gpt: add verbose debug logging
This commit is contained in:
Michael Marineau
parent
d38d2d0fb1
commit
c2f5fde6ab
1 changed files with 109 additions and 8 deletions
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@ -207,6 +207,18 @@ grub_gpt_pmbr_check (struct grub_msdos_partition_mbr *mbr)
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return grub_error (GRUB_ERR_BAD_PART_TABLE, "invalid protective MBR");
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}
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static grub_uint64_t
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grub_gpt_entries_sectors (struct grub_gpt_header *gpt,
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unsigned int log_sector_size)
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{
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grub_uint64_t sector_bytes, entries_bytes;
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sector_bytes = 1ULL << log_sector_size;
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entries_bytes = (grub_uint64_t) grub_le_to_cpu32 (gpt->maxpart) *
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(grub_uint64_t) grub_le_to_cpu32 (gpt->partentry_size);
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return grub_divmod64(entries_bytes + sector_bytes - 1, sector_bytes, NULL);
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}
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grub_err_t
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grub_gpt_header_check (struct grub_gpt_header *gpt,
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unsigned int log_sector_size)
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@ -236,6 +248,64 @@ grub_gpt_header_check (struct grub_gpt_header *gpt,
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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grub_gpt_check_primary (grub_gpt_t gpt)
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{
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grub_uint64_t backup, primary, entries, entries_len, start, end;
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primary = grub_le_to_cpu64 (gpt->primary.header_lba);
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backup = grub_le_to_cpu64 (gpt->primary.alternate_lba);
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entries = grub_le_to_cpu64 (gpt->primary.partitions);
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entries_len = grub_gpt_entries_sectors(&gpt->primary, gpt->log_sector_size);
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start = grub_le_to_cpu64 (gpt->primary.start);
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end = grub_le_to_cpu64 (gpt->primary.end);
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grub_dprintf ("gpt", "Primary GPT layout:\n"
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"primary header = 0x%llx backup header = 0x%llx\n"
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"entries location = 0x%llx length = 0x%llx\n"
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"first usable = 0x%llx last usable = 0x%llx\n",
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(unsigned long long) primary,
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(unsigned long long) backup,
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(unsigned long long) entries,
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(unsigned long long) entries_len,
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(unsigned long long) start,
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(unsigned long long) end);
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if (grub_gpt_header_check (&gpt->primary, gpt->log_sector_size))
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return grub_errno;
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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grub_gpt_check_backup (grub_gpt_t gpt)
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{
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grub_uint64_t backup, primary, entries, entries_len, start, end;
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backup = grub_le_to_cpu64 (gpt->backup.header_lba);
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primary = grub_le_to_cpu64 (gpt->backup.alternate_lba);
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entries = grub_le_to_cpu64 (gpt->backup.partitions);
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entries_len = grub_gpt_entries_sectors(&gpt->backup, gpt->log_sector_size);
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start = grub_le_to_cpu64 (gpt->backup.start);
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end = grub_le_to_cpu64 (gpt->backup.end);
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grub_dprintf ("gpt", "Backup GPT layout:\n"
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"primary header = 0x%llx backup header = 0x%llx\n"
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"entries location = 0x%llx length = 0x%llx\n"
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"first usable = 0x%llx last usable = 0x%llx\n",
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(unsigned long long) primary,
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(unsigned long long) backup,
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(unsigned long long) entries,
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(unsigned long long) entries_len,
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(unsigned long long) start,
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(unsigned long long) end);
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if (grub_gpt_header_check (&gpt->backup, gpt->log_sector_size))
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return grub_errno;
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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grub_gpt_read_primary (grub_disk_t disk, grub_gpt_t gpt)
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{
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@ -246,11 +316,13 @@ grub_gpt_read_primary (grub_disk_t disk, grub_gpt_t gpt)
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* but eventually this code should match the existing behavior. */
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gpt->log_sector_size = disk->log_sector_size;
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grub_dprintf ("gpt", "reading primary GPT from sector 0x1\n");
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addr = grub_gpt_sector_to_addr (gpt, 1);
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if (grub_disk_read (disk, addr, 0, sizeof (gpt->primary), &gpt->primary))
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return grub_errno;
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if (grub_gpt_header_check (&gpt->primary, gpt->log_sector_size))
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if (grub_gpt_check_primary (gpt))
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return grub_errno;
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gpt->status |= GRUB_GPT_PRIMARY_HEADER_VALID;
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@ -272,11 +344,14 @@ grub_gpt_read_backup (grub_disk_t disk, grub_gpt_t gpt)
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return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
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"Unable to locate backup GPT");
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grub_dprintf ("gpt", "reading backup GPT from sector 0x%llx\n",
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(unsigned long long) sector);
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addr = grub_gpt_sector_to_addr (gpt, sector);
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if (grub_disk_read (disk, addr, 0, sizeof (gpt->backup), &gpt->backup))
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return grub_errno;
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if (grub_gpt_header_check (&gpt->backup, gpt->log_sector_size))
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if (grub_gpt_check_backup (gpt))
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return grub_errno;
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gpt->status |= GRUB_GPT_BACKUP_HEADER_VALID;
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@ -289,6 +364,7 @@ grub_gpt_read_entries (grub_disk_t disk, grub_gpt_t gpt,
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{
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struct grub_gpt_partentry *entries = NULL;
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grub_uint32_t count, size, crc;
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grub_uint64_t sector;
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grub_disk_addr_t addr;
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grub_size_t entries_size;
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@ -310,7 +386,12 @@ grub_gpt_read_entries (grub_disk_t disk, grub_gpt_t gpt,
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if (!entries)
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goto fail;
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addr = grub_gpt_sector_to_addr (gpt, grub_le_to_cpu64 (header->partitions));
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sector = grub_le_to_cpu64 (header->partitions);
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grub_dprintf ("gpt", "reading GPT %lu entries from sector 0x%llx\n",
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(unsigned long) count,
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(unsigned long long) sector);
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addr = grub_gpt_sector_to_addr (gpt, sector);
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if (grub_disk_read (disk, addr, 0, entries_size, entries))
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goto fail;
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@ -336,6 +417,8 @@ grub_gpt_read (grub_disk_t disk)
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{
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grub_gpt_t gpt;
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grub_dprintf ("gpt", "reading GPT from %s\n", disk->name);
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gpt = grub_zalloc (sizeof (*gpt));
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if (!gpt)
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goto fail;
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@ -369,12 +452,18 @@ grub_gpt_read (grub_disk_t disk)
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/* Similarly, favor the value or error from the primary table. */
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if (gpt->status & GRUB_GPT_BACKUP_HEADER_VALID &&
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!grub_gpt_read_entries (disk, gpt, &gpt->backup))
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{
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grub_dprintf ("gpt", "read valid backup GPT from %s\n", disk->name);
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gpt->status |= GRUB_GPT_BACKUP_ENTRIES_VALID;
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}
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grub_errno = GRUB_ERR_NONE;
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if (gpt->status & GRUB_GPT_PRIMARY_HEADER_VALID &&
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!grub_gpt_read_entries (disk, gpt, &gpt->primary))
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{
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grub_dprintf ("gpt", "read valid primary GPT from %s\n", disk->name);
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gpt->status |= GRUB_GPT_PRIMARY_ENTRIES_VALID;
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}
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if (gpt->status & GRUB_GPT_PRIMARY_ENTRIES_VALID ||
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gpt->status & GRUB_GPT_BACKUP_ENTRIES_VALID)
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@ -394,6 +483,8 @@ grub_gpt_repair (grub_disk_t disk, grub_gpt_t gpt)
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{
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grub_uint64_t backup_header, backup_entries;
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grub_dprintf ("gpt", "repairing GPT for %s\n", disk->name);
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if (disk->log_sector_size != gpt->log_sector_size)
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return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
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"GPT sector size must match disk sector size");
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@ -404,11 +495,13 @@ grub_gpt_repair (grub_disk_t disk, grub_gpt_t gpt)
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if (gpt->status & GRUB_GPT_PRIMARY_HEADER_VALID)
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{
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grub_dprintf ("gpt", "primary GPT header is valid\n");
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backup_header = grub_le_to_cpu64 (gpt->primary.alternate_lba);
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grub_memcpy (&gpt->backup, &gpt->primary, sizeof (gpt->backup));
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}
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else if (gpt->status & GRUB_GPT_BACKUP_HEADER_VALID)
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{
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grub_dprintf ("gpt", "backup GPT header is valid\n");
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backup_header = grub_le_to_cpu64 (gpt->backup.header_lba);
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grub_memcpy (&gpt->primary, &gpt->backup, sizeof (gpt->primary));
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}
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@ -418,9 +511,13 @@ grub_gpt_repair (grub_disk_t disk, grub_gpt_t gpt)
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/* Relocate backup to end if disk whenever possible. */
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if (grub_gpt_disk_size_valid(disk))
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backup_header = disk->total_sectors - 1;
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grub_dprintf ("gpt", "backup GPT header will be located at 0x%llx\n",
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(unsigned long long) backup_header);
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backup_entries = backup_header -
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grub_gpt_size_to_sectors (gpt, gpt->entries_size);
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grub_dprintf ("gpt", "backup GPT entries will be located at 0x%llx\n",
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(unsigned long long) backup_entries);
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/* Update/fixup header and partition table locations. */
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gpt->primary.header_lba = grub_cpu_to_le64_compile_time (1);
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@ -435,13 +532,15 @@ grub_gpt_repair (grub_disk_t disk, grub_gpt_t gpt)
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return grub_errno;
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/* Sanity check. */
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if (grub_gpt_header_check (&gpt->primary, gpt->log_sector_size))
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if (grub_gpt_check_primary (gpt))
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return grub_error (GRUB_ERR_BUG, "Generated invalid GPT primary header");
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if (grub_gpt_header_check (&gpt->backup, gpt->log_sector_size))
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if (grub_gpt_check_backup (gpt))
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return grub_error (GRUB_ERR_BUG, "Generated invalid GPT backup header");
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gpt->status |= GRUB_GPT_BOTH_VALID;
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grub_dprintf ("gpt", "repairing GPT for %s successful\n", disk->name);
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return GRUB_ERR_NONE;
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}
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@ -497,9 +596,11 @@ grub_gpt_write (grub_disk_t disk, grub_gpt_t gpt)
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if (!(gpt->status & GRUB_GPT_BOTH_VALID))
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return grub_error (GRUB_ERR_BAD_PART_TABLE, "Invalid GPT data");
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grub_dprintf ("gpt", "writing primary GPT to %s\n", disk->name);
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if (grub_gpt_write_table (disk, gpt, &gpt->primary))
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return grub_errno;
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grub_dprintf ("gpt", "writing backup GPT to %s\n", disk->name);
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if (grub_gpt_write_table (disk, gpt, &gpt->backup))
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return grub_errno;
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