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28
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1 # verify.py - repository integrity checking for Mercurial
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2 #
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3 # Copyright 2006, 2007 Matt Mackall <mpm@selenic.com>
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2, incorporated herein by reference.
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7
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8 from node import nullid, short
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9 from i18n import _
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10 import revlog, util, error
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11
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12 def verify(repo):
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13 lock = repo.lock()
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14 try:
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15 return _verify(repo)
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16 finally:
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17 lock.release()
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18
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19 def _verify(repo):
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20 mflinkrevs = {}
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21 filelinkrevs = {}
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22 filenodes = {}
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23 revisions = 0
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24 badrevs = set()
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25 errors = [0]
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26 warnings = [0]
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27 ui = repo.ui
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28 cl = repo.changelog
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29 mf = repo.manifest
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30
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31 if not repo.cancopy():
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32 raise util.Abort(_("cannot verify bundle or remote repos"))
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33
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34 def err(linkrev, msg, filename=None):
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35 if linkrev != None:
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36 badrevs.add(linkrev)
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37 else:
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38 linkrev = '?'
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39 msg = "%s: %s" % (linkrev, msg)
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40 if filename:
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41 msg = "%s@%s" % (filename, msg)
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42 ui.warn(" " + msg + "\n")
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43 errors[0] += 1
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44
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45 def exc(linkrev, msg, inst, filename=None):
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46 if isinstance(inst, KeyboardInterrupt):
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47 ui.warn(_("interrupted"))
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48 raise
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49 err(linkrev, "%s: %s" % (msg, inst), filename)
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50
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51 def warn(msg):
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52 ui.warn(msg + "\n")
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53 warnings[0] += 1
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54
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55 def checklog(obj, name, linkrev):
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56 if not len(obj) and (havecl or havemf):
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57 err(linkrev, _("empty or missing %s") % name)
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58 return
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59
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60 d = obj.checksize()
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61 if d[0]:
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62 err(None, _("data length off by %d bytes") % d[0], name)
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63 if d[1]:
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64 err(None, _("index contains %d extra bytes") % d[1], name)
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65
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66 if obj.version != revlog.REVLOGV0:
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67 if not revlogv1:
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68 warn(_("warning: `%s' uses revlog format 1") % name)
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69 elif revlogv1:
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70 warn(_("warning: `%s' uses revlog format 0") % name)
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71
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72 def checkentry(obj, i, node, seen, linkrevs, f):
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73 lr = obj.linkrev(obj.rev(node))
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74 if lr < 0 or (havecl and lr not in linkrevs):
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75 if lr < 0 or lr >= len(cl):
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76 msg = _("rev %d points to nonexistent changeset %d")
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77 else:
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78 msg = _("rev %d points to unexpected changeset %d")
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79 err(None, msg % (i, lr), f)
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80 if linkrevs:
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81 warn(_(" (expected %s)") % " ".join(map(str,linkrevs)))
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82 lr = None # can't be trusted
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83
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84 try:
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85 p1, p2 = obj.parents(node)
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86 if p1 not in seen and p1 != nullid:
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87 err(lr, _("unknown parent 1 %s of %s") %
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88 (short(p1), short(n)), f)
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89 if p2 not in seen and p2 != nullid:
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90 err(lr, _("unknown parent 2 %s of %s") %
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91 (short(p2), short(p1)), f)
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92 except Exception, inst:
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93 exc(lr, _("checking parents of %s") % short(node), inst, f)
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94
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95 if node in seen:
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96 err(lr, _("duplicate revision %d (%d)") % (i, seen[n]), f)
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97 seen[n] = i
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98 return lr
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99
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100 revlogv1 = cl.version != revlog.REVLOGV0
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101 if ui.verbose or not revlogv1:
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102 ui.status(_("repository uses revlog format %d\n") %
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103 (revlogv1 and 1 or 0))
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104
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105 havecl = len(cl) > 0
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106 havemf = len(mf) > 0
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107
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108 ui.status(_("checking changesets\n"))
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109 seen = {}
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110 checklog(cl, "changelog", 0)
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111 for i in repo:
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112 n = cl.node(i)
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113 checkentry(cl, i, n, seen, [i], "changelog")
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114
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115 try:
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116 changes = cl.read(n)
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117 mflinkrevs.setdefault(changes[0], []).append(i)
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118 for f in changes[3]:
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119 filelinkrevs.setdefault(f, []).append(i)
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120 except Exception, inst:
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121 exc(i, _("unpacking changeset %s") % short(n), inst)
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122
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123 ui.status(_("checking manifests\n"))
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124 seen = {}
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125 checklog(mf, "manifest", 0)
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126 for i in mf:
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127 n = mf.node(i)
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128 lr = checkentry(mf, i, n, seen, mflinkrevs.get(n, []), "manifest")
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129 if n in mflinkrevs:
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130 del mflinkrevs[n]
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131 else:
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132 err(lr, _("%s not in changesets") % short(n), "manifest")
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133
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134 try:
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135 for f, fn in mf.readdelta(n).iteritems():
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136 if not f:
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137 err(lr, _("file without name in manifest"))
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138 elif f != "/dev/null":
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139 fns = filenodes.setdefault(f, {})
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140 if fn not in fns:
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141 fns[fn] = i
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142 except Exception, inst:
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143 exc(lr, _("reading manifest delta %s") % short(n), inst)
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144
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145 ui.status(_("crosschecking files in changesets and manifests\n"))
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146
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147 if havemf:
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148 for c,m in sorted([(c, m) for m in mflinkrevs for c in mflinkrevs[m]]):
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149 err(c, _("changeset refers to unknown manifest %s") % short(m))
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150 del mflinkrevs
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151
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152 for f in sorted(filelinkrevs):
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153 if f not in filenodes:
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154 lr = filelinkrevs[f][0]
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155 err(lr, _("in changeset but not in manifest"), f)
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156
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157 if havecl:
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158 for f in sorted(filenodes):
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159 if f not in filelinkrevs:
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160 try:
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161 fl = repo.file(f)
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162 lr = min([fl.linkrev(fl.rev(n)) for n in filenodes[f]])
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163 except:
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164 lr = None
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165 err(lr, _("in manifest but not in changeset"), f)
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166
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167 ui.status(_("checking files\n"))
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168
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169 storefiles = set()
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170 for f, f2, size in repo.store.datafiles():
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171 if not f:
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172 err(None, _("cannot decode filename '%s'") % f2)
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173 elif size > 0:
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174 storefiles.add(f)
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175
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176 files = sorted(set(filenodes) | set(filelinkrevs))
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177 for f in files:
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178 try:
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179 linkrevs = filelinkrevs[f]
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180 except KeyError:
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181 # in manifest but not in changelog
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182 linkrevs = []
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183
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184 if linkrevs:
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185 lr = linkrevs[0]
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186 else:
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187 lr = None
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188
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189 try:
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190 fl = repo.file(f)
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191 except error.RevlogError, e:
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192 err(lr, _("broken revlog! (%s)") % e, f)
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193 continue
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194
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195 for ff in fl.files():
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196 try:
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197 storefiles.remove(ff)
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198 except KeyError:
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199 err(lr, _("missing revlog!"), ff)
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200
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201 checklog(fl, f, lr)
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202 seen = {}
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203 for i in fl:
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204 revisions += 1
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205 n = fl.node(i)
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206 lr = checkentry(fl, i, n, seen, linkrevs, f)
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207 if f in filenodes:
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208 if havemf and n not in filenodes[f]:
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209 err(lr, _("%s not in manifests") % (short(n)), f)
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210 else:
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211 del filenodes[f][n]
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212
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213 # verify contents
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214 try:
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215 t = fl.read(n)
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216 rp = fl.renamed(n)
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217 if len(t) != fl.size(i):
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218 if len(fl.revision(n)) != fl.size(i):
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219 err(lr, _("unpacked size is %s, %s expected") %
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220 (len(t), fl.size(i)), f)
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221 except Exception, inst:
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222 exc(lr, _("unpacking %s") % short(n), inst, f)
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223
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224 # check renames
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225 try:
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226 if rp:
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227 fl2 = repo.file(rp[0])
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228 if not len(fl2):
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229 err(lr, _("empty or missing copy source revlog %s:%s")
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230 % (rp[0], short(rp[1])), f)
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231 elif rp[1] == nullid:
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232 ui.note(_("warning: %s@%s: copy source"
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233 " revision is nullid %s:%s\n")
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234 % (f, lr, rp[0], short(rp[1])))
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235 else:
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236 fl2.rev(rp[1])
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237 except Exception, inst:
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238 exc(lr, _("checking rename of %s") % short(n), inst, f)
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239
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240 # cross-check
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241 if f in filenodes:
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242 fns = [(mf.linkrev(l), n) for n,l in filenodes[f].iteritems()]
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243 for lr, node in sorted(fns):
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244 err(lr, _("%s in manifests not found") % short(node), f)
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245
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246 for f in storefiles:
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247 warn(_("warning: orphan revlog '%s'") % f)
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248
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249 ui.status(_("%d files, %d changesets, %d total revisions\n") %
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250 (len(files), len(cl), revisions))
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251 if warnings[0]:
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252 ui.warn(_("%d warnings encountered!\n") % warnings[0])
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253 if errors[0]:
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254 ui.warn(_("%d integrity errors encountered!\n") % errors[0])
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255 if badrevs:
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256 ui.warn(_("(first damaged changeset appears to be %d)\n")
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257 % min(badrevs))
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258 return 1
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