From patchwork Tue May 26 20:26:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Shinkevich X-Patchwork-Id: 1298437 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=virtuozzo.com Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 49WlrW0thJz9sPF for ; Wed, 27 May 2020 06:27:37 +1000 (AEST) Received: from localhost ([::1]:53396 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jdgAf-0003Zv-JW for incoming@patchwork.ozlabs.org; Tue, 26 May 2020 16:27:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:40176) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jdgAE-0003Zd-9N; Tue, 26 May 2020 16:27:06 -0400 Received: from relay.sw.ru ([185.231.240.75]:48070) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jdgA8-0000mG-P6; Tue, 26 May 2020 16:27:04 -0400 Received: from dhcp-172-16-25-136.sw.ru ([172.16.25.136] helo=localhost.sw.ru) by relay.sw.ru with esmtp (Exim 4.92.3) (envelope-from ) id 1jdg9y-0003rd-73; Tue, 26 May 2020 23:26:50 +0300 From: Andrey Shinkevich To: qemu-block@nongnu.org Subject: [PATCH v2] iotests: Dump QCOW2 dirty bitmaps metadata Date: Tue, 26 May 2020 23:26:47 +0300 Message-Id: <1590524807-821646-1-git-send-email-andrey.shinkevich@virtuozzo.com> X-Mailer: git-send-email 1.8.3.1 Received-SPF: pass client-ip=185.231.240.75; envelope-from=andrey.shinkevich@virtuozzo.com; helo=relay.sw.ru X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/26 16:26:57 X-ACL-Warn: Detected OS = Linux 3.1-3.10 X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, vsementsov@virtuozzo.com, qemu-devel@nongnu.org, mreitz@redhat.com, andrey.shinkevich@virtuozzo.com, den@openvz.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Add dirty bitmap information to QCOW2 metadata dump in qcow2.py script. The sample output: Header extension: Bitmaps magic 0x23852875 length 24 nb_bitmaps 2 reserved32 0 bitmap_directory_size 0x40 bitmap_directory_offset 0x100000 Bitmap name bitmap-1 flag "auto" bitmap_table_offset 0x90000 bitmap_table_size 8 flags 2 type 1 granularity_bits 15 name_size 8 extra_data_size 0 Bitmap table 0 serialized, offset 0xa0000 1 all-zeroes, offset 0x0 2 all-zeroes, offset 0x0 3 all-zeroes, offset 0x0 4 all-zeroes, offset 0x0 5 all-zeroes, offset 0x0 6 all-zeroes, offset 0x0 7 all-zeroes, offset 0x0 Signed-off-by: Andrey Shinkevich --- v2: 01: Refactoring of the Python code in the script qcow2.py. New methods were added. The bitmap dictionary was instantiated. The all of bitmaps information is read completely before printing the dictionary. 02: The outputs of the tests 031, 036 and 061 were modified. tests/qemu-iotests/031.out | 22 +++--- tests/qemu-iotests/036.out | 4 +- tests/qemu-iotests/061.out | 14 ++-- tests/qemu-iotests/qcow2.py | 167 +++++++++++++++++++++++++++++++++++++++++--- 4 files changed, 179 insertions(+), 28 deletions(-) diff --git a/tests/qemu-iotests/031.out b/tests/qemu-iotests/031.out index 46f97c5..0383ebb 100644 --- a/tests/qemu-iotests/031.out +++ b/tests/qemu-iotests/031.out @@ -24,7 +24,7 @@ autoclear_features [] refcount_order 4 header_length 72 -Header extension: +Header extension: Unknown magic 0x12345678 length 31 data 'This is a test header extension' @@ -52,7 +52,7 @@ autoclear_features [] refcount_order 4 header_length 72 -Header extension: +Header extension: Unknown magic 0x12345678 length 31 data 'This is a test header extension' @@ -80,12 +80,12 @@ autoclear_features [] refcount_order 4 header_length 72 -Header extension: +Header extension: Backing format magic 0xe2792aca length 11 data 'host_device' -Header extension: +Header extension: Unknown magic 0x12345678 length 31 data 'This is a test header extension' @@ -115,12 +115,12 @@ autoclear_features [] refcount_order 4 header_length 104 -Header extension: +Header extension: Feature table magic 0x6803f857 length 288 data -Header extension: +Header extension: Unknown magic 0x12345678 length 31 data 'This is a test header extension' @@ -148,12 +148,12 @@ autoclear_features [] refcount_order 4 header_length 104 -Header extension: +Header extension: Feature table magic 0x6803f857 length 288 data -Header extension: +Header extension: Unknown magic 0x12345678 length 31 data 'This is a test header extension' @@ -181,17 +181,17 @@ autoclear_features [] refcount_order 4 header_length 104 -Header extension: +Header extension: Backing format magic 0xe2792aca length 11 data 'host_device' -Header extension: +Header extension: Feature table magic 0x6803f857 length 288 data -Header extension: +Header extension: Unknown magic 0x12345678 length 31 data 'This is a test header extension' diff --git a/tests/qemu-iotests/036.out b/tests/qemu-iotests/036.out index 23b699c..d305f1a 100644 --- a/tests/qemu-iotests/036.out +++ b/tests/qemu-iotests/036.out @@ -24,7 +24,7 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 incompatible_features [] compatible_features [] autoclear_features [63] -Header extension: +Header extension: Feature table magic 0x6803f857 length 288 data @@ -36,7 +36,7 @@ No errors were found on the image. incompatible_features [] compatible_features [] autoclear_features [] -Header extension: +Header extension: Feature table magic 0x6803f857 length 288 data diff --git a/tests/qemu-iotests/061.out b/tests/qemu-iotests/061.out index 5a8d36d..bb4b236 100644 --- a/tests/qemu-iotests/061.out +++ b/tests/qemu-iotests/061.out @@ -24,7 +24,7 @@ autoclear_features [] refcount_order 4 header_length 104 -Header extension: +Header extension: Feature table magic 0x6803f857 length 288 data @@ -82,7 +82,7 @@ autoclear_features [] refcount_order 4 header_length 104 -Header extension: +Header extension: Feature table magic 0x6803f857 length 288 data @@ -138,7 +138,7 @@ autoclear_features [] refcount_order 4 header_length 104 -Header extension: +Header extension: Feature table magic 0x6803f857 length 288 data @@ -193,7 +193,7 @@ autoclear_features [42] refcount_order 4 header_length 104 -Header extension: +Header extension: Feature table magic 0x6803f857 length 288 data @@ -262,7 +262,7 @@ autoclear_features [] refcount_order 4 header_length 104 -Header extension: +Header extension: Feature table magic 0x6803f857 length 288 data @@ -324,7 +324,7 @@ autoclear_features [] refcount_order 4 header_length 104 -Header extension: +Header extension: Feature table magic 0x6803f857 length 288 data @@ -353,7 +353,7 @@ autoclear_features [] refcount_order 4 header_length 104 -Header extension: +Header extension: Feature table magic 0x6803f857 length 288 data diff --git a/tests/qemu-iotests/qcow2.py b/tests/qemu-iotests/qcow2.py index 94a07b2..483decb 100755 --- a/tests/qemu-iotests/qcow2.py +++ b/tests/qemu-iotests/qcow2.py @@ -4,6 +4,132 @@ import sys import struct import string + +class Qcow2BitmapDirEntry: + + name = '' + BME_FLAG_IN_USE = 1 + BME_FLAG_AUTO = 1 << 1 + + uint8_t = 'B' + uint16_t = 'H' + uint32_t = 'I' + uint64_t = 'Q' + + fields = [ + [uint64_t, '%#x', 'bitmap_table_offset'], + [uint32_t, '%d', 'bitmap_table_size'], + [uint32_t, '%d', 'flags'], + [uint8_t, '%d', 'type'], + [uint8_t, '%d', 'granularity_bits'], + [uint16_t, '%d', 'name_size'], + [uint32_t, '%d', 'extra_data_size'] + ] + + fmt = '>' + ''.join(field[0] for field in fields) + + def __init__(self, data): + + entry = struct.unpack(Qcow2BitmapDirEntry.fmt, data) + self.__dict__ = dict((field[2], entry[i]) + for i, field in enumerate( + Qcow2BitmapDirEntry.fields)) + + self.bitmap_table_size = self.bitmap_table_size \ + * struct.calcsize(self.uint64_t) + + def bitmap_dir_entry_raw_size(self): + return struct.calcsize(self.fmt) + self.name_size + \ + self.extra_data_size + + def dump_bitmap_dir_entry(self): + print("%-25s" % 'Bitmap name', self.name) + if (self.flags & self.BME_FLAG_IN_USE) != 0: + print("%-25s" % 'flag', '"in-use"') + if (self.flags & self.BME_FLAG_AUTO) != 0: + print("%-25s" % 'flag', '"auto"') + for f in Qcow2BitmapDirEntry.fields: + value = self.__dict__[f[2]] + value_str = f[1] % value + + print("%-25s" % f[2], value_str) + print("") + + def read_bitmap_table(self, fd): + fd.seek(self.bitmap_table_offset) + table_size = self.bitmap_table_size * struct.calcsize(self.uint64_t) + table = [e[0] for e in struct.iter_unpack('>Q', fd.read(table_size))] + self.bitmap_table = enumerate(table) + + def print_bitmap_table(self): + BME_TABLE_ENTRY_OFFSET_MASK = 0x00fffffffffffe00 + BME_TABLE_ENTRY_FLAG_ALL_ONES = 1 + bmt_type = ['all-zeroes', 'all-ones', 'serialized'] + + print("Bitmap table") + for i, entry in self.bitmap_table: + offset = entry & BME_TABLE_ENTRY_OFFSET_MASK + if offset != 0: + index = 2 + else: + index = entry & BME_TABLE_ENTRY_FLAG_ALL_ONES + print(" %-4d %s, offset %#x" % (i, bmt_type[index], offset)) + print("") + + +class Qcow2BitmapExt: + + uint32_t = 'I' + uint64_t = 'Q' + + fields = [ + [uint32_t, '%d', 'nb_bitmaps'], + [uint32_t, '%d', 'reserved32'], + [uint64_t, '%#x', 'bitmap_directory_size'], + [uint64_t, '%#x', 'bitmap_directory_offset'] + ] + + fmt = '>' + ''.join(field[0] for field in fields) + + def __init__(self, data): + + extension = struct.unpack(Qcow2BitmapExt.fmt, data) + self.__dict__ = dict((field[2], extension[i]) + for i, field in enumerate(Qcow2BitmapExt.fields)) + + def dump_bitmap_ext(self): + for f in Qcow2BitmapExt.fields: + value = self.__dict__[f[2]] + value_str = f[1] % value + + print("%-25s" % f[2], value_str) + print("") + + def read_bitmap_directory(self, fd): + self.bitmaps = [] + fd.seek(self.bitmap_directory_offset) + buf_size = struct.calcsize(Qcow2BitmapDirEntry.fmt) + + for n in range(self.nb_bitmaps): + buf = fd.read(buf_size) + dir_entry = Qcow2BitmapDirEntry(buf) + fd.seek(dir_entry.extra_data_size, 1) + bitmap_name = fd.read(dir_entry.name_size) + dir_entry.name = bitmap_name.decode('ascii') + self.bitmaps.append(dir_entry) + entry_raw_size = dir_entry.bitmap_dir_entry_raw_size() + shift = ((entry_raw_size + 7) & ~7) - entry_raw_size + fd.seek(shift, 1) + + for bm in self.bitmaps: + bm.read_bitmap_table(fd) + + def print_bitmaps(self): + for bm in self.bitmaps: + bm.dump_bitmap_dir_entry() + bm.print_bitmap_table() + + class QcowHeaderExtension: def __init__(self, magic, length, data): @@ -21,6 +147,11 @@ class QcowHeaderExtension: class QcowHeader: + QCOW2_EXT_MAGIC_BACKING_FORMAT = 0xE2792ACA + QCOW2_EXT_MAGIC_FEATURE_TABLE = 0x6803f857 + QCOW2_EXT_MAGIC_CRYPTO_HEADER = 0x0537be77 + QCOW2_EXT_MAGIC_BITMAPS = 0x23852875 + QCOW2_EXT_MAGIC_DATA_FILE = 0x44415441 uint32_t = 'I' uint64_t = 'Q' @@ -127,6 +258,15 @@ class QcowHeader: buf = buf[0:header_bytes-1] fd.write(buf) + def extension_name(self, magic): + return { + self.QCOW2_EXT_MAGIC_BACKING_FORMAT: 'Backing format', + self.QCOW2_EXT_MAGIC_FEATURE_TABLE: 'Feature table', + self.QCOW2_EXT_MAGIC_CRYPTO_HEADER: 'Crypto header', + self.QCOW2_EXT_MAGIC_BITMAPS: 'Bitmaps', + self.QCOW2_EXT_MAGIC_DATA_FILE: 'Data file', + }.get(magic, 'Unknown') + def dump(self): for f in QcowHeader.fields: value = self.__dict__[f[2]] @@ -142,30 +282,41 @@ class QcowHeader: print("%-25s" % f[2], value_str) print("") - def dump_extensions(self): + def dump_extensions(self, fd): for ex in self.extensions: + print("%-25s %s" % ("Header extension:", self.extension_name( + ex.magic))) + print("%-25s %#x" % ("magic", ex.magic)) + print("%-25s %d" % ("length", ex.length)) + data = ex.data[:ex.length] if all(c in string.printable.encode('ascii') for c in data): data = "'%s'" % data.decode('ascii') + print("%-25s %s" % ("data", data)) else: - data = "" + self.dump_extension_data(fd, ex) - print("Header extension:") - print("%-25s %#x" % ("magic", ex.magic)) - print("%-25s %d" % ("length", ex.length)) - print("%-25s %s" % ("data", data)) print("") + def dump_extension_data(self, fd, ext): + if ext.magic == self.QCOW2_EXT_MAGIC_BITMAPS: + b_ext = Qcow2BitmapExt(ext.data) + b_ext.dump_bitmap_ext() + b_ext.read_bitmap_directory(fd) + b_ext.print_bitmaps() + else: + print("%-25s %s" % ("data", "")) + def cmd_dump_header(fd): h = QcowHeader(fd) h.dump() - h.dump_extensions() + h.dump_extensions(fd) def cmd_dump_header_exts(fd): h = QcowHeader(fd) - h.dump_extensions() + h.dump_extensions(fd) def cmd_set_header(fd, name, value): try: