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Enabled partition intervals with source "imported_iso" with ISO growing

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This commit is contained in:
Thomas Schmitt 2017-08-24 12:19:54 +02:00
parent e599a575dc
commit cace41ec16
3 changed files with 123 additions and 13 deletions
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51
libisofs/ecma119.c
View File

@ -1498,9 +1498,6 @@ static int finish_libjte(Ecma119Image *target)
}
/* >>> need opportunity to just mark a partition in the older sessions
*/
struct iso_interval_zeroizer {
int z_type; /* 0= $zero_start"-"$zero_end ,
@ -2001,6 +1998,49 @@ process_pending:;
}
/* Tells whether ivr is a reader from imported_iso in a multi-session
add-on situation, and thus to be kept in place.
*/
int iso_interval_reader_keep(Ecma119Image *target,
struct iso_interval_reader *ivr,
int flag)
{
/* Source must be "imported_iso" */
if (!(ivr->flags & 1))
return 0;
/* It must not be a new ISO */
if (!target->opts->appendable)
return 0;
/* multi-session write offset must be larger than interval end */
if (target->opts->ms_block <= ivr->end_byte / BLOCK_SIZE)
/* >>> ??? return error ??? */
return 0;
return 1;
}
int iso_interval_reader_start_size(Ecma119Image *t, char *path,
off_t *start_byte, off_t *byte_count,
int flag)
{
struct iso_interval_reader *ivr;
int keep, ret;
ret = iso_interval_reader_new(t->image, path, &ivr, byte_count, 0);
if (ret < 0)
return ret;
*start_byte = ivr->start_byte;
keep = iso_interval_reader_keep(t, ivr, 0);
iso_interval_reader_destroy(&ivr, 0);
return ISO_SUCCESS + (keep > 0);
}
int iso_write_partition_file(Ecma119Image *target, char *path,
uint32_t prepad, uint32_t blocks, int flag)
{
@ -2026,6 +2066,11 @@ int iso_write_partition_file(Ecma119Image *target, char *path,
&ivr, &byte_count, 0);
if (ret < 0)
goto ex;
if (iso_interval_reader_keep(target, ivr, 0)) {
/* From imported_iso and for add-on session. Leave it in place. */
ret = ISO_SUCCESS;
goto ex;
}
for (i = 0; i < blocks; i++) {
ret = iso_interval_reader_read(ivr, buf, &buf_fill, 0);
if (ret < 0)

13
libisofs/ecma119.h
View File

@ -1032,5 +1032,18 @@ int iso_write_partition_file(Ecma119Image *target, char *path,
void issue_ucs2_warning_summary(size_t failures);
/* Tells whether ivr is a reader from imported_iso in a multi-session
add-on situation, and thus to be kept in place.
*/
int iso_interval_reader_keep(Ecma119Image *target,
struct iso_interval_reader *ivr,
int flag);
/* @return: ISO_SUCCESS = ok, ISO_SUCCESS + 1 = keep , < 0 = error */
int iso_interval_reader_start_size(Ecma119Image *t, char *path,
off_t *start_byte, off_t *byte_count,
int flag);
#endif /*LIBISO_ECMA119_H_*/

68
libisofs/system_area.c
View File

@ -108,11 +108,14 @@ void iso_compute_cyl_head_sec(uint64_t img_blocks, int hpc, int sph,
}
/* @param flag bit0= The path contains instructions for the interval reader
@return ISO_SUCCESS = ok, partition will be written
ISO_SUCCESS + 1 = interval which shall be kept in place
else : error code
*/
static int compute_partition_size(Ecma119Image *t, char *disk_path,
uint32_t *size, int flag)
{
int ret;
int ret, keep;
off_t num;
struct stat stbuf;
struct iso_interval_reader *ivr;
@ -124,8 +127,9 @@ static int compute_partition_size(Ecma119Image *t, char *disk_path,
if (ret < 0)
return ret;
*size = (byte_count + BLOCK_SIZE - 1) / BLOCK_SIZE;
keep = iso_interval_reader_keep(t, ivr, 0);
iso_interval_reader_destroy(&ivr, 0);
return ISO_SUCCESS;
return ISO_SUCCESS + (keep > 0);
}
*size = 0;
@ -148,6 +152,7 @@ int iso_compute_append_partitions(Ecma119Image *t, int flag)
{
int ret, i, sa_type, cyl_align, cyl_size = 0;
uint32_t pos, size, add_pos = 0;
off_t start_byte, byte_count;
sa_type = (t->system_area_options >> 2) & 0x3f;
cyl_align = (t->system_area_options >> 8) & 0x3;
@ -168,6 +173,20 @@ int iso_compute_append_partitions(Ecma119Image *t, int flag)
t->opts->appended_part_flags[i]);
if (ret < 0)
return ret;
if (ret == ISO_SUCCESS + 1) {
/* Interval from imported_iso in add-on session */
t->appended_part_prepad[i] = 0;
ret = iso_interval_reader_start_size(t,
t->opts->appended_partitions[i],
&start_byte, &byte_count, 0);
if (ret < 0)
return ret;
t->appended_part_start[i] = start_byte / 2048;
t->appended_part_size[i] = size;
t->opts->iso_mbr_part_type = 0;
continue;
}
add_pos = 0;
if (sa_type == 3 && (pos % ISO_SUN_CYL_SIZE)) {
add_pos = ISO_SUN_CYL_SIZE - (pos % ISO_SUN_CYL_SIZE);
@ -2862,10 +2881,12 @@ static int partprepend_writer_compute_data_blocks(IsoImageWriter *writer)
{
Ecma119Image *t;
IsoFileSrc *src;
int ret, will_have_gpt = 0, with_chrp = 0, i, part_type;
int ret, will_have_gpt = 0, with_chrp = 0, i, part_type, keep;
static uint8_t zero_uuid[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
static uint64_t gpt_flags = (((uint64_t) 1) << 60) | 1;
uint8_t gpt_name[72];
uint64_t part_start;
off_t start_byte, byte_count;
/* <<< ??? Move to system_area.h and publish as macro ? */
static uint8_t efi_sys_uuid[16] = {
@ -2883,6 +2904,7 @@ static int partprepend_writer_compute_data_blocks(IsoImageWriter *writer)
will_have_gpt = 1;
if (t->opts->efi_boot_partition != NULL) {
keep = 0;
if (t->efi_boot_part_filesrc != NULL) {
/* A file in the emerging ISO image shall store its content
as prepended partition.
@ -2894,22 +2916,34 @@ static int partprepend_writer_compute_data_blocks(IsoImageWriter *writer)
src->sections[i].block = t->curblock + t->efi_boot_part_size;
t->efi_boot_part_size += (src->sections[i].size + 2047) / 2048;
}
part_start = t->curblock * 4;
} else {
ret = compute_partition_size(t, t->opts->efi_boot_partition,
&(t->efi_boot_part_size),
t->opts->efi_boot_part_flag & 1);
if (ret < 0)
return ret;
part_start = t->curblock * 4;
if (ret == ISO_SUCCESS + 1) {
/* Interval from imported_iso in add-on session will be kept */
ret = iso_interval_reader_start_size(t,
t->opts->efi_boot_partition,
&start_byte, &byte_count, 0);
if (ret < 0)
return ret;
part_start = start_byte / 512;
keep = 1;
}
}
memset(gpt_name, 0, 72);
strcpy((char *) gpt_name, "EFI boot partition");
iso_ascii_utf_16le(gpt_name);
ret = iso_quick_gpt_entry(t->gpt_req, &(t->gpt_req_count),
((uint64_t) t->curblock) * 4,
ret = iso_quick_gpt_entry(t->gpt_req, &(t->gpt_req_count), part_start,
((uint64_t) t->efi_boot_part_size) * 4,
efi_sys_uuid, zero_uuid, gpt_flags, gpt_name);
if (ret < 0)
return ret;
if (!keep)
t->curblock += t->efi_boot_part_size;
}
@ -2925,12 +2959,24 @@ static int partprepend_writer_compute_data_blocks(IsoImageWriter *writer)
return ISO_SUCCESS;
}
part_start = t->curblock * 4;
keep = 0;
if (t->opts->prep_partition != NULL) {
ret = compute_partition_size(t, t->opts->prep_partition,
&(t->prep_part_size),
t->opts->prep_part_flag & 1);
if (ret < 0)
return ret;
if (ret == ISO_SUCCESS + 1) {
/* Interval from imported_iso in add-on session will be kept */
ret = iso_interval_reader_start_size(t,
t->opts->prep_partition,
&start_byte, &byte_count, 0);
if (ret < 0)
return ret;
part_start = start_byte / 512;
keep = 1;
}
}
if (t->prep_part_size > 0 || t->opts->fat || will_have_gpt) {
/* Protecting MBR entry for ISO start or whole ISO */
@ -2948,18 +2994,24 @@ static int partprepend_writer_compute_data_blocks(IsoImageWriter *writer)
return ret;
}
if (t->prep_part_size > 0) {
ret = iso_quick_mbr_entry(t->mbr_req, &(t->mbr_req_count),
((uint64_t) t->curblock) * 4,
ret = iso_quick_mbr_entry(t->mbr_req, &(t->mbr_req_count), part_start,
((uint64_t) t->prep_part_size) * 4,
0x41, 0, 0);
if (ret < 0)
return ret;
if (!keep) {
t->curblock += t->prep_part_size;
part_start = t->curblock * 4;
} else {
part_start += t->prep_part_size * 4;
}
} else {
part_start = t->curblock * 4;
}
if (t->prep_part_size > 0 || t->opts->fat) {
/* FAT partition or protecting MBR entry for ISO end */
ret = iso_quick_mbr_entry(t->mbr_req, &(t->mbr_req_count),
((uint64_t) t->curblock) * 4, (uint64_t) 0,
part_start, (uint64_t) 0,
t->opts->fat ? 0x0c : 0xcd, 0, 0);
if (ret < 0)
return ret;