forked from Imagelibrary/littlefs
6dcdf1ed61
It's probably better to have a separate names for a tag category and any specific name, but I can't think of a better name for this tag, and I hadn't noticed that I was already ignoring the C prefix for CCKSUM tags in many places. NAME/CKSUM now mean both the specific tag and tag category, which is a bit of a hack since both happen to be the 0th-subtype of their categories.
1062 lines
35 KiB
Python
Executable File
1062 lines
35 KiB
Python
Executable File
#!/usr/bin/env python3
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import bisect
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import collections as co
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import itertools as it
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import math as m
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import os
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import struct
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COLORS = [
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'34', # blue
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'31', # red
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'32', # green
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'35', # purple
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'33', # yellow
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'36', # cyan
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]
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TAG_NULL = 0x0000
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TAG_CONFIG = 0x0000
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TAG_MAGIC = 0x0003
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TAG_VERSION = 0x0004
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TAG_FLAGS = 0x0005
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TAG_CKSUMTYPE = 0x0006
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TAG_REDUNDTYPE = 0x0007
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TAG_BLOCKLIMIT = 0x0008
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TAG_DISKLIMIT = 0x0009
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TAG_MLEAFLIMIT = 0x000a
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TAG_SIZELIMIT = 0x000b
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TAG_NAMELIMIT = 0x000c
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TAG_UTAGLIMIT = 0x000d
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TAG_UATTRLIMIT = 0x000e
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TAG_GSTATE = 0x0100
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TAG_GRM = 0x0100
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TAG_NAME = 0x0200
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TAG_BOOKMARK = 0x0201
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TAG_REG = 0x0202
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TAG_DIR = 0x0203
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TAG_STRUCT = 0x0300
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TAG_DATA = 0x0300
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TAG_TRUNK = 0x0304
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TAG_BLOCK = 0x0308
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TAG_BTREE = 0x030c
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TAG_BRANCH = 0x031c
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TAG_MDIR = 0x0321
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TAG_MTREE = 0x0324
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TAG_MROOT = 0x0329
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TAG_DID = 0x032c
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TAG_UATTR = 0x0400
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TAG_SATTR = 0x0600
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TAG_SHRUB = 0x1000
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TAG_CKSUM = 0x3000
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TAG_ECKSUM = 0x3100
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TAG_ALT = 0x4000
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TAG_GT = 0x2000
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TAG_R = 0x1000
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# parse some rbyd addr encodings
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# 0xa -> [0xa]
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# 0xa.b -> ([0xa], b)
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# 0x{a,b} -> [0xa, 0xb]
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def rbydaddr(s):
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s = s.strip()
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b = 10
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if s.startswith('0x') or s.startswith('0X'):
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s = s[2:]
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b = 16
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elif s.startswith('0o') or s.startswith('0O'):
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s = s[2:]
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b = 8
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elif s.startswith('0b') or s.startswith('0B'):
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s = s[2:]
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b = 2
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trunk = None
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if '.' in s:
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s, s_ = s.split('.', 1)
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trunk = int(s_, b)
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if s.startswith('{') and '}' in s:
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ss = s[1:s.find('}')].split(',')
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else:
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ss = [s]
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addr = []
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for s in ss:
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if trunk is not None:
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addr.append((int(s, b), trunk))
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else:
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addr.append(int(s, b))
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return addr
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def crc32c(data, crc=0):
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crc ^= 0xffffffff
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for b in data:
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crc ^= b
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for j in range(8):
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crc = (crc >> 1) ^ ((crc & 1) * 0x82f63b78)
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return 0xffffffff ^ crc
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def fromle32(data):
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return struct.unpack('<I', data[0:4].ljust(4, b'\0'))[0]
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def fromleb128(data):
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word = 0
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for i, b in enumerate(data):
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word |= ((b & 0x7f) << 7*i)
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word &= 0xffffffff
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if not b & 0x80:
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return word, i+1
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return word, len(data)
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def fromtag(data):
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data = data.ljust(4, b'\0')
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tag = (data[0] << 8) | data[1]
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weight, d = fromleb128(data[2:])
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size, d_ = fromleb128(data[2+d:])
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return tag>>15, tag&0x7fff, weight, size, 2+d+d_
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def popc(x):
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return bin(x).count('1')
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def xxd(data, width=16):
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for i in range(0, len(data), width):
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yield '%-*s %-*s' % (
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3*width,
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' '.join('%02x' % b for b in data[i:i+width]),
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width,
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''.join(
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b if b >= ' ' and b <= '~' else '.'
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for b in map(chr, data[i:i+width])))
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def tagrepr(tag, w, size, off=None):
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if (tag & 0xefff) == TAG_NULL:
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return '%snull%s%s' % (
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'shrub' if tag & TAG_SHRUB else '',
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' w%d' % w if w else '',
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' %d' % size if size else '')
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elif (tag & 0xef00) == TAG_CONFIG:
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return '%s%s%s %d' % (
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'shrub' if tag & TAG_SHRUB else '',
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'magic' if (tag & 0xfff) == TAG_MAGIC
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else 'version' if (tag & 0xfff) == TAG_VERSION
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else 'flags' if (tag & 0xfff) == TAG_FLAGS
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else 'cksumtype' if (tag & 0xfff) == TAG_CKSUMTYPE
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else 'redundtype' if (tag & 0xfff) == TAG_REDUNDTYPE
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else 'blocklimit' if (tag & 0xfff) == TAG_BLOCKLIMIT
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else 'disklimit' if (tag & 0xfff) == TAG_DISKLIMIT
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else 'mleaflimit' if (tag & 0xfff) == TAG_MLEAFLIMIT
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else 'sizelimit' if (tag & 0xfff) == TAG_SIZELIMIT
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else 'namelimit' if (tag & 0xfff) == TAG_NAMELIMIT
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else 'utaglimit' if (tag & 0xfff) == TAG_UTAGLIMIT
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else 'uattrlimit' if (tag & 0xfff) == TAG_UATTRLIMIT
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else 'config 0x%02x' % (tag & 0xff),
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' w%d' % w if w else '',
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size)
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elif (tag & 0xef00) == TAG_GSTATE:
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return '%s%s%s %d' % (
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'shrub' if tag & TAG_SHRUB else '',
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'grm' if (tag & 0xfff) == TAG_GRM
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else 'gstate 0x%02x' % (tag & 0xff),
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' w%d' % w if w else '',
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size)
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elif (tag & 0xef00) == TAG_NAME:
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return '%s%s%s %d' % (
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'shrub' if tag & TAG_SHRUB else '',
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'name' if (tag & 0xfff) == TAG_NAME
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else 'bookmark' if (tag & 0xfff) == TAG_BOOKMARK
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else 'reg' if (tag & 0xfff) == TAG_REG
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else 'dir' if (tag & 0xfff) == TAG_DIR
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else 'name 0x%02x' % (tag & 0xff),
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' w%d' % w if w else '',
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size)
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elif (tag & 0xef00) == TAG_STRUCT:
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return '%s%s%s %d' % (
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'shrub' if tag & TAG_SHRUB else '',
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'data' if (tag & 0xfff) == TAG_DATA
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else 'trunk' if (tag & 0xfff) == TAG_TRUNK
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else 'block' if (tag & 0xfff) == TAG_BLOCK
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else 'btree' if (tag & 0xfff) == TAG_BTREE
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else 'branch' if (tag & 0xfff) == TAG_BRANCH
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else 'mdir' if (tag & 0xfff) == TAG_MDIR
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else 'mtree' if (tag & 0xfff) == TAG_MTREE
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else 'mroot' if (tag & 0xfff) == TAG_MROOT
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else 'did' if (tag & 0xfff) == TAG_DID
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else 'struct 0x%02x' % (tag & 0xff),
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' w%d' % w if w else '',
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size)
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elif (tag & 0xef00) == TAG_UATTR:
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return '%suattr 0x%02x%s %d' % (
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'shrub' if tag & TAG_SHRUB else '',
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((tag & 0x100) >> 1) | (tag & 0xff),
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' w%d' % w if w else '',
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size)
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elif (tag & 0xef00) == TAG_SATTR:
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return '%ssattr 0x%02x%s %d' % (
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'shrub' if tag & TAG_SHRUB else '',
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((tag & 0x100) >> 1) | (tag & 0xff),
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' w%d' % w if w else '',
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size)
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elif (tag & 0xff00) == TAG_CKSUM:
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return 'cksum 0x%02x%s %d' % (
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tag & 0xff,
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' w%d' % w if w > 0 else '',
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size)
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elif (tag & 0xff00) == TAG_ECKSUM:
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return 'ecksum%s%s %d' % (
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' 0x%02x' % (tag & 0xff) if tag & 0xff else '',
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' w%d' % w if w > 0 else '',
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size)
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elif tag & TAG_ALT:
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return 'alt%s%s 0x%x w%d %s' % (
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'r' if tag & TAG_R else 'b',
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'gt' if tag & TAG_GT else 'le',
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tag & 0x0fff,
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w,
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'0x%x' % (0xffffffff & (off-size))
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if off is not None
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else '-%d' % off)
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else:
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return '0x%04x w%d %d' % (tag, w, size)
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def dbg_log(data, block_size, rev, eoff, weight, *,
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color=False,
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**args):
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cksum = crc32c(data[0:4])
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# preprocess jumps
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if args.get('jumps'):
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jumps = []
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j_ = 4
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while j_ < (block_size if args.get('all') else eoff):
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j = j_
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v, tag, w, size, d = fromtag(data[j_:])
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j_ += d
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if not tag & TAG_ALT:
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j_ += size
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if tag & TAG_ALT:
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# figure out which alt color
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if tag & TAG_R:
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_, ntag, _, _, _ = fromtag(data[j_:])
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if ntag & TAG_R:
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jumps.append((j, j-size, 0, 'y'))
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else:
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jumps.append((j, j-size, 0, 'r'))
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else:
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jumps.append((j, j-size, 0, 'b'))
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# figure out x-offsets to avoid collisions between jumps
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for j in range(len(jumps)):
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a, b, _, c = jumps[j]
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x = 0
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while any(
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max(a, b) >= min(a_, b_)
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and max(a_, b_) >= min(a, b)
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and x == x_
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for a_, b_, x_, _ in jumps[:j]):
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x += 1
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jumps[j] = a, b, x, c
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def jumprepr(j):
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# render jumps
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chars = {}
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for a, b, x, c in jumps:
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c_start = (
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'\x1b[33m' if color and c == 'y'
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else '\x1b[31m' if color and c == 'r'
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else '\x1b[90m' if color
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else '')
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c_stop = '\x1b[m' if color else ''
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if j == a:
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for x_ in range(2*x+1):
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chars[x_] = '%s-%s' % (c_start, c_stop)
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chars[2*x+1] = '%s\'%s' % (c_start, c_stop)
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elif j == b:
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for x_ in range(2*x+1):
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chars[x_] = '%s-%s' % (c_start, c_stop)
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chars[2*x+1] = '%s.%s' % (c_start, c_stop)
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chars[0] = '%s<%s' % (c_start, c_stop)
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elif j >= min(a, b) and j <= max(a, b):
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chars[2*x+1] = '%s|%s' % (c_start, c_stop)
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return ''.join(chars.get(x, ' ')
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for x in range(max(chars.keys(), default=0)+1))
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# preprocess lifetimes
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lifetime_width = 0
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if args.get('lifetimes'):
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class Lifetime:
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color_i = 0
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def __init__(self, j):
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self.origin = j
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self.tags = set()
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self.color = COLORS[self.__class__.color_i]
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self.__class__.color_i = (
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self.__class__.color_i + 1) % len(COLORS)
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def add(self, j):
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self.tags.add(j)
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def __bool__(self):
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return bool(self.tags)
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# first figure out where each rid comes from
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weights = []
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lifetimes = []
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def index(weights, rid):
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for i, w in enumerate(weights):
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if rid < w:
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return i, rid
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rid -= w
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return len(weights), 0
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checkpoint_js = [0]
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checkpoints = [([], [], set(), set(), set())]
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def checkpoint(j, weights, lifetimes, grows, shrinks, tags):
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checkpoint_js.append(j)
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checkpoints.append((
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weights.copy(), lifetimes.copy(),
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grows, shrinks, tags))
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lower_, upper_ = 0, 0
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weight_ = 0
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wastrunk = False
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j_ = 4
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while j_ < (block_size if args.get('all') else eoff):
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j = j_
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v, tag, w, size, d = fromtag(data[j_:])
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j_ += d
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if not tag & TAG_ALT:
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j_ += size
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# evaluate trunks
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if (tag & 0xf000) != TAG_CKSUM:
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if not wastrunk:
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wastrunk = True
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lower_, upper_ = 0, 0
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if (tag & 0xf000) == TAG_ALT:
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lower_ += w
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else:
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upper_ += w
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if not tag & TAG_ALT:
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wastrunk = False
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# derive the current tag's rid from alt weights
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delta = (lower_+upper_) - weight_
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weight_ = lower_+upper_
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rid = lower_ + w-1
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if (tag & 0xf000) != TAG_CKSUM and not tag & TAG_ALT:
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# note we ignore out-of-bounds here for debugging
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if delta > 0:
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# grow lifetimes
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i, rid_ = index(weights, lower_)
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if rid_ > 0:
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weights[i:i+1] = [rid_, delta, weights[i]-rid_]
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lifetimes[i:i+1] = [
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lifetimes[i], Lifetime(j), lifetimes[i]]
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else:
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weights[i:i] = [delta]
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lifetimes[i:i] = [Lifetime(j)]
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checkpoint(j, weights, lifetimes, {i}, set(), {i})
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elif delta < 0:
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# shrink lifetimes
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i, rid_ = index(weights, lower_)
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delta_ = -delta
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weights_ = weights.copy()
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lifetimes_ = lifetimes.copy()
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shrinks = set()
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while delta_ > 0 and i < len(weights_):
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if weights_[i] > delta_:
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delta__ = min(delta_, weights_[i]-rid_)
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delta_ -= delta__
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weights_[i] -= delta__
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i += 1
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rid_ = 0
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else:
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delta_ -= weights_[i]
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weights_[i:i+1] = []
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lifetimes_[i:i+1] = []
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shrinks.add(i + len(shrinks))
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checkpoint(j, weights, lifetimes, set(), shrinks, {i})
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weights = weights_
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lifetimes = lifetimes_
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if rid >= 0:
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# attach tag to lifetime
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i, rid_ = index(weights, rid)
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if i < len(weights):
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lifetimes[i].add(j)
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if delta == 0:
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checkpoint(j, weights, lifetimes, set(), set(), {i})
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lifetime_width = 2*max((
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sum(1 for lifetime in lifetimes if lifetime)
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for _, lifetimes, _, _, _ in checkpoints),
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default=0)
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|
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def lifetimerepr(j):
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x = bisect.bisect(checkpoint_js, j)-1
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j_ = checkpoint_js[x]
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weights, lifetimes, grows, shrinks, tags = checkpoints[x]
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reprs = []
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colors = []
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was = None
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for i, (w, lifetime) in enumerate(zip(weights, lifetimes)):
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# skip lifetimes with no tags and shrinks
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if not lifetime or (j != j_ and i in shrinks):
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if i in grows or i in shrinks or i in tags:
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tags = tags.copy()
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tags.add(i+1)
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continue
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if j == j_ and i in grows:
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reprs.append('.')
