diff options
| -rw-r--r-- | block/dmg.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/block/dmg.c b/block/dmg.c index 130efac018..57922c579a 100644 --- a/block/dmg.c +++ b/block/dmg.c @@ -189,7 +189,6 @@ typedef struct DmgHeaderState { /* used internally by dmg_read_mish_block to remember offsets of blocks * across calls */ uint64_t data_fork_offset; - uint64_t last_out_offset; /* exported for dmg_open */ uint32_t max_compressed_size; uint32_t max_sectors_per_chunk; @@ -205,6 +204,7 @@ static int dmg_read_mish_block(BDRVDMGState *s, DmgHeaderState *ds, int64_t offset = 0; uint64_t data_offset; uint64_t in_offset = ds->data_fork_offset; + uint64_t out_offset; type = buff_read_uint32(buffer, offset); /* skip data that is not a valid MISH block (invalid magic or too small) */ @@ -213,6 +213,9 @@ static int dmg_read_mish_block(BDRVDMGState *s, DmgHeaderState *ds, return 0; } + /* chunk offsets are relative to this sector number */ + out_offset = buff_read_uint64(buffer, offset + 8); + /* location in data fork for (compressed) blob (in bytes) */ data_offset = buff_read_uint64(buffer, offset + 0x18); in_offset += data_offset; @@ -233,10 +236,6 @@ static int dmg_read_mish_block(BDRVDMGState *s, DmgHeaderState *ds, offset += 4; if (s->types[i] != 0x80000005 && s->types[i] != 1 && s->types[i] != 2) { - if (s->types[i] == 0xffffffff && i > 0) { - ds->last_out_offset = s->sectors[i - 1] + - s->sectorcounts[i - 1]; - } chunk_count--; i--; offset += 36; @@ -245,7 +244,7 @@ static int dmg_read_mish_block(BDRVDMGState *s, DmgHeaderState *ds, offset += 4; s->sectors[i] = buff_read_uint64(buffer, offset); - s->sectors[i] += ds->last_out_offset; + s->sectors[i] += out_offset; offset += 8; s->sectorcounts[i] = buff_read_uint64(buffer, offset); @@ -419,7 +418,6 @@ static int dmg_open(BlockDriverState *bs, QDict *options, int flags, s->offsets = s->lengths = s->sectors = s->sectorcounts = NULL; /* used by dmg_read_mish_block to keep track of the current I/O position */ ds.data_fork_offset = 0; - ds.last_out_offset = 0; ds.max_compressed_size = 1; ds.max_sectors_per_chunk = 1; |