Use gpt_header.sizeof_partition_entry instead of sizeof(gpt_entry)
for GPT entry size.
According to UEFI spec, GPT entry size is specified in GPT header.
Signed-off-by: Eugene Korenevsky <ekorenev...@gmail.com>
---
block/partitions/efi.c | 26 ++++++++++++--------------
1 file changed, 12 insertions(+), 14 deletions(-)
diff --git a/block/partitions/efi.c b/block/partitions/efi.c
index 39f70d968754..29f7ec585e1d 100644
--- a/block/partitions/efi.c
+++ b/block/partitions/efi.c
@@ -428,11 +428,6 @@ static int is_gpt_valid(struct parsed_partitions *state,
u64 lba,
(unsigned long
long)le64_to_cpu((*gpt)->first_usable_lba));
goto fail;
}
- /* Check that sizeof_partition_entry has the correct value */
- if (le32_to_cpu((*gpt)->sizeof_partition_entry) != sizeof(gpt_entry)) {
- pr_debug("GUID Partition Entry Size check failed.\n");
- goto fail;
- }
/* Sanity check partition table size */
pt_size = (u64)le32_to_cpu((*gpt)->num_partition_entries) *
@@ -692,7 +687,7 @@ static int find_valid_gpt(struct parsed_partitions *state,
gpt_header **gpt,
int efi_partition(struct parsed_partitions *state)
{
gpt_header *gpt = NULL;
- gpt_entry *ptes = NULL;
+ gpt_entry *ptes = NULL, *pte;
u32 i;
unsigned ssz = bdev_logical_block_size(state->bdev) / 512;
@@ -704,13 +699,16 @@ int efi_partition(struct parsed_partitions *state)
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++) {
+ pte = ptes;
+ for (i = 0; i < le32_to_cpu(gpt->num_partition_entries) && i <
state->limit-1;
+ i++,
+ pte = (gpt_entry *)((u8*)pte +
gpt->sizeof_partition_entry)) {
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;
+ u64 start = le64_to_cpu(pte->starting_lba);
+ u64 size = le64_to_cpu(pte->ending_lba) -
+ le64_to_cpu(pte->starting_lba) + 1ULL;
if (!is_pte_valid(&ptes[i], last_lba(state->bdev)))
continue;
@@ -718,18 +716,18 @@ int efi_partition(struct parsed_partitions *state)
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))
+ if (!efi_guidcmp(pte->partition_type_guid,
PARTITION_LINUX_RAID_GUID))
state->parts[i + 1].flags = ADDPART_FLAG_RAID;
info = &state->parts[i + 1].info;
- efi_guid_to_str(&ptes[i].unique_partition_guid, info->uuid);
+ efi_guid_to_str(&pte->unique_partition_guid, info->uuid);
/* Naively convert UTF16-LE to 7 bits. */
label_max = min(ARRAY_SIZE(info->volname) - 1,
- ARRAY_SIZE(ptes[i].partition_name));
+ ARRAY_SIZE(pte->partition_name));
info->volname[label_max] = 0;
while (label_count < label_max) {
- u8 c = ptes[i].partition_name[label_count] & 0xff;
+ u8 c = pte->partition_name[label_count] & 0xff;
if (c && !isprint(c))
c = '!';
info->volname[label_count] = c;
--
2.18.0
