#include <sys/param.h>
#include <sys/disklabel.h>
#include <sys/dkio.h>
#include <sys/ioctl.h>
#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <uuid.h>
#include "part.h"
#include "disk.h"
#include "mbr.h"
#include "misc.h"
#include "gpt.h"
#ifdef DEBUG
#define DPRINTF(x...) printf(x)
#else
#define DPRINTF(x...)
#endif
struct mbr gmbr;
struct gpt_header gh;
struct gpt_partition gp[NGPTPARTITIONS];
const struct gpt_partition * const *sort_gpt(void);
int lba_free(uint64_t *, uint64_t *);
int add_partition(const uint8_t *, const char *, uint64_t);
int find_partition(const uint8_t *);
int get_header(const uint64_t);
int get_partition_table(void);
int init_gh(void);
int init_gp(const int);
uint32_t crc32(const u_char *, const uint32_t);
int protective_mbr(const struct mbr *);
int gpt_chk_mbr(struct dos_partition *, uint64_t);
void string_to_name(const unsigned int, const char *);
const char *name_to_string(const unsigned int);
void print_free(const uint64_t, const uint64_t,
const char *);
void
string_to_name(const unsigned int pn, const char *ch)
{
unsigned int i;
memset(gp[pn].gp_name, 0, sizeof(gp[pn].gp_name));
for (i = 0; i < nitems(gp[pn].gp_name) && ch[i] != '\0'; i++)
gp[pn].gp_name[i] = htole16((unsigned int)ch[i]);
}
const char *
name_to_string(const unsigned int pn)
{
static char name[GPTPARTNAMESIZE + 1];
unsigned int i;
for (i = 0; i < GPTPARTNAMESIZE && gp[pn].gp_name[i] != 0; i++)
name[i] = letoh16(gp[pn].gp_name[i]) & 0x7F;
name[i] = '\0';
return name;
}
int
gpt_chk_mbr(struct dos_partition *dp, u_int64_t dsize)
{
struct dos_partition *dp2;
int efi, eficnt, found, i;
uint32_t psize;
found = efi = eficnt = 0;
for (dp2 = dp, i = 0; i < NDOSPART; i++, dp2++) {
if (dp2->dp_typ == DOSPTYP_UNUSED)
continue;
found++;
if (dp2->dp_typ != DOSPTYP_EFI)
continue;
if (letoh32(dp2->dp_start) != GPTSECTOR)
continue;
psize = letoh32(dp2->dp_size);
if (psize <= (dsize - GPTSECTOR) || psize == UINT32_MAX) {
efi = i;
eficnt++;
}
}
if (found == 1 && eficnt == 1)
return efi;
return -1;
}
int
protective_mbr(const struct mbr *mbr)
{
struct dos_partition dp[NDOSPART], dos_partition;
unsigned int i;
if (mbr->mbr_lba_self != 0)
return -1;
for (i = 0; i < nitems(dp); i++) {
memset(&dos_partition, 0, sizeof(dos_partition));
if (i < nitems(mbr->mbr_prt))
PRT_prt_to_dp(&mbr->mbr_prt[i], mbr->mbr_lba_self,
mbr->mbr_lba_firstembr, &dos_partition);
memcpy(&dp[i], &dos_partition, sizeof(dp[i]));
}
return gpt_chk_mbr(dp, DL_GETDSIZE(&dl));
}
int
get_header(const uint64_t sector)
{
struct gpt_header legh;
uint64_t gpbytes, gpsectors, lba_end;
if (DISK_readbytes(&legh, sector, sizeof(legh)))
return -1;
gh.gh_sig = letoh64(legh.gh_sig);
if (gh.gh_sig != GPTSIGNATURE) {
DPRINTF("gpt signature: expected 0x%llx, got 0x%llx\n",
GPTSIGNATURE, gh.gh_sig);
return -1;
