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apa.c
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apa.c
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/*
* apa.c
* $Id: apa.c,v 1.18 2007-05-12 20:13:29 bobi Exp $
*
* Copyright 2004 Bobi B., [email protected]
*
* This file is part of hdl_dump.
*
* hdl_dump is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* hdl_dump is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with hdl_dump; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <assert.h>
#include <stdio.h>
#include <time.h>
#include <string.h>
#include <stdlib.h>
#include "byteseq.h"
#include "retcodes.h"
#include "common.h"
#include "ps2_hdd.h"
#include "osal.h"
#include "apa.h"
#include "hio.h"
#define AUTO_DELETE_EMPTY
#define _MB *(1024 * 1024) /* really ugly :-) */
const char *PPAA_MAGIC =
"PS2ICON3D";
typedef struct ps2_partition_run_type
{
u_int32_t sector;
u_int32_t size_in_mb;
} ps2_partition_run_t;
static int apa_check(const apa_toc_t *toc);
static int apa_check_slice(const apa_slice_t *slice);
static int apa_delete_partition_from_slice(apa_slice_t *slice,
const char *partition_name);
/**************************************************************/
u_int32_t
apa_partition_checksum(const ps2_partition_header_t *part)
{
const u_int32_t *p = (const u_int32_t *)part;
register u_int32_t i;
u_int32_t sum = 0;
for (i = 1; i < 256; ++i)
sum += get_u32(p + i);
return (sum);
}
/**************************************************************/
int /* RET_OK, RET_NOT_APA, RET_ERR */
is_apa_partitioned(osal_handle_t handle)
{
ps2_partition_header_t part;
u_int32_t bytes;
int result = osal_read(handle, &part, sizeof(part), &bytes);
if (result == OSAL_OK) {
if (bytes == sizeof(part) &&
memcmp(part.magic, PS2_PARTITION_MAGIC, 4) == 0 &&
get_u32(&part.checksum) == apa_partition_checksum(&part))
return (RET_OK); /* APA */
else
return (RET_NOT_APA); /* not APA */
} else
return (result); /* error */
}
/**************************************************************/
static void
apa_slice_free(apa_slice_t *slice)
{
if (slice->chunks_map != NULL)
osal_free(slice->chunks_map);
slice->chunks_map = NULL;
if (slice->parts != NULL)
osal_free(slice->parts);
slice->parts = NULL;
}
/**************************************************************/
void apa_toc_free(/*@only@*/ apa_toc_t *toc) /*@releases toc@*/
{
if (toc != NULL) {
apa_slice_free(toc->slice + 0);
apa_slice_free(toc->slice + 1);
osal_free(toc);
}
}
/**************************************************************/
static int
apa_part_add(/*@special@*/ apa_slice_t *slice,
const ps2_partition_header_t *part,
int existing,
int linked)
/*@uses slice->part_count, slice->part_alloc_, slice->parts@*/
/*@modifies slice->part_count, slice->part_alloc_, slice->parts@*/
/*@sets *slice->parts@*/
{
if (slice->part_count == slice->part_alloc_) { /* grow buffer */
const u_int32_t GROW = 200;
u_int32_t bytes = (slice->part_alloc_ + GROW) * sizeof(apa_partition_t);
apa_partition_t *tmp = osal_alloc(bytes);
if (tmp != NULL) {
memset(tmp, 0, bytes);
if (slice->parts != NULL) { /* copy existing */
memcpy(tmp, slice->parts,
slice->part_count * sizeof(apa_partition_t));
osal_free(slice->parts);
}
slice->parts = tmp;
slice->part_alloc_ += GROW;
} else
return (RET_NO_MEM);
}
assert(slice->parts != NULL);
if (slice->parts == NULL)
return (RET_INVARIANT);
memcpy(&slice->parts[slice->part_count].header, part,
sizeof(ps2_partition_header_t));
slice->parts[slice->part_count].existing = existing;
slice->parts[slice->part_count].modified = !existing;
slice->parts[slice->part_count].linked = linked;
++slice->part_count;
return (RET_OK);
}
/**************************************************************/
static int
apa_setup_statistics(/*@special@*/ apa_slice_t *slice)
/*@uses slice->size_in_mb, slice->part_count, slice->parts@*/
/*@sets slice->total_chunks, slice->allocated_chunks,
slice->free_chunks, slice->chunks_map, *slice->chunks_map@*/
{
char *map;
slice->total_chunks = slice->size_in_mb / 128;
map = osal_alloc(slice->total_chunks * sizeof(char));
if (map != NULL) {
u_int32_t i;
*map = MAP_AVAIL;
for (i = 0; i < slice->total_chunks; ++i)
map[i] = MAP_AVAIL;
/* build occupided/available space map */
slice->allocated_chunks = 0;
slice->free_chunks = slice->total_chunks;
for (i = 0; i < slice->part_count; ++i) {
const ps2_partition_header_t *part = &slice->parts[i].header;
u_int32_t part_no = get_u32(&part->start) / ((128 _MB) / 512);
u_int32_t num_parts = get_u32(&part->length) / ((128 _MB) / 512);
/* "alloc" num_parts starting at part_no */
while (num_parts) {
if (map[part_no] == MAP_AVAIL)
map[part_no] = (get_u32(&part->main) == 0 ?
