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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 18:24:20 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 18:24:20 +0000 |
commit | 483eb2f56657e8e7f419ab1a4fab8dce9ade8609 (patch) | |
tree | e5d88d25d870d5dedacb6bbdbe2a966086a0a5cf /qa/workunits/fs/misc/filelock_deadlock.py | |
parent | Initial commit. (diff) | |
download | ceph-upstream.tar.xz ceph-upstream.zip |
Adding upstream version 14.2.21.upstream/14.2.21upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'qa/workunits/fs/misc/filelock_deadlock.py')
-rwxr-xr-x | qa/workunits/fs/misc/filelock_deadlock.py | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/qa/workunits/fs/misc/filelock_deadlock.py b/qa/workunits/fs/misc/filelock_deadlock.py new file mode 100755 index 00000000..3ebc9777 --- /dev/null +++ b/qa/workunits/fs/misc/filelock_deadlock.py @@ -0,0 +1,72 @@ +#!/usr/bin/python + +import errno +import fcntl +import os +import signal +import struct +import time + + +def handler(signum, frame): + pass + + +def lock_two(f1, f2): + lockdata = struct.pack('hhllhh', fcntl.F_WRLCK, 0, 0, 10, 0, 0) + fcntl.fcntl(f1, fcntl.F_SETLKW, lockdata) + time.sleep(10) + + # don't wait forever + signal.signal(signal.SIGALRM, handler) + signal.alarm(10) + exitcode = 0 + try: + fcntl.fcntl(f2, fcntl.F_SETLKW, lockdata) + except IOError as e: + if e.errno == errno.EDEADLK: + exitcode = 1 + elif e.errno == errno.EINTR: + exitcode = 2 + else: + exitcode = 3 + os._exit(exitcode) + + +def main(): + pid1 = os.fork() + if pid1 == 0: + f1 = open("testfile1", 'w') + f2 = open("testfile2", 'w') + lock_two(f1, f2) + + pid2 = os.fork() + if pid2 == 0: + f1 = open("testfile2", 'w') + f2 = open("testfile3", 'w') + lock_two(f1, f2) + + pid3 = os.fork() + if pid3 == 0: + f1 = open("testfile3", 'w') + f2 = open("testfile1", 'w') + lock_two(f1, f2) + + deadlk_count = 0 + i = 0 + while i < 3: + pid, status = os.wait() + exitcode = status >> 8 + if exitcode == 1: + deadlk_count += 1 + elif exitcode != 0: + raise RuntimeError("unexpect exit code of child") + i += 1 + + if deadlk_count != 1: + raise RuntimeError("unexpect count of EDEADLK") + + print('ok') + + +main() |