mirror of
https://gitlab.com/qemu-project/qemu
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61f3c91a67
There is no "version 2" of the "Lesser" General Public License. It is either "GPL version 2.0" or "Lesser GPL version 2.1". This patch replaces all occurrences of "Lesser GPL version 2" with "Lesser GPL version 2.1" in comment section. This patch contains all the files, whose maintainer I could not get from ‘get_maintainer.pl’ script. Signed-off-by: Chetan Pant <chetan4windows@gmail.com> Message-Id: <20201023124424.20177-1-chetan4windows@gmail.com> Reviewed-by: Thomas Huth <thuth@redhat.com> [thuth: Adapted exec.c and qdev-monitor.c to new location] Signed-off-by: Thomas Huth <thuth@redhat.com>
613 lines
20 KiB
Python
Executable file
613 lines
20 KiB
Python
Executable file
#!/usr/bin/env python3
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#
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# Migration Stream Analyzer
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#
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# Copyright (c) 2015 Alexander Graf <agraf@suse.de>
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, see <http://www.gnu.org/licenses/>.
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import json
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import os
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import argparse
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import collections
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import struct
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import sys
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def mkdir_p(path):
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try:
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os.makedirs(path)
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except OSError:
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pass
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class MigrationFile(object):
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def __init__(self, filename):
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self.filename = filename
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self.file = open(self.filename, "rb")
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def read64(self):
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return int.from_bytes(self.file.read(8), byteorder='big', signed=True)
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def read32(self):
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return int.from_bytes(self.file.read(4), byteorder='big', signed=True)
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def read16(self):
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return int.from_bytes(self.file.read(2), byteorder='big', signed=True)
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def read8(self):
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return int.from_bytes(self.file.read(1), byteorder='big', signed=True)
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def readstr(self, len = None):
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return self.readvar(len).decode('utf-8')
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def readvar(self, size = None):
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if size is None:
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size = self.read8()
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if size == 0:
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return ""
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value = self.file.read(size)
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if len(value) != size:
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raise Exception("Unexpected end of %s at 0x%x" % (self.filename, self.file.tell()))
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return value
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def tell(self):
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return self.file.tell()
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# The VMSD description is at the end of the file, after EOF. Look for
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# the last NULL byte, then for the beginning brace of JSON.
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def read_migration_debug_json(self):
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QEMU_VM_VMDESCRIPTION = 0x06
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# Remember the offset in the file when we started
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entrypos = self.file.tell()
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# Read the last 10MB
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self.file.seek(0, os.SEEK_END)
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endpos = self.file.tell()
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self.file.seek(max(-endpos, -10 * 1024 * 1024), os.SEEK_END)
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datapos = self.file.tell()
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data = self.file.read()
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# The full file read closed the file as well, reopen it
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self.file = open(self.filename, "rb")
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# Find the last NULL byte, then the first brace after that. This should
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# be the beginning of our JSON data.
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nulpos = data.rfind(b'\0')
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jsonpos = data.find(b'{', nulpos)
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# Check backwards from there and see whether we guessed right
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self.file.seek(datapos + jsonpos - 5, 0)
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if self.read8() != QEMU_VM_VMDESCRIPTION:
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raise Exception("No Debug Migration device found")
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jsonlen = self.read32()
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# Seek back to where we were at the beginning
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self.file.seek(entrypos, 0)
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# explicit decode() needed for Python 3.5 compatibility
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return data[jsonpos:jsonpos + jsonlen].decode("utf-8")
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def close(self):
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self.file.close()
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class RamSection(object):
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RAM_SAVE_FLAG_COMPRESS = 0x02
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RAM_SAVE_FLAG_MEM_SIZE = 0x04
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RAM_SAVE_FLAG_PAGE = 0x08
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RAM_SAVE_FLAG_EOS = 0x10
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RAM_SAVE_FLAG_CONTINUE = 0x20
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RAM_SAVE_FLAG_XBZRLE = 0x40
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RAM_SAVE_FLAG_HOOK = 0x80
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def __init__(self, file, version_id, ramargs, section_key):
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if version_id != 4:
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raise Exception("Unknown RAM version %d" % version_id)
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self.file = file
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self.section_key = section_key
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self.TARGET_PAGE_SIZE = ramargs['page_size']
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self.dump_memory = ramargs['dump_memory']
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self.write_memory = ramargs['write_memory']
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self.sizeinfo = collections.OrderedDict()
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self.data = collections.OrderedDict()
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self.data['section sizes'] = self.sizeinfo
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self.name = ''
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if self.write_memory:
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self.files = { }
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if self.dump_memory:
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self.memory = collections.OrderedDict()
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self.data['memory'] = self.memory
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def __repr__(self):
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return self.data.__repr__()
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def __str__(self):
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return self.data.__str__()
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def getDict(self):
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return self.data
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def read(self):
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# Read all RAM sections
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while True:
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addr = self.file.read64()
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flags = addr & (self.TARGET_PAGE_SIZE - 1)
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addr &= ~(self.TARGET_PAGE_SIZE - 1)
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if flags & self.RAM_SAVE_FLAG_MEM_SIZE:
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while True:
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namelen = self.file.read8()
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# We assume that no RAM chunk is big enough to ever
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# hit the first byte of the address, so when we see
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# a zero here we know it has to be an address, not the
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# length of the next block.
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if namelen == 0:
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self.file.file.seek(-1, 1)
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break
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self.name = self.file.readstr(len = namelen)
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len = self.file.read64()
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self.sizeinfo[self.name] = '0x%016x' % len
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if self.write_memory:
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print(self.name)
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mkdir_p('./' + os.path.dirname(self.name))
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f = open('./' + self.name, "wb")
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f.truncate(0)
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f.truncate(len)
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self.files[self.name] = f
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flags &= ~self.RAM_SAVE_FLAG_MEM_SIZE
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if flags & self.RAM_SAVE_FLAG_COMPRESS:
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if flags & self.RAM_SAVE_FLAG_CONTINUE:
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flags &= ~self.RAM_SAVE_FLAG_CONTINUE
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else:
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self.name = self.file.readstr()
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fill_char = self.file.read8()
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# The page in question is filled with fill_char now
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if self.write_memory and fill_char != 0:
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self.files[self.name].seek(addr, os.SEEK_SET)
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self.files[self.name].write(chr(fill_char) * self.TARGET_PAGE_SIZE)
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if self.dump_memory:
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self.memory['%s (0x%016x)' % (self.name, addr)] = 'Filled with 0x%02x' % fill_char
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flags &= ~self.RAM_SAVE_FLAG_COMPRESS
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elif flags & self.RAM_SAVE_FLAG_PAGE:
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if flags & self.RAM_SAVE_FLAG_CONTINUE:
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flags &= ~self.RAM_SAVE_FLAG_CONTINUE
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else:
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self.name = self.file.readstr()
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if self.write_memory or self.dump_memory:
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data = self.file.readvar(size = self.TARGET_PAGE_SIZE)
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else: # Just skip RAM data
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self.file.file.seek(self.TARGET_PAGE_SIZE, 1)
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if self.write_memory:
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self.files[self.name].seek(addr, os.SEEK_SET)
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self.files[self.name].write(data)
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if self.dump_memory:
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hexdata = " ".join("{0:02x}".format(ord(c)) for c in data)
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self.memory['%s (0x%016x)' % (self.name, addr)] = hexdata
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flags &= ~self.RAM_SAVE_FLAG_PAGE
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elif flags & self.RAM_SAVE_FLAG_XBZRLE:
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raise Exception("XBZRLE RAM compression is not supported yet")
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elif flags & self.RAM_SAVE_FLAG_HOOK:
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raise Exception("RAM hooks don't make sense with files")
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# End of RAM section
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if flags & self.RAM_SAVE_FLAG_EOS:
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break
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if flags != 0:
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raise Exception("Unknown RAM flags: %x" % flags)
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def __del__(self):
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if self.write_memory:
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for key in self.files:
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self.files[key].close()
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class HTABSection(object):
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HASH_PTE_SIZE_64 = 16
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def __init__(self, file, version_id, device, section_key):
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if version_id != 1:
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raise Exception("Unknown HTAB version %d" % version_id)
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self.file = file
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self.section_key = section_key
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def read(self):
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header = self.file.read32()
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if (header == -1):
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# "no HPT" encoding
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return
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if (header > 0):
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# First section, just the hash shift
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return
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# Read until end marker
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while True:
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index = self.file.read32()
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n_valid = self.file.read16()
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n_invalid = self.file.read16()
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if index == 0 and n_valid == 0 and n_invalid == 0:
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break
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self.file.readvar(n_valid * self.HASH_PTE_SIZE_64)
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def getDict(self):
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return ""
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class ConfigurationSection(object):
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def __init__(self, file):
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self.file = file
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def read(self):
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name_len = self.file.read32()
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name = self.file.readstr(len = name_len)
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class VMSDFieldGeneric(object):
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def __init__(self, desc, file):
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self.file = file
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self.desc = desc
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self.data = ""
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def __repr__(self):
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return str(self.__str__())
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def __str__(self):
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return " ".join("{0:02x}".format(c) for c in self.data)
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def getDict(self):
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return self.__str__()
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def read(self):
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size = int(self.desc['size'])
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self.data = self.file.readvar(size)
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return self.data
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class VMSDFieldInt(VMSDFieldGeneric):
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def __init__(self, desc, file):
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super(VMSDFieldInt, self).__init__(desc, file)
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self.size = int(desc['size'])
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self.format = '0x%%0%dx' % (self.size * 2)
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self.sdtype = '>i%d' % self.size
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self.udtype = '>u%d' % self.size
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def __repr__(self):
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if self.data < 0:
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return ('%s (%d)' % ((self.format % self.udata), self.data))
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else:
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return self.format % self.data
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def __str__(self):
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return self.__repr__()
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def getDict(self):
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return self.__str__()
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def read(self):
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super(VMSDFieldInt, self).read()
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self.sdata = int.from_bytes(self.data, byteorder='big', signed=True)
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self.udata = int.from_bytes(self.data, byteorder='big', signed=False)
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self.data = self.sdata
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return self.data
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class VMSDFieldUInt(VMSDFieldInt):
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def __init__(self, desc, file):
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super(VMSDFieldUInt, self).__init__(desc, file)
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def read(self):
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super(VMSDFieldUInt, self).read()
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self.data = self.udata
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return self.data
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class VMSDFieldIntLE(VMSDFieldInt):
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def __init__(self, desc, file):
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super(VMSDFieldIntLE, self).__init__(desc, file)
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self.dtype = '<i%d' % self.size
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class VMSDFieldBool(VMSDFieldGeneric):
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def __init__(self, desc, file):
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super(VMSDFieldBool, self).__init__(desc, file)
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def __repr__(self):
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return self.data.__repr__()
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def __str__(self):
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return self.data.__str__()
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def getDict(self):
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return self.data
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def read(self):
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super(VMSDFieldBool, self).read()
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if self.data[0] == 0:
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self.data = False
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else:
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self.data = True
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return self.data
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class VMSDFieldStruct(VMSDFieldGeneric):
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QEMU_VM_SUBSECTION = 0x05
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def __init__(self, desc, file):
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super(VMSDFieldStruct, self).__init__(desc, file)
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self.data = collections.OrderedDict()
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# When we see compressed array elements, unfold them here
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new_fields = []
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for field in self.desc['struct']['fields']:
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if not 'array_len' in field:
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new_fields.append(field)
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continue
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array_len = field.pop('array_len')
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field['index'] = 0
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new_fields.append(field)
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for i in range(1, array_len):
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c = field.copy()
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c['index'] = i
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new_fields.append(c)
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self.desc['struct']['fields'] = new_fields
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def __repr__(self):
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return self.data.__repr__()
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def __str__(self):
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return self.data.__str__()
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def read(self):
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for field in self.desc['struct']['fields']:
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try:
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reader = vmsd_field_readers[field['type']]
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except:
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reader = VMSDFieldGeneric
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field['data'] = reader(field, self.file)
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field['data'].read()
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if 'index' in field:
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if field['name'] not in self.data:
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self.data[field['name']] = []
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a = self.data[field['name']]
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if len(a) != int(field['index']):
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raise Exception("internal index of data field unmatched (%d/%d)" % (len(a), int(field['index'])))
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a.append(field['data'])
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else:
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self.data[field['name']] = field['data']
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if 'subsections' in self.desc['struct']:
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for subsection in self.desc['struct']['subsections']:
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if self.file.read8() != self.QEMU_VM_SUBSECTION:
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raise Exception("Subsection %s not found at offset %x" % ( subsection['vmsd_name'], self.file.tell()))
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name = self.file.readstr()
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version_id = self.file.read32()
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self.data[name] = VMSDSection(self.file, version_id, subsection, (name, 0))
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self.data[name].read()
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def getDictItem(self, value):
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# Strings would fall into the array category, treat
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# them specially
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if value.__class__ is ''.__class__:
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return value
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try:
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return self.getDictOrderedDict(value)
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except:
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try:
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return self.getDictArray(value)
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except:
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try:
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return value.getDict()
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except:
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return value
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def getDictArray(self, array):
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r = []
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for value in array:
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r.append(self.getDictItem(value))
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return r
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def getDictOrderedDict(self, dict):
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r = collections.OrderedDict()
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for (key, value) in dict.items():
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r[key] = self.getDictItem(value)
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return r
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def getDict(self):
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return self.getDictOrderedDict(self.data)
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vmsd_field_readers = {
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"bool" : VMSDFieldBool,
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"int8" : VMSDFieldInt,
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"int16" : VMSDFieldInt,
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"int32" : VMSDFieldInt,
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"int32 equal" : VMSDFieldInt,
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"int32 le" : VMSDFieldIntLE,
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"int64" : VMSDFieldInt,
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"uint8" : VMSDFieldUInt,
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"uint16" : VMSDFieldUInt,
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"uint32" : VMSDFieldUInt,
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"uint32 equal" : VMSDFieldUInt,
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"uint64" : VMSDFieldUInt,
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"int64 equal" : VMSDFieldInt,
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"uint8 equal" : VMSDFieldInt,
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"uint16 equal" : VMSDFieldInt,
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"float64" : VMSDFieldGeneric,
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"timer" : VMSDFieldGeneric,
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"buffer" : VMSDFieldGeneric,
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"unused_buffer" : VMSDFieldGeneric,
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"bitmap" : VMSDFieldGeneric,
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"struct" : VMSDFieldStruct,
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"unknown" : VMSDFieldGeneric,
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}
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class VMSDSection(VMSDFieldStruct):
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def __init__(self, file, version_id, device, section_key):
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self.file = file
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self.data = ""
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self.vmsd_name = ""
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self.section_key = section_key
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desc = device
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if 'vmsd_name' in device:
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self.vmsd_name = device['vmsd_name']
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# A section really is nothing but a FieldStruct :)
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super(VMSDSection, self).__init__({ 'struct' : desc }, file)
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###############################################################################
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class MigrationDump(object):
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QEMU_VM_FILE_MAGIC = 0x5145564d
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QEMU_VM_FILE_VERSION = 0x00000003
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QEMU_VM_EOF = 0x00
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QEMU_VM_SECTION_START = 0x01
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QEMU_VM_SECTION_PART = 0x02
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QEMU_VM_SECTION_END = 0x03
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QEMU_VM_SECTION_FULL = 0x04
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QEMU_VM_SUBSECTION = 0x05
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QEMU_VM_VMDESCRIPTION = 0x06
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QEMU_VM_CONFIGURATION = 0x07
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QEMU_VM_SECTION_FOOTER= 0x7e
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def __init__(self, filename):
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self.section_classes = { ( 'ram', 0 ) : [ RamSection, None ],
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( 'spapr/htab', 0) : ( HTABSection, None ) }
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self.filename = filename
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self.vmsd_desc = None
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def read(self, desc_only = False, dump_memory = False, write_memory = False):
|
|
# Read in the whole file
|
|
file = MigrationFile(self.filename)
|
|
|
|
# File magic
|
|
data = file.read32()
|
|
if data != self.QEMU_VM_FILE_MAGIC:
|
|
raise Exception("Invalid file magic %x" % data)
|
|
|
|
# Version (has to be v3)
|
|
data = file.read32()
|
|
if data != self.QEMU_VM_FILE_VERSION:
|
|
raise Exception("Invalid version number %d" % data)
|
|
|
|
self.load_vmsd_json(file)
|
|
|
|
# Read sections
|
|
self.sections = collections.OrderedDict()
|
|
|
|
if desc_only:
|
|
return
|
|
|
|
ramargs = {}
|
|
ramargs['page_size'] = self.vmsd_desc['page_size']
|
|
ramargs['dump_memory'] = dump_memory
|
|
ramargs['write_memory'] = write_memory
|
|
self.section_classes[('ram',0)][1] = ramargs
|
|
|
|
while True:
|
|
section_type = file.read8()
|
|
if section_type == self.QEMU_VM_EOF:
|
|
break
|
|
elif section_type == self.QEMU_VM_CONFIGURATION:
|
|
section = ConfigurationSection(file)
|
|
section.read()
|
|
elif section_type == self.QEMU_VM_SECTION_START or section_type == self.QEMU_VM_SECTION_FULL:
|
|
section_id = file.read32()
|
|
name = file.readstr()
|
|
instance_id = file.read32()
|
|
version_id = file.read32()
|
|
section_key = (name, instance_id)
|
|
classdesc = self.section_classes[section_key]
|
|
section = classdesc[0](file, version_id, classdesc[1], section_key)
|
|
self.sections[section_id] = section
|
|
section.read()
|
|
elif section_type == self.QEMU_VM_SECTION_PART or section_type == self.QEMU_VM_SECTION_END:
|
|
section_id = file.read32()
|
|
self.sections[section_id].read()
|
|
elif section_type == self.QEMU_VM_SECTION_FOOTER:
|
|
read_section_id = file.read32()
|
|
if read_section_id != section_id:
|
|
raise Exception("Mismatched section footer: %x vs %x" % (read_section_id, section_id))
|
|
else:
|
|
raise Exception("Unknown section type: %d" % section_type)
|
|
file.close()
|
|
|
|
def load_vmsd_json(self, file):
|
|
vmsd_json = file.read_migration_debug_json()
|
|
self.vmsd_desc = json.loads(vmsd_json, object_pairs_hook=collections.OrderedDict)
|
|
for device in self.vmsd_desc['devices']:
|
|
key = (device['name'], device['instance_id'])
|
|
value = ( VMSDSection, device )
|
|
self.section_classes[key] = value
|
|
|
|
def getDict(self):
|
|
r = collections.OrderedDict()
|
|
for (key, value) in self.sections.items():
|
|
key = "%s (%d)" % ( value.section_key[0], key )
|
|
r[key] = value.getDict()
|
|
return r
|
|
|
|
###############################################################################
|
|
|
|
class JSONEncoder(json.JSONEncoder):
|
|
def default(self, o):
|
|
if isinstance(o, VMSDFieldGeneric):
|
|
return str(o)
|
|
return json.JSONEncoder.default(self, o)
|
|
|
|
parser = argparse.ArgumentParser()
|
|
parser.add_argument("-f", "--file", help='migration dump to read from', required=True)
|
|
parser.add_argument("-m", "--memory", help='dump RAM contents as well', action='store_true')
|
|
parser.add_argument("-d", "--dump", help='what to dump ("state" or "desc")', default='state')
|
|
parser.add_argument("-x", "--extract", help='extract contents into individual files', action='store_true')
|
|
args = parser.parse_args()
|
|
|
|
jsonenc = JSONEncoder(indent=4, separators=(',', ': '))
|
|
|
|
if args.extract:
|
|
dump = MigrationDump(args.file)
|
|
|
|
dump.read(desc_only = True)
|
|
print("desc.json")
|
|
f = open("desc.json", "wb")
|
|
f.truncate()
|
|
f.write(jsonenc.encode(dump.vmsd_desc))
|
|
f.close()
|
|
|
|
dump.read(write_memory = True)
|
|
dict = dump.getDict()
|
|
print("state.json")
|
|
f = open("state.json", "wb")
|
|
f.truncate()
|
|
f.write(jsonenc.encode(dict))
|
|
f.close()
|
|
elif args.dump == "state":
|
|
dump = MigrationDump(args.file)
|
|
dump.read(dump_memory = args.memory)
|
|
dict = dump.getDict()
|
|
print(jsonenc.encode(dict))
|
|
elif args.dump == "desc":
|
|
dump = MigrationDump(args.file)
|
|
dump.read(desc_only = True)
|
|
print(jsonenc.encode(dump.vmsd_desc))
|
|
else:
|
|
raise Exception("Please specify either -x, -d state or -d dump")
|