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* grub-core/fs/btrfs.c (grub_btrfs_read_logical): Support huge

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chunks.
	* include/grub/err.h (grub_err_t): New enum value GRUB_ERR_BUG.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2011-04-18 23:10:19 +02:00
parent 93a777e388
commit 34faa5955a
3 changed files with 28 additions and 10 deletions
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6
ChangeLog
View file

@ -1,3 +1,9 @@
2011-04-18 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/fs/btrfs.c (grub_btrfs_read_logical): Support huge
chunks.
* include/grub/err.h (grub_err_t): New enum value GRUB_ERR_BUG.
2011-04-18 Vladimir Serbinenko <phcoder@gmail.com>
Complete 64-bit division support.

29
grub-core/fs/btrfs.c
View file

@ -588,7 +588,7 @@ grub_btrfs_read_logical (struct grub_btrfs_data *data,
grub_uint8_t *ptr;
struct grub_btrfs_key *key;
struct grub_btrfs_chunk_item *chunk;
grub_ssize_t csize;
grub_uint64_t csize;
grub_err_t err;
struct grub_btrfs_key key_out;
int challoc = 0;
@ -648,11 +648,18 @@ grub_btrfs_read_logical (struct grub_btrfs_data *data,
chunk_found:
{
grub_uint32_t stripen;
grub_uint32_t stripe_offset;
grub_uint64_t stripe_offset;
grub_uint64_t off = addr - grub_le_to_cpu64 (key->offset);
unsigned redundancy = 1;
unsigned i, j;
if (grub_le_to_cpu64 (chunk->size) <= off)
{
grub_dprintf ("btrfs", "no chunk\n");
return grub_error (GRUB_ERR_BAD_FS,
"couldn't find the chunk descriptor");
}
grub_dprintf ("btrfs", "chunk 0x%" PRIxGRUB_UINT64_T
"+0x%" PRIxGRUB_UINT64_T
" (%d stripes (%d substripes) of %"
@ -668,17 +675,19 @@ grub_btrfs_read_logical (struct grub_btrfs_data *data,
{
case GRUB_BTRFS_CHUNK_TYPE_SINGLE:
{
grub_uint32_t stripe_length;
stripe_length = grub_divmod64 (grub_le_to_cpu64 (chunk->size),
grub_le_to_cpu16 (chunk->nstripes),
NULL);
stripen = grub_divmod64 (off, stripe_length, &stripe_offset);
grub_uint64_t stripe_length;
grub_dprintf ("btrfs", "single\n");
stripe_length = grub_divmod64_full (grub_le_to_cpu64 (chunk->size),
grub_le_to_cpu16 (chunk->nstripes),
NULL);
stripen = grub_divmod64_full (off, stripe_length, &stripe_offset);
csize = (stripen + 1) * stripe_length - off;
break;
}
case GRUB_BTRFS_CHUNK_TYPE_DUPLICATED:
case GRUB_BTRFS_CHUNK_TYPE_RAID1:
{
grub_dprintf ("btrfs", "RAID1\n");
stripen = 0;
stripe_offset = off;
csize = grub_le_to_cpu64 (chunk->size) - off;
@ -689,6 +698,7 @@ grub_btrfs_read_logical (struct grub_btrfs_data *data,
{
grub_uint64_t middle, high;
grub_uint32_t low;
grub_dprintf ("btrfs", "RAID0\n");
middle = grub_divmod64 (off,
grub_le_to_cpu64 (chunk->stripe_length),
&low);
@ -721,12 +731,13 @@ grub_btrfs_read_logical (struct grub_btrfs_data *data,
break;
}
default:
grub_dprintf ("btrfs", "unsupported RAID\n");
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
"unsupported RAID flags %" PRIxGRUB_UINT64_T,
grub_le_to_cpu64 (chunk->type));
}
if (csize <= 0)
return grub_error (GRUB_ERR_BAD_FS,
if (csize == 0)
return grub_error (GRUB_ERR_BUG,
"couldn't find the chunk descriptor");
if ((grub_size_t) csize > size)
csize = size;

3
include/grub/err.h
View file

@ -55,7 +55,8 @@ typedef enum
GRUB_ERR_TIMEOUT,
GRUB_ERR_IO,
GRUB_ERR_ACCESS_DENIED,
GRUB_ERR_EXTRACTOR
GRUB_ERR_EXTRACTOR,
GRUB_ERR_BUG
}
grub_err_t;