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Commit Graph

771 Commits

Author SHA1 Message Date
Maria Matejka
e6242ef948 Merge commit '8a40bccf' into thread-merge-2.16 2024-11-28 09:36:33 +01:00
Maria Matejka
74800729c0 Proto: The active flag converted to actual fifth protocol state
What was PS_DOWN before, is now PS_DOWN and PS_FLUSH.
2024-11-18 22:21:12 +01:00
Katerina Kubecova
dc69284f61 MRT: buildable and running again for BIRD 3
Tests for MRT are scarce and not automated for now, so it may behave
weirdly in corner cases.
2024-11-14 11:41:37 +01:00
Katerina Kubecova
716472957b Kernel: protocol shuts down synchronously
Before this commit, on kernel shutdown, the routes were re-exported by
the regular export but treated as withdraw. This was too hairy and
caused unnecessary complexity of the protocol's state machine.

Instead of that, we found out that it makes more sense to just refeed
the routes synchronously and convert to withdraw. This is done by the
direct export access instead of the channel.

It would (maybe) make more sense to run export filters on this in case
the export filter updates the krt_metric attribute, but as this doesn't
work on regular withdraw anyway, it's better for now to just let it be
and maybe somebody in the future fixes this issue.
2024-09-30 10:04:36 +02:00
Maria Matejka
d53582c9a1 show threads: displaying the same thread id's as in log 2024-06-28 22:03:45 +02:00
Maria Matejka
6eea722d3f Forbid locking altogether when RCU reader is active 2024-06-28 22:03:45 +02:00
Maria Matejka
1e77e6e1b2 Flush deferred calls directly after the loop finished its one run 2024-06-28 22:03:45 +02:00
Maria Matejka
865bab6237 IO: Allow to take new loops if the thread is hot, but only one at time 2024-06-28 22:03:45 +02:00
Maria Matejka
18d069d663 Even on shutdown we should try to pass the freed memory to others 2024-06-27 08:22:15 +02:00
Maria Matejka
af73cc4215 Allocator now reports cold pages 2024-06-26 20:45:54 +02:00
Maria Matejka
b797444e94 Merge commit 'b95dc8f29f18eb177f91fdc4bf0716fac9b15366' into mq-config-ref
Also converted all _Bool's to bool.
2024-06-26 17:19:24 +02:00
Alexander Zubkov
8a40bccffe BFD: Add option to accept zero checksum for IPv6 UDP packets
Some vendors do not fill the checksum for IPv6 UDP packets.
For interoperability with such implementations one can set
UDP_NO_CHECK6_RX socket option on Linux.

Thanks to Ville O for the suggestion.

