verify: move cross-checking of changeset/manifest out of _crosscheckfiles()
Reasons:
* _crosscheckfiles(), as the name suggests, is about checking that
the set of files files mentioned in changesets match the set of
files mentioned in the manifests.
* The "checking" in _crosscheckfiles() looked rather strange, as it
just emitted an error for *every* entry in mflinkrevs. The reason
was that these were the entries remaining after the call to
_verifymanifest(). Moving all the processing of mflinkrevs into
_verifymanifest() makes it much clearer that it's the remaining
entries that are a problem.
Functional change: progress is no longer reported for "crosschecking"
of missing manifest entries. Since the crosschecking phase takes a
tiny fraction of the verification, I don't think this is a
problem. Also, any reports of "changeset refers to unknown manifest"
will now come before "crosschecking files in changesets and
manifests".
# verify.py - repository integrity checking for Mercurial
#
# Copyright 2006, 2007 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import
import os
from .i18n import _
from .node import (
nullid,
short,
)
from . import (
error,
revlog,
util,
)
def verify(repo):
with repo.lock():
return verifier(repo).verify()
def _normpath(f):
# under hg < 2.4, convert didn't sanitize paths properly, so a
# converted repo may contain repeated slashes
while '//' in f:
f = f.replace('//', '/')
return f
def _validpath(repo, path):
"""Returns False if a path should NOT be treated as part of a repo.
For all in-core cases, this returns True, as we have no way for a
path to be mentioned in the history but not actually be
relevant. For narrow clones, this is important because many
filelogs will be missing, and changelog entries may mention
modified files that are outside the narrow scope.
"""
return True
class verifier(object):
def __init__(self, repo):
self.repo = repo.unfiltered()
self.ui = repo.ui
self.badrevs = set()
self.errors = 0
self.warnings = 0
self.havecl = len(repo.changelog) > 0
self.havemf = len(repo.manifest) > 0
self.revlogv1 = repo.changelog.version != revlog.REVLOGV0
self.lrugetctx = util.lrucachefunc(repo.changectx)
self.refersmf = False
self.fncachewarned = False
def warn(self, msg):
self.ui.warn(msg + "\n")
self.warnings += 1
def err(self, linkrev, msg, filename=None):
if linkrev is not None:
self.badrevs.add(linkrev)
else:
linkrev = '?'
msg = "%s: %s" % (linkrev, msg)
if filename:
msg = "%s@%s" % (filename, msg)
self.ui.warn(" " + msg + "\n")
self.errors += 1
def exc(self, linkrev, msg, inst, filename=None):
if not str(inst):
inst = repr(inst)
self.err(linkrev, "%s: %s" % (msg, inst), filename)
def checklog(self, obj, name, linkrev):
if not len(obj) and (self.havecl or self.havemf):
self.err(linkrev, _("empty or missing %s") % name)
return
d = obj.checksize()
if d[0]:
self.err(None, _("data length off by %d bytes") % d[0], name)
if d[1]:
self.err(None, _("index contains %d extra bytes") % d[1], name)
if obj.version != revlog.REVLOGV0:
if not self.revlogv1:
self.warn(_("warning: `%s' uses revlog format 1") % name)
elif self.revlogv1:
