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# verify.py - repository integrity checking for Mercurial
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#
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# Copyright 2006, 2007 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import os
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from .i18n import _
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from .node import (
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nullid,
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short,
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)
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from . import (
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error,
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pycompat,
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revlog,
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scmutil,
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util,
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)
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def verify(repo):
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with repo.lock():
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return verifier(repo).verify()
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def _normpath(f):
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# under hg < 2.4, convert didn't sanitize paths properly, so a
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# converted repo may contain repeated slashes
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while '//' in f:
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f = f.replace('//', '/')
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return f
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class verifier(object):
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# The match argument is always None in hg core, but e.g. the narrowhg
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# extension will pass in a matcher here.
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def __init__(self, repo, match=None):
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self.repo = repo.unfiltered()
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self.ui = repo.ui
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self.match = match or scmutil.matchall(repo)
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self.badrevs = set()
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self.errors = 0
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self.warnings = 0
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self.havecl = len(repo.changelog) > 0
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self.havemf = len(repo.manifestlog._revlog) > 0
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self.revlogv1 = repo.changelog.version != revlog.REVLOGV0
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self.lrugetctx = util.lrucachefunc(repo.changectx)
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self.refersmf = False
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self.fncachewarned = False
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# developer config: verify.skipflags
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self.skipflags = repo.ui.configint('verify', 'skipflags')
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def warn(self, msg):
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self.ui.warn(msg + "\n")
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self.warnings += 1
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def err(self, linkrev, msg, filename=None):
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if linkrev is not None:
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self.badrevs.add(linkrev)
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linkrev = "%d" % linkrev
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else:
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linkrev = '?'
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msg = "%s: %s" % (linkrev, msg)
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if filename:
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msg = "%s@%s" % (filename, msg)
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self.ui.warn(" " + msg + "\n")
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self.errors += 1
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def exc(self, linkrev, msg, inst, filename=None):
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if not str(inst):
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inst = repr(inst)
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self.err(linkrev, "%s: %s" % (msg, inst), filename)
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def checklog(self, obj, name, linkrev):
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if not len(obj) and (self.havecl or self.havemf):
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self.err(linkrev, _("empty or missing %s") % name)
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return
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d = obj.checksize()
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if d[0]:
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self.err(None, _("data length off by %d bytes") % d[0], name)
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if d[1]:
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self.err(None, _("index contains %d extra bytes") % d[1], name)
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if obj.version != revlog.REVLOGV0:
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if not self.revlogv1:
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self.warn(_("warning: `%s' uses revlog format 1") % name)
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elif self.revlogv1:
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self.warn(_("warning: `%s' uses revlog format 0") % name)
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def checkentry(self, obj, i, node, seen, linkrevs, f):
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lr = obj.linkrev(obj.rev(node))
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if lr < 0 or (self.havecl and lr not in linkrevs):
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if lr < 0 or lr >= len(self.repo.changelog):
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msg = _("rev %d points to nonexistent changeset %d")
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else:
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msg = _("rev %d points to unexpected changeset %d")
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self.err(None, msg % (i, lr), f)
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if linkrevs:
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if f and len(linkrevs) > 1:
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try:
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# attempt to filter down to real linkrevs
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linkrevs = [l for l in linkrevs
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if self.lrugetctx(l)[f].filenode() == node]
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except Exception:
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pass
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self.warn(_(" (expected %s)") % " ".join
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(map(pycompat.bytestr, linkrevs)))
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lr = None # can't be trusted
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try:
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p1, p2 = obj.parents(node)
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if p1 not in seen and p1 != nullid:
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self.err(lr, _("unknown parent 1 %s of %s") %
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(short(p1), short(node)), f)
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if p2 not in seen and p2 != nullid:
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self.err(lr, _("unknown parent 2 %s of %s") %
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(short(p2), short(node)), f)
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except Exception as inst:
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self.exc(lr, _("checking parents of %s") % short(node), inst, f)
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if node in seen:
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self.err(lr, _("duplicate revision %d (%d)") % (i, seen[node]), f)
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seen[node] = i
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return lr
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def verify(self):
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repo = self.repo
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ui = repo.ui
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if not repo.url().startswith('file:'):
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raise error.Abort(_("cannot verify bundle or remote repos"))
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if os.path.exists(repo.sjoin("journal")):
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ui.warn(_("abandoned transaction found - run hg recover\n"))
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if ui.verbose or not self.revlogv1:
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ui.status(_("repository uses revlog format %d\n") %
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(self.revlogv1 and 1 or 0))
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mflinkrevs, filelinkrevs = self._verifychangelog()
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filenodes = self._verifymanifest(mflinkrevs)
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del mflinkrevs
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self._crosscheckfiles(filelinkrevs, filenodes)
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totalfiles, filerevisions = self._verifyfiles(filenodes, filelinkrevs)
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ui.status(_("%d files, %d changesets, %d total revisions\n") %
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(totalfiles, len(repo.changelog), filerevisions))
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if self.warnings:
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ui.warn(_("%d warnings encountered!\n") % self.warnings)
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if self.fncachewarned:
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ui.warn(_('hint: run "hg debugrebuildfncache" to recover from '
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'corrupt fncache\n'))
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if self.errors:
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ui.warn(_("%d integrity errors encountered!\n") % self.errors)
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if self.badrevs:
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ui.warn(_("(first damaged changeset appears to be %d)\n")
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% min(self.badrevs))
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return 1
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def _verifychangelog(self):
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ui = self.ui
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repo = self.repo
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match = self.match
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cl = repo.changelog
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ui.status(_("checking changesets\n"))
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mflinkrevs = {}
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filelinkrevs = {}
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seen = {}
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self.checklog(cl, "changelog", 0)
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total = len(repo)
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for i in repo:
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ui.progress(_('checking'), i, total=total, unit=_('changesets'))
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n = cl.node(i)
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self.checkentry(cl, i, n, seen, [i], "changelog")
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try:
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changes = cl.read(n)
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if changes[0] != nullid:
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mflinkrevs.setdefault(changes[0], []).append(i)
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self.refersmf = True
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for f in changes[3]:
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if match(f):
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filelinkrevs.setdefault(_normpath(f), []).append(i)
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except Exception as inst:
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self.refersmf = True
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self.exc(i, _("unpacking changeset %s") % short(n), inst)
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ui.progress(_('checking'), None)
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return mflinkrevs, filelinkrevs
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def _verifymanifest(self, mflinkrevs, dir="", storefiles=None,
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progress=None):
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repo = self.repo
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ui = self.ui
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match = self.match
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mfl = self.repo.manifestlog
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mf = mfl._revlog.dirlog(dir)
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if not dir:
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self.ui.status(_("checking manifests\n"))
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filenodes = {}
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subdirnodes = {}
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seen = {}
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label = "manifest"
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if dir:
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label = dir
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revlogfiles = mf.files()
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storefiles.difference_update(revlogfiles)
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if progress: # should be true since we're in a subdirectory
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progress()
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if self.refersmf:
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# Do not check manifest if there are only changelog entries with
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# null manifests.
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self.checklog(mf, label, 0)
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total = len(mf)
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for i in mf:
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if not dir:
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ui.progress(_('checking'), i, total=total, unit=_('manifests'))
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n = mf.node(i)
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lr = self.checkentry(mf, i, n, seen, mflinkrevs.get(n, []), label)
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if n in mflinkrevs:
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del mflinkrevs[n]
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elif dir:
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self.err(lr, _("%s not in parent-directory manifest") %
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short(n), label)
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else:
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self.err(lr, _("%s not in changesets") % short(n), label)
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try:
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mfdelta = mfl.get(dir, n).readdelta(shallow=True)
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for f, fn, fl in mfdelta.iterentries():
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if not f:
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self.err(lr, _("entry without name in manifest"))
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elif f == "/dev/null": # ignore this in very old repos
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continue
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fullpath = dir + _normpath(f)
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if fl == 't':
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if not match.visitdir(fullpath):
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continue
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subdirnodes.setdefault(fullpath + '/', {}).setdefault(
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fn, []).append(lr)
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else:
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if not match(fullpath):
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continue
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filenodes.setdefault(fullpath, {}).setdefault(fn, lr)
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except Exception as inst:
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self.exc(lr, _("reading delta %s") % short(n), inst, label)
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if not dir:
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ui.progress(_('checking'), None)
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if self.havemf:
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for c, m in sorted([(c, m) for m in mflinkrevs
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for c in mflinkrevs[m]]):
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if dir:
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self.err(c, _("parent-directory manifest refers to unknown "
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"revision %s") % short(m), label)
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else:
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self.err(c, _("changeset refers to unknown revision %s") %
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short(m), label)
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if not dir and subdirnodes:
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self.ui.status(_("checking directory manifests\n"))
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storefiles = set()
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subdirs = set()
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revlogv1 = self.revlogv1
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for f, f2, size in repo.store.datafiles():
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if not f:
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self.err(None, _("cannot decode filename '%s'") % f2)
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elif (size > 0 or not revlogv1) and f.startswith('meta/'):
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storefiles.add(_normpath(f))
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subdirs.add(os.path.dirname(f))
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subdircount = len(subdirs)
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currentsubdir = [0]
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def progress():
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currentsubdir[0] += 1
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ui.progress(_('checking'), currentsubdir[0], total=subdircount,
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unit=_('manifests'))
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for subdir, linkrevs in subdirnodes.iteritems():
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subdirfilenodes = self._verifymanifest(linkrevs, subdir, storefiles,
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progress)
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for f, onefilenodes in subdirfilenodes.iteritems():
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filenodes.setdefault(f, {}).update(onefilenodes)
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if not dir and subdirnodes:
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ui.progress(_('checking'), None)
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for f in sorted(storefiles):
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self.warn(_("warning: orphan revlog '%s'") % f)
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return filenodes
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def _crosscheckfiles(self, filelinkrevs, filenodes):
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repo = self.repo
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ui = self.ui
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ui.status(_("crosschecking files in changesets and manifests\n"))
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total = len(filelinkrevs) + len(filenodes)
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count = 0
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if self.havemf:
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for f in sorted(filelinkrevs):
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count += 1
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ui.progress(_('crosschecking'), count, total=total)
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if f not in filenodes:
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lr = filelinkrevs[f][0]
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self.err(lr, _("in changeset but not in manifest"), f)
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if self.havecl:
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for f in sorted(filenodes):
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count += 1
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ui.progress(_('crosschecking'), count, total=total)
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if f not in filelinkrevs:
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try:
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fl = repo.file(f)
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lr = min([fl.linkrev(fl.rev(n)) for n in filenodes[f]])
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except Exception:
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lr = None
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self.err(lr, _("in manifest but not in changeset"), f)
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ui.progress(_('crosschecking'), None)
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def _verifyfiles(self, filenodes, filelinkrevs):
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repo = self.repo
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ui = self.ui
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lrugetctx = self.lrugetctx
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revlogv1 = self.revlogv1
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havemf = self.havemf
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ui.status(_("checking files\n"))
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storefiles = set()
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for f, f2, size in repo.store.datafiles():
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if not f:
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self.err(None, _("cannot decode filename '%s'") % f2)
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elif (size > 0 or not revlogv1) and f.startswith('data/'):
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storefiles.add(_normpath(f))
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files = sorted(set(filenodes) | set(filelinkrevs))
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total = len(files)
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revisions = 0
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for i, f in enumerate(files):
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ui.progress(_('checking'), i, item=f, total=total, unit=_('files'))
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try:
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linkrevs = filelinkrevs[f]
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except KeyError:
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# in manifest but not in changelog
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linkrevs = []
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if linkrevs:
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lr = linkrevs[0]
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else:
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lr = None
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try:
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fl = repo.file(f)
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except error.RevlogError as e:
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self.err(lr, _("broken revlog! (%s)") % e, f)
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continue
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for ff in fl.files():
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try:
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storefiles.remove(ff)
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except KeyError:
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self.warn(_(" warning: revlog '%s' not in fncache!") % ff)
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self.fncachewarned = True
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self.checklog(fl, f, lr)
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seen = {}
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rp = None
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for i in fl:
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revisions += 1
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n = fl.node(i)
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lr = self.checkentry(fl, i, n, seen, linkrevs, f)
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if f in filenodes:
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if havemf and n not in filenodes[f]:
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self.err(lr, _("%s not in manifests") % (short(n)), f)
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else:
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del filenodes[f][n]
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# Verify contents. 4 cases to care about:
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#
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# common: the most common case
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# rename: with a rename
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# meta: file content starts with b'\1\n', the metadata
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# header defined in filelog.py, but without a rename
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# ext: content stored externally
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#
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# More formally, their differences are shown below:
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#
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# | common | rename | meta | ext
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# -------------------------------------------------------
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# flags() | 0 | 0 | 0 | not 0
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# renamed() | False | True | False | ?