MAP_MAIN :
MAP_SUB);
else
map[part_no] = MAP_COLL; /* collision */
++part_no;
--num_parts;
++slice->allocated_chunks;
--slice->free_chunks;
}
}
if (slice->chunks_map != NULL)
osal_free(slice->chunks_map);
slice->chunks_map = map;
return (RET_OK);
} else
return (RET_NO_MEM);
}
/**************************************************************/
int apa_toc_read(const dict_t *config,
const char *path,
apa_toc_p_t *toc)
{
/*@only@*/ hio_t *hio = NULL;
int result;
*toc = NULL;
result = hio_probe(config, path, &hio);
if (result == OSAL_OK && hio != NULL) {
result = apa_toc_read_ex(hio, toc);
(void)hio->close(hio), hio = NULL;
}
return (result);
}
/**************************************************************/
static int
apa_slice_read(hio_t *hio,
/*@special@*/ apa_toc_t *toc,
int slice_index,
int raw)
/*@uses toc->got_2nd_slice,toc->size_in_kb@*/
/*@sets toc->slice[slice_index]@*/
{
const u_int32_t EXACTLY_128MB = 128 * 1024 * 1024; /* KB */
const u_int32_t ALMOST_128MB = EXACTLY_128MB - 1; /* KB */
const u_int32_t SLICE_2_OFFS = 0x10000000; /* sectors */
apa_slice_t *slice = toc->slice + slice_index;
int result;
u_int32_t total_sectors;
u_int32_t bytes;
ps2_partition_header_t part;
u_int32_t sector = 0;
u_int32_t count = 0;
/* calculate total number of sectors for the requested slice */
if (toc->got_2nd_slice)
if (slice_index == 0)
total_sectors = (toc->size_in_kb < ALMOST_128MB ?
toc->size_in_kb :
ALMOST_128MB) *
2; /* 1st */
else
total_sectors = (toc->size_in_kb - EXACTLY_128MB) * 2; /* 2nd */
else
total_sectors = toc->size_in_kb * 2; /* the one and only */
slice->slice_index = slice_index;
slice->size_in_mb = total_sectors / 2048;
slice->total_chunks = slice->allocated_chunks = slice->free_chunks = 0;
osal_free(slice->chunks_map), slice->chunks_map = NULL;
slice->part_alloc_ = 0;
slice->part_count = 0;
osal_free(slice->parts), slice->parts = NULL;
do { /* read partitions */
result = hio->read(hio, sector + SLICE_2_OFFS * slice_index, 2,
&part, &bytes);
if (result == RET_OK &&
bytes == sizeof(part)) {
if (memcmp(part.magic, PS2_PARTITION_MAGIC, 4) != 0)
result = RET_NOT_APA;
if (result == RET_OK &&
get_u32(&part.checksum) == apa_partition_checksum(&part)) { /* NOTE: start should be the same as sector? */
u_int32_t start = get_u32(&part.start);
if (start < total_sectors &&
start + get_u32(&part.length) < total_sectors) {
++count;
result = apa_part_add(slice, &part, 1, 1);
if (result == RET_OK)
sector = get_u32(&part.next);
} else { /* partition behind end-of-HDD */
if (toc->got_2nd_slice)
result = RET_CROSS_128GB; /* data behind 128GB mark */
else
result = RET_BAD_APA; /* data behind end-of-HDD */
break;
}
/* TODO: check whether next partition is not loaded already --
* do not deadlock; that is a quick-and-dirty hack */
if (slice->part_count > 10000)
result = RET_BAD_APA;
} else
result = (result == RET_OK ? RET_BAD_APA : result);
} else
result = RET_NOT_APA;
} while (result == RET_OK && sector != 0);
if (!raw) {
if (count == 0)
/* no partitions? __boot should always exists */
result = RET_BAD_APA;
if (result == RET_OK) {
result = apa_setup_statistics(slice);
if (result == RET_OK)
result = apa_check_slice(slice);
#if defined(AUTO_DELETE_EMPTY)
/* automatically remove "__empty" partitions */
while (result == RET_OK)