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was = 'grow'
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elif j == j_ and i in shrinks:
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reprs.append('\'')
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was = 'shrink'
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elif j == j_ and i in tags:
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reprs.append('* ')
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elif was == 'grow':
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reprs.append('\\ ')
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elif was == 'shrink':
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reprs.append('/ ')
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else:
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reprs.append('| ')
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colors.append(lifetime.color)
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return '%s%*s' % (
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''.join('%s%s%s' % (
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'\x1b[%sm' % c if color else '',
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r,
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'\x1b[m' if color else '')
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for r, c in zip(reprs, colors)),
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lifetime_width - sum(len(r) for r in reprs), '')
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# dynamically size the id field
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#
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# we need to do an additional pass to find this since our rbyd weight
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# does not include any shrub trees
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weight_ = 0
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weight__ = 0
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wastrunk = False
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j_ = 4
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while j_ < (block_size if args.get('all') else eoff):
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j = j_
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v, tag, w, size, d = fromtag(data[j_:])
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j_ += d
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|
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if not tag & TAG_ALT:
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j_ += size
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|
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# evaluate trunks
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if (tag & 0xf000) != TAG_CKSUM:
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|
if not wastrunk:
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wastrunk = True
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weight__ = 0
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|
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weight__ += w
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|
|
if not tag & TAG_ALT:
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wastrunk = False
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# found new weight?
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weight_ = max(weight_, weight__)
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|
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w_width = m.ceil(m.log10(max(1, weight_)+1))
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|
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# print revision count
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|
if args.get('raw'):
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print('%8s: %*s%*s %s' % (
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'%04x' % 0,
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|
lifetime_width, '',
|
|
2*w_width+1, '',
|
|
next(xxd(data[0:4]))))
|
|
|
|
# print tags
|
|
lower_, upper_ = 0, 0
|
|
wastrunk = False
|
|
j_ = 4
|
|
while j_ < (block_size if args.get('all') else eoff):
|
|
notes = []
|
|
|
|
j = j_
|
|
v, tag, w, size, d = fromtag(data[j_:])
|
|
if v != (popc(cksum) & 1):
|
|
notes.append('v!=%x' % (popc(cksum) & 1))
|
|
cksum = crc32c(data[j_:j_+d], cksum)
|
|
j_ += d
|
|
|
|
# take care of cksums
|
|
if not tag & TAG_ALT:
|
|
if (tag & 0xff00) != TAG_CKSUM:
|
|
cksum = crc32c(data[j_:j_+size], cksum)
|
|
# found a cksum?
|
|
else:
|
|
cksum_ = fromle32(data[j_:j_+4])
|
|
if cksum != cksum_:
|
|
notes.append('cksum!=%08x' % cksum)
|
|
j_ += size
|
|
|
|
# evaluate trunks
|
|
if (tag & 0xf000) != TAG_CKSUM:
|
|
if not wastrunk:
|
|
wastrunk = True
|
|
lower_, upper_ = 0, 0
|
|
|
|
if (tag & 0xe000) == TAG_ALT:
|
|
lower_ += w
|
|
else:
|
|
upper_ += w
|
|
|
|
if not tag & TAG_ALT:
|
|
wastrunk = False
|
|
# derive the current tag's rid from alt weights
|
|
rid = lower_ + w-1
|
|
|
|
# show human-readable tag representation
|
|
print('%s%08x:%s %*s%s%*s %-*s%s%s' % (
|
|
'\x1b[90m' if color and j >= eoff else '',
|
|
j,
|
|
'\x1b[m' if color and j >= eoff else '',
|
|
lifetime_width, lifetimerepr(j) if args.get('lifetimes') else '',
|
|
'\x1b[90m' if color and j >= eoff else '',
|
|
2*w_width+1, '' if (tag & 0xe000) != 0x0000
|
|
else '%d-%d' % (rid-(w-1), rid) if w > 1
|
|
else rid,
|
|
56+w_width, '%-*s%s' % (
|
|
21+w_width, tagrepr(tag, w, size, j),
|
|
' %s' % next(xxd(
|
|
data[j+d:j+d+min(size, 8)], 8), '')
|
|
if not args.get('raw') and not args.get('no_truncate')
|
|
and not tag & TAG_ALT else ''),
|
|
'\x1b[m' if color and j >= eoff else '',
|
|
' (%s)' % ', '.join(notes) if notes
|
|
else ' %s' % jumprepr(j)
|
|
if args.get('jumps')
|
|
else ''))
|
|
|
|
# show in-device representation, including some extra
|
|
# cksum/parity info
|
|
if args.get('device'):
|
|
print('%s%8s %*s%*s %-*s %08x %x%s' % (
|
|
'\x1b[90m' if color and j >= eoff else '',
|
|
'',
|
|
lifetime_width, '',
|
|
2*w_width+1, '',
|
|
21+w_width, '%04x %08x %07x' % (tag, w, size),
|
|
cksum,
|
|
popc(cksum) & 1,
|
|
'\x1b[m' if color and j >= eoff else ''))
|
|
|
|
# show on-disk encoding of tags
|
|
if args.get('raw'):
|
|
for o, line in enumerate(xxd(data[j:j+d])):
|
|
print('%s%8s: %*s%*s %s%s' % (
|
|
'\x1b[90m' if color and j >= eoff else '',
|
|
'%04x' % (j + o*16),
|
|
lifetime_width, '',
|
|
2*w_width+1, '',
|
|
line,
|
|
'\x1b[m' if color and j >= eoff else ''))
|
|
if args.get('raw') or args.get('no_truncate'):
|
|
if not tag & TAG_ALT:
|
|
for o, line in enumerate(xxd(data[j+d:j+d+size])):
|
|
print('%s%8s: %*s%*s %s%s' % (
|
|
'\x1b[90m' if color and j >= eoff else '',
|
|
'%04x' % (j+d + o*16),
|
|
lifetime_width, '',
|
|
2*w_width+1, '',
|
|
line,
|
|
'\x1b[m' if color and j >= eoff else ''))
|
|
|
|
|
|
def dbg_tree(data, block_size, rev, trunk, weight, *,
|
|
color=False,
|
|
**args):
|
|
if not trunk:
|
|
return
|
|
|
|
# lookup a tag, returning also the search path for decoration
|
|
# purposes
|
|
def lookup(rid, tag):
|
|
lower = 0
|
|
upper = weight
|
|
path = []
|
|
|
|
# descend down tree
|
|
j = trunk
|
|
while True:
|
|
_, alt, w, jump, d = fromtag(data[j:])
|
|
|
|
# found an alt?
|
|
if alt & TAG_ALT:
|
|
# follow?
|
|
if ((rid, tag & 0xfff) > (upper-w-1, alt & 0xfff)
|
|
if alt & TAG_GT
|
|
else ((rid, tag & 0xfff) <= (lower+w-1, alt & 0xfff))):
|
|
lower += upper-lower-w if alt & TAG_GT else 0
|
|
upper -= upper-lower-w if not alt & TAG_GT else 0
|
|
j = j - jump
|
|
|
|
# figure out which color
|
|
if alt & TAG_R:
|
|
_, nalt, _, _, _ = fromtag(data[j+jump+d:])
|
|
if nalt & TAG_R:
|
|
path.append((j+jump, j, True, 'y'))
|
|
else:
|
|
path.append((j+jump, j, True, 'r'))
|
|
else:
|
|
path.append((j+jump, j, True, 'b'))
|
|
|
|
# stay on path
|
|
else:
|
|
lower += w if not alt & TAG_GT else 0
|
|
upper -= w if alt & TAG_GT else 0
|
|
j = j + d
|
|
|
|
# figure out which color
|
|
if alt & TAG_R:
|
|
_, nalt, _, _, _ = fromtag(data[j:])
|
|
if nalt & TAG_R:
|
|
path.append((j-d, j, False, 'y'))
|
|
else:
|
|
path.append((j-d, j, False, 'r'))
|
|
else:
|
|
path.append((j-d, j, False, 'b'))
|
|
|
|
# found tag
|
|
else:
|
|
rid_ = upper-1
|
|
tag_ = alt
|
|
w_ = upper-lower
|
|
|
|
done = not tag_ or (rid_, tag_) < (rid, tag)
|
|
|
|
return done, rid_, tag_, w_, j, d, jump, path
|
|
|
|
# precompute tree
|
|
t_width = 0
|
|
if args.get('tree'):
|
|
trunks = co.defaultdict(lambda: (-1, 0))
|
|
alts = co.defaultdict(lambda: {})
|
|
|
|
rid, tag = -1, 0
|
|
while True:
|
|
done, rid, tag, w, j, d, size, path = lookup(rid, tag+0x1)
|
|
# found end of tree?
|
|
if done:
|
|
break
|
|
|
|
# keep track of trunks/alts
|
|
trunks[j] = (rid, tag)
|
|
|
|
for j_, j__, followed, c in path:
|
|
if followed:
|
|
alts[j_] |= {'f': j__, 'c': c}
|
|
else:
|
|
alts[j_] |= {'nf': j__, 'c': c}
|
|
|
|
# prune any alts with unreachable edges
|
|
pruned = {}
|
|
for j_, alt in alts.items():
|
|
if 'f' not in alt:
|
|
pruned[j_] = alt['nf']
|
|
elif 'nf' not in alt:
|
|
pruned[j_] = alt['f']
|
|
for j_ in pruned.keys():
|
|
del alts[j_]
|
|
|
|
for j_, alt in alts.items():
|
|
while alt['f'] in pruned:
|
|
alt['f'] = pruned[alt['f']]
|
|
while alt['nf'] in pruned:
|
|
alt['nf'] = pruned[alt['nf']]
|
|
|
|
# find the trunk and depth of each alt, assuming pruned alts
|
|
# didn't exist
|
|
def rec_trunk(j_):
|
|
if j_ not in alts:
|
|
return trunks[j_]
|
|
else:
|
|
if 'nft' not in alts[j_]:
|
|
alts[j_]['nft'] = rec_trunk(alts[j_]['nf'])
|
|
return alts[j_]['nft']
|
|
|
|
for j_ in alts.keys():
|
|
rec_trunk(j_)
|
|
for j_, alt in alts.items():
|
|
if alt['f'] in alts:
|
|
alt['ft'] = alts[alt['f']]['nft']
|
|
else:
|
|
alt['ft'] = trunks[alt['f']]
|
|
|
|
def rec_height(j_):
|
|
if j_ not in alts:
|
|
return 0
|
|
else:
|
|
if 'h' not in alts[j_]:
|
|
alts[j_]['h'] = max(
|
|
rec_height(alts[j_]['f']),
|
|
rec_height(alts[j_]['nf'])) + 1
|
|
return alts[j_]['h']
|
|
|
|
for j_ in alts.keys():
|
|
rec_height(j_)
|
|
|
|
t_depth = max((alt['h']+1 for alt in alts.values()), default=0)
|
|
|
|
# convert to more general tree representation
|
|
TBranch = co.namedtuple('TBranch', 'a, b, d, c')
|
|
tree = set()
|
|
for j, alt in alts.items():
|
|
# note all non-trunk edges should be black
|
|
tree.add(TBranch(
|
|
a=alt['nft'],
|
|
b=alt['nft'],
|
|
d=t_depth-1 - alt['h'],
|
|
c=alt['c'],
|
|
))
|
|
tree.add(TBranch(
|
|
a=alt['nft'],
|
|
b=alt['ft'],
|
|
d=t_depth-1 - alt['h'],
|
|
c='b',
|
|
))
|
|
|
|
# find the max depth from the tree
|
|
t_depth = max((branch.d+1 for branch in tree), default=0)
|
|
if t_depth > 0:
|
|
t_width = 2*t_depth + 2
|
|
|
|
def treerepr(rid, tag):
|
|
if t_depth == 0:
|
|
return ''
|
|
|
|
def branchrepr(x, d, was):
|
|
for branch in tree:
|
|
if branch.d == d and branch.b == x:
|
|
if any(branch.d == d and branch.a == x
|
|
for branch in tree):
|
|
return '+-', branch.c, branch.c
|
|
elif any(branch.d == d
|
|
and x > min(branch.a, branch.b)
|
|
and x < max(branch.a, branch.b)
|
|
for branch in tree):
|
|
return '|-', branch.c, branch.c
|
|
elif branch.a < branch.b:
|
|
return '\'-', branch.c, branch.c
|
|
else:
|
|
return '.-', branch.c, branch.c
|
|
for branch in tree:
|
|
if branch.d == d and branch.a == x:
|
|
return '+ ', branch.c, None
|
|
for branch in tree:
|
|
if (branch.d == d
|
|
and x > min(branch.a, branch.b)
|
|
and x < max(branch.a, branch.b)):
|
|
return '| ', branch.c, was
|
|
if was:
|
|
return '--', was, was
|
|
return ' ', None, None
|
|
|
|
trunk = []
|
|
was = None
|
|
for d in range(t_depth):
|
|
t, c, was = branchrepr((rid, tag), d, was)
|
|
|
|
trunk.append('%s%s%s%s' % (
|
|
'\x1b[33m' if color and c == 'y'
|
|
else '\x1b[31m' if color and c == 'r'
|
|
else '\x1b[90m' if color and c == 'b'
|
|
else '',
|
|
t,
|
|
('>' if was else ' ') if d == t_depth-1 else '',
|
|
'\x1b[m' if color and c else ''))
|
|
|
|
return '%s ' % ''.join(trunk)
|
|
|
|
|
|
# dynamically size the id field
|
|
w_width = m.ceil(m.log10(max(1, weight)+1))
|
|
|
|
rid, tag = -1, 0
|
|
for i in it.count():
|
|
done, rid, tag, w, j, d, size, path = lookup(rid, tag+0x1)
|
|
# found end of tree?
|
|
if done:
|
|
break
|
|
|
|
# show human-readable tag representation
|
|
print('%08x: %s%s' % (
|
|
j,
|
|
treerepr(rid, tag) if args.get('tree') else '',
|
|
'%*s %-*s%s' % (
|
|
2*w_width+1, '%d-%d' % (rid-(w-1), rid)
|
|
if w > 1 else rid
|
|
if w > 0 or i == 0 else '',
|
|
21+w_width, tagrepr(tag, w, size, j),
|
|
' %s' % next(xxd(
|
|
data[j+d:j+d+min(size, 8)], 8), '')
|
|
if not args.get('raw') and not args.get('no_truncate')
|
|
and not tag & TAG_ALT else '')))
|
|
|
|
# show in-device representation
|
|
if args.get('device'):
|
|
print('%8s %*s%*s %04x %08x %07x' % (
|
|
'',
|
|
t_width, '',
|
|
2*w_width+1, '',
|
|
tag, w, size))
|
|
|
|
# show on-disk encoding of tags
|
|
if args.get('raw'):
|
|
for o, line in enumerate(xxd(data[j:j+d])):
|
|
print('%8s: %*s%*s %s' % (
|
|
'%04x' % (j + o*16),
|
|
t_width, '',
|
|
2*w_width+1, '',
|
|
line))
|
|
if args.get('raw') or args.get('no_truncate'):
|
|
if not tag & TAG_ALT:
|
|
for o, line in enumerate(xxd(data[j+d:j+d+size])):
|
|
print('%8s: %*s%*s %s' % (
|
|
'%04x' % (j+d + o*16),
|
|
t_width, '',
|
|
2*w_width+1, '',
|
|
line))
|
|
|
|
|
|
def main(disk, blocks=None, *,
|
|
block_size=None,
|
|
trunk=None,
|
|
color='auto',
|
|
**args):
|
|
# figure out what color should be
|
|
if color == 'auto':
|
|
color = sys.stdout.isatty()
|
|
elif color == 'always':
|
|
color = True
|
|
else:
|
|
color = False
|
|
|
|
# flatten blocks, default to block 0
|
|
if not blocks:
|
|
blocks = [[0]]
|
|
blocks = [block for blocks_ in blocks for block in blocks_]
|
|
|
|
with open(disk, 'rb') as f:
|
|
# if block_size is omitted, assume the block device is one big block
|
|
if block_size is None:
|
|
f.seek(0, os.SEEK_END)
|
|
block_size = f.tell()
|
|
|
|
# blocks may also encode trunks
|
|
blocks, trunks = (
|
|
[block[0] if isinstance(block, tuple) else block
|
|
for block in blocks],
|
|
[trunk if trunk is not None
|
|
else block[1] if isinstance(block, tuple)
|
|
else None
|
|
for block in blocks])
|
|
|
|
# read each block
|
|
datas = []
|
|
for block in blocks:
|
|
f.seek(block * block_size)
|
|
datas.append(f.read(block_size))
|
|
|
|
# first figure out which block as the most recent revision
|
|
def fetch(data, trunk):
|
|
rev = fromle32(data[0:4])
|
|
cksum = 0
|
|
cksum_ = crc32c(data[0:4])
|
|
eoff = 0
|
|
j_ = 4
|
|
trunk_ = 0
|
|
trunk__ = 0
|
|
trunk___ = 0
|
|
weight = 0
|
|
weight_ = 0
|
|
weight__ = 0
|
|
wastrunk = False
|
|
trunkeoff = None
|
|
while j_ < len(data) and (not trunk or eoff <= trunk):
|
|
v, tag, w, size, d = fromtag(data[j_:])
|
|
if v != (popc(cksum_) & 1):
|
|
break
|
|
cksum_ = crc32c(data[j_:j_+d], cksum_)
|
|
j_ += d
|
|
if not tag & TAG_ALT and j_ + size > len(data):
|
|
break
|
|
|
|
# take care of cksums
|
|
if not tag & TAG_ALT:
|
|
if (tag & 0xff00) != TAG_CKSUM:
|
|
cksum_ = crc32c(data[j_:j_+size], cksum_)
|
|
# found a cksum?
|
|
else:
|
|
cksum__ = fromle32(data[j_:j_+4])
|
|
if cksum_ != cksum__:
|
|
break
|
|
# commit what we have
|
|
eoff = trunkeoff if trunkeoff else j_ + size
|
|
cksum = cksum_
|
|
trunk_ = trunk__
|
|
weight = weight_
|
|
|
|
# evaluate trunks
|
|
if (tag & 0xf000) != TAG_CKSUM and (
|
|
not trunk or trunk >= j_-d or wastrunk):
|
|
# new trunk?
|
|
if not wastrunk:
|
|
wastrunk = True
|
|
trunk___ = j_-d
|
|
weight__ = 0
|
|
|
|
# keep track of weight
|
|
weight__ += w
|
|
|
|
# end of trunk?
|
|
if not tag & TAG_ALT:
|
|
wastrunk = False
|
|
# update trunk/weight unless we found a shrub or an
|
|
# explicit trunk (which may be a shrub) is requested
|
|
if not tag & TAG_SHRUB or trunk:
|
|
trunk__ = trunk___
|
|
weight_ = weight__
|
|
# keep track of eoff for best matching trunk
|
|
if trunk and j_ + size > trunk:
|
|
trunkeoff = j_ + size
|
|
|
|
if not tag & TAG_ALT:
|
|
j_ += size
|
|
|
|
return rev, eoff, trunk_, weight
|
|
|
|
revs, eoffs, trunks_, weights = [], [], [], []
|
|
i = 0
|
|
for i_, (data, trunk_) in enumerate(zip(datas, trunks)):
|
|
rev, eoff, trunk_, weight = fetch(data, trunk_)
|
|
revs.append(rev)
|
|
eoffs.append(eoff)
|
|
trunks_.append(trunk_)
|
|
weights.append(weight)
|
|
|
|
# compare with sequence arithmetic
|
|
if trunk_ and (
|
|
not trunks_[i]
|
|
or not ((rev - revs[i]) & 0x80000000)
|
|
or (rev == revs[i] and trunk_ > trunks_[i])):
|
|
i = i_
|
|
|
|
# print contents of the winning metadata block
|
|
block, data, rev, eoff, trunk_, weight = (
|
|
blocks[i], datas[i], revs[i], eoffs[i], trunks_[i], weights[i])
|
|
|
|
print('rbyd %s, rev %d, size %d, weight %d' % (
|
|
'0x%x.%x' % (block, trunk_)
|
|
if len(blocks) == 1
|
|
else '0x{%x,%s}.%x' % (
|
|
block,
|
|
','.join('%x' % blocks[(i+1+j) % len(blocks)]
|
|
for j in range(len(blocks)-1)),
|
|
trunk_),
|
|
rev, eoff, weight))
|
|
|
|
if args.get('log'):
|
|
dbg_log(data, block_size, rev, eoff, weight,
|
|
color=color,
|
|
**args)
|
|
else:
|
|
dbg_tree(data, block_size, rev, trunk_, weight,
|
|
color=color,
|
|
**args)
|
|
|
|
if args.get('error_on_corrupt') and eoff == 0:
|
|
sys.exit(2)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
import argparse
|
|
import sys
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parser = argparse.ArgumentParser(
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description="Debug rbyd metadata.",
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allow_abbrev=False)
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parser.add_argument(
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'disk',
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help="File containing the block device.")
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parser.add_argument(
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'blocks',
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nargs='*',
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type=rbydaddr,
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help="Block address of metadata blocks.")
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parser.add_argument(
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'-B', '--block-size',
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type=lambda x: int(x, 0),
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help="Block size in bytes.")
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parser.add_argument(
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'--trunk',
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type=lambda x: int(x, 0),
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help="Use this offset as the trunk of the tree.")
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parser.add_argument(
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'--color',
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choices=['never', 'always', 'auto'],
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default='auto',
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help="When to use terminal colors. Defaults to 'auto'.")
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parser.add_argument(
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'-a', '--all',
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action='store_true',
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help="Don't stop parsing on bad commits.")
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parser.add_argument(
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'-l', '--log',
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action='store_true',
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help="Show the raw tags as they appear in the log.")
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parser.add_argument(
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'-r', '--raw',
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action='store_true',
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help="Show the raw data including tag encodings.")
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parser.add_argument(
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'-x', '--device',
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action='store_true',
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help="Show the device-side representation of tags.")
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parser.add_argument(
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'-T', '--no-truncate',
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action='store_true',
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help="Don't truncate, show the full contents.")
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parser.add_argument(
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'-t', '--tree',
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action='store_true',
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help="Show the rbyd tree.")
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parser.add_argument(
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'-j', '--jumps',
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action='store_true',
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help="Show alt pointer jumps in the margin.")
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parser.add_argument(
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'-g', '--lifetimes',
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action='store_true',
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help="Show inserts/deletes of ids in the margin.")
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parser.add_argument(
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'-e', '--error-on-corrupt',
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action='store_true',
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help="Error if no valid commit is found.")
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sys.exit(main(**{k: v
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for k, v in vars(parser.parse_intermixed_args()).items()
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if v is not None}))
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