}
gh.gh_rev = letoh32(legh.gh_rev);
if (gh.gh_rev != GPTREVISION) {
DPRINTF("gpt revision: expected 0x%x, got 0x%x\n",
GPTREVISION, gh.gh_rev);
return -1;
}
gh.gh_lba_self = letoh64(legh.gh_lba_self);
if (gh.gh_lba_self != sector) {
DPRINTF("gpt self lba: expected %llu, got %llu\n",
sector, gh.gh_lba_self);
return -1;
}
gh.gh_size = letoh32(legh.gh_size);
if (gh.gh_size != GPTMINHDRSIZE) {
DPRINTF("gpt header size: expected %u, got %u\n",
GPTMINHDRSIZE, gh.gh_size);
return -1;
}
gh.gh_part_size = letoh32(legh.gh_part_size);
if (gh.gh_part_size != GPTMINPARTSIZE) {
DPRINTF("gpt partition size: expected %u, got %u\n",
GPTMINPARTSIZE, gh.gh_part_size);
return -1;
}
if ((dl.d_secsize % gh.gh_part_size) != 0) {
DPRINTF("gpt sector size %% partition size (%u %% %u) != 0\n",
dl.d_secsize, gh.gh_part_size);
return -1;
}
gh.gh_part_num = letoh32(legh.gh_part_num);
if (gh.gh_part_num > NGPTPARTITIONS) {
DPRINTF("gpt partition count: expected <= %u, got %u\n",
NGPTPARTITIONS, gh.gh_part_num);
return -1;
}
gh.gh_csum = letoh32(legh.gh_csum);
legh.gh_csum = 0;
legh.gh_csum = crc32((unsigned char *)&legh, gh.gh_size);
if (legh.gh_csum != gh.gh_csum) {
DPRINTF("gpt header checksum: expected 0x%x, got 0x%x\n",
legh.gh_csum, gh.gh_csum);
if (swap32(legh.gh_csum) != gh.gh_csum)
return -1;
}
gpbytes = gh.gh_part_num * gh.gh_part_size;
gpsectors = (gpbytes + dl.d_secsize - 1) / dl.d_secsize;
lba_end = DL_GETDSIZE(&dl) - gpsectors - 2;
gh.gh_lba_end = letoh64(legh.gh_lba_end);
if (gh.gh_lba_end > lba_end) {
DPRINTF("gpt last usable LBA: reduced from %llu to %llu\n",
gh.gh_lba_end, lba_end);
gh.gh_lba_end = lba_end;
}
gh.gh_lba_start = letoh64(legh.gh_lba_start);
if (gh.gh_lba_start >= gh.gh_lba_end) {
DPRINTF("gpt first usable LBA: expected < %llu, got %llu\n",
gh.gh_lba_end, gh.gh_lba_start);
return -1;
}
gh.gh_part_lba = letoh64(legh.gh_part_lba);
if (gh.gh_lba_self == GPTSECTOR) {
if (gh.gh_part_lba <= GPTSECTOR) {
DPRINTF("gpt partition entries start: expected > %u, "
"got %llu\n", GPTSECTOR, gh.gh_part_lba);
return -1;
}
if (gh.gh_part_lba + gpsectors > gh.gh_lba_start) {
DPRINTF("gpt partition entries end: expected < %llu, "
"got %llu\n", gh.gh_lba_start,
gh.gh_part_lba + gpsectors);
return -1;
}
} else {
if (gh.gh_part_lba <= gh.gh_lba_end) {
DPRINTF("gpt partition entries start: expected > %llu, "
"got %llu\n", gh.gh_lba_end, gh.gh_part_lba);
return -1;
}
if (gh.gh_part_lba + gpsectors > gh.gh_lba_self) {
DPRINTF("gpt partition entries end: expected < %llu, "
"got %llu\n", gh.gh_lba_self,
gh.gh_part_lba + gpsectors);
return -1;
}
}
gh.gh_lba_alt = letoh32(legh.gh_lba_alt);
gh.gh_part_csum = letoh32(legh.gh_part_csum);
gh.gh_rsvd = letoh32(legh.gh_rsvd);
uuid_dec_le(&legh.gh_guid, &gh.gh_guid);
return 0;
}
int
get_partition_table(void)
{
struct gpt_partition *legp;
uint64_t gpbytes;
unsigned int pn;
int rslt = -1;
uint32_t gh_part_csum;
DPRINTF("gpt partition table being read from LBA %llu\n",
gh.gh_part_lba);
gpbytes = gh.gh_part_num * gh.gh_part_size;
legp = calloc(1, gpbytes);
if (legp == NULL)
err(1, "legp");
if (DISK_readbytes(legp, gh.gh_part_lba, gpbytes))
goto done;
gh_part_csum = crc32((unsigned char *)legp, gpbytes);
if (gh_part_csum != gh.gh_part_csum) {
DPRINTF("gpt partition table checksum: expected 0x%x, "
"got 0x%x\n", gh.gh_part_csum, gh_part_csum);
if (swap32(gh_part_csum) != gh.gh_part_csum)
goto done;
}
memset(&gp, 0, sizeof(gp));
for (pn = 0; pn < gh.gh_part_num; pn++) {
uuid_dec_le(&legp[pn].gp_type, &gp[pn].gp_type);
uuid_dec_le(&legp[pn].gp_guid, &gp[pn].gp_guid);
gp[pn].gp_lba_start = letoh64(legp[pn].gp_lba_start);
gp[pn].gp_lba_end = letoh64(legp[pn].gp_lba_end);
gp[pn].gp_attrs = letoh64(legp[pn].gp_attrs);
memcpy(gp[pn].gp_name, legp[pn].gp_name,
sizeof(gp[pn].gp_name));
}
rslt = 0;
done:
free(legp);
return rslt;
}
void
print_free(const uint64_t start, const uint64_t end, const char *units)
{
float size;
const struct unit_type *ut;
size = units_size(units, end - start + 1, &ut);
printf("%4s: Free%-32s [%12llu: %12.0f%s]\n", "", "", start, size,
ut->ut_abbr);
}
int
GPT_recover_partition(const char *line1, const char *line2, const char *line3)
{
char type[37], guid[37], name[37], name2[37];
struct uuid type_uuid, guid_uuid;
const char *p;
uint64_t start, size, end, attrs, attrs2;
unsigned int pn;
int error, fields;
unsigned int i;
if (line1 == NULL) {
error = get_header(GPTSECTOR);
if (error != 0 || get_partition_table() != 0)
error = get_header(DL_GETDSIZE(&dl) - 1);
if (error == 0)
error = get_partition_table();
return error;
}
fields = sscanf(line1, "%u: %36[^[] [%llu:%llu] 0x%llx %36[^\n]", &pn,
type, &start, &size, &attrs, name);
switch (fields) {
case 4:
attrs = 0;
memset(name, 0, sizeof(name));
break;
case 5:
memset(name, 0, sizeof(name));
break;
case 6:
break;
default:
return -1;
}
fields = sscanf(line2, "%36s %36[^\n]", guid, name2);
switch (fields) {
case 0:
case EOF:
memset(guid, 0, sizeof(guid));
break;
case 1:
break;
case 2:
memcpy(name, name2, sizeof(name));
break;
}
fields = sscanf(line3, "Attributes: (0x%llx)", &attrs2);
switch (fields) {
case 0:
case EOF:
break;
case 1:
attrs = attrs2;
break;
}
if (string_to_uuid(type, &type_uuid) != uuid_s_ok) {
for (i = strlen(type); i > 0; i--) {
if (!isspace((unsigned char)type[i - 1]))
break;
type[i - 1] = '\0';
}
if ((p = PRT_desc_to_guid(type)) == NULL)
return -1;
if (string_to_uuid(p, &type_uuid) != uuid_s_ok)
return -1;
}
if (string_to_uuid(guid, &guid_uuid) != uuid_s_ok)
return -1;
if (uuid_is_nil(&guid_uuid, NULL))
uuid_create(&guid_uuid, NULL);
if (start == 0) {
if (lba_free(&start, NULL) == -1)
return -1;
if (start % BLOCKALIGNMENT)
start += (BLOCKALIGNMENT - start % BLOCKALIGNMENT);
}
end = start + size - 1;
if (pn >= nitems(gp) || start < gh.gh_lba_start ||
end > gh.gh_lba_end || size == 0)
return -1;
if (PRT_protected_uuid(&gp[pn].gp_type) ||
(gp[pn].gp_attrs & GPTPARTATTR_REQUIRED))
return -1;
for (i = 0; i < gh.gh_part_num; i++) {
if (i == pn)
continue;
if (start >= gp[i].gp_lba_start && start <= gp[i].gp_lba_end)
return -1;
if (end >= gp[i].gp_lba_start && end <= gp[i].gp_lba_end)
return -1;
}
gp[pn].gp_type = type_uuid;
gp[pn].gp_guid = guid_uuid;
gp[pn].gp_lba_start = start;
gp[pn].gp_lba_end = end;
gp[pn].gp_attrs = attrs;
string_to_name(pn, name);
return 0;
}
int
GPT_read(const int which)
{
int error;
error = MBR_read(0, 0, &gmbr);
if (error)
goto done;
error = protective_mbr(&gmbr);
if (error == -1)
goto done;
switch (which) {
case PRIMARYGPT:
error = get_header(GPTSECTOR);
break;
case SECONDARYGPT:
error = get_header(DL_GETDSIZE(&dl) - 1);
break;
case ANYGPT:
error = get_header(GPTSECTOR);
if (error != 0 || get_partition_table() != 0)
error = get_header(DL_GETDSIZE(&dl) - 1);
break;
default:
return -1;
}
if (error == 0)
error = get_partition_table();
done:
if (error != 0) {
memset(&gmbr, 0, sizeof(gmbr));
memset(&gh, 0, sizeof(gh));
memset(&gp, 0, sizeof(gp));
}
return error;
}
void
GPT_print(const char *units)
{
const struct gpt_partition * const *sgp;
const struct unit_type *ut;
const int secsize = dl.d_secsize;
char *guidstr = NULL;
double size;
uint64_t bs, nextbs;
unsigned int i, pn;
uint32_t status;
#ifdef DEBUG
char *p;
uint64_t sig;
sig = htole64(gh.gh_sig);
p = (char *)&sig;
printf("gh_sig : ");
for (i = 0; i < sizeof(sig); i++)
printf("%c", isprint((unsigned char)p[i]) ? p[i] : '?');
printf(" (");
for (i = 0; i < sizeof(sig); i++) {
printf("%02x", p[i]);
if ((i + 1) < sizeof(sig))
printf(":");
}
printf(")\n");
printf("gh_rev : %u\n", gh.gh_rev);
printf("gh_size : %u (%zd)\n", gh.gh_size, sizeof(gh));
printf("gh_csum : 0x%x\n", gh.gh_csum);
printf("gh_rsvd : %u\n", gh.gh_rsvd);
printf("gh_lba_self : %llu\n", gh.gh_lba_self);
printf("gh_lba_alt : %llu\n", gh.gh_lba_alt);
printf("gh_lba_start : %llu\n", gh.gh_lba_start);
printf("gh_lba_end : %llu\n", gh.gh_lba_end);
p = NULL;
uuid_to_string(&gh.gh_guid, &p, &status);
printf("gh_gh_guid : %s\n", (status == uuid_s_ok) ? p : "<invalid>");
free(p);
printf("gh_gh_part_lba : %llu\n", gh.gh_part_lba);
printf("gh_gh_part_num : %u (%zu)\n", gh.gh_part_num, nitems(gp));
printf("gh_gh_part_size: %u (%zu)\n", gh.gh_part_size, sizeof(gp[0]));
printf("gh_gh_part_csum: 0x%x\n", gh.gh_part_csum);
printf("\n");
#endif
size = units_size(units, DL_GETDSIZE(&dl), &ut);
printf("Disk: %s\tUsable LBA: %llu to %llu [%.0f ",
disk.dk_name, gh.gh_lba_start, gh.gh_lba_end, size);
