forked from Imagelibrary/littlefs
b67fcb0ee5
This builds on dbgrbyd.py and dbgbtree.py by allowing for quick
debugging of the littlefs mtree, which is a btree of rbyd pairs with a
few bells and whistles.
This also comes with a number of tweaks to dbgrbyd.py and dbgbtree.py,
mostly changing rbyd addresses to support some more mdir friendly
formats.
The syntax for rbyd addresses is starting to converge into a couple
common patterns, which is nice for quickly determining what type of
address you are looking at at a glance:
- 0x12 => An rbyd at block 0x12
- 0x12.34 => An rbyd at block 0x12 with trunk 0x34
- 0x{12,34} => An rbyd at either block 0x12 or block 0x34 (an mdir)
- 0x{12,34}.56 => An rbyd at either block 0x12 or block 0x34 with trunk 0x56
These scripts have also been updated to support any number of blocks in
an rbyd address, for example 0x{12,34,56,78}. This is a bit of future
proofing. >2 blocks in mdirs may be explored in the future for the
increased redundancy.
822 lines
28 KiB
Python
Executable File
822 lines
28 KiB
Python
Executable File
#!/usr/bin/env python3
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import bisect
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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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TAG_UNR = 0x0002
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TAG_MAGIC = 0x0030
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TAG_CONFIG = 0x0040
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TAG_MROOT = 0x0110
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TAG_NAME = 0x1000
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TAG_BRANCH = 0x1000
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TAG_REG = 0x1010
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TAG_DIR = 0x1020
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TAG_STRUCT = 0x3000
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TAG_INLINED = 0x3000
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TAG_BLOCK = 0x3100
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TAG_MDIR = 0x3200
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TAG_BTREE = 0x3300
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TAG_UATTR = 0x4000
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TAG_ALT = 0x0008
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TAG_CRC = 0x0004
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TAG_FCRC = 0x1004
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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 fromle16(data):
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return struct.unpack('<H', data[0:2].ljust(2, b'\0'))[0]
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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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tag = fromle16(data)
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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&1, tag&~1, weight, size, 2+d+d_
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def frommdir(data):
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blocks = []
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d = 0
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while d < len(data):
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block, d_ = fromleb128(data[d:])
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blocks.append(block)
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d += d_
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return blocks
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def frombtree(data):
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w, d1 = fromleb128(data)
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trunk, d2 = fromleb128(data[d1:])
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block, d3 = fromleb128(data[d1+d2:])
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crc = fromle32(data[d1+d2+d3:])
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return w, trunk, block, crc
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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, crc=False):
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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 & 0xfffe) == TAG_UNR:
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return 'unr%s%s' % (
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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 & 0xfffc) == TAG_MAGIC:
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return '%smagic%s %d' % (
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'rm' if tag & 0x2 else '',
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' w%d' % w if w else '',
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size)
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elif (tag & 0xfffc) == TAG_CONFIG:
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return '%sconfig%s %d' % (
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'rm' if tag & 0x2 else '',
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' w%d' % w if w else '',
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size)
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elif (tag & 0xfffc) == TAG_MROOT:
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return '%smroot%s %d' % (
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'rm' if tag & 0x2 else '',
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' w%d' % w if w else '',
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size)
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elif (tag & 0xf00c) == TAG_NAME:
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return '%s%s%s %d' % (
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'rm' if tag & 0x2 else '',
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'bname' if (tag & 0xfffe) == TAG_BRANCH
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else 'reg' if (tag & 0xfffe) == TAG_REG
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else 'dir' if (tag & 0xfffe) == TAG_DIR
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else 'name 0x%02x' % ((tag & 0x0ff0) >> 4),
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' w%d' % w if w else '',
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size)
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elif (tag & 0xf00c) == TAG_STRUCT:
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return '%s%s%s %d' % (
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'rm' if tag & 0x2 else '',
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'inlined' if (tag & 0xfffe) == TAG_INLINED
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else 'block' if (tag & 0xfffe) == TAG_BLOCK
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else 'mdir' if (tag & 0xfffe) == TAG_MDIR
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else 'btree' if (tag & 0xfffe) == TAG_BTREE
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else 'struct 0x%02x' % ((tag & 0x0ff0) >> 4),
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' w%d' % w if w else '',
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size)
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elif (tag & 0xf00c) == TAG_UATTR:
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return '%suattr 0x%02x%s%s' % (
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'rm' if tag & 0x2 else '',
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(tag & 0x0ff0) >> 4,
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' w%d' % w if w else '',
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' %d' % size if not tag & 0x2 or size else '')