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# rawtext[0:2]=='\1\n'| False | True | True | ?
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#
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# "rawtext" means the raw text stored in revlog data, which
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# could be retrieved by "revision(rev, raw=True)". "text"
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# mentioned below is "revision(rev, raw=False)".
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#
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# There are 3 different lengths stored physically:
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# 1. L1: rawsize, stored in revlog index
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# 2. L2: len(rawtext), stored in revlog data
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# 3. L3: len(text), stored in revlog data if flags==0, or
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# possibly somewhere else if flags!=0
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#
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# L1 should be equal to L2. L3 could be different from them.
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# "text" may or may not affect commit hash depending on flag
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# processors (see revlog.addflagprocessor).
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#
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# | common | rename | meta | ext
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# -------------------------------------------------
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# rawsize() | L1 | L1 | L1 | L1
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# size() | L1 | L2-LM | L1(*) | L1 (?)
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# len(rawtext) | L2 | L2 | L2 | L2
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# len(text) | L2 | L2 | L2 | L3
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# len(read()) | L2 | L2-LM | L2-LM | L3 (?)
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#
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# LM: length of metadata, depending on rawtext
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# (*): not ideal, see comment in filelog.size
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# (?): could be "- len(meta)" if the resolved content has
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# rename metadata
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#
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# Checks needed to be done:
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# 1. length check: L1 == L2, in all cases.
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# 2. hash check: depending on flag processor, we may need to
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# use either "text" (external), or "rawtext" (in revlog).
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try:
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skipflags = self.skipflags
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if skipflags:
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skipflags &= fl.flags(i)
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if not skipflags:
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fl.read(n) # side effect: read content and do checkhash
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rp = fl.renamed(n)
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# the "L1 == L2" check
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l1 = fl.rawsize(i)
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l2 = len(fl.revision(n, raw=True))
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if l1 != l2:
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self.err(lr, _("unpacked size is %s, %s expected") %
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(l2, l1), f)
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except error.CensoredNodeError:
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# experimental config: censor.policy
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if ui.config("censor", "policy") == "abort":
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self.err(lr, _("censored file data"), f)
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except Exception as inst:
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self.exc(lr, _("unpacking %s") % short(n), inst, f)
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# check renames
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try:
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if rp:
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if lr is not None and ui.verbose:
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ctx = lrugetctx(lr)
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if not any(rp[0] in pctx for pctx in ctx.parents()):
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self.warn(_("warning: copy source of '%s' not"
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" in parents of %s") % (f, ctx))
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fl2 = repo.file(rp[0])
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if not len(fl2):
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self.err(lr, _("empty or missing copy source "
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"revlog %s:%s") % (rp[0], short(rp[1])), f)
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elif rp[1] == nullid:
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ui.note(_("warning: %s@%s: copy source"
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" revision is nullid %s:%s\n")
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% (f, lr, rp[0], short(rp[1])))
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else:
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fl2.rev(rp[1])
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except Exception as inst:
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self.exc(lr, _("checking rename of %s") % short(n), inst, f)
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# cross-check
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if f in filenodes:
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fns = [(v, k) for k, v in filenodes[f].iteritems()]
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for lr, node in sorted(fns):
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self.err(lr, _("manifest refers to unknown revision %s") %
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short(node), f)
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ui.progress(_('checking'), None)
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for f in sorted(storefiles):
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self.warn(_("warning: orphan revlog '%s'") % f)
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return len(files), revisions
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