if (ut->ut_conversion == 0 && secsize != DEV_BSIZE)
printf("%d-byte ", secsize);
printf("%s]\n", ut->ut_lname);
if (verbosity == VERBOSE) {
printf("GUID: ");
uuid_to_string(&gh.gh_guid, &guidstr, &status);
if (status == uuid_s_ok)
printf("%s\n", guidstr);
else
printf("<invalid header GUID>\n");
free(guidstr);
}
GPT_print_parthdr();
sgp = sort_gpt();
bs = gh.gh_lba_start;
for (i = 0; sgp && sgp[i] != NULL; i++) {
for (pn = 0; pn < nitems(gp); pn++) {
if (&gp[pn] == sgp[i]) {
nextbs = gp[pn].gp_lba_start;
if (nextbs > bs)
print_free(bs, nextbs - 1, units);
GPT_print_part(pn, units);
bs = gp[pn].gp_lba_end + 1;
}
}
}
if (bs < gh.gh_lba_end)
print_free(bs, gh.gh_lba_end, units);
}
void
GPT_print_parthdr(void)
{
printf(" #: type "
" [ start: size ]\n");
if (verbosity == VERBOSE)
printf(" guid name\n");
printf("--------------------------------------------------------"
"----------------\n");
}
void
GPT_print_part(const unsigned int pn, const char *units)
{
const struct unit_type *ut;
char *guidstr = NULL;
double size;
uint64_t attrs, end, start;
uint32_t status;
start = gp[pn].gp_lba_start;
end = gp[pn].gp_lba_end;
size = units_size(units, (start > end) ? 0 : end - start + 1, &ut);
printf(" %3u: %-36s [%12lld: %12.0f%s]\n", pn,
PRT_uuid_to_desc(&gp[pn].gp_type, 0), start, size, ut->ut_abbr);
if (verbosity == VERBOSE) {
uuid_to_string(&gp[pn].gp_guid, &guidstr, &status);
if (status != uuid_s_ok)
printf(" <invalid partition guid> ");
else
printf(" %-36s ", guidstr);
printf("%s\n", name_to_string(pn));
free(guidstr);
attrs = gp[pn].gp_attrs;
if (attrs) {
printf(" Attributes: (0x%016llx) ", attrs);
if (attrs & GPTPARTATTR_REQUIRED)
printf("Required " );
if (attrs & GPTPARTATTR_IGNORE)
printf("Ignore ");
if (attrs & GPTPARTATTR_BOOTABLE)
printf("Bootable ");
if (attrs & GPTPARTATTR_MS_READONLY)
printf("MSReadOnly " );
if (attrs & GPTPARTATTR_MS_SHADOW)
printf("MSShadow ");
if (attrs & GPTPARTATTR_MS_HIDDEN)
printf("MSHidden ");
if (attrs & GPTPARTATTR_MS_NOAUTOMOUNT)
printf("MSNoAutoMount ");
printf("\n");
}
}
if (uuid_is_nil(&gp[pn].gp_type, NULL) == 0) {
if (start > end)
printf("partition %u first LBA is > last LBA\n", pn);
if (start < gh.gh_lba_start || end > gh.gh_lba_end)
printf("partition %u extends beyond usable LBA range "
"of %s\n", pn, disk.dk_name);
}
}
int
find_partition(const uint8_t *beuuid)
{
struct uuid uuid;
unsigned int pn;
uuid_dec_be(beuuid, &uuid);
for (pn = 0; pn < gh.gh_part_num; pn++) {
if (uuid_compare(&gp[pn].gp_type, &uuid, NULL) == 0)
return pn;
}
return -1;
}
int
add_partition(const uint8_t *beuuid, const char *name, uint64_t sectors)
{
struct uuid uuid;
int rslt;
uint64_t end, freesectors, start;
uint32_t status, pn;
uuid_dec_be(beuuid, &uuid);
for (pn = 0; pn < gh.gh_part_num; pn++) {
if (uuid_is_nil(&gp[pn].gp_type, NULL))
