/************************************************************
* EFI GUID Partition Table handling
- * Per Intel EFI Specification v1.02
- * http://developer.intel.com/technology/efi/efi.htm
+ *
+ * http://www.uefi.org/specs/
+ * http://www.intel.com/technology/efi/
+ *
* efi.[ch] by Matt Domsch <Matt_Domsch@dell.com>
* Copyright 2000,2001,2002,2004 Dell Inc.
*
* - Code works, detects all the partitions.
*
************************************************************/
-#include <linux/config.h>
#include <linux/crc32.h>
+#include <linux/math64.h>
#include "check.h"
#include "efi.h"
-#undef EFI_DEBUG
-#ifdef EFI_DEBUG
-#define Dprintk(x...) printk(KERN_DEBUG x)
-#else
-#define Dprintk(x...)
-#endif
-
/* This allows a kernel command line option 'gpt' to override
* the test for invalid PMBR. Not __initdata because reloading
* the partition tables happens after init too.
{
if (!bdev || !bdev->bd_inode)
return 0;
- return (bdev->bd_inode->i_size >> 9) - 1ULL;
+ return div_u64(bdev->bd_inode->i_size,
+ bdev_logical_block_size(bdev)) - 1ULL;
}
static inline int
-pmbr_part_valid(struct partition *part, u64 lastlba)
+pmbr_part_valid(struct partition *part)
{
if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
le32_to_cpu(part->start_sect) == 1UL)
/**
* is_pmbr_valid(): test Protective MBR for validity
* @mbr: pointer to a legacy mbr structure
- * @lastlba: last_lba for the whole device
*
* Description: Returns 1 if PMBR is valid, 0 otherwise.
* Validity depends on two things:
* 2) One partition of type 0xEE is found
*/
static int
-is_pmbr_valid(legacy_mbr *mbr, u64 lastlba)
+is_pmbr_valid(legacy_mbr *mbr)
{
int i;
if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
return 0;
for (i = 0; i < 4; i++)
- if (pmbr_part_valid(&mbr->partition_record[i], lastlba))
+ if (pmbr_part_valid(&mbr->partition_record[i]))
return 1;
return 0;
}
read_lba(struct block_device *bdev, u64 lba, u8 * buffer, size_t count)
{
size_t totalreadcount = 0;
+ sector_t n = lba * (bdev_logical_block_size(bdev) / 512);
if (!bdev || !buffer || lba > last_lba(bdev))
return 0;
while (count) {
int copied = 512;
Sector sect;
- unsigned char *data = read_dev_sector(bdev, lba++, §);
+ unsigned char *data = read_dev_sector(bdev, n++, §);
if (!data)
break;
if (copied > count)
le32_to_cpu(gpt->sizeof_partition_entry);
if (!count)
return NULL;
- pte = kmalloc(count, GFP_KERNEL);
+ pte = kzalloc(count, GFP_KERNEL);
if (!pte)
return NULL;
- memset(pte, 0, count);
if (read_lba(bdev, le64_to_cpu(gpt->partition_entry_lba),
(u8 *) pte,
alloc_read_gpt_header(struct block_device *bdev, u64 lba)
{
gpt_header *gpt;
+ unsigned ssz = bdev_logical_block_size(bdev);
+
if (!bdev)
return NULL;
- gpt = kmalloc(sizeof (gpt_header), GFP_KERNEL);
+ gpt = kzalloc(ssz, GFP_KERNEL);
if (!gpt)
return NULL;
- memset(gpt, 0, sizeof (gpt_header));
- if (read_lba(bdev, lba, (u8 *) gpt,
- sizeof (gpt_header)) < sizeof (gpt_header)) {
+ if (read_lba(bdev, lba, (u8 *) gpt, ssz) < ssz) {
kfree(gpt);
gpt=NULL;
return NULL;
/* Check the GUID Partition Table signature */
if (le64_to_cpu((*gpt)->signature) != GPT_HEADER_SIGNATURE) {
- Dprintk("GUID Partition Table Header signature is wrong:"
- "%lld != %lld\n",
- (unsigned long long)le64_to_cpu((*gpt)->signature),
- (unsigned long long)GPT_HEADER_SIGNATURE);
+ pr_debug("GUID Partition Table Header signature is wrong:"
+ "%lld != %lld\n",
+ (unsigned long long)le64_to_cpu((*gpt)->signature),
+ (unsigned long long)GPT_HEADER_SIGNATURE);
goto fail;
}
crc = efi_crc32((const unsigned char *) (*gpt), le32_to_cpu((*gpt)->header_size));
if (crc != origcrc) {
- Dprintk
- ("GUID Partition Table Header CRC is wrong: %x != %x\n",
- crc, origcrc);
+ pr_debug("GUID Partition Table Header CRC is wrong: %x != %x\n",
+ crc, origcrc);
goto fail;
}
(*gpt)->header_crc32 = cpu_to_le32(origcrc);
/* Check that the my_lba entry points to the LBA that contains
* the GUID Partition Table */
if (le64_to_cpu((*gpt)->my_lba) != lba) {
- Dprintk("GPT my_lba incorrect: %lld != %lld\n",
- (unsigned long long)le64_to_cpu((*gpt)->my_lba),
- (unsigned long long)lba);
+ pr_debug("GPT my_lba incorrect: %lld != %lld\n",
+ (unsigned long long)le64_to_cpu((*gpt)->my_lba),
+ (unsigned long long)lba);
goto fail;
}
*/
lastlba = last_lba(bdev);
if (le64_to_cpu((*gpt)->first_usable_lba) > lastlba) {
- Dprintk("GPT: first_usable_lba incorrect: %lld > %lld\n",
- (unsigned long long)le64_to_cpu((*gpt)->first_usable_lba),
- (unsigned long long)lastlba);
+ pr_debug("GPT: first_usable_lba incorrect: %lld > %lld\n",
+ (unsigned long long)le64_to_cpu((*gpt)->first_usable_lba),
+ (unsigned long long)lastlba);
goto fail;
}
if (le64_to_cpu((*gpt)->last_usable_lba) > lastlba) {
- Dprintk("GPT: last_usable_lba incorrect: %lld > %lld\n",
- (unsigned long long)le64_to_cpu((*gpt)->last_usable_lba),
- (unsigned long long)lastlba);
+ pr_debug("GPT: last_usable_lba incorrect: %lld > %lld\n",
+ (unsigned long long)le64_to_cpu((*gpt)->last_usable_lba),
+ (unsigned long long)lastlba);
goto fail;
}
le32_to_cpu((*gpt)->sizeof_partition_entry));
if (crc != le32_to_cpu((*gpt)->partition_entry_array_crc32)) {
- Dprintk("GUID Partitition Entry Array CRC check failed.\n");
+ pr_debug("GUID Partitition Entry Array CRC check failed.\n");
goto fail_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 = 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 = kmalloc(sizeof (*legacymbr), GFP_KERNEL);
+ legacymbr = kzalloc(sizeof (*legacymbr), GFP_KERNEL);
if (legacymbr) {
- memset(legacymbr, 0, sizeof (*legacymbr));
read_lba(bdev, 0, (u8 *) legacymbr,
sizeof (*legacymbr));
- good_pmbr = is_pmbr_valid(legacymbr, lastlba);
+ good_pmbr = is_pmbr_valid(legacymbr);
kfree(legacymbr);
- legacymbr=NULL;
}
if (!good_pmbr)
goto fail;
gpt_header *gpt = NULL;
gpt_entry *ptes = NULL;
u32 i;
+ unsigned ssz = bdev_logical_block_size(bdev) / 512;
if (!find_valid_gpt(bdev, &gpt, &ptes) || !gpt || !ptes) {
kfree(gpt);
return 0;
}
- Dprintk("GUID Partition Table is valid! Yea!\n");
+ 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++) {
+ 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(bdev)))
continue;
- put_partition(state, i+1, le64_to_cpu(ptes[i].starting_lba),
- (le64_to_cpu(ptes[i].ending_lba) -
- le64_to_cpu(ptes[i].starting_lba) +
- 1ULL));
+ 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,
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff