part_num = udf_rw16(context.data_part);
dataloc.loc.lb_num = udf_rw32(layout.vat);
if (context.dscrver == 2) {
/* old style VAT */
filetype = UDF_ICB_FILETYPE_UNKNOWN;
error = udf_create_new_fe(&fe, filetype, NULL);
if (error)
return error;
/* append VAT LVExtension attribute */
ea_len = sizeof(struct impl_extattr_entry) - 1 +
sizeof(struct vatlvext_extattr_entry) + 4;
extattr = calloc(1, ea_len);
implext = (struct impl_extattr_entry *) extattr;
implext->hdr.type = udf_rw32(2048); /* [4/48.10.8] */
implext->hdr.subtype = 1; /* [4/48.10.8.2] */
implext->hdr.a_l = udf_rw32(ea_len); /* VAT LVext EA size */
/* use 4 bytes of imp use for UDF checksum [UDF 3.3.4.5] */
implext->iu_l = udf_rw32(4);
udf_set_regid(&implext->imp_id, "*UDF VAT LVExtension");
udf_add_udf_regid(&implext->imp_id);
/* VAT LVExtension data follows UDF IU space */
bpos = ((uint8_t *) implext->data) + 4;
vatlvext = (struct vatlvext_extattr_entry *) bpos;
vatlvext->unique_id_chk = udf_rw64(fe->unique_id);
vatlvext->num_files = udf_rw32(context.num_files);
vatlvext->num_directories = udf_rw32(context.num_directories);
memcpy(vatlvext->logvol_id, context.logical_vol->logvol_id,128);
udf_extattr_append_internal((union dscrptr *) fe,
(struct extattr_entry *) extattr);
free(extattr);
fe->icbtag.flags = udf_rw16(UDF_ICB_LONG_ALLOC);
allocpos = (struct long_ad *) (fe->data + udf_rw32(fe->l_ea));
*allocpos = dataloc;
/* set length */
inf_len = context.vat_size;
fe->inf_len = udf_rw64(inf_len);
fe->l_ad = udf_rw32(sizeof(struct long_ad));
blks = UDF_ROUNDUP(inf_len, context.sector_size) /
context.sector_size;
fe->logblks_rec = udf_rw32(blks);
/* update vat descriptor's CRC length */
vat_len = sizeof(struct file_entry) - 1 - UDF_DESC_TAG_LENGTH;
vat_len += udf_rw32(fe->l_ad) + udf_rw32(fe->l_ea);
fe->tag.desc_crc_len = udf_rw16(vat_len);
*vat_dscr = (union dscrptr *) fe;
} else {
/* new style VAT */
filetype = UDF_ICB_FILETYPE_VAT;
error = udf_create_new_efe(&efe, filetype, NULL);
if (error)
return error;
efe->icbtag.flags = udf_rw16(UDF_ICB_LONG_ALLOC);
allocpos = (struct long_ad *) efe->data;
*allocpos = dataloc;
/* set length */
inf_len = context.vat_size;
efe->inf_len = udf_rw64(inf_len);
efe->obj_size = udf_rw64(inf_len);
efe->l_ad = udf_rw32(sizeof(struct long_ad));
blks = UDF_ROUNDUP(inf_len, context.sector_size) /
context.sector_size;
efe->logblks_rec = udf_rw32(blks);
vat_len = sizeof(struct extfile_entry)-1 - UDF_DESC_TAG_LENGTH;
vat_len += udf_rw32(efe->l_ad);
efe->tag.desc_crc_len = udf_rw16(vat_len);
*vat_dscr = (union dscrptr *) efe;
}
return 0;
}
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