result = apa_delete_partition_from_slice(slice, "__empty");
if (result == RET_NOT_FOUND)
result = apa_check_slice(slice);
#endif
}
}
return (result);
}
/**************************************************************/
static int
apa_toc_read_internal(hio_t *hio,
/*@special@*/ apa_toc_p_t *toc2,
int raw) /*@allocates *toc2@*/ /*@defines *toc2@*/
{
u_int32_t size_in_kb;
int result = hio->stat(hio, &size_in_kb);
if (result == OSAL_OK) {
/*@only@*/ apa_toc_t *toc = (apa_toc_t *)osal_alloc(sizeof(apa_toc_t));
if (toc != NULL) {
u_int32_t bytes;
ps2_partition_header_t part;
/* read MBR to auto-detect partition dialect */
memset(toc, 0, sizeof(apa_toc_t));
result = hio->read(hio, 0, 2, &part, &bytes);
if (result == RET_OK && bytes == 1024) {
toc->size_in_kb = size_in_kb;
toc->is_toxic =
(memcmp(part.mbr.toxic_magic, "APAEXT\0\0", 8) == 0);
toc->is_2_slice = 0;
toc->got_2nd_slice = 0;
if (toc->is_toxic) {
toc->is_2_slice = (part.mbr.toxic_flags & 0x01) != 0;
if (toc->is_2_slice)
toc->got_2nd_slice = (size_in_kb > 128 * 1024 * 1024);
}
if (result == RET_OK)
result = apa_slice_read(hio, toc, 0, raw); /* only or 1st */
if (result == RET_OK &&
toc->got_2nd_slice)
result = apa_slice_read(hio, toc, 1, raw); /* 2nd */
}
if (result == RET_OK)
*toc2 = toc;
else
apa_toc_free(toc), toc = NULL;
} else
result = RET_NO_MEM;
}
return (result);
}
/**************************************************************/
int apa_toc_read_ex(hio_t *hio,
apa_toc_p_t *toc)
{
/*@only@*/ apa_toc_t *tmp = NULL;
int result = apa_toc_read_internal(hio, &tmp, 0);
if (result == RET_OK)
*toc = tmp;
return (result);
}
/**************************************************************/
static int
apa_find_partition_in_slice(const apa_slice_t *slice,
const char *partition_name,
/*@out@*/ u_int32_t *partition_index)
{
u_int32_t i;
int result = RET_NOT_FOUND;
*partition_index = (u_int32_t)-1;
for (i = 0; i < slice->part_count; ++i) {
const ps2_partition_header_t *part = &slice->parts[i].header;
if (get_u32(&part->main) == 0) { /* trim partition name */
char id_copy[PS2_PART_IDMAX + 1], *part_id_end;
memcpy(id_copy, part->id, PS2_PART_IDMAX);
id_copy[PS2_PART_IDMAX] = '\0';
part_id_end = id_copy + PS2_PART_IDMAX - 1;
while (part_id_end > id_copy && *part_id_end == ' ')
*part_id_end-- = '\0';
if (caseless_compare(id_copy, partition_name)) { /* found */
*partition_index = i;
result = RET_OK;
break;
}
}
}
return (result);
}
/**************************************************************/
int apa_find_partition(const apa_toc_t *toc,
const char *partition_name,
int *slice_index,
u_int32_t *partition_index)
{
int result = apa_find_partition_in_slice(toc->slice + 0, partition_name,
partition_index);
*slice_index = 0;
if (result == RET_NOT_FOUND && toc->got_2nd_slice) {
result = apa_find_partition_in_slice(toc->slice + 1, partition_name,
partition_index);
if (result == RET_OK)
*slice_index = 1;
}
return (result);
}
/**************************************************************/
static int
compare_partitions(const void *e1,
const void *e2)
{
const ps2_partition_run_t *p1 = e1;
const ps2_partition_run_t *p2 = e2;
int diff = (int)p2->size_in_mb - (int)p1->size_in_mb;
if (diff != 0)
return (diff);
else
return ((int)p1->sector - (int)p2->sector);
}
/* descending by size, ascending by sector */
static void
sort_partitions(ps2_partition_run_t *partitions,
u_int32_t partitions_used)
{
/* TODO: consider better sorting to take care about partitioning on as few runs as possible */
qsort(partitions, partitions_used, sizeof(ps2_partition_run_t), &compare_partitions);
}
/* join neighbour partitions of the same size, but sum up to max_part_size_in_mb */
static void
optimize_partitions(ps2_partition_run_t *partitions,
u_int32_t *partitions_used,
u_int32_t max_part_size_in_mb)
{
int have_join;
do {
u_int32_t i;
have_join = 0;
for (i = 0; i < *partitions_used - 1; ++i) {
u_int32_t curr_part_end_sector =
partitions[i].sector +
partitions[i].size_in_mb * ((1 _MB) / 512);
u_int32_t u_int32_to_be = partitions[i].size_in_mb * 2;
int next_is_same_size =
partitions[i].size_in_mb == partitions[i + 1].size_in_mb;
int would_be_aligned =
partitions[i].sector % (u_int32_to_be * ((1 _MB) / 512)) == 0;
if (u_int32_to_be <= max_part_size_in_mb &&
curr_part_end_sector == partitions[i + 1].sector &&
next_is_same_size &&
would_be_aligned) {
partitions[i].size_in_mb *= 2;
memmove(partitions + i + 1, partitions + i + 2,
(*partitions_used - i - 2) * sizeof(ps2_partition_run_t));
--(*partitions_used);
have_join = 1;
}
}
} while (have_join);
}
/**************************************************************/
static void
set_ps2fs_datetime(/*@out@*/ ps2fs_datetime_t *dt,
time_t to)
{
const struct tm *tm = localtime(&to);
if (tm != NULL) {
dt->unused = 0;
dt->sec = (u_int8_t)tm->tm_sec;
dt->min = (u_int8_t)tm->tm_min;
dt->hour = (u_int8_t)tm->tm_hour;
dt->day = (u_int8_t)tm->tm_mday;
dt->month = (u_int8_t)(tm->tm_mon + 1);
set_u16(&dt->year, (u_int16_t)(tm->tm_year + 1900));
} else { /* highly unlikely */
dt->unused = 0;
dt->sec = dt->min = dt->hour = 0;
dt->day = 1;
dt->month = 1;
set_u16(&dt->year, 2005);
}
}
static void
setup_main_part(/*@out@*/ ps2_partition_header_t *part,
const char *name,
const ps2_partition_run_t *partitions,
u_int32_t partitions_used,
u_int32_t last_partition_sector)
{
u_int32_t i;
memset(part, 0, sizeof(ps2_partition_header_t));
memcpy(part->magic, PS2_PARTITION_MAGIC, 4);
set_u32(&part->next, partitions_used > 0 ? partitions[1].sector : 0);
set_u32(&part->prev, last_partition_sector);
memmove(part->id, name,
strlen(name) > PS2_PART_IDMAX ? PS2_PART_IDMAX : strlen(name));
set_u32(&part->start, partitions[0].sector);
set_u32(&part->length, partitions[0].size_in_mb * ((1 _MB) / 512));
set_u16(&part->type, PS2_HDL_PARTITION);
set_u16(&part->flags, 0);
set_u32(&part->nsub, partitions_used - 1);
set_ps2fs_datetime(&part->created, time(NULL));
set_u32(&part->main, 0);
set_u32(&part->number, 0);
set_u32(&part->modver, 0x201);
for (i = 1; i < partitions_used; ++i) {
set_u32(&part->subs[i - 1].start, partitions[i].sector);
set_u32(&part->subs[i - 1].length, partitions[i].size_in_mb * ((1 _MB) / 512));
}
set_u32(&part->checksum, apa_partition_checksum(part));
}
static void
setup_sub_part(ps2_partition_header_t *part,
u_int32_t index,
const ps2_partition_run_t *partitions,
u_int32_t partitions_used)
{
memset(part, 0, sizeof(ps2_partition_header_t));
memcpy(part->magic, PS2_PARTITION_MAGIC, 4);
set_u32(&part->next, index + 1 < partitions_used ? partitions[index + 1].sector : 0);
set_u32(&part->prev, partitions[index - 1].sector);
set_u32(&part->start, partitions[index].sector);
