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2013-03-02tevent: change version to 0.9.18Stefan Metzmacher2-1/+84
This release contains a lot of fixes: - Adding new timer events is now faster, if there's a large number of timer events. - sigprocmask does not work on FreeBSD to stop further signals in a signal handler. - TEVENT_NUM_SIGNALS is calculated by configure in order to support realtime signals on freebsd. - ./configure --disable-python was fixed for the standalone build. - Several crash bugs in the poll backend are fixed. - The poll backend removes deleted events from the cached pollfd array now. - The poll doesn't pass pollfd.events == 0 to poll() and maintains a list of disabled events, instead of consuming 100% cpu and/or triggering the callers handler. - The poll backend detects POLLNVAL and reports EBADF instead of consuming 100% cpu. - The select backend supports separate handlers for TEVENT_FD_READ and TEVENT_FD_WRITE. - The poll and select backends are now doing fair queuing of fd events. - The epoll has better error checking and supports separate handlers for TEVENT_FD_READ and TEVENT_FD_WRITE. - The standard backend was rewritten to be a tiny wrapper on top of epoll with a fallback to poll, which means that it doesn't use select directly anymore. - TEVENT_TRACE_BEFORE_LOOP_ONCE and TEVENT_TRACE_AFTER_LOOP_ONCE are added in order to allow the application to hook in before and after the loop_once() backend function is called. The TEVENT_HAS_LOOP_ONCE_TRACE_POINTS define can be used to detect the new feature. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org> Autobuild-User(master): Jeremy Allison <jra@samba.org> Autobuild-Date(master): Sat Mar 2 02:15:44 CET 2013 on sn-devel-104
2013-03-01tevent: optimize adding new zero timer eventsStefan Metzmacher6-31/+113
Such events were used before we had immediate events. It's likely that there're a lot of this events and we need to add new ones in fifo order. The tricky part is that tevent_common_add_timer() should not use the optimization as it's used by broken Samba versions, which don't use tevent_common_loop_timer_delay() in source3/lib/events.c. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: optimize adding new timer eventsStefan Metzmacher1-8/+24
As new timestamps typically get higher:-) it's better to traverse the existing list from the tail. This is not completely optimal, but it should be better than before. A second optimization could be done for zero timestamps, we would just remember the last_zero_timer, but that would change the internal ABI. Normally thatshould not be a poblem, but the Samba's source3/lib/events.c abuses tevent_internal.h from the current source tree, even if an external tevent.h is used. The other problem is that it makes use of tevent_common_add_timer() without using tevent_common_loop_timer_delay(). Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: add a debug message in tevent_common_loop_timer_delay()Stefan Metzmacher1-0/+4
We should debug a message before and after running the handler. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: add test_event_fd2()Stefan Metzmacher1-0/+242
This test fills the socket kernel buffers and verifies that we don't report TEVENT_FD_WRITE if the buffer is full. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: add test_event_fd1()Stefan Metzmacher1-0/+221
This test verifies that TEVENT_FD_* flags are handled correctly. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: use better names for the subtestsStefan Metzmacher1-2/+9
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: Regression test to ensure that a tevent backend can cope with ↵Jeremy Allison1-11/+50
separate read/write events on a single fd. This tests the multiplex fd changes to the epoll backend to ensure they work correctly. Signed-off-by: Jeremy Allison <jra@samba.org> Reviewed-by: Stefan Metzmacher <metze@samba.org>
2013-03-01tevent: use DEBUG_ERROR for the fallback message in epoll_panic()Stefan Metzmacher1-1/+1
A Samba autobuild passed without a fallback, so this is really an error. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: If epoll_ctl(..EPOLL_CTL_ADD,..) failes with EEXIST, merge the two ↵Jeremy Allison1-0/+7
fde's into one epoll event. Signed-off-by: Jeremy Allison <jra@samba.org> Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Stefan Metzmacher <metze@samba.org>
2013-03-01tevent: preferr the write handler if there're two possible handlers ↵Stefan Metzmacher1-0/+10
registered with epoll Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: In epoll_event_loop() ensure we trigger the right handler for a ↵Stefan Metzmacher1-7/+36
multiplexed fde event. Signed-off-by: Jeremy Allison <jra@samba.org> Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Stefan Metzmacher <metze@samba.org>
2013-03-01tevent: Add utility function epoll_handle_hup_or_err()Jeremy Allison1-0/+32
We'll use this to handle the EPOLL_ADDITIONAL_FD_FLAG_GOT_ERROR and EPOLL_ADDITIONAL_FD_FLAG_REPORT_ERROR flags with multiplexed events in the event loop. Signed-off-by: Jeremy Allison <jra@samba.org> Reviewed-by: Stefan Metzmacher <metze@samba.org>
2013-03-01tevent: handle EPOLL_ADDITIONAL_FD_FLAG_HAS_MPX in epoll_update_event()Stefan Metzmacher1-0/+17
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: handle multiplexed fde's in epoll_event_fd_destructor()Stefan Metzmacher1-0/+21
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: Fix epoll_mod_event() to cope with modifying a multiplexed fde event.Stefan Metzmacher1-2/+32
Signed-off-by: Jeremy Allison <jra@samba.org> Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Stefan Metzmacher <metze@samba.org>
2013-03-01tevent: Fix up epoll_del_event to cope with deleting a multiplexed fde event.Jeremy Allison1-2/+18
Signed-off-by: Jeremy Allison <jra@samba.org> Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Stefan Metzmacher <metze@samba.org>
2013-03-01tevent: handle multiplexed fde's in epoll_add_event()Stefan Metzmacher1-2/+32
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: Start to fix the epoll backend to support 2 fd events on the same fd ↵Jeremy Allison1-1/+96
correctly. Add a utility function epoll_add_multiplex_fd() and a new flag EPOLL_ADDITIONAL_FD_FLAG_HAS_MPX. This will be called by epoll_add_event() to merge two fde events with the same file descriptor. Signed-off-by: Jeremy Allison <jra@samba.org> Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Stefan Metzmacher <metze@samba.org>
2013-03-01tevent: ignore EBADF from epoll_ctl() and disable the eventStefan Metzmacher1-2/+26
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: unify handling of HAS_EVENT and REPORT_ERROR in ↵Stefan Metzmacher1-10/+6
epoll_{add,mod,del}_event() epoll_{add,mod,del}_event() are only called via epoll_update_event() and epoll_update_event() should not remove REPORT_ERROR itself. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: always go through epoll_update_event()Stefan Metzmacher1-9/+14
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: s/epoll_change_event/epoll_update_eventStefan Metzmacher1-2/+2
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: the content of event is ignored by EPOLL_CTL_DELStefan Metzmacher1-2/+0
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: call epoll_panic() if EPOLL_CTL_DEL failedStefan Metzmacher1-4/+11
Only ENOENT is ignored as it is no error. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: use helper variables to hold the epoll_ctl() resultStefan Metzmacher1-3/+9
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: remove unused if (epoll_ev->epoll_fd == -1) return; checksStefan Metzmacher1-9/+0
We'll never leave epoll_check_reopen() with epoll_fd == -1. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: add std_event_loop_wait()Stefan Metzmacher1-0/+17
We also need to fallback in tevent_loop_wait() otherwise we might miss events in the poll->fresh list. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: don't call TALLOC_FREE(ev->additional_data) in std_fallback_to_poll()Stefan Metzmacher1-1/+0
The epoll backend has done the cleanup already. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: avoid any operation on epoll_ev after a epoll_panic()Stefan Metzmacher1-11/+74
This calls TALLOC_FREE(ev->additional_data), which is epoll_ev within epoll_panic() before calling the fallback handler. In order to notice that a epoll_panic() happened, a caller can register a pointer to a bool variable under epoll_ev->panic_state. As epoll_check_reopen() can fail due to a epoll_panic(), we need to force the replay flag if we have called any event handler. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: add epoll_{create,ctl}_panic_fallback() for testingStefan Metzmacher1-5/+49
This makes sure we only do random panics if a fallback handler is registered. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: use DLIST_DEMOTE() before calling on fde handler after select() and ↵Stefan Metzmacher2-0/+2
poll() This makes sure we don't preferr events which are at the beginning of the list. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: debug a FATAL message on EBADF from the select backendStefan Metzmacher1-0/+4
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: Fix multiple handler on the same fd bug in the tevent select backend.Jeremy Allison1-2/+6
When we're deciding what handlers to call in the select backend, we didn't take into account the fact that the same fd may have been added into the read FD_SET and the write FD_SET but with different handlers. We must match on both the file descriptor and the flags requested before calling the handler. Signed-off-by: Jeremy Allison <jra@samba.org> Reviewed-by: Stefan Metzmacher <metze@samba.org>
