From patchwork Tue May 26 14:54:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Shinkevich X-Patchwork-Id: 1298133 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 49WcSq3Px3z9sRY for ; Wed, 27 May 2020 00:55:06 +1000 (AEST) Received: from localhost ([::1]:47540 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jdayu-0000m9-0F for incoming@patchwork.ozlabs.org; Tue, 26 May 2020 10:55:04 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:43214) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jdayX-0000hf-5J; Tue, 26 May 2020 10:54:41 -0400 Received: from relay.sw.ru ([185.231.240.75]:37058) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jdayU-0005yA-FQ; Tue, 26 May 2020 10:54:39 -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 1jdayL-0001Qx-0O; Tue, 26 May 2020 17:54:29 +0300 From: Andrey Shinkevich To: qemu-block@nongnu.org Subject: [PATCH] iotests: Dump QCOW2 dirty bitmaps metadata Date: Tue, 26 May 2020 17:54:26 +0300 Message-Id: <1590504866-679474-1-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 10:54:34 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 --- tests/qemu-iotests/qcow2.py | 149 +++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 141 insertions(+), 8 deletions(-) diff --git a/tests/qemu-iotests/qcow2.py b/tests/qemu-iotests/qcow2.py index 91e4420..41aa030 100755 --- a/tests/qemu-iotests/qcow2.py +++ b/tests/qemu-iotests/qcow2.py @@ -5,6 +5,122 @@ 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_size(self): + size = struct.calcsize(self.fmt) + self.name_size + \ + self.extra_data_size + return (size + 7) & ~7 + + 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 dump_bitmap_table(self, fd): + fd.seek(self.bitmap_table_offset) + table_size = self.bitmap_table_size * struct.calcsize(self.uint64_t) + bitmap_table = [e[0] for e in struct.iter_unpack('>Q', + fd.read(table_size))] + BME_TABLE_ENTRY_OFFSET_MASK = 0x00fffffffffffe00 + BME_TABLE_ENTRY_FLAG_ALL_ONES = 1 + bmt_type = ['all-zeroes', 'all-ones', 'serialized'] + items = enumerate(bitmap_table) + print("Bitmap table") + for i, entry in items: + 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 bitmap_directory(self, fd): + offset = self.bitmap_directory_offset + buf_size = struct.calcsize(Qcow2BitmapDirEntry.fmt) + + for n in range(self.nb_bitmaps): + fd.seek(offset) + 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') + dir_entry.dump_bitmap_dir_entry() + dir_entry.dump_bitmap_table(fd) + offset += dir_entry.bitmap_dir_entry_size() + + class QcowHeaderExtension: def __init__(self, magic, length, data): @@ -22,6 +138,8 @@ class QcowHeaderExtension: class QcowHeader: + QCOW2_EXT_MAGIC_FEATURE_TABLE = 0x6803f857 + QCOW2_EXT_MAGIC_BITMAPS = 0x23852875 uint32_t = 'I' uint64_t = 'Q' @@ -128,6 +246,12 @@ class QcowHeader: buf = buf[0:header_bytes-1] fd.write(buf) + def extension_name(self, magic): + return { + self.QCOW2_EXT_MAGIC_FEATURE_TABLE: 'Feature table', + self.QCOW2_EXT_MAGIC_BITMAPS: 'Bitmaps', + }.get(magic, 'Unknown') + def dump(self): for f in QcowHeader.fields: value = self.__dict__[f[2]] @@ -143,30 +267,39 @@ class QcowHeader: print("%-25s" % f[2], value_str) print("") - def dump_extensions(self): + def dump_extensions(self, fd): for ex in self.extensions: + print("Header extension (%s):" % 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.bitmap_directory(fd) + 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: