diff options
Diffstat (limited to 'tests/image-fuzzer/qcow2/layout.py')
| -rw-r--r-- | tests/image-fuzzer/qcow2/layout.py | 57 |
1 files changed, 28 insertions, 29 deletions
diff --git a/tests/image-fuzzer/qcow2/layout.py b/tests/image-fuzzer/qcow2/layout.py index 675877da96..57ebe86e9a 100644 --- a/tests/image-fuzzer/qcow2/layout.py +++ b/tests/image-fuzzer/qcow2/layout.py @@ -16,7 +16,6 @@ # along with this program. If not, see <http://www.gnu.org/licenses/>. # -from __future__ import absolute_import import random import struct from . import fuzz @@ -53,8 +52,8 @@ class Field(object): return iter([self.fmt, self.offset, self.value, self.name]) def __repr__(self): - return "Field(fmt='%s', offset=%d, value=%s, name=%s)" % \ - (self.fmt, self.offset, str(self.value), self.name) + return "Field(fmt=%r, offset=%r, value=%r, name=%r)" % \ + (self.fmt, self.offset, self.value, self.name) class FieldsList(object): @@ -122,7 +121,7 @@ class Image(object): def create_header(self, cluster_bits, backing_file_name=None): """Generate a random valid header.""" meta_header = [ - ['>4s', 0, "QFI\xfb", 'magic'], + ['>4s', 0, b"QFI\xfb", 'magic'], ['>I', 4, random.randint(2, 3), 'version'], ['>Q', 8, 0, 'backing_file_offset'], ['>I', 16, 0, 'backing_file_size'], @@ -231,7 +230,7 @@ class Image(object): feature_tables = [] feature_ids = [] inner_offset = self.ext_offset + ext_header_len - feat_name = 'some cool feature' + feat_name = b'some cool feature' while len(feature_tables) < num_fnt_entries * 3: feat_type, feat_bit = gen_feat_ids() # Remove duplicates @@ -253,7 +252,7 @@ class Image(object): ['>I', self.ext_offset, 0x6803f857, 'ext_magic'], # One feature table contains 3 fields and takes 48 bytes ['>I', self.ext_offset + UINT32_S, - len(feature_tables) / 3 * 48, 'ext_length'] + len(feature_tables) // 3 * 48, 'ext_length'] ] + feature_tables) self.ext_offset = inner_offset @@ -271,7 +270,7 @@ class Image(object): def create_l2_entry(host, guest, l2_cluster): """Generate one L2 entry.""" offset = l2_cluster * self.cluster_size - l2_size = self.cluster_size / UINT64_S + l2_size = self.cluster_size // UINT64_S entry_offset = offset + UINT64_S * (guest % l2_size) cluster_descriptor = host * self.cluster_size if not self.header['version'][0].value == 2: @@ -283,8 +282,8 @@ class Image(object): def create_l1_entry(l2_cluster, l1_offset, guest): """Generate one L1 entry.""" - l2_size = self.cluster_size / UINT64_S - entry_offset = l1_offset + UINT64_S * (guest / l2_size) + l2_size = self.cluster_size // UINT64_S + entry_offset = l1_offset + UINT64_S * (guest // l2_size) # While snapshots are not supported bit #63 = 1 entry_val = (1 << 63) + l2_cluster * self.cluster_size return ['>Q', entry_offset, entry_val, 'l1_entry'] @@ -298,11 +297,11 @@ class Image(object): l2 = [] else: meta_data = self._get_metadata() - guest_clusters = random.sample(range(self.image_size / + guest_clusters = random.sample(range(self.image_size // self.cluster_size), len(self.data_clusters)) # Number of entries in a L1/L2 table - l_size = self.cluster_size / UINT64_S + l_size = self.cluster_size // UINT64_S # Number of clusters necessary for L1 table l1_size = int(ceil((max(guest_clusters) + 1) / float(l_size**2))) l1_start = self._get_adjacent_clusters(self.data_clusters | @@ -318,7 +317,7 @@ class Image(object): # L2 entries l2 = [] for host, guest in zip(self.data_clusters, guest_clusters): - l2_id = guest / l_size + l2_id = guest // l_size if l2_id not in l2_ids: l2_ids.append(l2_id) l2_clusters.append(self._get_adjacent_clusters( @@ -339,14 +338,14 @@ class Image(object): def allocate_rfc_blocks(data, size): """Return indices of clusters allocated for refcount blocks.""" cluster_ids = set() - diff = block_ids = set([x / size for x in data]) + diff = block_ids = set([x // size for x in data]) while len(diff) != 0: # Allocate all yet not allocated clusters new = self._get_available_clusters(data | cluster_ids, len(diff)) # Indices of new refcount blocks necessary to cover clusters # in 'new' - diff = set([x / size for x in new]) - block_ids + diff = set([x // size for x in new]) - block_ids cluster_ids |= new block_ids |= diff return cluster_ids, block_ids @@ -359,7 +358,7 @@ class Image(object): blocks = set(init_blocks) clusters = set() # Number of entries in one cluster of the refcount table - size = self.cluster_size / UINT64_S + size = self.cluster_size // UINT64_S # Number of clusters necessary for the refcount table based on # the current number of refcount blocks table_size = int(ceil((max(blocks) + 1) / float(size))) @@ -373,7 +372,7 @@ class Image(object): table_size + 1)) # New refcount blocks necessary for clusters occupied by the # refcount table - diff = set([c / block_size for c in table_clusters]) - blocks + diff = set([c // block_size for c in table_clusters]) - blocks blocks |= diff while len(diff) != 0: # Allocate clusters for new refcount blocks @@ -382,12 +381,12 @@ class Image(object): len(diff)) # Indices of new refcount blocks necessary to cover # clusters in 'new' - diff = set([x / block_size for x in new]) - blocks + diff = set([x // block_size for x in new]) - blocks clusters |= new blocks |= diff # Check if the refcount table needs one more cluster if int(ceil((max(blocks) + 1) / float(size))) > table_size: - new_block_id = (table_start + table_size) / block_size + new_block_id = (table_start + table_size) // block_size # Check if the additional table cluster needs # one more refcount block if new_block_id not in blocks: @@ -399,13 +398,13 @@ class Image(object): def create_table_entry(table_offset, block_cluster, block_size, cluster): """Generate a refcount table entry.""" - offset = table_offset + UINT64_S * (cluster / block_size) + offset = table_offset + UINT64_S * (cluster // block_size) return ['>Q', offset, block_cluster * self.cluster_size, 'refcount_table_entry'] def create_block_entry(block_cluster, block_size, cluster): """Generate a list of entries for the current block.""" - entry_size = self.cluster_size / block_size + entry_size = self.cluster_size // block_size offset = block_cluster * self.cluster_size entry_offset = offset + entry_size * (cluster % block_size) # While snapshots are not supported all refcounts are set to 1 @@ -415,7 +414,7 @@ class Image(object): # Number of refcount entries per refcount block # Convert self.cluster_size from bytes to bits to have the same # base for the numerator and denominator - block_size = self.cluster_size * 8 / refcount_bits + block_size = self.cluster_size * 8 // refcount_bits meta_data = self._get_metadata() if len(self.data_clusters) == 0: # All metadata for an empty guest image needs 4 clusters: @@ -452,8 +451,8 @@ class Image(object): rfc_blocks = [] for cluster in sorted(self.data_clusters | meta_data): - if cluster / block_size != block_id: - block_id = cluster / block_size + if cluster // block_size != block_id: + block_id = cluster // block_size block_cluster = block_clusters[block_ids.index(block_id)] rfc_table.append(create_table_entry(table_offset, block_cluster, @@ -503,7 +502,7 @@ class Image(object): def write(self, filename): """Write an entire image to the file.""" - image_file = open(filename, 'w') + image_file = open(filename, 'wb') for field in self: image_file.seek(field.offset) image_file.write(struct.pack(field.fmt, field.value)) @@ -518,7 +517,7 @@ class Image(object): rounded = (size + self.cluster_size - 1) & ~(self.cluster_size - 1) if rounded > size: image_file.seek(rounded - 1) - image_file.write("\0") + image_file.write(b'\x00') image_file.close() @staticmethod @@ -587,7 +586,7 @@ class Image(object): def _alloc_data(img_size, cluster_size): """Return a set of random indices of clusters allocated for guest data. """ - num_of_cls = img_size/cluster_size + num_of_cls = img_size // cluster_size return set(random.sample(range(1, num_of_cls + 1), random.randint(0, num_of_cls))) @@ -595,15 +594,15 @@ class Image(object): """Return indices of clusters allocated for image metadata.""" ids = set() for x in self: - ids.add(x.offset/self.cluster_size) + ids.add(x.offset // self.cluster_size) return ids def create_image(test_img_path, backing_file_name=None, backing_file_fmt=None, fields_to_fuzz=None): """Create a fuzzed image and write it to the specified file.""" - image = Image(backing_file_name) - image.set_backing_file_format(backing_file_fmt) + image = Image(backing_file_name.encode()) + image.set_backing_file_format(backing_file_fmt.encode()) image.create_feature_name_table() image.set_end_of_extension_area() image.create_l_structures() |