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elif (tag & 0xf00e) == TAG_CRC:
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return 'crc%x%s %d' % (
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1 if tag & 0x10 else 0,
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' 0x%x' % w if w > 0 else '',
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size)
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elif (tag & 0xfffe) == TAG_FCRC:
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return 'fcrc%s %d' % (
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' 0x%x' % w if w > 0 else '',
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size)
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elif tag & 0x8:
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return 'alt%s%s 0x%x w%d %s' % (
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'r' if tag & 0x2 else 'b',
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'gt' if tag & 0x4 else 'le',
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tag & 0xfff0,
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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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class Rbyd:
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def __init__(self, block, data, rev, off, trunk, weight):
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self.block = block
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self.data = data
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self.rev = rev
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self.off = off
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self.trunk = trunk
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self.weight = weight
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self.other_blocks = []
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def addr(self):
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if not self.other_blocks:
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return '0x%x.%x' % (self.block, self.trunk)
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else:
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return '0x{%x,%s}.%x' % (
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self.block,
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','.join('%x' % block for block in self.other_blocks),
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self.trunk)
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@classmethod
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def fetch(cls, f, block_size, blocks, trunk=None):
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if isinstance(blocks, int):
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blocks = [blocks]
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if len(blocks) > 1:
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# fetch all blocks
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rbyds = [cls.fetch(f, block_size, block, trunk) for block in blocks]
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# determine most recent revision
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i = 0
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for i_, rbyd in enumerate(rbyds):
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# compare with sequence arithmetic
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if rbyd and (
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not ((rbyd.rev - rbyds[i].rev) & 0x80000000)
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or (rbyd.rev == rbyds[i].rev
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and rbyd.trunk > rbyds[i].trunk)):
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i = i_
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# keep track of the other blocks
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rbyd = rbyds[i]
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rbyd.other_blocks = [rbyds[(i+1+j) % len(rbyds)].block
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for j in range(len(rbyds)-1)]
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return rbyd
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else:
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# block may encode a trunk
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block = blocks[0]
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if isinstance(block, tuple):
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if trunk is None:
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trunk = block[1]
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block = block[0]
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# seek to the block
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f.seek(block * block_size)
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data = f.read(block_size)
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# fetch the rbyd
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rev = fromle32(data[0:4])
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crc = 0
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crc_ = crc32c(data[0:4])
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off = 0
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j_ = 4
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trunk_ = 0
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trunk__ = 0
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weight = 0
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lower_, upper_ = 0, 0
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weight_ = 0
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wastrunk = False
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trunkoff = None
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while j_ < len(data) and (not trunk or off <= trunk):
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v, tag, w, size, d = fromtag(data[j_:])
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if v != (popc(crc_) & 1):
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break
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crc_ = crc32c(data[j_:j_+d], crc_)
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j_ += d
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if not tag & 0x8 and j_ + size > len(data):
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break
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# take care of crcs
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if not tag & 0x8:
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if (tag & 0xf00f) != TAG_CRC:
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crc_ = crc32c(data[j_:j_+size], crc_)
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# found a crc?
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else:
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crc__ = fromle32(data[j_:j_+4])
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if crc_ != crc__:
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break
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# commit what we have
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off = trunkoff if trunkoff else j_ + size
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crc = crc_
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trunk_ = trunk__
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weight = weight_
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# evaluate trunks
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if (tag & 0xc) != 0x4 and (
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not trunk or trunk >= j_-d or wastrunk):
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# new trunk?
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if not wastrunk:
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trunk__ = j_-d
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lower_, upper_ = 0, 0
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wastrunk = True
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# keep track of weight
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if tag & 0x8:
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if tag & 0x4:
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upper_ += w
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else:
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lower_ += w
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else:
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weight_ = lower_+upper_+w
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wastrunk = False
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# keep track of off for best matching trunk
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if trunk and j_ + size > trunk:
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trunkoff = j_ + size
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if not tag & 0x8:
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j_ += size
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return cls(block, data, rev, off, trunk_, weight)
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def lookup(self, id, tag):
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if not self:
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return True, 0, -1, 0, 0, 0, b''
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lower = -1
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upper = self.weight
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# descend down tree
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j = self.trunk
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while True:
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_, alt, weight_, jump, d = fromtag(self.data[j:])
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# found an alt?
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if alt & 0x8:
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# follow?
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if ((id, tag & ~0xf) > (upper-weight_-1, alt & ~0xf)
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if alt & 0x4
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else ((id, tag & ~0xf) <= (lower+weight_, alt & ~0xf))):
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lower += upper-lower-1-weight_ if alt & 0x4 else 0
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upper -= upper-lower-1-weight_ if not alt & 0x4 else 0
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j = j - jump
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# stay on path
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else:
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lower += weight_ if not alt & 0x4 else 0
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upper -= weight_ if alt & 0x4 else 0
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j = j + d
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# found tag
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else:
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id_ = upper-1
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tag_ = alt
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w_ = id_-lower
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done = (id_, tag_) < (id, tag) or tag_ & 2
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return (done, id_, tag_, w_,
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j, d, self.data[j+d:j+d+jump])
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def __bool__(self):
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return bool(self.trunk)
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def __eq__(self, other):
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return self.block == other.block and self.trunk == other.trunk
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def __ne__(self, other):
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return not self.__eq__(other)
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def __iter__(self):
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tag = 0
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id = -1
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while True:
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done, id, tag, w, j, d, data = self.lookup(id, tag+0x10)
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if done:
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break
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yield id, tag, w, j, d, data
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def main(disk, mroots=None, *,
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block_size=None,
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color='auto',
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**args):
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# figure out what color should be
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if color == 'auto':
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color = sys.stdout.isatty()
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elif color == 'always':
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color = True
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else:
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color = False
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# flatten mroots, default to 0x{0,1}
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if not mroots:
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mroots = [[0,1]]
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mroots = [block for mroots_ in mroots for block in mroots_]
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# we seek around a bunch, so just keep the disk open
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with open(disk, 'rb') as f:
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# if block_size is omitted, assume the block device is one big block
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if block_size is None:
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f.seek(0, os.SEEK_END)
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block_size = f.tell()
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# look up an id, while keeping track of the search path
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def btree_lookup(btree, id, depth=None):
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rbyd = btree
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rid = id
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depth_ = 1
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path = []
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# corrupted? return a corrupted block once
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if not rbyd:
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return (id > 0, id, 0, rbyd, -1,
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(0, 0, 0, b''),
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(0, 0, 0, b''),
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path)
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while True:
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# first lookup id/name
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(done, rid_, name_tag, w,
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name_j, name_d, name) = rbyd.lookup(rid, 0)
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if done:
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return (True, id, 0, rbyd, -1,
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(0, 0, 0, b''),
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(0, 0, 0, b''),
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path)
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if name_tag & 0xf00f == TAG_NAME:
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# then lookup struct
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(done, _, struct_tag, _,
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struct_j, struct_d, struct_) = rbyd.lookup(
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rid_, TAG_STRUCT)
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if done:
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return (True, id, 0, rbyd, -1,
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(0, 0, 0, b''),
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(0, 0, 0, b''),
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path)
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else:
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tag = name_tag
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struct_tag, struct_j, struct_d, struct_ = (
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name_tag, name_j, name_d, name)
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name_tag, name_j, name_d, name = 0, 0, 0, b''
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path.append((id + (rid_-rid), w, rbyd, rid_,
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(name_tag, name_j, name_d, name),
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(struct_tag, struct_j, struct_d, struct_)))
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|
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# is it another branch? continue down tree
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if struct_tag == TAG_BTREE and (
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not depth or depth_ < depth):
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w, trunk, block, crc = frombtree(struct_)
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rbyd = Rbyd.fetch(f, block_size, block, trunk)
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# corrupted? bail here so we can keep traversing the tree
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if not rbyd:
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return (False, id + (rid_-rid), w, rbyd, -1,
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(0, 0, 0, b''),
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(0, 0, 0, b''),
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path)
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rid -= (rid_-(w-1))
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depth_ += 1
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else:
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return (False, id + (rid_-rid), w, rbyd, rid_,
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(name_tag, name_j, name_d, name),
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(struct_tag, struct_j, struct_d, struct_),
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path)
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|
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# before we print, we need to do a pass for a few things:
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# - find the actual mroot
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# - find the total weight
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mweight = 0
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rweight = 0
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mroot = Rbyd.fetch(f, block_size, mroots)
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while True:
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rweight = max(rweight, mroot.weight)
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|
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# fetch the next mroot
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done, rid, tag, w, j, d, data = mroot.lookup(-1, TAG_MROOT)
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if not (not done and rid == -1 and tag == TAG_MROOT):
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break
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|
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blocks = frommdir(data)
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mroot = Rbyd.fetch(f, block_size, blocks)
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|
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# fetch the actual mtree, if there is one
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done, rid, tag, w, j, d, data = mroot.lookup(-1, TAG_BTREE)
|
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if not done and rid == -1 or tag == TAG_BTREE:
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w, trunk, block, crc = frombtree(data)
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mtree = Rbyd.fetch(f, block_size, block, trunk)
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mweight = w
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|
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# traverse entries
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mid = -1
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while True:
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(done, mid, w, rbyd, rid,
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(name_tag, name_j, name_d, name),
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(struct_tag, struct_j, struct_d, struct_),
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path) = (btree_lookup(mtree, mid+1,
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depth=args.get('depth')))
|
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if done:
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break
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|
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# corrupted?
|
|
if not rbyd:
|
|
continue
|
|
|
|
if struct_tag != TAG_MDIR:
|
|
continue
|
|
|
|
# fetch the mdir
|
|
blocks = frommdir(struct_)
|
|
mdir = Rbyd.fetch(f, block_size, blocks)
|
|
|
|
rweight = max(rweight, mroot.weight)
|
|
|
|
|
|
def dbg_mdir(mdir, mid):
|
|
for i, (id, tag, w, j, d, data) in enumerate(mdir):
|
|
# show human-readable tag representation
|
|
print('%12s %-57s' % (
|
|
'{%s}:' % ','.join('%04x' % block
|
|
for block in it.chain([mdir.block],
|
|
mdir.other_blocks))
|
|
if i == 0 else '',
|
|
'%*s %-22s%s' % (
|
|
w_width, '%d.%d-%d' % (mid, id-(w-1), id)
|
|
if w > 1 else '%d.%d' % (mid, id)
|
|
if w > 0 else '%d' % mid
|
|
if i == 0 else '',
|
|
tagrepr(tag, w, len(data), j),
|
|
' %s' % next(xxd(data, 8), '')
|
|
if not args.get('no_truncate') else '')))
|
|
|
|
# show in-device representation
|
|
if args.get('device'):
|
|
print('%11s %*s %s' % (
|
|
'',
|
|
w_width, '',
|
|
'%-22s%s' % (
|
|
'%04x %08x %07x' % (tag, w, len(data)),
|
|
' %s' % ' '.join(
|
|
'%08x' % fromle32(
|
|
mdir.data[j+d+i*4
|
|
: j+d+min(i*4+4,len(data))])
|
|
for i in range(
|
|
min(m.ceil(len(data)/4),
|
|
3)))[:23]
|
|
if not args.get('no_truncate')
|
|
and not tag & 0x8 else '')))
|
|
|
|
# show on-disk encoding of tags
|
|
if args.get('raw'):
|
|
for o, line in enumerate(xxd(mdir.data[j:j+d])):
|
|
print('%11s: %*s %s' % (
|
|
'%04x' % (j + o*16),
|
|
w_width, '',
|
|
line))
|
|
if args.get('raw') or args.get('no_truncate'):
|
|
if not tag & 0x8:
|
|
for o, line in enumerate(xxd(data)):
|
|
print('%11s: %*s %s' % (
|
|
'%04x' % (j+d + o*16),
|
|
w_width, '',
|
|
line))
|
|
|
|
# prbyd here means the last rendered rbyd, we update
|
|
# in dbg_entry to always print interleaved addresses
|
|
prbyd = None
|
|
def dbg_entry(id, w, rbyd, rid,
|
|
name_tag, name_j, name_d, name,
|
|
struct_tag, struct_j, struct_d, struct_,
|
|
depth=None):
|
|
nonlocal prbyd
|
|
|
|
# show human-readable representation
|
|
if name_tag:
|
|
print('%12s %*s %-22s %s' % (
|
|
'%04x.%04x:' % (rbyd.block, rbyd.trunk)
|
|
if prbyd is None or rbyd != prbyd
|
|
else '',
|
|
w_width, '%d-%d' % (id-(w-1), id) if w > 1
|
|
else id if w > 0
|
|
else '',
|
|
tagrepr(name_tag, w, len(name), None),
|
|
''.join(
|
|
b if b >= ' ' and b <= '~' else '.'
|
|
for b in map(chr, name))))
|
|
prbyd = rbyd
|
|
print('%12s %*s %-22s %s' % (
|
|
'%04x.%04x:' % (rbyd.block, rbyd.trunk)
|
|
if prbyd is None or rbyd != prbyd
|
|
else '',
|
|
w_width, '' if name_tag
|
|
else '%d-%d' % (id-(w-1), id) if w > 1
|
|
else id if w > 0
|
|
else '',
|
|
tagrepr(struct_tag,
|
|
w if not name_tag else 0,
|
|
len(struct_), None),
|
|
next(xxd(struct_, 8), '')
|
|
if not args.get('no_truncate') else ''))
|
|
prbyd = rbyd
|
|
|
|
# show in-device representation
|
|
if args.get('device'):
|
|
if name_tag:
|
|
print('%11s %*s %-22s%s' % (
|
|
'',
|
|
w_width, '',
|
|
'%04x %08x %07x' % (name_tag, w, len(name)),
|
|
' %s' % ' '.join(
|
|
'%08x' % fromle32(
|
|
rbyd.data[name_j+name_d+i*4
|
|
: name_j+name_d + min(i*4+4,len(name))])
|
|
for i in range(min(m.ceil(len(name)/4), 3)))[:23]))
|
|
print('%11s %*s %-22s%s' % (
|
|
'',
|
|
w_width, '',
|
|
'%04x %08x %07x' % (
|
|
struct_tag, w if not name_tag else 0, len(struct_)),
|
|
' %s' % ' '.join(
|
|
'%08x' % fromle32(
|
|
rbyd.data[struct_j+struct_d+i*4
|
|
: struct_j+struct_d + min(i*4+4,len(struct_))])
|
|
for i in range(min(m.ceil(len(struct_)/4), 3)))[:23]))
|
|
|
|
# show on-disk encoding of tags/data
|
|
if args.get('raw'):
|
|
for o, line in enumerate(xxd(
|
|
rbyd.data[name_j:name_j+name_d])):
|
|
print('%11s: %*s %s' % (
|
|
'%04x' % (name_j + o*16),
|
|
w_width, '',
|
|
line))
|
|
if args.get('raw'):
|
|
for o, line in enumerate(xxd(name)):
|
|
print('%11s: %*s %s' % (
|
|
'%04x' % (name_j+name_d + o*16),
|
|
w_width, '',
|
|
line))
|
|
if args.get('raw'):
|
|
for o, line in enumerate(xxd(
|
|
rbyd.data[struct_j:struct_j+struct_d])):
|
|
print('%11s: %*s %s' % (
|
|
'%04x' % (struct_j + o*16),
|
|
w_width, '',
|
|
line))
|
|
if args.get('raw') or args.get('no_truncate'):
|
|
for o, line in enumerate(xxd(struct_)):
|
|
print('%11s: %*s %s' % (
|
|
'%04x' % (struct_j+struct_d + o*16),
|
|
w_width, '',
|
|
line))
|
|
|
|
|
|
# print the actual mroot
|
|
print('mroot %s, rev %d, weight %d' % (
|
|
mroot.addr(), mroot.rev, mroot.weight))
|
|
|
|
# print header
|
|
w_width = (m.ceil(m.log10(max(1, mweight)+1))
|
|
+ 2*m.ceil(m.log10(max(1, rweight)+1))
|
|
+ 2)
|
|
print('%-11s %-*s %-22s %s' % (
|
|
'mdir',
|
|
w_width, 'ids',
|
|