set_u32(&part->length, partitions[index].size_in_mb * ((1 _MB) / 512));
set_u16(&part->type, PS2_HDL_PARTITION);
set_u16(&part->flags, PS2_PART_FLAG_SUB);
set_u32(&part->nsub, 0);
set_ps2fs_datetime(&part->created, time(NULL));
set_u32(&part->main, partitions[0].sector);
set_u32(&part->number, index);
set_u32(&part->modver, 0x201);
set_u32(&part->checksum, apa_partition_checksum(part));
}
/**************************************************************/
static int
sort_by_starting_sector(const void *e1,
const void *e2)
{
const apa_partition_t *p1 = (const apa_partition_t *)e1;
const apa_partition_t *p2 = (const apa_partition_t *)e2;
return (get_u32(&p1->header.start) > get_u32(&p2->header.start) ? 1 : -1);
}
static void
normalize_linked_list(apa_slice_t *slice)
{
qsort(slice->parts, slice->part_count, sizeof(apa_partition_t), sort_by_starting_sector);
if (slice->part_count >= 1) {
u_int32_t i;
for (i = 0; i < slice->part_count; ++i) {
apa_partition_t *prev = slice->parts + (i > 0 ? i - 1 : slice->part_count - 1);
apa_partition_t *curr = slice->parts + i;
apa_partition_t *next = slice->parts + (i + 1 < slice->part_count ? i + 1 : 0);
/* no need to be endian-aware, since both have same endianess */
if (curr->header.prev != prev->header.start) {
curr->modified = 1;
curr->header.prev = prev->header.start;
}
if (curr->header.next != next->header.start) {
curr->modified = 1;
curr->header.next = next->header.start;
}
if (curr->modified)
set_u32(&curr->header.checksum, apa_partition_checksum(&curr->header));
}
}
}
/**************************************************************/
static int
apa_allocate_space_in_slice(apa_slice_t *slice,
const char *partition_name,
u_int32_t size_in_mb,
/*@out@*/ u_int32_t *new_partition_start,
int decreasing_size)
{
int result = RET_OK;
char *map = slice->chunks_map;
*new_partition_start = (u_int32_t)-1;
if (size_in_mb == 0)
return (RET_INVARIANT);
if (slice->free_chunks * 128 >= size_in_mb) {
u_int32_t max_part_size_in_entries =
slice->total_chunks < 32 ? 1 : slice->total_chunks / 32;
u_int32_t max_part_size_in_mb = max_part_size_in_entries * 128;
u_int32_t estimated_entries = (size_in_mb + 127) / 128 + 1;
u_int32_t partitions_used = 0;
ps2_partition_run_t *partitions =
osal_alloc(estimated_entries * sizeof(ps2_partition_run_t));
if (partitions != NULL) {
/* use the most straight forward approach possible:
fill from the first gap onwards */
u_int32_t mb_remaining = size_in_mb;
u_int32_t allocated_mb, overhead_mb, i;
partitions->sector = partitions->size_in_mb = 0;
for (i = 0; i < estimated_entries; ++i) { /* initialize */
partitions[i].sector = 0;
partitions[i].size_in_mb = 0;
}
for (i = 0; mb_remaining > 0 && i < slice->total_chunks; ++i)
if (map[i] == MAP_AVAIL) {
partitions[partitions_used].sector = i * ((128 _MB) / 512);
partitions[partitions_used].size_in_mb = 128;
map[i] = MAP_ALLOC; /* "allocate" chunk */
++partitions_used;
mb_remaining = (mb_remaining > 128 ? mb_remaining - 128 : 0);
}
optimize_partitions(partitions, &partitions_used,
max_part_size_in_mb);
/* calculate overhead (4M for main + 1M for each sub)
and allocate additional 128 M partition if necessary */
allocated_mb = 0;
overhead_mb = 3;
for (i = 0; i < partitions_used; ++i) {
allocated_mb += partitions[i].size_in_mb;
++overhead_mb;
}
