Differential D10335 Diff 66436 contrib/lib9p/pytest/client.py

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contrib/lib9p/pytest/client.py

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				#! /usr/bin/env python

				"""
				Run various tests, as a client.
				"""

				from __future__ import print_function

				import argparse
				try:
				import ConfigParser as configparser
				except ImportError:
				import configparser
				import functools
				import logging
				import os
				import socket
				import struct
				import sys
				import time
				import traceback

				import p9conn
				import protocol

				LocalError = p9conn.LocalError
				RemoteError = p9conn.RemoteError
				TEError = p9conn.TEError

				class TestState(object):
				def __init__(self):
				self.config = None
				self.logger = None
				self.successes = 0
				self.skips = 0
				self.failures = 0
				self.exceptions = 0
				self.clnt_tab = {}
				self.mkclient = None
				self.stop = False
				self.gid = 0

				def ccc(self, cid=None):
				"""
				Connect or reconnect as client (ccc = check and connect client).

				If caller provides a cid (client ID) we check that specific
				client. Otherwise the default ID ('base') is used.
				In any case we return the now-connected client, plus the
				attachment (session info) if any.
				"""
				if cid is None:
				cid = 'base'
				pair = self.clnt_tab.get(cid)
				if pair is None:
				clnt = self.mkclient()
				pair = [clnt, None]
				self.clnt_tab[cid] = pair
				else:
				clnt = pair[0]
				if not clnt.is_connected():
				clnt.connect()
				return pair

				def dcc(self, cid=None):
				"""
				Disconnect client (disconnect checked client). If no specific
				client ID is provided, this disconnects ALL checked clients!
				"""
				if cid is None:
				for cid in list(self.clnt_tab.keys()):
				self.dcc(cid)
				pair = self.clnt_tab.get(cid)
				if pair is not None:
				clnt = pair[0]
				if clnt.is_connected():
				clnt.shutdown()
				del self.clnt_tab[cid]

				def ccs(self, cid=None):
				"""
				Like ccc, but establish a session as well, by setting up
				the uname/n_uname.

				Return the client instance (only).
				"""
				pair = self.ccc(cid)
				clnt = pair[0]
				if pair[1] is None:
				# No session yet - establish one. Note, this may fail.
				section = None if cid is None else ('client-' + cid)
				aname = getconf(self.config, section, 'aname', '')
				uname = getconf(self.config, section, 'uname', '')
				if clnt.proto > protocol.plain:
				n_uname = getint(self.config, section, 'n_uname', 1001)
				else:
				n_uname = None
				clnt.attach(afid=None, aname=aname, uname=uname, n_uname=n_uname)
				pair[1] = (aname, uname, n_uname)
				return clnt

				def getconf(conf, section, name, default=None, rtype=str):
				"""
				Get configuration item for given section, or for "client" if
				there is no entry for that particular section (or if section
				is None).

				This lets us get specific values for specific tests or
				groups ([foo] name=value), falling back to general values
				([client] name=value).

				The type of the returned value <rtype> can be str, int, bool,
				or float. The default is str (and see getconfint, getconfbool,
				getconffloat below).

				A default value may be supplied; if it is, that's the default
				return value (this default should have the right type). If
				no default is supplied, a missing value is an error.
				"""
				try:
				# note: conf.get(None, 'foo') raises NoSectionError
				where = section
				result = conf.get(where, name)
				except (configparser.NoSectionError, configparser.NoOptionError):
				try:
				where = 'client'
				result = conf.get(where, name)
				except configparser.NoSectionError:
				sys.exit('no [{0}] section in configuration!'.format(where))
				except configparser.NoOptionError:
				if default is not None:
				return default
				if section is not None:
				where = '[{0}] or [{1}]'.format(section, where)
				else:
				where = '[{0}]'.format(where)
				raise LocalError('need {0}=value in {1}'.format(name, where))
				where = '[{0}]'.format(where)
				if rtype is str:
				return result
				if rtype is int:
				return int(result)
				if rtype is float:
				return float(result)
				if rtype is bool:
				if result.lower() in ('1', 't', 'true', 'y', 'yes'):
				return True
				if result.lower() in ('0', 'f', 'false', 'n', 'no'):
				return False
				raise ValueError('{0} {1}={2}: invalid boolean'.format(where, name,
				result))
				raise ValueError('{0} {1}={2}: internal error: bad result type '
				'{3!r}'.format(where, name, result, rtype))

				def getint(conf, section, name, default=None):
				"get integer config item"
				return getconf(conf, section, name, default, int)

				def getfloat(conf, section, name, default=None):
				"get float config item"
				return getconf(conf, section, name, default, float)

				def getbool(conf, section, name, default=None):
				"get boolean config item"
				return getconf(conf, section, name, default, bool)

				def pluralize(n, singular, plural):
				"return singular or plural based on value of n"
				return plural if n != 1 else singular

				class TCDone(Exception):
				"used in succ/fail/skip - skips rest of testcase with"
				pass

				class TestCase(object):
				"""
				Start a test case. Most callers must then do a ccs() to connect.