'tag',
|
|
'data (truncated)'
|
|
if not args.get('no_truncate') else ''))
|
|
|
|
# show each mroot
|
|
prbyd = None
|
|
ppath = []
|
|
corrupted = False
|
|
mroot = Rbyd.fetch(f, block_size, mroots)
|
|
while True:
|
|
# corrupted?
|
|
if not mroot:
|
|
print('{%s}: %s%s%s' % (
|
|
','.join('%04x' % block
|
|
for block in it.chain([mroot.block],
|
|
mroot.other_blocks)),
|
|
'\x1b[31m' if color else '',
|
|
'(corrupted mroot %s)' % mroot.addr(),
|
|
'\x1b[m' if color else ''))
|
|
corrupted = True
|
|
else:
|
|
# show the mdir
|
|
dbg_mdir(mroot, -1)
|
|
|
|
# fetch the next mroot
|
|
done, rid, tag, w, j, d, data = mroot.lookup(-1, TAG_MROOT)
|
|
if not (not done and rid == -1 and tag == TAG_MROOT):
|
|
break
|
|
|
|
blocks = frommdir(data)
|
|
mroot = Rbyd.fetch(f, block_size, blocks)
|
|
|
|
# fetch the actual mtree, if there is one
|
|
done, rid, tag, w, j, d, data = mroot.lookup(-1, TAG_BTREE)
|
|
if not done and rid == -1 or tag == TAG_BTREE:
|
|
w, trunk, block, crc = frombtree(data)
|
|
mtree = Rbyd.fetch(f, block_size, block, trunk)
|
|
|
|
# traverse entries
|
|
mid = -1
|
|
while True:
|
|
(done, mid, w, rbyd, rid,
|
|
(name_tag, name_j, name_d, name),
|
|
(struct_tag, struct_j, struct_d, struct_),
|
|
path) = (btree_lookup(mtree, mid+1,
|
|
depth=args.get('depth')))
|
|
if done:
|
|
break
|
|
|
|
# print inner btree entries if requested
|
|
if args.get('inner'):
|
|
changed = False
|
|
for i, (x, px) in enumerate(
|
|
it.zip_longest(path[:-1], ppath[:-1])):
|
|
if x is None:
|
|
break
|
|
|
|
(id_, w_, rbyd_, rid_,
|
|
(name_tag_, name_j_, name_d_, name_),
|
|
(struct_tag_, struct_j_, struct_d_, struct__)) = x
|
|
|
|
if args.get('inner'):
|
|
if not (changed or px is None or x != px):
|
|
continue
|
|
changed = True
|
|
|
|
# show the inner entry
|
|
dbg_entry(id_, w_, rbyd_, rid_,
|
|
name_tag_, name_j_, name_d_, name_,
|
|
struct_tag_, struct_j_, struct_d_, struct__,
|
|
i)
|
|
ppath = path
|
|
|
|
# corrupted? try to keep printing the tree
|
|
if not rbyd:
|
|
print('%11s: %s%s%s' % (
|
|
'%04x.%04x' % (rbyd.block, rbyd.trunk),
|
|
'\x1b[31m' if color else '',
|
|
'(corrupted rbyd %s)' % rbyd.addr(),
|
|
'\x1b[m' if color else ''))
|
|
prbyd = rbyd
|
|
ppath = path
|
|
corrupted = True
|
|
continue
|
|
|
|
# print btree entries in certain cases
|
|
if args.get('inner') or struct_tag != TAG_MDIR:
|
|
dbg_entry(mid, w, rbyd, rid,
|
|
name_tag, name_j, name_d, name,
|
|
struct_tag, struct_j, struct_d, struct_)
|
|
|
|
if struct_tag != TAG_MDIR:
|
|
continue
|
|
|
|
# fetch the mdir
|
|
blocks = frommdir(struct_)
|
|
mdir = Rbyd.fetch(f, block_size, blocks)
|
|
|
|
# corrupted?
|
|
if not mdir:
|
|
print('{%s}: %s%s%s' % (
|
|
','.join('%04x' % block
|
|
for block in it.chain([mdir.block],
|
|
mdir.other_blocks)),
|
|
'\x1b[31m' if color else '',
|
|
'(corrupted mdir %s)' % mdir.addr(),
|
|
'\x1b[m' if color else ''))
|
|
corrupted = True
|
|
else:
|
|
# show the mdir
|
|
dbg_mdir(mdir, mid)
|
|
|
|
# force next btree entry to be shown
|
|
prbyd = None
|
|
|
|
if args.get('error_on_corrupt') and corrupted:
|
|
sys.exit(2)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
import argparse
|
|
import sys
|
|
parser = argparse.ArgumentParser(
|
|
description="Debug littlefs's metadata tree.",
|
|
allow_abbrev=False)
|
|
parser.add_argument(
|
|
'disk',
|
|
help="File containing the block device.")
|
|
parser.add_argument(
|
|
'mroots',
|
|
nargs='*',
|
|
type=rbydaddr,
|
|
help="Block address of the mroots. Defaults to 0x{0,1}.")
|
|
parser.add_argument(
|
|
'-B', '--block-size',
|
|
type=lambda x: int(x, 0),
|
|
help="Block size in bytes.")
|
|
parser.add_argument(
|
|
'--color',
|
|
choices=['never', 'always', 'auto'],
|
|
default='auto',
|
|
help="When to use terminal colors. Defaults to 'auto'.")
|
|
parser.add_argument(
|
|
'-r', '--raw',
|
|
action='store_true',
|
|
help="Show the raw data including tag encodings.")
|
|
parser.add_argument(
|
|
'-x', '--device',
|
|
action='store_true',
|
|
help="Show the device-side representation of tags.")
|
|
parser.add_argument(
|
|
'-T', '--no-truncate',
|
|
action='store_true',
|
|
help="Don't truncate, show the full contents.")
|
|
parser.add_argument(
|
|
'-i', '--inner',
|
|
action='store_true',
|
|
help="Show inner branches.")
|
|
parser.add_argument(
|
|
'-Z', '--depth',
|
|
type=lambda x: int(x, 0),
|
|
help="Depth of tree to show.")
|
|
parser.add_argument(
|
|
'-e', '--error-on-corrupt',
|
|
action='store_true',
|
|
help="Error if B-tree is corrupt.")
|
|
sys.exit(main(**{k: v
|
|
for k, v in vars(parser.parse_intermixed_args()).items()
|
|
if v is not None}))
|