if (allocated_mb < size_in_mb + overhead_mb) { /* add one more partition or return RET_NO_SPACE */
int free_entry_found = 0;
for (i = 0; i < slice->total_chunks; ++i)
if (map[i] == MAP_AVAIL) {
partitions[partitions_used].sector =
i * ((128 _MB) / 512);
partitions[partitions_used].size_in_mb = 128;
++partitions_used;
optimize_partitions(partitions, &partitions_used,
max_part_size_in_mb);
free_entry_found = 1;
break;
}
result = free_entry_found ? RET_OK : RET_NO_SPACE;
} else
result = RET_OK;
if (result == RET_OK) { /* create new partitions in the partition slice */
ps2_partition_header_t part;
u_int32_t last_partition_start =
slice->part_count > 0 ?
get_u32(&slice->parts[slice->part_count - 1].header.start) :
0;
if (decreasing_size)
sort_partitions(partitions, partitions_used);
/* current last partition would be remapped by normalize */
setup_main_part(&part, partition_name, partitions,
partitions_used, last_partition_start);
result = apa_part_add(slice, &part, 0, 1);
for (i = 1; result == RET_OK && i < partitions_used; ++i) {
setup_sub_part(&part, i, partitions, partitions_used);
result = apa_part_add(slice, &part, 0, 1);
}
if (result == RET_OK) {
normalize_linked_list(slice);
*new_partition_start = partitions[0].sector;
}
}
osal_free(partitions);
} else
result = RET_NO_MEM; /* out-of-memory */
} else
result = RET_NO_SPACE; /* not enough free space */
return (result);
}
/**************************************************************/
int apa_allocate_space(apa_toc_t *toc,
const char *partition_name,
u_int32_t size_in_mb,
int *slice_index,
u_int32_t *new_partition_start,
int decreasing_size)
{
int result;
int tmp_slice_index = 0;
u_int32_t tmp_partition_index = 0;
/* check if such name exists */
result = apa_find_partition(toc, partition_name, &tmp_slice_index,
&tmp_partition_index);
if (result == RET_OK)
return (RET_PART_EXISTS);
if (!(*slice_index == 0 || (*slice_index == 1 && toc->got_2nd_slice)))
*slice_index = (toc->got_2nd_slice ? 1 : 0); /* try in 2nd first */
result = apa_allocate_space_in_slice(toc->slice + *slice_index,
partition_name, size_in_mb,
new_partition_start, decreasing_size);
if (result == RET_OK)
;
else if (toc->got_2nd_slice) {
*slice_index = (*slice_index == 0 ? 1 : 0);
result = apa_allocate_space_in_slice(toc->slice + *slice_index,
partition_name, size_in_mb,
new_partition_start,
decreasing_size);
}
return (result);
}
/**************************************************************/
static int
apa_delete_partition_from_slice(apa_slice_t *slice,
const char *partition_name)
{
u_int32_t partition_index;
int result = apa_find_partition_in_slice(slice, partition_name,
&partition_index);
if (result == RET_OK) {
u_int32_t i, count = 1;
u_int32_t pending_deletes[PS2_PART_MAXSUB]; /* starting sectors of parts pending delete */
const ps2_partition_header_t *part =
&slice->parts[partition_index].header;
if (get_u16(&part->type) == 1)
return (RET_NOT_ALLOWED); /* deletion of system partitions is not allowed */
/* preserve a list of partitions to be deleted */
pending_deletes[0] = get_u32(&part->start);
for (i = 0; i < get_u32(&part->nsub); ++i)
pending_deletes[count++] = get_u32(&part->subs[i].start);
/* remove partitions from the double-linked list */
i = 0;
while (i < slice->part_count) {
u_int32_t j;
int found = 0;
for (j = 0; j < count; ++j)
if (get_u32(&slice->parts[i].header.start) == pending_deletes[j]) {
found = 1;
break;
}
if (found) { /* remove this partition */
u_int32_t part_no = get_u32(&slice->parts[i].header.start) / 262144; /* 262144 sectors == 128M */
u_int32_t num_parts = get_u32(&slice->parts[i].header.length) / 262144;
memmove(slice->parts + i, slice->parts + i + 1,
sizeof(apa_partition_t) * (slice->part_count - i - 1));
--slice->part_count;
/* "free" num_parts starting at part_no */
while (num_parts) {
slice->chunks_map[part_no] = MAP_AVAIL;
++part_no;
--num_parts;
--slice->allocated_chunks;
++slice->free_chunks;
}
} else
++i;
}
normalize_linked_list(slice);
}
return (result);
}
/**************************************************************/
int apa_delete_partition(apa_toc_t *toc,
const char *partition_name)
{
int result = apa_delete_partition_from_slice(toc->slice + 0,
partition_name);
if (result == RET_NOT_FOUND)
result = apa_delete_partition_from_slice(toc->slice + 1,
partition_name);
return (result);
}
/**************************************************************/
int apa_commit(const dict_t *config,
const char *path,
const apa_toc_t *toc)
{
int result = apa_check(toc);
if (result == RET_OK) {
/*@only@*/ hio_t *hio = NULL;
result = hio_probe(config, path, &hio);
if (result == OSAL_OK && hio != NULL) {
result = apa_commit_ex(hio, toc);
if (result == RET_OK) {
(void)hio->flush(hio);
result = hio->close(hio);
} else
(void)hio->close(hio); /* ignore close error in this case */
hio = NULL;
}
}
return (result);
}
/**************************************************************/
static int
apa_commit_slice(hio_t *hio,
const apa_toc_t *toc,
int slice_index)
{
const apa_slice_t *slice = toc->slice + slice_index;
int result = apa_check_slice(slice);
if (result == RET_OK) {
u_int32_t i;
for (i = 0; result == RET_OK && i < slice->part_count; ++i) {
if (slice->parts[i].modified) {
const u_int32_t SLICE_2_OFFS = 0x10000000; /* sectors */
u_int32_t bytes;
const ps2_partition_header_t *part = &slice->parts[i].header;
u_int32_t sector = (get_u32(&part->start) +
SLICE_2_OFFS * slice_index);
result = hio->write(hio, sector, 2, part, &bytes);
if (result == OSAL_OK)
result = (bytes == sizeof(ps2_partition_header_t) ?
OSAL_OK :
RET_ERR);
}
}
}
return (result);
}
/**************************************************************/
int apa_commit_ex(hio_t *hio,
const apa_toc_t *toc)
{
int result = apa_check(toc);
if (result == RET_OK) {
result = apa_commit_slice(hio, toc, 0);
if (result == RET_OK &&
toc->got_2nd_slice)
result = apa_commit_slice(hio, toc, 1);
}
return (result);
}
/**************************************************************/
#define ADD_PROBLEM(buff, size, problem, len) \
if ((len) < (size)) { \
memcpy(buff, problem, len); \
(size) -= (len); \
(buff) += (len); \
*(buff) = '\0'; \
}
static int
apa_list_problems(const apa_slice_t *slice,
/*@out@*/ char *buffer,
size_t buffer_size)
{ /* NOTE: keep in sync with apa_check */
u_int32_t i, j, k;
char tmp[1024];
size_t len;
const u_int32_t total_sectors = slice->size_in_mb * 1024 * 2;
*buffer = '\0';
for (i = 0; i < slice->part_count; ++i) {
const ps2_partition_header_t *part = &slice->parts[i].header;
u_int32_t checksum = apa_partition_checksum(part);
if (get_u32(&part->checksum) != checksum) {
len = sprintf(tmp, "%06lx00: bad checksum: 0x%08lx instead of 0x%08lx;\n",
(unsigned long)(get_u32(&part->start) >> 8),
(unsigned long)get_u32(&part->checksum),
(unsigned long)checksum);
ADD_PROBLEM(buffer, buffer_size, tmp, len);
}
if (get_u32(&part->start) < total_sectors &&
get_u32(&part->start) + get_u32(&part->length) <= total_sectors)
;
else {
len = sprintf(tmp, "%06lx00 +%06lx00: outside data area;\n",
(unsigned long)(get_u32(&part->start) >> 8),
(unsigned long)(get_u32(&part->length) >> 8));
ADD_PROBLEM(buffer, buffer_size, tmp, len);
}
if ((get_u32(&part->length) % ((128 _MB) / 512)) != 0) {
len = sprintf(tmp, "%06lx00: size %06lx00 not multiple to 128MB;\n",
(unsigned long)(get_u32(&part->start) >> 8),
(unsigned long)(get_u32(&part->length) >> 8));
ADD_PROBLEM(buffer, buffer_size, tmp, len);
}
if ((get_u32(&part->start) % get_u32(&part->length)) != 0) {
len = sprintf(tmp, "%06lx00: start not multiple to size %06lx00;\n",
(unsigned long)(get_u32(&part->start) >> 8),
(unsigned long)(get_u32(&part->length) >> 8));
ADD_PROBLEM(buffer, buffer_size, tmp, len);
}
if (get_u32(&part->main) == 0 &&
get_u16(&part->flags) == 0 &&
get_u32(&part->start) != 0) { /* check sub-partitions */
u_int32_t count = 0;
for (j = 0; j < slice->part_count; ++j) {
const ps2_partition_header_t *part2 = &slice->parts[j].header;
if (get_u32(&part2->main) == get_u32(&part->start)) { /* sub-partition of current main partition */
int found;
if (get_u16(&part2->flags) != PS2_PART_FLAG_SUB) {
len = sprintf(tmp, "%06lx00: mismatching sub-partition flag;\n",
(unsigned long)(get_u32(&part2->start) >> 8));
ADD_PROBLEM(buffer, buffer_size, tmp, len);
}
found = 0;
for (k = 0; k < get_u32(&part->nsub); ++k)
if (get_u32(&part->subs[k].start) == get_u32(&part2->start)) { /* in list */
if (get_u32(&part->subs[k].length) != get_u32(&part2->length)) {
len = sprintf(tmp, "%06lx00: mismatching sub-partition size: %06lx00 != %06lx00;\n",
(unsigned long)(get_u32(&part2->start) >> 8),
(unsigned long)(get_u32(&part2->length) >> 8),
(unsigned long)(get_u32(&part->subs[k].length) >> 8));
ADD_PROBLEM(buffer, buffer_size, tmp, len);
}
found = 1;
break;
}
if (!found) {
len = sprintf(tmp, "%06lx00: not a sub-partition of %06lx00;\n",
(unsigned long)(get_u32(&part2->start) >> 8),
(unsigned long)(get_u32(&part->start) >> 8));
ADD_PROBLEM(buffer, buffer_size, tmp, len);
}
++count;
}
}
if (count != get_u32(&part->nsub)) {
len = sprintf(tmp, "%06lx00: only %u sub-partitions found of %u;\n",
(unsigned long)(get_u32(&part->start) >> 8),
(unsigned int)count, (unsigned int)get_u32(&part->nsub));
ADD_PROBLEM(buffer, buffer_size, tmp, len);
}
}
}
/* verify double-linked list */
for (i = 0; i < slice->part_count; ++i) {
apa_partition_t *prev = slice->parts + (i > 0 ? i - 1 : slice->part_count - 1);
apa_partition_t *curr = slice->parts + i;
apa_partition_t *next = slice->parts + (i + 1 < slice->part_count ? i + 1 : 0);
if (get_u32(&curr->header.prev) != get_u32(&prev->header.start)) {
len = sprintf(tmp, "%06lx00: previous is %06lx00, not %06lx00;\n",
(unsigned long)(get_u32(&curr->header.start) >> 8),
(unsigned long)(get_u32(&prev->header.start) >> 8),
(unsigned long)(get_u32(&curr->header.prev) >> 8));
ADD_PROBLEM(buffer, buffer_size, tmp, len);
}
if (get_u32(&curr->header.next) != get_u32(&next->header.start)) {