[pynfs PATCH 1/4] nfs4.1: add some reboot tests

Scott Mayhew
2019-03-14T21:12:13Z

REBT2a, REBT2b, and REBT2c test recovery with multiple clients following
a server reboot.

Signed-off-by: Scott Mayhew <smayhew@redhat.com>
---
nfs4.1/server41tests/st_reboot.py | 151 +++++++++++++++++++++++++++++-
1 file changed, 147 insertions(+), 4 deletions(-)

diff --git a/nfs4.1/server41tests/st_reboot.py b/nfs4.1/server41tests/st_reboot.py
index b852ded..0216127 100644
--- a/nfs4.1/server41tests/st_reboot.py
+++ b/nfs4.1/server41tests/st_reboot.py
@@ -1,25 +1,33 @@
from xdrdef.nfs4_const import *
from xdrdef.nfs4_type import *
-from .environment import check, fail, create_file, open_file, create_confirm
+from .environment import check, fail, create_file, open_file, create_confirm, close_file
import sys
import os
-import nfs4lib
+import time
+import logging
import nfs_ops
op = nfs_ops.NFS4ops()
from rpc import RPCTimeout

# NOTE - reboot tests are NOT part of the standard test suite

+log = logging.getLogger("test.env")
+
def _getleasetime(sess):
res = sess.compound([op.putrootfh(), op.getattr(1 << FATTR4_LEASE_TIME)])
return res.resarray[-1].obj_attributes[FATTR4_LEASE_TIME]

-def _waitForReboot(c, sess, env):
+def _waitForReboot(env):
env.serverhelper("reboot")
# Wait until the server is back up.
# The following blocks until it gets a response,
# which happens when the server comes back up.
env.c1.c1 = env.c1.connect(env.c1.server_address)
+ # Go ahead and whack the cached session and client ids now
+ # to avoid errors in Environment.finish().
+ env.c1.sessions = {}
+ env.c1.clients = {}
+ return int(time.time())

def create_session(c, cred=None, flags=0):
"""Send a simple CREATE_SESSION"""
@@ -51,7 +59,7 @@ def testRebootValid(t, env):
reclaim_complete(sess)
fh, stateid = create_confirm(sess, owner)
sleeptime = 5 + _getleasetime(sess)
- _waitForReboot(c, sess, env)
+ _waitForReboot(env)
try:
res = create_session(c)
check(res, NFS4ERR_STALE_CLIENTID, "Reclaim using old clientid")
@@ -67,3 +75,138 @@ def testRebootValid(t, env):
reclaim_complete(sess)
finally:
env.sleep(sleeptime, "Waiting for grace period to end")
+
+class State(object):
+ def __init__(self, name, owner, c, sess, fh):
+ self.name = name
+ self.owner = owner
+ self.c = c
+ self.sess = sess
+ self.fh = fh
+
+def doTestOneClientGrace(t, env, state):
+ res = state.sess.compound([])
+ check(res, NFS4ERR_BADSESSION, "Bare sequence after reboot")
+ res = create_session(state.c)
+ check(res, NFS4ERR_STALE_CLIENTID, "Reclaim using old clientid")
+ c = env.c1.new_client(state.name)
+ state.c = c
+ sess = c.create_session()
+ state.sess = sess
+ lease_time = _getleasetime(sess)
+ res = open_file(sess, state.owner, path=state.fh,
+ claim_type=CLAIM_PREVIOUS,
+ access=OPEN4_SHARE_ACCESS_BOTH,
+ deny=OPEN4_SHARE_DENY_NONE,
+ deleg_type=OPEN_DELEGATE_NONE)
+ check(res, msg="Reclaim using newly created clientid")
+ fh = res.resarray[-1].object
+ stateid = res.resarray[-2].stateid
+ reclaim_complete(sess)
+ close_file(sess, fh, stateid=stateid)
+ res = open_file(sess, state.owner, claim_type=CLAIM_NULL,
+ access=OPEN4_SHARE_ACCESS_BOTH,
+ deny=OPEN4_SHARE_DENY_NONE,
+ deleg_type=OPEN_DELEGATE_NONE)
+ check(res, NFS4ERR_GRACE, "New open during grace")
+ return lease_time
+
+def doTestOneClientNoGrace(t, env, state):
+ res = open_file(state.sess, state.owner, claim_type=CLAIM_NULL,
+ access=OPEN4_SHARE_ACCESS_BOTH,
+ deny=OPEN4_SHARE_DENY_NONE,
+ deleg_type=OPEN_DELEGATE_NONE)
+ if (res.status == NFS4ERR_GRACE):
+ return res
+ check(res, msg="New open after all clients done reclaiming")
+ fh = res.resarray[-1].object
+ stateid = res.resarray[-2].stateid
+ close_file(state.sess, fh, stateid=stateid)
+ return res
+
+# The server may have lifted the grace period early, but it's not obligated.
+# Keep looping until all the clients have done a normal open. If the server
+# didn't lift the grace period early we don't want to fail the test, but we
+# do want to log a message.
+def doTestAllClientsNoGrace(t, env, states):
+ all_done = False
+ warn_grace = False
+ start_time = int(time.time())
+ ok_time = 0
+ while not all_done:
+ all_done = True
+ for state in states:
+ res = doTestOneClientNoGrace(t, env, state)
+ if res.status == NFS4ERR_GRACE:
+ warn_grace = True
+ all_done = False
+ elif not ok_time:
+ ok_time = int(time.time())
+ if not all_done:
+ time.sleep(1)
+ if warn_grace:
+ lift_time = ok_time - start_time
+ log.warn("server took approximately %d seconds to lift grace "
+ "after all clients reclaimed" % lift_time)
+
+def doTestRebootWithNClients(t, env, n=10):
+ boot_time = int(time.time())
+ lease_time = 90
+ states = []
+ block = env.c1.new_client_session("%s_block" % env.testname(t))
+ for i in range(n):
+ name = "%s_client_%i" % (env.testname(t), i)
+ owner = "owner_%s" % name
+ c = env.c1.new_client(name)
+ sess = c.create_session()
+ reclaim_complete(sess)
+ fh, stateid = create_confirm(sess, owner)
+ states.append(State(name, owner, c, sess, fh))
+ lease_time = _getleasetime(sess)
+ boot_time = _waitForReboot(env)
+
+ try:
+ for i in range(n):
+ lease_time = doTestOneClientGrace(t, env, states[i])
+
+ # At this point, all clients should have recovered except for 'block'.
+ # Recover that one now.
+ block = env.c1.new_client_session("%s_block" % env.testname(t))
+
+ # The server may have lifted the grace period early. Test it.
+ doTestAllClientsNoGrace(t, env, states)
+
+ # If the test went normally, then the grace period should have already
+ # ended. If we got some unexpected error, then wait a bit for the server
+ # to expire the clients so cleanup can proceed more smoothly.
+ except:
+ grace_end_time = boot_time + lease_time + 5
+ now = int(time.time())
+ if now < grace_end_time:
+ sleep_time = grace_end_time - now
+ env.sleep(sleep_time, "Waiting for grace period to end")
+ raise
+
+def testRebootWithManyClients(t, env):
+ """Reboot with many clients
+
+ FLAGS: reboot
+ CODE: REBT2a
+ """
+ return doTestRebootWithNClients(t, env)
+
+def testRebootWithManyManyClients(t, env):
+ """Reboot with many many clients
+
+ FLAGS: reboot
+ CODE: REBT2b
+ """
+ return doTestRebootWithNClients(t, env, 100)
+
+def testRebootWithManyManyManyClients(t, env):
+ """Reboot with many many many clients
+
+ FLAGS: reboot
+ CODE: REBT2c
+ """
+ return doTestRebootWithNClients(t, env, 1000)
--
2.17.2