				A failed test will generally disconnect from the server; a
				new ccs() will reconnect, if the server is still alive.
				"""
				def __init__(self, name, tstate):
				self.name = name
				self.status = None
				self.detail = None
				self.tstate = tstate
				self._shutdown = None
				self._autoclunk = None
				self._acconn = None

				def auto_disconnect(self, conn):
				self._shutdown = conn

				def succ(self, detail=None):
				"set success status"
				self.status = 'SUCC'
				self.detail = detail
				raise TCDone()

				def fail(self, detail):
				"set failure status"
				self.status = 'FAIL'
				self.detail = detail
				raise TCDone()

				def skip(self, detail=None):
				"set skip status"
				self.status = 'SKIP'
				self.detail = detail
				raise TCDone()

				def autoclunk(self, fid):
				"mark fid to be closed/clunked on test exit"
				if self._acconn is None:
				raise ValueError('autoclunk: no _acconn')
				self._autoclunk.append(fid)

				def trace(self, msg, args, *kwargs):
				"add tracing info to log-file output"
				level = kwargs.pop('level', logging.INFO)
				self.tstate.logger.log(level, ' ' + msg, args, *kwargs)

				def ccs(self):
				"call tstate ccs, turn socket.error connect failure into test fail"
				try:
				self.detail = 'connecting'
				ret = self.tstate.ccs()
				self.detail = None
				self._acconn = ret
				return ret
				except socket.error as err:
				self.fail(str(err))

				def __enter__(self):
				self.tstate.logger.log(logging.DEBUG, 'ENTER: %s', self.name)
				self._autoclunk = []
				return self

				def __exit__(self, exc_type, exc_val, exc_tb):
				tstate = self.tstate
				eat_exc = False
				tb_detail = None
				if exc_type is TCDone:
				# we exited with succ, fail, or skip
				eat_exc = True
				exc_type = None
				if exc_type is not None:
				if self.status is None:
				self.status = 'EXCP'
				else:
				self.status += ' EXC'
				if exc_type == TEError:
				# timeout/eof - best guess is that we crashed the server!
				eat_exc = True
				tb_detail = ['timeout or EOF']
				elif exc_type in (socket.error, RemoteError, LocalError):
				eat_exc = True
				tb_detail = traceback.format_exception(exc_type, exc_val,
				exc_tb)
				level = logging.ERROR
				tstate.failures += 1
				tstate.exceptions += 1
				else:
				if self.status is None:
				self.status = 'SUCC'
				if self.status == 'SUCC':
				level = logging.INFO
				tstate.successes += 1
				elif self.status == 'SKIP':
				level = logging.INFO
				tstate.skips += 1
				else:
				level = logging.ERROR
				tstate.failures += 1
				tstate.logger.log(level, '%s: %s', self.status, self.name)
				if self.detail:
				tstate.logger.log(level, ' detail: %s', self.detail)
				if tb_detail:
				for line in tb_detail:
				tstate.logger.log(level, ' %s', line.rstrip())
				for fid in self._autoclunk:
				self._acconn.clunk(fid, ignore_error=True)
				if self._shutdown:
				self._shutdown.shutdown()
				return eat_exc

				def main():
				"the usual main"
				parser = argparse.ArgumentParser(description='run tests against a server')

				parser.add_argument('-c', '--config',
				action='append',
				help='specify additional file(s) to read (beyond testconf.ini)')

				args = parser.parse_args()
				config = configparser.SafeConfigParser()
				# use case sensitive keys
				config.optionxform = str

				try:
				with open('testconf.ini', 'r') as stream:
				config.readfp(stream)
				except (OSError, IOError) as err:
				sys.exit(str(err))
				if args.config:
				ok = config.read(args.config)
				failed = set(ok) - set(args.config)
				if len(failed):
				nfailed = len(failed)
				word = 'files' if nfailed > 1 else 'file'
				failed = ', '.join(failed)
				print('failed to read {0} {1}: {2}'.format(nfailed, word, failed))
				sys.exit(1)

				logging.basicConfig(level=config.get('client', 'loglevel').upper())
				logger = logging.getLogger(__name__)
				tstate = TestState()
				tstate.logger = logger
				tstate.config = config

				server = config.get('client', 'server')
				port = config.getint('client', 'port')
				proto = config.get('client', 'protocol')
				may_downgrade = config.getboolean('client', 'may_downgrade')
				timeout = config.getfloat('client', 'timeout')

				tstate.stop = True # unless overwritten below
				with TestCase('send bad packet', tstate) as tc:
				tc.detail = 'connecting to {0}:{1}'.format(server, port)
				try:
				conn = p9conn.P9SockIO(logger, server=server, port=port)
				except socket.error as err:
				tc.fail('cannot connect at all (server down?)')
				tc.auto_disconnect(conn)
				tc.detail = None
				pkt = struct.pack('<I', 256);
				conn.write(pkt)
				# ignore reply if any, we're just trying to trip the server
				tstate.stop = False
				tc.succ()

				if not tstate.stop:
				tstate.mkclient = functools.partial(p9conn.P9Client, logger,
				timeout, proto, may_downgrade,
				server=server, port=port)
				tstate.stop = True
				with TestCase('send bad Tversion', tstate) as tc:
				try:
				clnt = tstate.mkclient()
				except socket.error as err:
				tc.fail('can no longer connect, did bad pkt crash server?')
				tc.auto_disconnect(clnt)
				clnt.set_monkey('version', b'wrongo, fishbreath!')
				tc.detail = 'connecting'
				try:
				clnt.connect()
				except RemoteError as err:
				tstate.stop = False
				tc.succ(err.args[0])
				tc.fail('server accepted a bad Tversion')

				if not tstate.stop:
				# All NUL characters in strings are invalid.
				with TestCase('send illegal NUL in Tversion', tstate) as tc:
				clnt = tstate.mkclient()
				tc.auto_disconnect(clnt)
				clnt.set_monkey('version', b'9P2000\0')
				# Forcibly allow downgrade so that Tversion
				# succeeds if they ignore the \0.
				clnt.may_downgrade = True
				tc.detail = 'connecting'
				try:
				clnt.connect()
				except (TEError, RemoteError) as err:
				tc.succ(err.args[0])
				tc.fail('server accepted NUL in Tversion')

				if not tstate.stop:
				with TestCase('connect normally', tstate) as tc:
				tc.detail = 'connecting'
				try:
				tstate.ccc()
				except RemoteError as err:
				# can't test any further, but this might be success
				tstate.stop = True
				if 'they only support version' in err.args[0]:
				tc.succ(err.args[0])
				tc.fail(err.args[0])
				tc.succ()

				if not tstate.stop:
				with TestCase('attach with bad afid', tstate) as tc:
				clnt = tstate.ccc()[0]
				section = 'attach-with-bad-afid'
				aname = getconf(tstate.config, section, 'aname', '')
				uname = getconf(tstate.config, section, 'uname', '')
				if clnt.proto > protocol.plain:
				n_uname = getint(tstate.config, section, 'n_uname', 1001)
				else:
				n_uname = None
				try:
				clnt.attach(afid=42, aname=aname, uname=uname, n_uname=n_uname)
				except RemoteError as err:
				tc.succ(err.args[0])
				tc.dcc()
				tc.fail('bad attach afid not rejected')

				try:
				if not tstate.stop:
				# Various Linux tests need gids. Just get them for everyone.
				tstate.gid = getint(tstate.config, 'client', 'gid', 0)
				more_test_cases(tstate)
				finally:
				tstate.dcc()

				n_tests = tstate.successes + tstate.failures
				print('summary:')
				if tstate.successes:
				print('{0}/{1} tests succeeded'.format(tstate.successes, n_tests))
				if tstate.failures:
				print('{0}/{1} tests failed'.format(tstate.failures, n_tests))
				if tstate.skips:
				print('{0} {1} skipped'.format(tstate.skips,
				pluralize(tstate.skips,
				'test', 'tests')))
				if tstate.exceptions:
				print('{0} {1} occurred'.format(tstate.exceptions,
				pluralize(tstate.exceptions,
				'exception', 'exceptions')))
				if tstate.stop:
				print('tests stopped early')
				return 1 if tstate.stop or tstate.exceptions or tstate.failures else 0

				def more_test_cases(tstate):
				"run cases that can only proceed if connecting works at all"
				with TestCase('attach normally', tstate) as tc:
				tc.ccs()
				tc.succ()
				if tstate.stop:
				return

				# Empty string is not technically illegal. It's not clear
				# whether it should be accepted or rejected. However, it
				# used to crash the server entirely, so it's a desirable
				# test case.
				with TestCase('empty string in Twalk request', tstate) as tc:
				clnt = tc.ccs()
				try:
				fid, qid = clnt.lookup(clnt.rootfid, [b''])
				except RemoteError as err:
				tc.succ(err.args[0])
				clnt.clunk(fid)
				tc.succ('note: empty Twalk component name not rejected')

				# Name components may not contain /
				with TestCase('embedded / in lookup component name', tstate) as tc:
				clnt = tc.ccs()
				try:
				fid, qid = clnt.lookup(clnt.rootfid, [b'/'])
				tc.autoclunk(fid)
				except RemoteError as err:
				tc.succ(err.args[0])
				tc.fail('/ in lookup component name not rejected')

				# Proceed from a clean tree. As a side effect, this also tests
				# either the old style readdir (read() on a directory fid) or
				# the dot-L readdir().
				#
				# The test case will fail if we don't have permission to remove
				# some file(s).
				with TestCase('clean up tree (readdir+remove)', tstate) as tc:
				clnt = tc.ccs()
				fset = clnt.uxreaddir(b'/')
				fset = [i for i in fset if i != '.' and i != '..']
				tc.trace("what's there initially: {0!r}".format(fset))
				try:
				clnt.uxremove(b'/', force=False, recurse=True)
				except RemoteError as err:
				tc.trace('failed to read or clean up tree', level=logging.ERROR)
				tc.trace('this might be a permissions error', level=logging.ERROR)
				tstate.stop = True
				tc.fail(str(err))
				fset = clnt.uxreaddir(b'/')
				fset = [i for i in fset if i != '.' and i != '..']
				tc.trace("what's left after removing everything: {0!r}".format(fset))
				if fset:
				tstate.stop = True
				tc.trace('note: could be a permissions error', level=logging.ERROR)
				tc.fail('/ not empty after removing all: {0!r}'.format(fset))
				tc.succ()
				if tstate.stop:
				return

				# Name supplied to create, mkdir, etc, may not contain /.
				# Note that this test may fail for the wrong reason if /dir
				# itself does not already exist, so first let's make /dir.
				only_dotl = getbool(tstate.config, 'client', 'only_dotl', False)
				with TestCase('mkdir', tstate) as tc:
				clnt = tc.ccs()
				if only_dotl and not clnt.supports(protocol.td.Tmkdir):
				tc.skip('cannot test dot-L mkdir on {0}'.format(clnt.proto))
				try:
				fid, qid = clnt.uxlookup(b'/dir', None)
				tc.autoclunk(fid)
				tstate.stop = True
				tc.fail('found existing /dir after cleaning tree')
				except RemoteError as err:
				# we'll just assume it's "no such file or directory"
				pass
				if only_dotl:
				qid = clnt.mkdir(clnt.rootfid, b'dir', 0o777, tstate.gid)
				else:
				qid, _ = clnt.create(clnt.rootfid, b'dir',
				protocol.td.DMDIR \| 0o777,
				protocol.td.OREAD)
				if qid.type != protocol.td.QTDIR:
				tstate.stop = True
				tc.fail('creating /dir: result is not a directory')
				tc.trace('now attempting to create /dir/sub the wrong way')
				try:
				if only_dotl:
				qid = clnt.mkdir(clnt.rootfid, b'dir/sub', 0o777, tstate.gid)
				else:
				qid, _ = clnt.create(clnt.rootfid, b'dir/sub',
				protocol.td.DMDIR \| 0o777,
				protocol.td.OREAD)
				# it's not clear what happened on the server at this point!
				tc.trace("creating dir/sub (with embedded '/') should have "
				'failed but did not')
				tstate.stop = True
				fset = clnt.uxreaddir(b'/dir')
				if 'sub' in fset:
				tc.trace('(found our dir/sub detritus)')
				clnt.uxremove(b'dir/sub', force=True)
				fset = clnt.uxreaddir(b'/dir')
				if 'sub' not in fset:
				tc.trace('(successfully removed our dir/sub detritus)')
				tstate.stop = False
				tc.fail('created dir/sub as single directory with embedded slash')
				except RemoteError as err:
				# we'll just assume it's the right kind of error
				tc.trace('invalid path dir/sub failed with: %s', str(err))
				tc.succ('embedded slash in mkdir correctly refused')
				if tstate.stop:
				return

