int get_partition_info_efi(block_dev_desc_t * dev_desc, int part,
disk_partition_t * info)
{
ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
gpt_entry *gpt_pte = NULL;
/* "part" argument must be at least 1 */
if (!dev_desc || !info || part < 1) {
printf("%s: Invalid Argument(s)\n", __func__);
return -1;
}
/* This function validates AND fills in the GPT header and PTE */
if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
gpt_head, &gpt_pte) != 1) {
printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
gpt_head, &gpt_pte) != 1) {
printf("%s: *** ERROR: Invalid Backup GPT ***\n",
__func__);
return -1;
} else {
printf("%s: *** Using Backup GPT ***\n",
__func__);
}
}
if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
!is_pte_valid(&gpt_pte[part - 1])) {
debug("%s: *** ERROR: Invalid partition number %d ***\n",
__func__, part);
free(gpt_pte);
return -1;
}
/* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba);
/* The ending LBA is inclusive, to calculate size, add 1 to it */
info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1
- info->start;
info->blksz = dev_desc->blksz;
sprintf((char *)info->name, "%s",
print_efiname(&gpt_pte[part - 1]));
sprintf((char *)info->type, "U-Boot");
info->bootable = is_bootable(&gpt_pte[part - 1]);
#ifdef CONFIG_PARTITION_UUIDS
uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
UUID_STR_FORMAT_GUID);
#endif
debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__,
info->start, info->size, info->name);
/* Remember to free pte */
free(gpt_pte);
return 0;
}
void print_part_efi(block_dev_desc_t * dev_desc)
{
ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
gpt_entry *gpt_pte = NULL;
int i = 0;
char uuid[37];
unsigned char *uuid_bin;
if (!dev_desc) {
printf("%s: Invalid Argument(s)\n", __func__);
return;
}
/* This function validates AND fills in the GPT header and PTE */
if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
gpt_head, &gpt_pte) != 1) {
printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
gpt_head, &gpt_pte) != 1) {
printf("%s: *** ERROR: Invalid Backup GPT ***\n",
__func__);
return;
} else {
printf("%s: *** Using Backup GPT ***\n",
__func__);
}
}
debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
printf("Part\tStart LBA\tEnd LBA\t\tName\n");
printf("\tAttributes\n");
printf("\tType GUID\n");
printf("\tPartition GUID\n");
for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) {
/* Stop at the first non valid PTE */
if (!is_pte_valid(&gpt_pte[i]))
break;
printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
le64_to_cpu(gpt_pte[i].starting_lba),
le64_to_cpu(gpt_pte[i].ending_lba),
print_efiname(&gpt_pte[i]));
printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
uuid_bin = (unsigned char *)gpt_pte[i].partition_type_guid.b;
uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
printf("\ttype:\t%s\n", uuid);
uuid_bin = (unsigned char *)gpt_pte[i].unique_partition_guid.b;
uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
printf("\tguid:\t%s\n", uuid);
}
/* Remember to free pte */
free(gpt_pte);
return;
}
int get_partition_info_efi_with_partnum(block_dev_desc_t * dev_desc, int part,
disk_partition_t * info, unsigned long total, unsigned long sdidx, int sdpart, disk_partition_t *sdinfo)
{
gpt_header gpt_head;
gpt_entry *pgpt_pte = NULL;
/* "part" argument must be at least 1 */
if (!dev_desc || !info || part < 1) {
printf("%s: Invalid Argument(s)\n", __FUNCTION__);
return -1;
}
/* This function validates AND fills in the GPT header and PTE */
if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
&(gpt_head), &pgpt_pte) != 1) {
printf("%s: *** ERROR: Invalid Main GPT ***\n", __FUNCTION__);
if(is_gpt_valid(dev_desc, dev_desc->lba -1, &(gpt_head), &pgpt_pte) != 1){
printf("%s: *** ERROR: Invalid alternate GPT ***\n", __FUNCTION__);
return -1;
}
}
/* The ulong casting limits the maximum disk size to 2 TB */
info->start = (ulong) le64_to_int((pgpt_pte)[part - 1].starting_lba);
/* The ending LBA is inclusive, to calculate size, add 1 to it */
info->size = ((ulong)le64_to_int((pgpt_pte)[part - 1].ending_lba) + 1)
- info->start;
info->blksz = GPT_BLOCK_SIZE;
sprintf((char *)info->name, "%s%d", GPT_ENTRY_NAME, part);
sprintf((char *)info->type, "U-Boot");
debug("%s: start 0x%lX, size 0x%lX, name %s", __FUNCTION__,
info->start, info->size, info->name);
/* copy sd info */
if (sdidx < (le32_to_int(gpt_head.num_partition_entries))) {
sdinfo->start = (ulong) le64_to_int((pgpt_pte)[sdpart - 1].starting_lba);
sdinfo->size = ((ulong)le64_to_int((pgpt_pte)[sdpart - 1].ending_lba) + 1) - sdinfo->start;
}
/* Remember to free pte */
if (pgpt_pte != NULL) {
debug("%s: Freeing pgpt_pte\n", __FUNCTION__);
free(pgpt_pte);
}
if (total == 0)
return 0;
else if (total != le32_to_int(gpt_head.num_partition_entries))
return -1;
else
return 0;
}
int get_partition_num_efi(block_dev_desc_t *dev_desc)
{
ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
gpt_entry *gpt_pte = NULL;
int i;
if (!dev_desc) {
printf("%s: Invalid Argument(s)\n", __func__);
return 0;
}
/* This function validates AND fills in the GPT header and PTE */
if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
gpt_head, &gpt_pte) != 1) {
printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
return 0;
}
for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++)
if (!is_pte_valid(&gpt_pte[i]))
break;
/* Remember to free pte */
free(gpt_pte);
return i;
}
int find_part_efi(block_dev_desc_t * dev_desc, char *name, disk_partition_t * info)
{
ALLOC_CACHE_ALIGN_BUFFER(gpt_header, gpt_head, 1);
gpt_entry *gpt_pte = NULL;
int i = 0, pos = 0;
/* "part" argument must be at least 1 */
if (!dev_desc || !info ) {
printf("%s: Invalid Argument(s)\n", __func__);
return -1;
}
/* This function validates AND fills in the GPT header and PTE */
if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
gpt_head, &gpt_pte) != 1) {
printf("%s: *** ERROR: Invalid Primary GPT ***\n", __func__);
if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
gpt_head, &gpt_pte) != 1) {
printf("%s: *** ERROR: Invalid Backup GPT ***\n",
__func__);
return -1;
}
}
for (i = 0; i < le32_to_int(gpt_head->num_partition_entries); i++) {
if (is_pte_valid(&gpt_pte[i]) && !(strcmp(name, print_efiname(&gpt_pte[i])))) {
/* The ulong casting limits the maximum disk size to 2 TB */
info->start = (ulong) le64_to_int(gpt_pte[i].starting_lba);
/* The ending LBA is inclusive, to calculate size, add 1 to it */
info->size = ((ulong)le64_to_int(gpt_pte[i].ending_lba) + 1) - info->start;
info->blksz = GPT_BLOCK_SIZE;
sprintf((char *)info->name, "%s",
print_efiname(&gpt_pte[i]));
sprintf((char *)info->type, "U-Boot");
pos = i + 1;
}
}
/* Remember to free pte */
free(gpt_pte);
return pos;
}
int get_partition_info_efi(block_dev_desc_t * dev_desc, int part,
disk_partition_t * info)
{
ALLOC_CACHE_ALIGN_BUFFER(gpt_header, gpt_head, 1);
gpt_entry *gpt_pte = NULL;
/* "part" argument must be at least 1 */
if (!dev_desc || !info || part < 1) {
printf("%s: Invalid Argument(s)\n", __func__);
return -1;
}
/* This function validates AND fills in the GPT header and PTE */
if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
gpt_head, &gpt_pte) != 1) {
printf("%s: *** ERROR: Invalid Primary GPT ***\n", __func__);
if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
gpt_head, &gpt_pte) != 1) {
printf("%s: *** ERROR: Invalid Backup GPT ***\n",
__func__);
return -1;
}
}
/* The ulong casting limits the maximum disk size to 2 TB */
info->start = (ulong) le64_to_int(gpt_pte[part - 1].starting_lba);
/* The ending LBA is inclusive, to calculate size, add 1 to it */
info->size = ((ulong)le64_to_int(gpt_pte[part - 1].ending_lba) + 1)
- info->start;
info->blksz = GPT_BLOCK_SIZE;
sprintf((char *)info->name, "%s",
print_efiname(&gpt_pte[part - 1]));
sprintf((char *)info->type, "U-Boot");
debug("%s: start 0x%lX, size 0x%lX, name %s", __func__,
info->start, info->size, info->name);
/* Remember to free pte */
free(gpt_pte);
return 0;
}
void print_part_efi(block_dev_desc_t * dev_desc)
{
ALLOC_CACHE_ALIGN_BUFFER(gpt_header, gpt_head, 1);
gpt_entry *gpt_pte = NULL;
int i = 0;
if (!dev_desc) {
printf("%s: Invalid Argument(s)\n", __func__);
return;
}
/* This function validates AND fills in the GPT header and PTE */
if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
gpt_head, &gpt_pte) != 1) {
printf("%s: *** ERROR: Invalid Primary GPT ***\n", __func__);
if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
gpt_head, &gpt_pte) != 1) {
printf("%s: *** ERROR: Invalid Backup GPT ***\n",
__func__);
return -1;
}
}
debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
printf("Part\tName\t\t\tStart LBA\tEnd LBA\n");
for (i = 0; i < le32_to_int(gpt_head->num_partition_entries); i++) {
if (is_pte_valid(&gpt_pte[i])) {
printf("%3d\t%-18s\t0x%08llX\t0x%08llX\n", (i + 1),
print_efiname(&gpt_pte[i]),
le64_to_int(gpt_pte[i].starting_lba),
le64_to_int(gpt_pte[i].ending_lba));
} else {
break; /* Stop at the first non valid PTE */
}
}
/* Remember to free pte */
free(gpt_pte);
return;
}
int get_partition_info_efi(block_dev_desc_t * dev_desc, int part,
disk_partition_t * info)
{
gpt_header gpt_head;
gpt_entry *pgpt_pte = NULL;
/* "part" argument must be at least 1 */
if (!dev_desc || !info || part < 1) {
printf("%s: Invalid Argument(s)\n", __FUNCTION__);
return -1;
}
/* This function validates AND fills in the GPT header and PTE */
if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
&(gpt_head), &pgpt_pte) != 1) {
printf("%s: *** ERROR: Invalid GPT ***\n", __FUNCTION__);
return -1;
}
/* valid entry? */
if (part > le32_to_int(gpt_head.num_partition_entries))
return -1;
if (!is_pte_valid(&pgpt_pte[part - 1]))
return -1;
/* The ulong casting limits the maximum disk size to 2 TB */
info->start = (ulong) le64_to_int(pgpt_pte[part - 1].starting_lba);
/* The ending LBA is inclusive, to calculate size, add 1 to it */
info->size = ((ulong)le64_to_int(pgpt_pte[part - 1].ending_lba) + 1)
- info->start;
info->blksz = GPT_BLOCK_SIZE;
sprintf((char *)info->name, "%s%d", GPT_ENTRY_NAME, part);
if (is_pte_env(&pgpt_pte[part - 1]))
sprintf((char *)info->type, BOOT_PART_ENV);
else
sprintf((char *)info->type, BOOT_PART_TYPE);
debug("%s: start 0x%lX, size 0x%lX, name %s", __FUNCTION__,
info->start, info->size, info->name);
/* Remember to free pte */
if (pgpt_pte != NULL) {
debug("%s: Freeing pgpt_pte\n", __FUNCTION__);
free(pgpt_pte);
}
return 0;
}
int get_partition_info_efi(block_dev_desc_t * dev_desc, int part,
disk_partition_t * info)
{
gpt_header gpt_head;
gpt_entry *pgpt_pte;
/* "part" argument must be at least 1 */
if (!dev_desc || !info || part < 1) {
printf("%s: Invalid Argument(s)\n", __FUNCTION__);
return -1;
}
/* This function validates AND fills in the GPT header and PTE */
if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
&(gpt_head), &pgpt_pte) != 1) {
printf("%s: *** ERROR: Invalid GPT ***\n", __FUNCTION__);
return -1;
}
/* "part" argument must be less than the number of partition entries */
if (part > le32_to_int(gpt_head.num_partition_entries))
return -1;
/* The ulong casting limits the maximum disk size to 2 TB */
info->start = (ulong) le64_to_int(pgpt_pte[part - 1].starting_lba);
/* The ending LBA is inclusive, to calculate size, add 1 to it */
info->size = ((ulong)le64_to_int(pgpt_pte[part - 1].ending_lba) + 1)
- info->start;
info->blksz = GPT_BLOCK_SIZE;
unicode2asc(pgpt_pte[part - 1].partition_name,
info->name, sizeof(info->name));
memcpy(info->type,
&pgpt_pte[part - 1].partition_type_guid, sizeof(efi_guid_t));
memcpy(info->type + sizeof(efi_guid_t),
&pgpt_pte[part - 1].unique_partition_guid, sizeof(efi_guid_t));
debug("%s: start 0x%lX, size 0x%lX, name %s", __FUNCTION__,
info->start, info->size, info->name);
/* Remember to free pte */
if (pgpt_pte != NULL) {
debug("%s: Freeing pgpt_pte\n", __FUNCTION__);
free(pgpt_pte);
}
return 0;
}
void print_part_efi(block_dev_desc_t * dev_desc)
{
gpt_header gpt_head;
gpt_entry *pgpt_pte;
int i = 0;
unsigned char name[ARRAY_SIZE(pgpt_pte->partition_name) + 1];
if (!dev_desc) {
printf("%s: Invalid Argument(s)\n", __FUNCTION__);
return;
}
/* This function validates AND fills in the GPT header and PTE */
if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
&(gpt_head), &pgpt_pte) != 1) {
printf("%s: *** ERROR: Invalid GPT ***\n", __FUNCTION__);
return;
}
debug("%s: gpt-entry at 0x%p\n", __func__, pgpt_pte);
printf("Part Start LBA End LBA Name\n");
for (i = 0; i < le32_to_int(gpt_head.num_partition_entries); i++) {
if (is_pte_valid(&pgpt_pte[i])) {
unicode2asc(pgpt_pte[i].partition_name, name,
sizeof(name));
printf("%s%d 0x%08llX 0x%08llX %s\n",
GPT_ENTRY_NAME,
(i + 1),
le64_to_int(pgpt_pte[i].starting_lba),
le64_to_int(pgpt_pte[i].ending_lba),
name);
} else {
break; /* Stop at the first non valid PTE */
}
}
/* Remember to free pte */
if (pgpt_pte != NULL) {
debug("%s: Freeing pgpt_pte\n", __FUNCTION__);
free(pgpt_pte);
}
return;
}
void print_part_efi(block_dev_desc_t * dev_desc)
{
gpt_header gpt_head;
gpt_entry *pgpt_pte = NULL;
int i = 0;
if (!dev_desc) {
printf("%s: Invalid Argument(s)\n", __FUNCTION__);
return;
}
/* This function validates AND fills in the GPT header and PTE */
if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
&(gpt_head), &pgpt_pte) != 1) {
printf("%s: *** ERROR: Invalid GPT ***\n", __FUNCTION__);
return;
}
debug("%s: gpt-entry at 0x%08X\n", __FUNCTION__, (unsigned int)pgpt_pte);
printf("Part Start LBA End LBA\n");
for (i = 0; i < le32_to_int(gpt_head.num_partition_entries); i++) {
if (is_pte_valid(&(pgpt_pte)[i])) {
printf("%s%d 0x%llX 0x%llX\n", GPT_ENTRY_NAME,
(i + 1),
le64_to_int((pgpt_pte)[i].starting_lba),
le64_to_int((pgpt_pte)[i].ending_lba));
} else {
break; /* Stop at the first non valid PTE */
}
}
/* Remember to free pte */
if (pgpt_pte != NULL) {
debug("%s: Freeing pgpt_pte\n", __FUNCTION__);
free(pgpt_pte);
}
return;
}
/**
* find_valid_gpt() - Search disk for valid GPT headers and PTEs
* @state
* @gpt is a GPT header ptr, filled on return.
* @ptes is a PTEs ptr, filled on return.
* Description: Returns 1 if valid, 0 on error.
* If valid, returns pointers to newly allocated GPT header and PTEs.
* Validity depends on PMBR being valid (or being overridden by the
* 'gpt' kernel command line option) and finding either the Primary
* GPT header and PTEs valid, or the Alternate GPT header and PTEs
* valid. If the Primary GPT header is not valid, the Alternate GPT header
* is not checked unless the 'gpt' kernel command line option is passed.
* This protects against devices which misreport their size, and forces
* the user to decide to use the Alternate GPT.
*/
static int find_valid_gpt(struct parsed_partitions *state, gpt_header **gpt,
gpt_entry **ptes)
{
int good_pgpt = 0, good_agpt = 0, good_pmbr = 0;
gpt_header *pgpt = NULL, *agpt = NULL;
gpt_entry *pptes = NULL, *aptes = NULL;
legacy_mbr *legacymbr;
u64 lastlba;
if (!ptes)
return 0;
lastlba = last_lba(state->bdev);
if (!force_gpt) {
/* This will be added to the EFI Spec. per Intel after v1.02. */
legacymbr = kzalloc(sizeof (*legacymbr), GFP_KERNEL);
if (legacymbr) {
read_lba(state, 0, (u8 *) legacymbr,
sizeof (*legacymbr));
good_pmbr = is_pmbr_valid(legacymbr);
// panic before kfree to check the buffer content
if (!good_pmbr && !memcmp(state->pp_buf, " mmcblk0", 8))
BUG_ON(1);
kfree(legacymbr);
}
if (!good_pmbr)
goto fail;
}
good_pgpt = is_gpt_valid(state, GPT_PRIMARY_PARTITION_TABLE_LBA,
&pgpt, &pptes);
if (good_pgpt)
good_agpt = is_gpt_valid(state,
le64_to_cpu(pgpt->alternate_lba),
&agpt, &aptes);
if (!good_agpt && force_gpt)
good_agpt = is_gpt_valid(state, lastlba, &agpt, &aptes);
/* The obviously unsuccessful case */
if (!good_pgpt && !good_agpt)
goto fail;
compare_gpts(pgpt, agpt, lastlba);
/* The good cases */
if (good_pgpt) {
*gpt = pgpt;
*ptes = pptes;
kfree(agpt);
kfree(aptes);
if (!good_agpt) {
printk(KERN_WARNING
"Alternate GPT is invalid, "
"using primary GPT.\n");
}
return 1;
}
else if (good_agpt) {
*gpt = agpt;
*ptes = aptes;
kfree(pgpt);
kfree(pptes);
printk(KERN_WARNING
"Primary GPT is invalid, using alternate GPT.\n");
return 1;
}
fail:
// panic before kfree to check the buffer content
if (!memcmp(state->pp_buf, " mmcblk0", 8))
BUG_ON(1);
kfree(pgpt);
kfree(agpt);
kfree(pptes);
kfree(aptes);
*gpt = NULL;
*ptes = NULL;
return 0;
}
/**
* find_valid_gpt() - Search disk for valid GPT headers and PTEs
* @bdev
* @gpt is a GPT header ptr, filled on return.
* @ptes is a PTEs ptr, filled on return.
* Description: Returns 1 if valid, 0 on error.
* If valid, returns pointers to newly allocated GPT header and PTEs.
* Validity depends on PMBR being valid (or being overridden by the
* 'gpt' kernel command line option) and finding either the Primary
* GPT header and PTEs valid, or the Alternate GPT header and PTEs
* valid. If the Primary GPT header is not valid, the Alternate GPT header
* is not checked unless the 'gpt' kernel command line option is passed.
* This protects against devices which misreport their size, and forces
* the user to decide to use the Alternate GPT.
*/
static int
find_valid_gpt(struct block_device *bdev, gpt_header **gpt, gpt_entry **ptes)
{
int good_pgpt = 0, good_agpt = 0, good_pmbr = 0;
gpt_header *pgpt = NULL, *agpt = NULL;
gpt_entry *pptes = NULL, *aptes = NULL;
legacy_mbr *legacymbr;
u64 lastlba;
if (!bdev || !gpt || !ptes)
return 0;
lastlba = last_lba(bdev);
if (!force_gpt) {
/* This will be added to the EFI Spec. per Intel after v1.02. */
legacymbr = kzalloc(sizeof (*legacymbr), GFP_KERNEL);
if (legacymbr) {
read_lba(bdev, 0, (u8 *) legacymbr,
sizeof (*legacymbr));
good_pmbr = is_pmbr_valid(legacymbr);
kfree(legacymbr);
}
if (!good_pmbr)
goto fail;
}
good_pgpt = is_gpt_valid(bdev, GPT_PRIMARY_PARTITION_TABLE_LBA,
&pgpt, &pptes);
if (good_pgpt)
good_agpt = is_gpt_valid(bdev,
le64_to_cpu(pgpt->alternate_lba),
&agpt, &aptes);
if (!good_agpt && force_gpt)
good_agpt = is_gpt_valid(bdev, lastlba,
&agpt, &aptes);
/* The obviously unsuccessful case */
if (!good_pgpt && !good_agpt)
goto fail;
compare_gpts(pgpt, agpt, lastlba);
/* The good cases */
if (good_pgpt) {
*gpt = pgpt;
*ptes = pptes;
kfree(agpt);
kfree(aptes);
if (!good_agpt) {
printk(KERN_WARNING
"Alternate GPT is invalid, "
"using primary GPT.\n");
}
return 1;
}
else if (good_agpt) {
*gpt = agpt;
*ptes = aptes;
kfree(pgpt);
kfree(pptes);
printk(KERN_WARNING
"Primary GPT is invalid, using alternate GPT.\n");
return 1;
}
fail:
kfree(pgpt);
kfree(agpt);
kfree(pptes);
kfree(aptes);
*gpt = NULL;
*ptes = NULL;
return 0;
}
/**
* find_valid_gpt() - Search disk for valid GPT headers and PTEs
* @fd is an open file descriptor to the whole disk
* @gpt is a GPT header ptr, filled on return.
* @ptes is a PTEs ptr, filled on return.
* Description: Returns 1 if valid, 0 on error.
* If valid, returns pointers to newly allocated GPT header and PTEs.
* Validity depends on finding either the Primary GPT header and PTEs valid,
* or the Alternate GPT header and PTEs valid, and the PMBR valid.
*/
static int
find_valid_gpt(int fd, gpt_header ** gpt, gpt_entry ** ptes)
{
extern int force_gpt;
int good_pgpt = 0, good_agpt = 0, good_pmbr = 0;
gpt_header *pgpt = NULL, *agpt = NULL;
gpt_entry *pptes = NULL, *aptes = NULL;
legacy_mbr *legacymbr = NULL;
uint64_t lastlba;
if (!gpt || !ptes)
return 0;
lastlba = last_lba(fd);
good_pgpt = is_gpt_valid(fd, GPT_PRIMARY_PARTITION_TABLE_LBA,
&pgpt, &pptes);
if (good_pgpt) {
good_agpt = is_gpt_valid(fd,
__le64_to_cpu(pgpt->alternate_lba),
&agpt, &aptes);
if (!good_agpt) {
good_agpt = is_gpt_valid(fd, lastlba,
&agpt, &aptes);
}
}
else {
good_agpt = is_gpt_valid(fd, lastlba,
&agpt, &aptes);
}
/* The obviously unsuccessful case */
if (!good_pgpt && !good_agpt) {
goto fail;
}
/* This will be added to the EFI Spec. per Intel after v1.02. */
legacymbr = malloc(sizeof (*legacymbr));
if (legacymbr) {
memset(legacymbr, 0, sizeof (*legacymbr));
read_lba(fd, 0, (uint8_t *) legacymbr,
sizeof (*legacymbr));
good_pmbr = is_pmbr_valid(legacymbr);
free(legacymbr);
legacymbr=NULL;
}
/* Failure due to bad PMBR */
if ((good_pgpt || good_agpt) && !good_pmbr && !force_gpt) {
fprintf(stderr,
" Warning: Disk has a valid GPT signature "
"but invalid PMBR.\n"
" Assuming this disk is *not* a GPT disk anymore.\n"
" Use gpt kernel option to override. "
"Use GNU Parted to correct disk.\n");
goto fail;
}
/* Would fail due to bad PMBR, but force GPT anyhow */
if ((good_pgpt || good_agpt) && !good_pmbr && force_gpt) {
fprintf(stderr,
" Warning: Disk has a valid GPT signature but "
"invalid PMBR.\n"
" Use GNU Parted to correct disk.\n"
" gpt option taken, disk treated as GPT.\n");
}
compare_gpts(pgpt, agpt, lastlba);
/* The good cases */
if (good_pgpt && (good_pmbr || force_gpt)) {
*gpt = pgpt;
*ptes = pptes;
if (agpt) { free(agpt); agpt = NULL; }
if (aptes) { free(aptes); aptes = NULL; }
if (!good_agpt) {
fprintf(stderr,
"Alternate GPT is invalid, "
"using primary GPT.\n");
}
return 1;
}
else if (good_agpt && (good_pmbr || force_gpt)) {
*gpt = agpt;
*ptes = aptes;
if (pgpt) { free(pgpt); pgpt = NULL; }
if (pptes) { free(pptes); pptes = NULL; }
fprintf(stderr,
"Primary GPT is invalid, using alternate GPT.\n");
return 1;
}
fail:
if (pgpt) { free(pgpt); pgpt=NULL; }
if (agpt) { free(agpt); agpt=NULL; }
if (pptes) { free(pptes); pptes=NULL; }
if (aptes) { free(aptes); aptes=NULL; }
*gpt = NULL;
*ptes = NULL;
return 0;
}
/**
* find_valid_gpt() - Search disk for valid GPT headers and PTEs
* @state
* @gpt is a GPT header ptr, filled on return.
* @ptes is a PTEs ptr, filled on return.
* Description: Returns 1 if valid, 0 on error.
* If valid, returns pointers to newly allocated GPT header and PTEs.
* Validity depends on PMBR being valid (or being overridden by the
* 'gpt' kernel command line option) and finding either the Primary
* GPT header and PTEs valid, or the Alternate GPT header and PTEs
* valid. If the Primary GPT header is not valid, the Alternate GPT header
* is not checked unless the 'gpt' kernel command line option is passed.
* This protects against devices which misreport their size, and forces
* the user to decide to use the Alternate GPT.
*/
static int find_valid_gpt(struct parsed_partitions *state, gpt_header **gpt,
gpt_entry **ptes)
{
int good_pgpt = 0, good_agpt = 0, good_pmbr = 0;
gpt_header *pgpt = NULL, *agpt = NULL;
gpt_entry *pptes = NULL, *aptes = NULL;
legacy_mbr *legacymbr;
u64 lastlba;
if (!ptes)
return 0;
lastlba = last_lba(state->bdev);
#if 0 // merged from msm8960-gb by ZTE_BOOT_JIA_20120105 jia.jia
if (!force_gpt) {
#else
if (force_gpt) {
#endif
/* This will be added to the EFI Spec. per Intel after v1.02. */
legacymbr = kzalloc(sizeof (*legacymbr), GFP_KERNEL);
if (legacymbr) {
read_lba(state, 0, (u8 *) legacymbr,
sizeof (*legacymbr));
good_pmbr = is_pmbr_valid(legacymbr);
kfree(legacymbr);
}
if (!good_pmbr)
goto fail;
}
good_pgpt = is_gpt_valid(state, GPT_PRIMARY_PARTITION_TABLE_LBA,
&pgpt, &pptes);
if (good_pgpt)
good_agpt = is_gpt_valid(state,
le64_to_cpu(pgpt->alternate_lba),
&agpt, &aptes);
if (!good_agpt && force_gpt)
good_agpt = is_gpt_valid(state, lastlba, &agpt, &aptes);
/* The obviously unsuccessful case */
if (!good_pgpt && !good_agpt)
goto fail;
compare_gpts(pgpt, agpt, lastlba);
/* The good cases */
if (good_pgpt) {
*gpt = pgpt;
*ptes = pptes;
kfree(agpt);
kfree(aptes);
if (!good_agpt) {
printk(KERN_WARNING
"Alternate GPT is invalid, "
"using primary GPT.\n");
}
return 1;
}
else if (good_agpt) {
*gpt = agpt;
*ptes = aptes;
kfree(pgpt);
kfree(pptes);
printk(KERN_WARNING
"Primary GPT is invalid, using alternate GPT.\n");
return 1;
}
fail:
kfree(pgpt);
kfree(agpt);
kfree(pptes);
kfree(aptes);
*gpt = NULL;
*ptes = NULL;
return 0;
}
/**
* efi_partition(struct parsed_partitions *state)
* @state
*
* Description: called from check.c, if the disk contains GPT
* partitions, sets up partition entries in the kernel.
*
* If the first block on the disk is a legacy MBR,
* it will get handled by msdos_partition().
* If it's a Protective MBR, we'll handle it here.
*
* We do not create a Linux partition for GPT, but
* only for the actual data partitions.
* Returns:
* -1 if unable to read the partition table
* 0 if this isn't our partition table
* 1 if successful
*
*/
int efi_partition(struct parsed_partitions *state)
{
gpt_header *gpt = NULL;
gpt_entry *ptes = NULL;
u32 i;
unsigned ssz = bdev_logical_block_size(state->bdev) / 512;
u8 unparsed_guid[37];
if (!find_valid_gpt(state, &gpt, &ptes) || !gpt || !ptes) {
kfree(gpt);
kfree(ptes);
return 0;
}
pr_debug("GUID Partition Table is valid! Yea!\n");
for (i = 0; i < le32_to_cpu(gpt->num_partition_entries) && i < state->limit-1; i++) {
struct partition_meta_info *info;
unsigned label_count = 0;
unsigned label_max;
u64 start = le64_to_cpu(ptes[i].starting_lba);
u64 size = le64_to_cpu(ptes[i].ending_lba) -
le64_to_cpu(ptes[i].starting_lba) + 1ULL;
if (!is_pte_valid(&ptes[i], last_lba(state->bdev)))
continue;
put_partition(state, i+1, start * ssz, size * ssz);
/* If this is a RAID volume, tell md */
if (!efi_guidcmp(ptes[i].partition_type_guid,
PARTITION_LINUX_RAID_GUID))
state->parts[i + 1].flags = ADDPART_FLAG_RAID;
info = &state->parts[i + 1].info;
/* Instead of doing a manual swap to big endian, reuse the
* common ASCII hex format as the interim.
*/
efi_guid_unparse(&ptes[i].unique_partition_guid, unparsed_guid);
part_pack_uuid(unparsed_guid, info->uuid);
/* Naively convert UTF16-LE to 7 bits. */
label_max = min(sizeof(info->volname) - 1,
sizeof(ptes[i].partition_name));
info->volname[label_max] = 0;
while (label_count < label_max) {
u8 c = ptes[i].partition_name[label_count] & 0xff;
if (c && !isprint(c))
c = '!';
info->volname[label_count] = c;
label_count++;
}
state->parts[i + 1].has_info = true;
}
kfree(ptes);
kfree(gpt);
strlcat(state->pp_buf, "\n", PAGE_SIZE);
return 1;
}
/**
* find_valid_gpt() - Search disk for valid GPT headers and PTEs
* @fd is an open file descriptor to the whole disk
* @gpt is a GPT header ptr, filled on return.
* @ptes is a PTEs ptr, filled on return.
* Description: Returns 1 if valid, 0 on error.
* If valid, returns pointers to newly allocated GPT header and PTEs.
* Validity depends on finding either the Primary GPT header and PTEs valid,
* or the Alternate GPT header and PTEs valid, and the PMBR valid.
*/
static int
find_valid_gpt(int fd, gpt_header ** gpt, gpt_entry ** ptes,
int ignore_pmbr_err)
{
int good_pgpt = 0, good_agpt = 0, good_pmbr = 0;
gpt_header *pgpt = NULL, *agpt = NULL;
gpt_entry *pptes = NULL, *aptes = NULL;
legacy_mbr *legacymbr = NULL;
uint64_t lastlba;
int ret = -1;
errno = EINVAL;
if (!gpt || !ptes)
return -1;
lastlba = last_lba(fd);
good_pgpt = is_gpt_valid(fd, GPT_PRIMARY_PARTITION_TABLE_LBA,
&pgpt, &pptes);
if (good_pgpt) {
good_agpt = is_gpt_valid(fd,
__le64_to_cpu(pgpt->alternate_lba),
&agpt, &aptes);
if (!good_agpt) {
good_agpt = is_gpt_valid(fd, lastlba, &agpt, &aptes);
}
} else {
good_agpt = is_gpt_valid(fd, lastlba, &agpt, &aptes);
}
/* The obviously unsuccessful case */
if (!good_pgpt && !good_agpt) {
goto fail;
}
/* This will be added to the EFI Spec. per Intel after v1.02. */
legacymbr = malloc(sizeof (*legacymbr));
if (legacymbr) {
memset(legacymbr, 0, sizeof (*legacymbr));
read_lba(fd, 0, (uint8_t *) legacymbr, sizeof (*legacymbr));
good_pmbr = is_pmbr_valid(legacymbr);
free(legacymbr);
legacymbr=NULL;
}
/* Failure due to bad PMBR */
if ((good_pgpt || good_agpt) && !good_pmbr && !ignore_pmbr_err) {
if (report_errors)
fprintf(stderr,
"Primary GPT is invalid, using alternate GPT.\n");
goto fail;
}
/* Would fail due to bad PMBR, but force GPT anyhow */
if ((good_pgpt || good_agpt) && !good_pmbr && ignore_pmbr_err &&
report_errors) {
fprintf(stderr,
" Warning: Disk has a valid GPT signature but invalid PMBR.\n"
" Use GNU Parted to correct disk.\n"
" gpt option taken, disk treated as GPT.\n");
}
compare_gpts(pgpt, agpt, lastlba);
/* The good cases */
if (good_pgpt && (good_pmbr || ignore_pmbr_err)) {
*gpt = pgpt;
*ptes = pptes;
} else if (good_agpt && (good_pmbr || ignore_pmbr_err)) {
*gpt = agpt;
*ptes = aptes;
}
ret = 0;
errno = 0;
fail:
if (pgpt && (pgpt != *gpt || ret < 0)) {
free(pgpt);
pgpt=NULL;
}
if (pptes && (pptes != *ptes || ret < 0)) {
free(pptes);
pptes=NULL;
}
if (agpt && (agpt != *gpt || ret < 0)) {
free(agpt);
agpt=NULL;
}
if (aptes && (aptes != *ptes || ret < 0)) {
free(aptes);
aptes=NULL;
}
if (ret < 0) {
*gpt = NULL;
*ptes = NULL;
}
return ret;
}
/**
* find_valid_gpt() - Search disk for valid GPT headers and PTEs
* @state
* @gpt is a GPT header ptr, filled on return.
* @ptes is a PTEs ptr, filled on return.
* Description: Returns 1 if valid, 0 on error.
* If valid, returns pointers to newly allocated GPT header and PTEs.
* Validity depends on PMBR being valid (or being overridden by the
* 'gpt' kernel command line option) and finding either the Primary
* GPT header and PTEs valid, or the Alternate GPT header and PTEs
* valid. If the Primary GPT header is not valid, the Alternate GPT header
* is not checked unless the 'gpt' kernel command line option is passed.
* This protects against devices which misreport their size, and forces
* the user to decide to use the Alternate GPT.
*/
static int find_valid_gpt(struct parsed_partitions *state, gpt_header **gpt,
gpt_entry **ptes)
{
int good_pgpt = 0, good_agpt = 0, good_pmbr = 0;
gpt_header *pgpt = NULL, *agpt = NULL;
gpt_entry *pptes = NULL, *aptes = NULL;
legacy_mbr *legacymbr;
u64 lastlba;
char *blk_name = NULL;
blk_name = ((state->bdev)->bd_disk)->disk_name;
printk(KERN_NOTICE "%s: %s", __func__, blk_name);
if (!ptes)
return 0;
lastlba = last_lba(state->bdev);
if ((!force_gpt) || (!strcmp(blk_name, "mmcblk1"))) {
/* This will be added to the EFI Spec. per Intel after v1.02. */
legacymbr = kzalloc(sizeof (*legacymbr), GFP_KERNEL);
if (legacymbr) {
read_lba(state, 0, (u8 *) legacymbr,
sizeof (*legacymbr));
good_pmbr = is_pmbr_valid(legacymbr);
kfree(legacymbr);
}
if (!good_pmbr)
goto fail;
}
good_pgpt = is_gpt_valid(state, GPT_PRIMARY_PARTITION_TABLE_LBA,
&pgpt, &pptes);
if (good_pgpt)
good_agpt = is_gpt_valid(state,
le64_to_cpu(pgpt->alternate_lba),
&agpt, &aptes);
if (!good_agpt && force_gpt)
good_agpt = is_gpt_valid(state, lastlba, &agpt, &aptes);
/* The obviously unsuccessful case */
if (!good_pgpt && !good_agpt)
goto fail;
compare_gpts(pgpt, agpt, lastlba);
/* The good cases */
if (good_pgpt) {
*gpt = pgpt;
*ptes = pptes;
kfree(agpt);
kfree(aptes);
if (!good_agpt) {
printk(KERN_WARNING
"Alternate GPT is invalid, "
"using primary GPT.\n");
}
return 1;
}
else if (good_agpt) {
*gpt = agpt;
*ptes = aptes;
kfree(pgpt);
kfree(pptes);
printk(KERN_WARNING
"Primary GPT is invalid, using alternate GPT.\n");
return 1;
}
fail:
kfree(pgpt);
kfree(agpt);
kfree(pptes);
kfree(aptes);
*gpt = NULL;
*ptes = NULL;
return 0;
}
