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Add RAID10 support

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-12-03 18:11:10 +01:00
parent db51e201fc
commit 6333f1e9b6
1 changed files with 20 additions and 2 deletions
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22
grub-core/fs/btrfs.c
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@ -111,6 +111,7 @@ struct grub_btrfs_chunk_item
#define GRUB_BTRFS_CHUNK_TYPE_RAID0 0x08
#define GRUB_BTRFS_CHUNK_TYPE_RAID1 0x10
#define GRUB_BTRFS_CHUNK_TYPE_DUPLICATED 0x20
#define GRUB_BTRFS_CHUNK_TYPE_RAID10 0x40
grub_uint8_t dummy2[0xc];
grub_uint16_t nstripes;
grub_uint16_t nsubstripes;
@ -668,9 +669,26 @@ grub_btrfs_read_logical (struct grub_btrfs_data *data,
csize = grub_le_to_cpu64 (chunk->stripe_length) - low;
break;
}
case GRUB_BTRFS_CHUNK_TYPE_RAID10:
/* FIXME: Use redundancy. */
{
grub_uint64_t middle, high;
grub_uint32_t low;
middle = grub_divmod64 (off,
grub_le_to_cpu64 (chunk->stripe_length),
&low);
high = grub_divmod64 (middle,
grub_le_to_cpu16 (chunk->nsubstripes),
&stripen);
stripen *= grub_le_to_cpu16 (chunk->nstripes)
/ grub_le_to_cpu16 (chunk->nsubstripes);
stripe_offset = low + grub_le_to_cpu64 (chunk->stripe_length)
* high;
csize = grub_le_to_cpu64 (chunk->stripe_length) - low;
break;
}
default:
grub_printf ("unsupported RAID flags %" PRIxGRUB_UINT64_T "\n",
grub_le_to_cpu64 (chunk->type));
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
"unsupported RAID flags %" PRIxGRUB_UINT64_T,
grub_le_to_cpu64 (chunk->type));