2013-03-01tevent: revalidate fde->flags after poll()Stefan Metzmacher1-0/+6
This is important to avoid races between threads if the poll_mt backend is used. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: ignore POLLNVAL from poll() and disable the eventStefan Metzmacher1-1/+44
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: traverse the ev->fd_event list instead of the poll_ev->fds arrayStefan Metzmacher1-26/+5
That has the same complexity but simplifies the code. It also seems to fix a real problem, which was found by the following test failure in Samba's autobuild, while removing the epoll support from the "standard" backend. [402/1555 in 19m8s] samba3.raw.composite(plugin_s4_dc) smbtorture 4.1.0pre1-DEVELOPERBUILD Using seed 1361531675 Testing savefile Testing parallel fetchfile with 10 ops waiting for completion maximum runtime exceeded for smbtorture - terminating UNEXPECTED(error): samba3.raw.composite.fetchfile (subunit.RemotedTestCase)(plugin_s4_dc) REASON: _StringException: _StringException: was started but never finished! UNEXPECTED(error): samba3.raw.composite.fetchfile(plugin_s4_dc) (subunit.RemotedTestCase) REASON: was started but never finished! Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: maintain a list of disabled events in the poll backendStefan Metzmacher1-7/+48
We need to avoid passing pollfd.events == 0, to poll(), as it will report POLLERR and POLLHUP events, but our caller does not expect the event handler to be called. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: merge poll_fresh_fde_destructor() into poll_event_fd_destructor()Stefan Metzmacher1-18/+6
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: use tevent_poll_event_add_fd_internal() in poll_event_add_fd()Stefan Metzmacher1-2/+1
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: make sure we cleanup the array passed to poll() after deleting an eventStefan Metzmacher1-0/+30
If we don't cleanup the array passed to poll after an event was deleted, we may pass a bad file descriptor to poll(). This was found by the following test failure in Samba's autobuild, while removing the epoll support from the "standard" backend. [48/1555 in 4m37s] samba3.smbtorture_s3.plain(s3dc).LOCK4 UNEXPECTED(failure): samba3.smbtorture_s3.plain(s3dc).LOCK4.smbtorture(s3dc) REASON: _StringException: _StringException: using seed 1361530718 host=127.0.0.2 share=tmp user=metze myname=sn-devel-104 Running LOCK4 starting locktest4 Failed to create file: NT_STATUS_INVALID_HANDLE finished locktest4 TEST LOCK4 FAILED! LOCK4 took 190.492 secs Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: don't skip a fd event if the previous one was deleted during poll()Stefan Metzmacher1-2/+9
In a threaded environment it can happen that an tevent_fd is talloc_free'ed while the main thread sleeps in the poll() syscall. In such a case poll_event_fd_destructor() would set poll_ev->fdes[i] = NULL. We then skip the removed event, but before we also skipped the one that was located at the end of the array. We moved it to possition 'i', but the next loop uses 'i=i+1'. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: remember the errno from select(), poll() and epoll_wait()Stefan Metzmacher3-5/+11
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: add trace points BEFORE_LOOP_ONCE and AFTER_LOOP_ONCEMichael Adam3-0/+18
The define TEVENT_HAS_LOOP_ONCE_TRACE_POINTS can be used to detect the new feature, without writing configure tests. Pair-Programmed-With: Stefan Metzmacher <metze@samba.org> Signed-off-by: Michael Adam <obnox@samba.org> Signed-off-by: Stefan Metzmacher <metze@samba.org>
2013-03-01tevent: fix compiler warning in tevent_context_init_byname()Stefan Metzmacher1-1/+1
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: fix some compiler warnings in testsuite.cStefan Metzmacher1-1/+15
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: fix a comment typo in tevent_epoll.cMichael Adam1-1/+1
Signed-off-by: Michael Adam <obnox@samba.org> Reviewed-by: Stefan Metzmacher <metze@samba.org>
2013-03-01tevent: fix --disable-python cause configure fails (bug #8718)Galen.Liu1-1/+1
When we disable python, it will cause build fail! so, the patch will fix it. Reviewed-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01tevent: define TEVENT_NUM_SIGNALS based on configure checksStefan Metzmacher3-2/+46
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2013-03-01lib/replace: add AC_CHECK_VALUEOF() macroStefan Metzmacher1-0/+15
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
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