mode of mkdir incorrect after setacl.

[zhoucheng361]

What happened:

root@bench-01:~/juicefs# cat .github/scripts/hypo/acl_test.py
    def test_acl_5000(self):
        state = JuicefsMachine()
        v1 = state.init_folders()
        v3 = state.set_acl(default=True, entry=v1, group=v1, group_perm=set(), logical=False, mask=set(), not_recalc_mask=False, other_perm=set(), physical=False, recalc_mask=False, recursive=False, set_mask=False, sudo_user='root', user=v1, user_perm={'r'})
        state.mkdir(mode=0, parent=v1, subdir='aaaa', umask=0, user='root')
        state.teardown()

root@bench-01:~/juicefs# python3 .github/scripts/hypo/acl_test.py -k test_acl_5000
setup_logger ./log1
setup_logger ./log2
__init__
duration is 0.026491165161132812
2024-04-08 17:41:30,708 - INFO - run_cmd: sudo -u root setfacl -d      -m u::r,g::-,o::- /tmp/fsrand/
run_cmd:getfacl /tmp/fsrand/
2024-04-08 17:41:30,714 - INFO - do_set_acl /tmp/fsrand/ with u::r,g::-,o::- succeed
2024-04-08 17:41:30,714 - INFO - run_cmd: sudo -u root setfacl -d      -m u::r,g::-,o::- /tmp/jfs/fsrand/
run_cmd:getfacl /tmp/jfs/fsrand/
2024-04-08 17:41:30,720 - INFO - do_set_acl /tmp/jfs/fsrand/ with u::r,g::-,o::- succeed
2024-04-08 17:41:30,720 - INFO - do_mkdir /tmp/fsrand/aaaa with mode 0o0 succeed
2024-04-08 17:41:30,720 - INFO - do_mkdir /tmp/jfs/fsrand/aaaa with mode 0o0 succeed
F
======================================================================
FAIL: test_acl_5000 (__main__.TestFsrand2)
----------------------------------------------------------------------
Traceback (most recent call last):
  File ".github/scripts/hypo/acl_test.py", line 123, in test_acl_5000
    state.mkdir(mode=0, parent=v1, subdir='aaaa', umask=0, user='root')
  File "/root/juicefs/.github/scripts/hypo/fsrand2.py", line 315, in mkdir
    parent = Folders.filter(lambda x: x != multiple()),
  File "/root/hypothesis/hypothesis-python/src/hypothesis/stateful.py", line 681, in rule_wrapper
    return f(*args, **kwargs)
  File "/root/juicefs/.github/scripts/hypo/fsrand2.py", line 315, in mkdir
    parent = Folders.filter(lambda x: x != multiple()),
  File "/root/hypothesis/hypothesis-python/src/hypothesis/stateful.py", line 802, in precondition_wrapper
    return f(*args, **kwargs)
  File "/root/juicefs/.github/scripts/hypo/fsrand2.py", line 326, in mkdir
    assert self.equal(result1, result2), f'\033[31mmkdir:\nresult1 is {result1}\nresult2 is {result2}\033[0m'
AssertionError: mkdir:
result1 is (0, 0, '0o40000')
result2 is (0, 0, '0o40400')

----------------------------------------------------------------------
Ran 1 test in 0.028s

FAILED (failures=1)

What you expected to happen:

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?

Environment:

• JuiceFS version (use juicefs --version) or Hadoop Java SDK version:
• Cloud provider or hardware configuration running JuiceFS:
• OS (e.g cat /etc/os-release):
• Kernel (e.g. uname -a):
• Object storage (cloud provider and region, or self maintained):
• Metadata engine info (version, cloud provider managed or self maintained):
• Network connectivity (JuiceFS to metadata engine, JuiceFS to object storage):
• Others: