src/: s/Mutex/ceph::mutex/

[tchaikov]

• s/Mutex/ceph::mutex/
• s/Cond/ceph::condition_variable/
• replace vector<mutex_pointer> with ceph::containers::tiny_vector<>
• clean up the commits a little bit.
• remove the "mds: execute PurgeQueue on_error handler in finisher" commits once mds: execute PurgeQueue on_error handler in finisher #29064 is merged
• run rados qa suite against this change.
• run rbd qa suite against this change

[batrick]

\o/

[tchaikov]

jenkins, retest this please

[adamemerson]

At some point it might be better just to use replace all our uses of Timer.cc with ceph_timer.h, since it already uses the new concurrency, time, functions, etc,

[tchaikov]

yeah, we could make that change in another PR. i think we could even deprecate utime in future, and just use it as an ondisk/wire format.

[cbodley]

note that conversion from SafeTimer to ceph::timer isn't trivial in cases that rely on the "Safe" part

[tchaikov]

• http://pulpito.ceph.com/kchai-2019-07-31_12:12:32-rados-wip-ceph-mutex-kefu-distro-basic-mira/

• http://pulpito.ceph.com/kchai-2019-08-03_10:59:16-rados-wip-ceph-mutex-kefu-distro-basic-smithi/

• http://pulpito.ceph.com/kchai-2019-08-02_17:07:06-rados-wip-ceph-mutex-kefu-distro-basic-mira/

• http://pulpito.ceph.com/kchai-2019-07-31_04:06:21-rbd-wip-ceph-mutex-kefu-distro-basic-smithi/

• http://pulpito.ceph.com/kchai-2019-08-02_16:08:17-rbd-wip-ceph-mutex-kefu-distro-basic-smithi/

• http://pulpito.ceph.com/kchai-2019-08-03_06:12:33-rbd-wip-ceph-mutex-kefu-distro-basic-mira/

i reviewed the failures. none of them is related to the mutex/locking/condition_variable.

[wjwithagen]

@tchaikov
Clang complains:

/home/jenkins/workspace/ceph-master/src/osdc/ObjectCacher.cc:1848:22: error: no viable constructor or deduction guide for deduction of template arguments of 'unique_lock'
    std::unique_lock l{lock, std:adopt_lock};

Likely due to a missing :: ??

[wjwithagen]

#29472

[wjwithagen]

@tchaikov
This changeset also causes:

/home/jenkins/workspace/ceph-master/src/tools/rbd_ggate/Server.cc:36:14: error: no member named 'WaitInterval' in 'ceph::condition_variable_debug'
      m_cond.WaitInterval(m_lock, utime_t(1, 0));
      ~~~~~~ ^
/home/jenkins/workspace/ceph-master/src/tools/rbd_ggate/Server.cc:82:10: error: no member named 'Signal' in 'ceph::condition_variable_debug'
  m_cond.Signal();
  ~~~~~~ ^
/home/jenkins/workspace/ceph-master/src/tools/rbd_ggate/Server.cc:89:75: error: expected ';' after return statement
  m_cond.wait(locker, [this] { return !m_io_finished.empty() || m_stopping});
                                                                          ^
                                                                          ;
/home/jenkins/workspace/ceph-master/src/tools/rbd_ggate/Server.cc:109:12: error: no member named 'Wait' in 'ceph::condition_variable_debug'
    m_cond.Wait(m_lock);
    ~~~~~~ ^

Have been trying all kinds of things but I keep getting mismatching function signatures...
Suggestions?

[tchaikov]

#29474