break;
}
if (pn == gh.gh_part_num)
goto done;
rslt = lba_free(&start, &end);
if (rslt == -1)
goto done;
if (start % BLOCKALIGNMENT)
start += (BLOCKALIGNMENT - start % BLOCKALIGNMENT);
if (start >= end)
goto done;
freesectors = end - start + 1;
if (sectors == 0)
sectors = freesectors;
if (freesectors < sectors)
goto done;
else if (freesectors > sectors)
end = start + sectors - 1;
gp[pn].gp_type = uuid;
gp[pn].gp_lba_start = start;
gp[pn].gp_lba_end = end;
string_to_name(pn, name);
uuid_create(&gp[pn].gp_guid, &status);
if (status == uuid_s_ok)
return 0;
done:
if (pn != gh.gh_part_num)
memset(&gp[pn], 0, sizeof(gp[pn]));
printf("unable to add %s\n", name);
return -1;
}
int
init_gh(void)
{
struct gpt_header oldgh;
const int secsize = dl.d_secsize;
int needed;
uint32_t status;
memcpy(&oldgh, &gh, sizeof(oldgh));
memset(&gh, 0, sizeof(gh));
memset(&gmbr, 0, sizeof(gmbr));
memcpy(gmbr.mbr_code, default_dmbr.dmbr_boot, sizeof(gmbr.mbr_code));
gmbr.mbr_prt[0].prt_id = DOSPTYP_EFI;
gmbr.mbr_prt[0].prt_bs = 1;
gmbr.mbr_prt[0].prt_ns = UINT32_MAX;
gmbr.mbr_signature = DOSMBR_SIGNATURE;
needed = sizeof(gp) / secsize + 2;
if (needed % BLOCKALIGNMENT)
needed += (needed - (needed % BLOCKALIGNMENT));
gh.gh_sig = GPTSIGNATURE;
gh.gh_rev = GPTREVISION;
gh.gh_size = GPTMINHDRSIZE;
gh.gh_csum = 0;
gh.gh_rsvd = 0;
gh.gh_lba_self = 1;
gh.gh_lba_alt = DL_GETDSIZE(&dl) - 1;
gh.gh_lba_start = needed;
gh.gh_lba_end = DL_GETDSIZE(&dl) - needed;
uuid_create(&gh.gh_guid, &status);
if (status != uuid_s_ok) {
memcpy(&gh, &oldgh, sizeof(gh));
return -1;
}
gh.gh_part_lba = 2;
gh.gh_part_num = NGPTPARTITIONS;
gh.gh_part_size = GPTMINPARTSIZE;
gh.gh_part_csum = 0;
return 0;
}
int
init_gp(const int how)
{
struct gpt_partition oldgp[NGPTPARTITIONS];
const uint8_t gpt_uuid_efi_system[] = GPT_UUID_EFI_SYSTEM;
const uint8_t gpt_uuid_openbsd[] = GPT_UUID_OPENBSD;
uint64_t prt_ns;
int pn, rslt;
memcpy(&oldgp, &gp, sizeof(oldgp));
if (how == GHANDGP)
memset(&gp, 0, sizeof(gp));
else {
for (pn = 0; pn < gh.gh_part_num; pn++) {
if (PRT_protected_uuid(&gp[pn].gp_type) ||
(gp[pn].gp_attrs & GPTPARTATTR_REQUIRED))
continue;
memset(&gp[pn], 0, sizeof(gp[pn]));
}
}
rslt = 0;
if (disk.dk_bootprt.prt_ns > 0) {
pn = find_partition(gpt_uuid_efi_system);
if (pn == -1) {
rslt = add_partition(gpt_uuid_efi_system,
"EFI System Area", disk.dk_bootprt.prt_ns);
} else {
prt_ns = gp[pn].gp_lba_end - gp[pn].gp_lba_start + 1;
if (prt_ns < disk.dk_bootprt.prt_ns) {
printf("EFI System Area < %llu sectors\n",
disk.dk_bootprt.prt_ns);
rslt = -1;
}
}
}
if (rslt == 0)
rslt = add_partition(gpt_uuid_openbsd, "OpenBSD Area", 0);
if (rslt != 0)
memcpy(&gp, &oldgp, sizeof(gp));
return rslt;
}
int
GPT_init(const int how)
{
int rslt = 0;
if (how == GHANDGP)
rslt = init_gh();
if (rslt == 0)
rslt = init_gp(how);
return rslt;
}
void
GPT_zap_headers(void)
{
struct gpt_header legh;
if (DISK_readbytes(&legh, GPTSECTOR, sizeof(legh)))
return;
if (letoh64(legh.gh_sig) == GPTSIGNATURE) {
memset(&legh, 0, sizeof(legh));
if (DISK_writebytes(&legh, GPTSECTOR, sizeof(legh)))
DPRINTF("Unable to zap GPT header @ sector %d",
GPTSECTOR);
}
if (DISK_readbytes(&legh, DL_GETDSIZE(&dl) - 1, sizeof(legh)))
return;
if (letoh64(legh.gh_sig) == GPTSIGNATURE) {
memset(&legh, 0, GPTMINHDRSIZE);
if (DISK_writebytes(&legh, DL_GETDSIZE(&dl) - 1, sizeof(legh)))
DPRINTF("Unable to zap GPT header @ sector %llu",
DL_GETDSIZE(&dl) - 1);
}
}
int
GPT_write(void)
{
struct gpt_header legh;
struct gpt_partition *legp;
uint64_t altgh, altgp;
uint64_t gpbytes, gpsectors;
unsigned int pn;
int rslt = -1;
if (MBR_write(&gmbr))
return -1;
gpbytes = gh.gh_part_num * gh.gh_part_size;
gpsectors = (gpbytes + dl.d_secsize - 1) / dl.d_secsize;
altgh = DL_GETDSIZE(&dl) - 1;
altgp = altgh - gpsectors;
legh.gh_sig = htole64(GPTSIGNATURE);
legh.gh_rev = htole32(GPTREVISION);
legh.gh_size = htole32(GPTMINHDRSIZE);
legh.gh_rsvd = 0;
legh.gh_lba_self = htole64(GPTSECTOR);
legh.gh_lba_alt = htole64(altgh);
legh.gh_lba_start = htole64(gh.gh_lba_start);
legh.gh_lba_end = htole64(gh.gh_lba_end);
uuid_enc_le(&legh.gh_guid, &gh.gh_guid);
legh.gh_part_lba = htole64(GPTSECTOR + 1);
legh.gh_part_num = htole32(gh.gh_part_num);
legh.gh_part_size = htole32(GPTMINPARTSIZE);
legp = calloc(1, gpbytes);
if (legp == NULL)
err(1, "legp");
for (pn = 0; pn < gh.gh_part_num; pn++) {
uuid_enc_le(&legp[pn].gp_type, &gp[pn].gp_type);
uuid_enc_le(&legp[pn].gp_guid, &gp[pn].gp_guid);
legp[pn].gp_lba_start = htole64(gp[pn].gp_lba_start);
legp[pn].gp_lba_end = htole64(gp[pn].gp_lba_end);
legp[pn].gp_attrs = htole64(gp[pn].gp_attrs);
memcpy(legp[pn].gp_name, gp[pn].gp_name,
sizeof(legp[pn].gp_name));
}
legh.gh_part_csum = htole32(crc32((unsigned char *)legp, gpbytes));
legh.gh_csum = 0;
legh.gh_csum = htole32(crc32((unsigned char *)&legh, gh.gh_size));
if (DISK_writebytes(&legh, GPTSECTOR, gh.gh_size) ||
DISK_writebytes(legp, GPTSECTOR + 1, gpbytes))
goto done;
legh.gh_lba_self = htole64(altgh);
legh.gh_lba_alt = htole64(GPTSECTOR);
legh.gh_part_lba = htole64(altgp);
legh.gh_csum = 0;
legh.gh_csum = htole32(crc32((unsigned char *)&legh, gh.gh_size));
if (DISK_writebytes(&legh, altgh, gh.gh_size) ||
DISK_writebytes(&gp, altgp, gpbytes))
goto done;
if (ioctl(disk.dk_fd, DIOCRLDINFO, 0) == -1)
warn("DIOCRLDINFO");
rslt = 0;
done:
free(legp);
return rslt;
}
int
gp_lba_start_cmp(const void *e1, const void *e2)
{
struct gpt_partition *p1 = *(struct gpt_partition **)e1;
struct gpt_partition *p2 = *(struct gpt_partition **)e2;
uint64_t o1;
uint64_t o2;
o1 = p1->gp_lba_start;
o2 = p2->gp_lba_start;
if (o1 < o2)
return -1;
else if (o1 > o2)
