filelog: stop proxying flags() (API)
Per-revision storage flags are kinda a revlog-centric API. (Except for
the fact that changegroup uses the same integer flags as revlog does
and there's minimal verification that the server's flags map to the
client's storage flags - but that's another problem.)
The last user of flags() was in verify.py and that code was just moved
into revlog.py and is accessed behind the verifyintegrity() file
storage API.
Since there are no more consumers, let's drop the proxy and remove
the method from the file storage interface.
This commit only drops the dedicated API for reading a single
revision's storage flags: we still support reading and writing flags
through the bulk data retrieval and add revision APIs. And since
changegroups encode revlog integer flags over the wire, we'll always
need to support flags at some level. The removal of individual storage
flags may be too premature. But since flags() is now unused, I'd like
to see how far we can get without that dedicated API - especially
since it uses revision numbers instead of nodes.
Differential Revision: https://phab.mercurial-scm.org/D4746
# 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,
pycompat,
revlog,
scmutil,
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
class verifier(object):
# The match argument is always None in hg core, but e.g. the narrowhg
# extension will pass in a matcher here.
def __init__(self, repo, match=None):
self.repo = repo.unfiltered()
self.ui = repo.ui
self.match = match or scmutil.matchall(repo)
self.badrevs = set()
self.errors = 0
self.warnings = 0
self.havecl = len(repo.changelog) > 0
self.havemf = len(repo.manifestlog.getstorage(b'')) > 0
self.revlogv1 = repo.changelog.version != revlog.REVLOGV0
self.lrugetctx = util.lrucachefunc(repo.__getitem__)
self.refersmf = False
self.fncachewarned = False
# developer config: verify.skipflags
self.skipflags = repo.ui.configint('verify', 'skipflags')
self.warnorphanstorefiles = True
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)
linkrev = "%d" % 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):
fmsg = pycompat.bytestr(inst)
if not fmsg:
fmsg = pycompat.byterepr(inst)
self.err(linkrev, "%s: %s" % (msg, fmsg), 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(pycompat.bytestr, 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(_("checked %d changesets with %d changes to %d files\n") %
(len(repo.changelog), filerevisions, totalfiles))
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
match = self.match
cl = repo.changelog
ui.status(_("checking changesets\n"))
mflinkrevs = {}
filelinkrevs = {}
seen = {}
self.checklog(cl, "changelog", 0)
progress = ui.makeprogress(_('checking'), unit=_('changesets'),
total=len(repo))
for i in repo:
progress.update(i)
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 match(f):
filelinkrevs.setdefault(_normpath(f), []).append(i)
except Exception as inst:
self.refersmf = True
self.exc(i, _("unpacking changeset %s") % short(n), inst)
progress.complete()
return mflinkrevs, filelinkrevs
def _verifymanifest(self, mflinkrevs, dir="", storefiles=None,
subdirprogress=None):
repo = self.repo
ui = self.ui
match = self.match
mfl = self.repo.manifestlog
mf = mfl.getstorage(dir)
if not dir:
self.ui.status(_("checking manifests\n"))
filenodes = {}
subdirnodes = {}
seen = {}
label = "manifest"
if dir:
label = dir
revlogfiles = mf.files()
storefiles.difference_update(revlogfiles)
if subdirprogress: # should be true since we're in a subdirectory
subdirprogress.increment()
if self.refersmf:
# Do not check manifest if there are only changelog entries with
# null manifests.
self.checklog(mf, label, 0)
progress = ui.makeprogress(_('checking'), unit=_('manifests'),
total=len(mf))
for i in mf:
if not dir:
progress.update(i)
n = mf.node(i)
lr = self.checkentry(mf, i, n, seen, mflinkrevs.get(n, []), label)
if n in mflinkrevs:
del mflinkrevs[n]
elif dir:
self.err(lr, _("%s not in parent-directory manifest") %
short(n), label)
else:
self.err(lr, _("%s not in changesets") % short(n), label)
try:
mfdelta = mfl.get(dir, n).readdelta(shallow=True)
for f, fn, fl in mfdelta.iterentries():
if not f:
self.err(lr, _("entry without name in manifest"))
elif f == "/dev/null": # ignore this in very old repos
continue
fullpath = dir + _normpath(f)
if fl == 't':
if not match.visitdir(fullpath):
continue
subdirnodes.setdefault(fullpath + '/', {}).setdefault(
fn, []).append(lr)
else:
if not match(fullpath):
continue
filenodes.setdefault(fullpath, {}).setdefault(fn, lr)
except Exception as inst:
self.exc(lr, _("reading delta %s") % short(n), inst, label)
if not dir:
progress.complete()
if self.havemf:
for c, m in sorted([(c, m) for m in mflinkrevs
for c in mflinkrevs[m]]):
if dir:
self.err(c, _("parent-directory manifest refers to unknown "
"revision %s") % short(m), label)
else:
self.err(c, _("changeset refers to unknown revision %s") %
short(m), label)
if not dir and subdirnodes:
self.ui.status(_("checking directory manifests\n"))
storefiles = set()
subdirs = set()
revlogv1 = self.revlogv1
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('meta/'):
storefiles.add(_normpath(f))
subdirs.add(os.path.dirname(f))
subdirprogress = ui.makeprogress(_('checking'), unit=_('manifests'),
total=len(subdirs))
for subdir, linkrevs in subdirnodes.iteritems():
subdirfilenodes = self._verifymanifest(linkrevs, subdir, storefiles,
subdirprogress)
for f, onefilenodes in subdirfilenodes.iteritems():
filenodes.setdefault(f, {}).update(onefilenodes)
if not dir and subdirnodes:
subdirprogress.complete()
if self.warnorphanstorefiles:
for f in sorted(storefiles):
self.warn(_("warning: orphan data file '%s'") % f)
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)
progress = ui.makeprogress(_('crosschecking'), total=total)
if self.havemf:
for f in sorted(filelinkrevs):
progress.increment()
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):
progress.increment()
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)
progress.complete()
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))
state = {
# TODO this assumes revlog storage for changelog.
'expectedversion': self.repo.changelog.version & 0xFFFF,
'skipflags': self.skipflags,
# experimental config: censor.policy
'erroroncensored': ui.config('censor', 'policy') == 'abort',
}
files = sorted(set(filenodes) | set(filelinkrevs))
revisions = 0
progress = ui.makeprogress(_('checking'), unit=_('files'),
total=len(files))
for i, f in enumerate(files):
progress.update(i, item=f)
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.StorageError as e:
self.err(lr, _("broken revlog! (%s)") % e, f)
continue
for ff in fl.files():
try:
storefiles.remove(ff)
except KeyError:
if self.warnorphanstorefiles:
self.warn(_(" warning: revlog '%s' not in fncache!") %
ff)
self.fncachewarned = True
if not len(fl) and (self.havecl or self.havemf):
self.err(lr, _("empty or missing %s") % f)
else:
# Guard against implementations not setting this.
state['skipread'] = set()
for problem in fl.verifyintegrity(state):
if problem.node is not None:
linkrev = fl.linkrev(fl.rev(problem.node))
else:
linkrev = None
if problem.warning:
self.warn(problem.warning)
elif problem.error:
self.err(linkrev if linkrev is not None else lr,
problem.error, f)
else:
raise error.ProgrammingError(
'problem instance does not set warning or error '
'attribute: %s' % problem.msg)
seen = {}
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]
if n in state['skipread']:
continue
# check renames
try:
# This requires resolving fulltext (at least on revlogs). We
# may want ``verifyintegrity()`` to pass a set of nodes with
# rename metadata as an optimization.
rp = fl.renamed(n)
if rp:
if lr is not None and ui.verbose:
ctx = lrugetctx(lr)
if not any(rp[0] in pctx for pctx in ctx.parents()):
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 = [(v, k) for k, v in filenodes[f].iteritems()]
for lr, node in sorted(fns):
self.err(lr, _("manifest refers to unknown revision %s") %
short(node), f)
progress.complete()
if self.warnorphanstorefiles:
for f in sorted(storefiles):
self.warn(_("warning: orphan data file '%s'") % f)
return len(files), revisions