				with TestCase('getattr/setattr', tstate) as tc:
				# This test is not really thorough enough, need to test
				# all combinations of settings. Should also test that
				# old values are restored on failure, although it is not
				# clear how to trigger failures.
				clnt = tc.ccs()
				if not clnt.supports(protocol.td.Tgetattr):
				tc.skip('%s does not support Tgetattr', clnt)
				fid, _, _, _ = clnt.uxopen(b'/dir/file', os.O_CREAT \| os.O_RDWR, 0o666,
				gid=tstate.gid)
				tc.autoclunk(fid)
				written = clnt.write(fid, 0, 'bytes\n')
				if written != 6:
				tc.trace('expected to write 6 bytes, actually wrote %d', written,
				level=logging.WARN)
				attrs = clnt.Tgetattr(fid)
				#tc.trace('getattr: after write, before setattr: got %s', attrs)
				if attrs.size != written:
				tc.fail('getattr: expected size=%d, got size=%d',
				written, attrs.size)
				# now truncate, set mtime to (3,14), and check result
				set_time_to = p9conn.Timespec(sec=0, nsec=140000000)
				clnt.Tsetattr(fid, size=0, mtime=set_time_to)
				attrs = clnt.Tgetattr(fid)
				#tc.trace('getattr: after setattr: got %s', attrs)
				if attrs.mtime.sec != set_time_to.sec or attrs.size != 0:
				tc.fail('setattr: expected to get back mtime.sec={0}, size=0; '
				'got mtime.sec={1}, size='
				'{1}'.format(set_time_to.sec, attrs.mtime.sec, attrs.size))
				# nsec is not as stable but let's check
				if attrs.mtime.nsec != set_time_to.nsec:
				tc.trace('setattr: expected to get back mtime_nsec=%d; '
				'got %d', set_time_to.nsec, mtime_nsec)
				tc.succ('able to set and see size and mtime')

				# this test should be much later, but we know the current
				# server is broken...
				with TestCase('rename adjusts other fids', tstate) as tc:
				clnt = tc.ccs()
				dirfid, _ = clnt.uxlookup(b'/dir')
				tc.autoclunk(dirfid)
				clnt.uxmkdir(b'd1', 0o777, tstate.gid, startdir=dirfid)
				clnt.uxmkdir(b'd1/sub', 0o777, tstate.gid, startdir=dirfid)
				d1fid, _ = clnt.uxlookup(b'd1', dirfid)
				tc.autoclunk(d1fid)
				subfid, _ = clnt.uxlookup(b'sub', d1fid)
				tc.autoclunk(subfid)
				fid, _, _, _ = clnt.uxopen(b'file', os.O_CREAT \| os.O_RDWR,
				0o666, startdir=subfid, gid=tstate.gid)
				tc.autoclunk(fid)
				written = clnt.write(fid, 0, 'filedata\n')
				if written != 9:
				tc.trace('expected to write 9 bytes, actually wrote %d', written,
				level=logging.WARN)
				# Now if we rename /dir/d1 to /dir/d2, the fids for both
				# sub/file and sub itself should still be usable. This
				# holds for both Trename (Linux only) and Twstat based
				# rename ops.
				#
				# Note that some servers may cache some number of files and/or
				# diretories held open, so we should open many fids to wipe
				# out the cache (XXX notyet).
				if clnt.supports(protocol.td.Trename):
				clnt.rename(d1fid, dirfid, name=b'd2')
				else:
				clnt.wstat(d1fid, name=b'd2')
				try:
				rofid, _, _, _ = clnt.uxopen(b'file', os.O_RDONLY, startdir=subfid)
				clnt.clunk(rofid)
				except RemoteError as err:
				tc.fail('open file in renamed dir/d2/sub: {0}'.format(err))
				tc.succ()

				# Even if xattrwalk is supported by the protocol, it's optional
				# on the server.
				with TestCase('xattrwalk', tstate) as tc:
				clnt = tc.ccs()
				if not clnt.supports(protocol.td.Txattrwalk):
				tc.skip('{0} does not support Txattrwalk'.format(clnt))
				dirfid, _ = clnt.uxlookup(b'/dir')
				tc.autoclunk(dirfid)
				try:
				# need better tests...
				attrfid, size = clnt.xattrwalk(dirfid)
				tc.autoclunk(attrfid)
				data = clnt.read(attrfid, 0, size)
				tc.trace('xattrwalk with no name: data=%r', data)
				tc.succ('xattrwalk size={0} datalen={1}'.format(size, len(data)))
				except RemoteError as err:
				tc.trace('xattrwalk on /dir: {0}'.format(err))
				tc.succ('xattrwalk apparently not implemented')

				if __name__ == '__main__':
				try:
				sys.exit(main())
				except KeyboardInterrupt:
				sys.exit('\nInterrupted')