Commit Graph

89 Commits

Author SHA1 Message Date
Nick Mathewson
871ff0006d Add an API for a scheduled/manually activated event in the mainloop
Using this API lets us remove event2/event.h usage from half a dozen
modules, to better isolate libevent.  Implements part of ticket
23750.
2018-04-05 12:35:11 -04:00
Nick Mathewson
9e48338a12 Merge branch 'maint-0.3.2' 2018-02-02 12:03:54 -05:00
David Goulet
005e228f80 sched: When releasing a channel, do not BUG() if absent from the pending list
The current code flow makes it that we can release a channel in a PENDING
state but not in the pending list. This happens while the channel is being
processed in the scheduler loop.

Fixes #25125

Signed-off-by: David Goulet <dgoulet@torproject.org>
2018-02-02 12:03:27 -05:00
Nick Mathewson
77634795b0 Merge remote-tracking branch 'dgoulet/bug24700_032_01' into maint-0.3.2 2018-02-01 16:57:57 -05:00
David Goulet
e1a40535ea Merge branch 'bug24700_032_01' into bug24700_033_01 2018-02-01 16:39:04 -05:00
Nick Mathewson
cb5654f300 sched: Use the sched_heap_idx field to double-check our fix for 24700.
Signed-off-by: David Goulet <dgoulet@torproject.org>
2018-02-01 16:00:59 -05:00
Nick Mathewson
ca85d66217 Merge branch 'maint-0.3.2' 2018-02-01 08:15:09 -05:00
David Goulet
fbc455cbd2 ns: Add a before and after consensus has changed notification
In 0.3.2.1-alpha, we've added notify_networkstatus_changed() in order to have
a way to notify other subsystems that the consensus just changed. The old and
new consensus are passed to it.

Before this patch, this was done _before_ the new consensus was set globally
(thus NOT accessible by getting the latest consensus). The scheduler
notification was assuming that it was set and select_scheduler() is looking at
the latest consensus to get the parameters it might needs. This was very wrong
because at that point it is still the old consensus set globally.

This commit changes the notify_networkstatus_changed() to be the "before"
function and adds an "after" notification from which the scheduler subsystem
is notified.

Fixes #24975
2018-01-31 14:15:02 -05:00
Matt Traudt
265b8e8645 Function declaration whitespace 2017-12-11 09:43:09 -05:00
Matt Traudt
67793b615b One more missed chance to use get_scheduler_state_string 2017-12-11 09:43:09 -05:00
Matt Traudt
667f931177 Make get_scheduler_state_string available to scheduler*.c 2017-12-11 09:43:09 -05:00
Matt Traudt
8797c8fbd3 Remove now-duplicate log_debug lines 2017-12-11 09:43:09 -05:00
Matt Traudt
07898fb2a6 Helper to log chan scheduler_states as strings not ints 2017-12-11 09:43:09 -05:00
Matt Traudt
5e7fdb8b3f Fix cosmetic issues around scheduler_set_channel_state
Whitespace issues

Line length

Unused variable
2017-12-11 09:43:04 -05:00
ArunaMaurya221B
ad5cfa3039 Bug:24531 Function to change channel scheduler state for easy debugging added. 2017-12-11 08:46:43 -05:00
ArunaMaurya221B
d77cacb7ab Bug:24531 Add function to change scheduler state and always use it 2017-12-11 08:46:39 -05:00
Nick Mathewson
fcdec00685 Merge branch 'maint-0.3.2' 2017-11-17 09:59:26 -05:00
Nick Mathewson
9fbc835f10 Fix a wide comment 2017-11-17 09:57:15 -05:00
Nick Mathewson
94dce246ee Merge branch 'maint-0.3.2' 2017-11-17 09:26:11 -05:00
Matt Traudt
b98614f1af Only log about lost KIST support once 2017-11-17 09:25:47 -05:00
Nick Mathewson
02a4c641da Merge branch 'maint-0.3.2' 2017-11-06 10:16:19 -05:00
Nick Mathewson
bebdd91058 Fix a 32-bit formatting warning 2017-11-06 10:16:10 -05:00
Nick Mathewson
65d22dc2f2 Merge branch 'maint-0.3.2' 2017-11-02 10:32:18 -04:00
David Goulet
6dc591a024 sched: Rate limit scheduler_bug_occurred()
Just in case we end up hitting a SCHED_BUG() multiple times, rate limit the
log warning.

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-11-02 10:30:33 -04:00
David Goulet
3931a6f264 sched: Use SCHED_BUG() macro in scheduler
When a BUG() occurs, this macro will print extra information about the state
of the scheduler and the given channel if any. This will help us greatly to
fix future bugs in the scheduler especially when they occur rarely.

Fixes #23753

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-11-02 10:30:33 -04:00
Nick Mathewson
35746a9ee7 Comment-only change: annotate exit() calls.
Sometimes when we call exit(), it's because the process is
completely hopeless: openssl has a broken AES-CTR implementation, or
the clock is in the 1960s, or something like that.

But sometimes, we should return cleanly from tor_main() instead, so
that embedders can keep embedding us and start another Tor process.

I've gone through all the exit() and _exit() calls to annotate them
with "exit ok" or "XXXX bad exit" -- the next step will be to fix
the bad exit()s.

First step towards 23848.
2017-10-19 13:42:28 -04:00
David Goulet
2e8de0de3b sched: Implement SCHED_BUG()
Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-10-03 14:43:09 -04:00
Nick Mathewson
90e8d1f58f Merge branch 'bug23539_032_01_squashed' 2017-09-25 11:12:56 -04:00
Nick Mathewson
581e2c8b2c Whitespace fix. 2017-09-25 11:12:45 -04:00
David Goulet
ef2a449cce sched: Make KISTSchedRunInterval non negative
Fixes #23539.

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-25 11:11:30 -04:00
Nick Mathewson
22e2c3bf7d Fix check-spaces and a weird copyright. 2017-09-22 12:20:26 -04:00
Nick Mathewson
ac3fdb74c2 Remove unused chosen_scheduler_type variable. 2017-09-22 09:56:54 -04:00
Matt Traudt
88b317ef28 sched: move code to respect comments
The diff is confusing, but were two static scheduler functions that
needed moving to static comment block.

No code change. Thanks dgoulet for original commit
2017-09-22 08:52:27 -04:00
Matt Traudt
22699e3f16 sched: only log when scheduler type changes
Closes 23552. Thanks dgoulet for original impl
2017-09-22 08:51:22 -04:00
David Goulet
c20d4db7bf sched: Hard exit if we can't select a scheduler
Fixes #23581

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-21 14:18:42 -04:00
Matt Traudt
4a3b61a5b3 sched: reorder code to fit comment bodies; comment typos
Closes 23560
2017-09-19 20:13:28 -04:00
Roger Dingledine
1c956ccd5f fix typos/etc found while starting to look at scheduler 2017-09-19 19:55:57 -04:00
Matt Traudt
a8c54ce581 sched: Allow the new sched to react to new cons 2017-09-19 19:07:48 -04:00
teor
e77ece3b31
Avoid a compilation warning on macOS in scheduler_ev_add()
This warning is caused by a different tv_usec data type on macOS
compared to the system on which the patch was developed.

Fixes 23575 on 0.3.2.1-alpha.
2017-09-19 16:32:47 +10:00
David Goulet
c7af923567 sched: BUG() on event_add() and log_warn next_run
It is highly unlikely to happen but if so, we need to know and why. The
warning with the next_run values could help.

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-18 10:58:38 -04:00
Nick Mathewson
c1deabd3b0 Run our #else/#endif annotator on our source code. 2017-09-15 16:24:44 -04:00
David Goulet
513d642a66 sched: Revert IF_BUG_ONCE() to tor_assert()
Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00
David Goulet
1033e14a69 sched: Define SCHEDULER_KIST_PRIVATE for more encapsulation
Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00
David Goulet
c910610701 sched: Improve logging if KIST is disabled
Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00
David Goulet
0d0b677b64 test: Fix unit tests with latest scheduler changes
Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00
David Goulet
734dbfa590 sched: Make the scheduler object static
Each type of scheduler implements its own static scheduler_t object and
returns a reference to it.

This commit also makes it a const pointer that is it can only change inside
the scheduler type subsystem but not outside for extra protection.

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00
David Goulet
14cd8bdd4b sched: Don't expose the global scheduler libevent object
Instead, add wrappers to do the needed action the different scheduler needs
with the libevent object.

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00
David Goulet
84d18f70f3 sched: Always call on_channel_free() regardless of state
A channel can bounce in the scheduler and bounce out with the IDLE state which
means that if it came in the scheduler once, it has socket information that
needs to be freed from the global hash table.

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00
David Goulet
7cc9621d11 sched: Add Schedulers torrc option
This option is a list of possible scheduler type tor can use ordered by
priority. Its default value is "KIST,KISTLite,Vanilla" which means that KIST
will be used first and if unavailable will fallback to KISTLite and so on.

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00
Matt Traudt
6ff8c86ac6 sched: change most asserts to non-fatal BUGs 2017-09-15 11:40:59 -04:00