self.warn(_("warning: `%s' uses revlog format 0") % name)
def checkentry(self, obj, i, node, seen, linkrevs, f):
lr = obj.linkrev(obj.rev(node))
if lr < 0 or (self.havecl and lr not in linkrevs):
if lr < 0 or lr >= len(self.repo.changelog):
msg = _("rev %d points to nonexistent changeset %d")
else:
msg = _("rev %d points to unexpected changeset %d")
self.err(None, msg % (i, lr), f)
if linkrevs:
if f and len(linkrevs) > 1:
try:
# attempt to filter down to real linkrevs
linkrevs = [l for l in linkrevs
if self.lrugetctx(l)[f].filenode() == node]
except Exception:
pass
self.warn(_(" (expected %s)") % " ".join(map(str, linkrevs)))
lr = None # can't be trusted
try:
p1, p2 = obj.parents(node)
if p1 not in seen and p1 != nullid:
self.err(lr, _("unknown parent 1 %s of %s") %
(short(p1), short(node)), f)
if p2 not in seen and p2 != nullid:
self.err(lr, _("unknown parent 2 %s of %s") %
(short(p2), short(node)), f)
except Exception as inst:
self.exc(lr, _("checking parents of %s") % short(node), inst, f)
if node in seen:
self.err(lr, _("duplicate revision %d (%d)") % (i, seen[node]), f)
seen[node] = i
return lr
def verify(self):
repo = self.repo
ui = repo.ui
if not repo.url().startswith('file:'):
raise error.Abort(_("cannot verify bundle or remote repos"))
if os.path.exists(repo.sjoin("journal")):
ui.warn(_("abandoned transaction found - run hg recover\n"))
if ui.verbose or not self.revlogv1:
ui.status(_("repository uses revlog format %d\n") %
(self.revlogv1 and 1 or 0))
mflinkrevs, filelinkrevs = self._verifychangelog()
filenodes = self._verifymanifest(mflinkrevs)
del mflinkrevs
self._crosscheckfiles(filelinkrevs, filenodes)
totalfiles, filerevisions = self._verifyfiles(filenodes, filelinkrevs)
ui.status(_("%d files, %d changesets, %d total revisions\n") %
(totalfiles, len(repo.changelog), filerevisions))
if self.warnings:
ui.warn(_("%d warnings encountered!\n") % self.warnings)
if self.fncachewarned:
ui.warn(_('hint: run "hg debugrebuildfncache" to recover from '
'corrupt fncache\n'))
if self.errors:
ui.warn(_("%d integrity errors encountered!\n") % self.errors)
if self.badrevs:
ui.warn(_("(first damaged changeset appears to be %d)\n")
% min(self.badrevs))
return 1
def _verifychangelog(self):
ui = self.ui
repo = self.repo
cl = repo.changelog
ui.status(_("checking changesets\n"))
mflinkrevs = {}
filelinkrevs = {}
seen = {}
self.checklog(cl, "changelog", 0)
total = len(repo)
for i in repo:
ui.progress(_('checking'), i, total=total, unit=_('changesets'))
n = cl.node(i)
self.checkentry(cl, i, n, seen, [i], "changelog")
try:
changes = cl.read(n)
if changes[0] != nullid:
mflinkrevs.setdefault(changes[0], []).append(i)
self.refersmf = True
for f in changes[3]:
if _validpath(repo, f):
filelinkrevs.setdefault(_normpath(f), []).append(i)
except Exception as inst:
self.refersmf = True
self.exc(i, _("unpacking changeset %s") % short(n), inst)
ui.progress(_('checking'), None)
return mflinkrevs, filelinkrevs
def _verifymanifest(self, mflinkrevs):
repo = self.repo
ui = self.ui
mf = self.repo.manifest
ui.status(_("checking manifests\n"))
filenodes = {}
seen = {}
if self.refersmf:
# Do not check manifest if there are only changelog entries with
# null manifests.
self.checklog(mf, "manifest", 0)
total = len(mf)
for i in mf:
ui.progress(_('checking'), i, total=total, unit=_('manifests'))
n = mf.node(i)
lr = self.checkentry(mf, i, n, seen, mflinkrevs.get(n, []),
"manifest")
if n in mflinkrevs:
del mflinkrevs[n]
else:
self.err(lr, _("%s not in changesets") % short(n), "manifest")
try:
for f, fn in mf.readdelta(n).iteritems():
if not f:
self.err(lr, _("file without name in manifest"))
elif f != "/dev/null": # ignore this in very old repos
if _validpath(repo, f):
filenodes.setdefault(
_normpath(f), {}).setdefault(fn, lr)
except Exception as inst:
self.exc(lr, _("reading manifest delta %s") % short(n), inst)
ui.progress(_('checking'), None)
if self.havemf:
for c, m in sorted([(c, m) for m in mflinkrevs
for c in mflinkrevs[m]]):
if m == nullid:
continue
self.err(c, _("changeset refers to unknown manifest %s") %
short(m))
return filenodes
def _crosscheckfiles(self, filelinkrevs, filenodes):
repo = self.repo
ui = self.ui
ui.status(_("crosschecking files in changesets and manifests\n"))
total = len(filelinkrevs) + len(filenodes)
count = 0
if self.havemf:
for f in sorted(filelinkrevs):
count += 1
ui.progress(_('crosschecking'), count, total=total)
if f not in filenodes:
lr = filelinkrevs[f][0]
self.err(lr, _("in changeset but not in manifest"), f)
if self.havecl:
for f in sorted(filenodes):
count += 1
ui.progress(_('crosschecking'), count, total=total)
if f not in filelinkrevs:
try:
fl = repo.file(f)
lr = min([fl.linkrev(fl.rev(n)) for n in filenodes[f]])
except Exception:
lr = None
self.err(lr, _("in manifest but not in changeset"), f)
ui.progress(_('crosschecking'), None)
def _verifyfiles(self, filenodes, filelinkrevs):
repo = self.repo
ui = self.ui
lrugetctx = self.lrugetctx
revlogv1 = self.revlogv1
havemf = self.havemf
ui.status(_("checking files\n"))
storefiles = set()
for f, f2, size in repo.store.datafiles():
if not f:
self.err(None, _("cannot decode filename '%s'") % f2)
elif (size > 0 or not revlogv1) and f.startswith('data/'):
storefiles.add(_normpath(f))
files = sorted(set(filenodes) | set(filelinkrevs))
total = len(files)
revisions = 0
for i, f in enumerate(files):
ui.progress(_('checking'), i, item=f, total=total)
try:
linkrevs = filelinkrevs[f]
except KeyError:
# in manifest but not in changelog
linkrevs = []
if linkrevs:
lr = linkrevs[0]
else:
lr = None
try:
fl = repo.file(f)
except error.RevlogError as e:
self.err(lr, _("broken revlog! (%s)") % e, f)
continue
for ff in fl.files():
try:
storefiles.remove(ff)
except KeyError:
self.warn(_(" warning: revlog '%s' not in fncache!") % ff)
self.fncachewarned = True
self.checklog(fl, f, lr)
seen = {}
rp = None
for i in fl:
revisions += 1
n = fl.node(i)
lr = self.checkentry(fl, i, n, seen, linkrevs, f)
if f in filenodes:
if havemf and n not in filenodes[f]:
self.err(lr, _("%s not in manifests") % (short(n)), f)
else:
del filenodes[f][n]
# verify contents
try:
l = len(fl.read(n))
rp = fl.renamed(n)
if l != fl.size(i):
if len(fl.revision(n)) != fl.size(i):
self.err(lr, _("unpacked size is %s, %s expected") %
(l, fl.size(i)), f)
except error.CensoredNodeError:
# experimental config: censor.policy
if ui.config("censor", "policy", "abort") == "abort":
self.err(lr, _("censored file data"), f)
except Exception as inst:
self.exc(lr, _("unpacking %s") % short(n), inst, f)
# check renames
try:
if rp:
if lr is not None and ui.verbose:
ctx = lrugetctx(lr)
found = False
for pctx in ctx.parents():
if rp[0] in pctx:
found = True
break
if not found:
self.warn(_("warning: copy source of '%s' not"
" in parents of %s") % (f, ctx))
fl2 = repo.file(rp[0])
if not len(fl2):
self.err(lr, _("empty or missing copy source "
"revlog %s:%s") % (rp[0], short(rp[1])), f)
elif rp[1] == nullid:
ui.note(_("warning: %s@%s: copy source"
" revision is nullid %s:%s\n")
% (f, lr, rp[0], short(rp[1])))
else:
fl2.rev(rp[1])
except Exception as inst:
self.exc(lr, _("checking rename of %s") % short(n), inst, f)
# cross-check
if f in filenodes:
fns = [(lr, n) for n, lr in filenodes[f].iteritems()]
for lr, node in sorted(fns):
self.err(lr, _("%s in manifests not found") % short(node),
f)
ui.progress(_('checking'), None)
for f in storefiles:
self.warn(_("warning: orphan revlog '%s'") % f)
return len(files), revisions