return 1;
else
return 0;
}
const struct gpt_partition * const *
sort_gpt(void)
{
static const struct gpt_partition *sgp[NGPTPARTITIONS+2];
unsigned int i, pn;
memset(sgp, 0, sizeof(sgp));
i = 0;
for (pn = 0; pn < gh.gh_part_num; pn++) {
if (gp[pn].gp_lba_start >= gh.gh_lba_start)
sgp[i++] = &gp[pn];
}
if (i > 1) {
if (mergesort(sgp, i, sizeof(sgp[0]), gp_lba_start_cmp) == -1) {
printf("unable to sort gpt by lba start\n");
return NULL;
}
}
return sgp;
}
int
lba_free(uint64_t *start, uint64_t *end)
{
const struct gpt_partition * const *sgp;
uint64_t bs, bigbs, nextbs, ns;
unsigned int i;
sgp = sort_gpt();
if (sgp == NULL)
return -1;
bs = gh.gh_lba_start;
ns = gh.gh_lba_end - bs + 1;
if (sgp[0] != NULL) {
bigbs = bs;
ns = 0;
for (i = 0; sgp[i] != NULL; i++) {
nextbs = sgp[i]->gp_lba_start;
if (bs < nextbs && ns < nextbs - bs) {
ns = nextbs - bs;
bigbs = bs;
}
bs = sgp[i]->gp_lba_end + 1;
}
nextbs = gh.gh_lba_end + 1;
if (bs < nextbs && ns < nextbs - bs) {
ns = nextbs - bs;
bigbs = bs;
}
bs = bigbs;
}
if (ns == 0)
return -1;
if (start != NULL)
*start = bs;
if (end != NULL)
*end = bs + ns - 1;
return 0;
}
int
GPT_get_lba_start(const unsigned int pn)
{
uint64_t bs;
unsigned int i;
int rslt;
bs = gh.gh_lba_start;
if (gp[pn].gp_lba_start >= bs) {
bs = gp[pn].gp_lba_start;
} else {
rslt = lba_free(&bs, NULL);
if (rslt == -1) {
printf("no space for partition %u\n", pn);
return -1;
}
}
bs = getuint64("Partition offset", bs, gh.gh_lba_start, gh.gh_lba_end);
for (i = 0; i < gh.gh_part_num; i++) {
if (i == pn)
continue;
if (bs >= gp[i].gp_lba_start && bs <= gp[i].gp_lba_end) {
printf("partition %u can't start inside partition %u\n",
pn, i);
return -1;
}
}
gp[pn].gp_lba_start = bs;
return 0;
}
int
GPT_get_lba_end(const unsigned int pn)
{
const struct gpt_partition * const *sgp;
uint64_t bs, nextbs, ns;
unsigned int i;
sgp = sort_gpt();
if (sgp == NULL)
return -1;
bs = gp[pn].gp_lba_start;
ns = gh.gh_lba_end - bs + 1;
for (i = 0; sgp[i] != NULL; i++) {
nextbs = sgp[i]->gp_lba_start;
if (nextbs > bs) {
ns = nextbs - bs;
break;
}
}
ns = getuint64("Partition size", ns, 1, ns);
gp[pn].gp_lba_end = bs + ns - 1;
return 0;
}
int
GPT_get_name(const unsigned int pn)
{
char name[GPTPARTNAMESIZE + 1];
printf("Partition name: [%s] ", name_to_string(pn));
string_from_line(name, sizeof(name), UNTRIMMED);
switch (strlen(name)) {
case 0:
break;
case GPTPARTNAMESIZE:
printf("partition name must be < %d characters\n",
GPTPARTNAMESIZE);
return -1;
default:
string_to_name(pn, name);
break;
}
return 0;
}
uint32_t
crc32(const u_char *buf, const uint32_t size)
{
int j;
uint32_t i, byte, crc, mask;
crc = 0xFFFFFFFF;
for (i = 0; i < size; i++) {
byte = buf[i];
crc = crc ^ byte;
for (j = 7; j >= 0; j--) {
mask = -(crc & 1);
crc = (crc >> 1) ^ (0xEDB88320 & mask);
}
}
return ~crc;
}