Minor changes by committer.
2024-06-26 16:29:57 +02:00
Maria Matejka
2a6fe617b1 IO: allow for faster loop dropping 2024-06-26 11:30:48 +02:00
Maria Matejka
7d455d64ca Remove spinlock debug structures in production build 2024-06-26 11:30:41 +02:00
Maria Matejka
2c4b368176 RPKI socket read is prioritized over other sockets 2024-06-26 11:29:43 +02:00
Maria Matejka
9be90c0f84 Fixed a race condition in rcu-domain blocking 2024-06-19 12:36:55 +02:00
Maria Matejka
dda37842dc No page flush before polling
The maximum amount of locally kept pages is 128 so we can just
well keep the half-meg of RAM allocated and prepared for future use.
2024-06-18 11:02:51 +02:00
Maria Matejka
83045e9a1f Configuration obstacles made a separate, explicit structure
With this, one can walk the obstacle list in a debugger and
easier see which specific object is holding the reference.
2024-06-14 23:16:07 +02:00
Maria Matejka
61dcbb1d83 Global runtime values separated from config 2024-06-14 23:16:07 +02:00
Maria Matejka
397eee5a00 Config: Removed obsolete force_restart option when commiting 2024-06-14 23:16:07 +02:00
Maria Matejka
ea4aef2a14 Memory allocator tweaking
TODO: make this configurable
2024-06-12 14:48:33 +02:00
Maria Matejka
5c8179d63a Time accounting must be done by coarse timers
on some ARM, the precise timers are too slow to be actually useful
2024-06-12 14:48:33 +02:00
Maria Matejka
2e882d4a7d IO Loop: process socket reads only after timers and events are done 2024-06-12 14:48:33 +02:00
Maria Matejka
50d7287741 IO Threads: scheduler debug shows info on next loop to run 2024-06-12 14:48:33 +02:00
Maria Matejka
1180f25123 Threads: smoothening loop pickup and less aggressive dropping 2024-06-12 14:48:33 +02:00
Maria Matejka
8ad9c946e1 IO loop picker fixed
Now if the thread finds out that it actually isn't busy,
it unsets the business status and picks something up right away.
2024-06-12 14:48:33 +02:00
Maria Matejka
4bca3b9f86 Task-in-limit checker hacked for mainloop 2024-06-12 14:48:33 +02:00
Maria Matejka
661193cf98 Thread IO: a little bit faster RX repeat 2024-06-12 14:48:33 +02:00
Maria Matejka
bf961ba405 Threads shouldn't drop stopping loops 2024-06-12 09:23:50 +02:00
Maria Matejka
0fb9177374 Loop scheduler tracing options configurable 2024-06-12 09:23:50 +02:00
Maria Matejka
67e9a37291 Fixed nanoseconds in IO loop time limiter 2024-06-12 09:23:50 +02:00
Maria Matejka
4104d668d9 Read-write spinlocks 2024-06-12 09:23:50 +02:00
Maria Matejka
6ffab25f01 IO loop: fixed unassigned count 2024-06-04 22:20:18 +02:00
Maria Matejka
423eaf3438 Softened warning about too much time spent in loop
Now the warning needs at least 10 ms after the scheduled end time
to ever complain.

TODO: make this configurable
2024-06-04 22:20:18 +02:00
Maria Matejka
2705c385c0 Never allow more than 300 ms per loop 2024-06-04 10:11:36 +02:00
Maria Matejka
dc416d2de3 RCU: Rewritten to be more straightforward 2024-06-04 10:11:36 +02:00
Maria Matejka
10bb1c1e9d Real almost-lockless feeds and more pull-like exports
Introducing a new omnipotent internal API to just pass route updates
from whatever point wherever we want.

From now on, all the exports should be processed by RT_WALK_EXPORTS
macro, and you can also issue a separate feed-only request to just get a
feed and finish.

The exporters can now also stop and the readers must expect that to
happen and recover. Main tables don't stop, though.
2024-06-04 10:11:36 +02:00
Maria Matejka
b5f803ce4a Simplified temporary resources
Also TMP_SAVED now uses the CLEANUP hook to allow for breaks and returns
2024-05-25 19:37:16 +02:00
Maria Matejka
76ca53e4f8 SKIP_BACK_DECLARE: easier embedded-to-parent typecasting 2024-05-25 19:37:16 +02:00
Maria Matejka
29cd2c0170 Refactored the deferring framework into a separate structure 2024-05-22 11:34:34 +02:00
Maria Matejka
2b38a833cd Avoiding RCU synchronization deadlock when locking in critical section
Explicitly marking domains eligible for RCU synchronization. It's then
forbidden to lock these domains in RCU critical section to avoid
possible deadlock.
2024-05-22 11:34:34 +02:00
Maria Matejka
eaf187b57b Table feeds are now lockless
This commit makes the route chains in the tables atomic. This allows not
only standard exports but also feeds and bulk exports to be processed
without ever locking the table.

Design note: the overall data structures are quite brittle. We're using
RCU read-locks to keep track about readers, and we're indicating ongoing
work on the data structures by prepending a REF_OBSOLETE sentinel node
to make every reader go waiting.

All the operations are intended to stay inside nest/rt-table.c and it
may be even best to further refactor the code to hide the routing table
internal structure inside there. Nobody shall definitely write any
routines manipulating live routes in tables from outside.
2024-05-22 11:34:34 +02:00
Maria Matejka
a716e7ea79 Kernel: replaced synchronous prune by a refeed 2024-05-22 11:34:34 +02:00
Maria Matejka
46164395b2 Fixed all implicit seq_cst warnings caused by the previous commit 2024-05-22 11:34:34 +02:00
Maria Matejka
6a13c02d3b Removed the obsolete birdloop flagger
This was useful when events were locking. As now sending events is lockless,
we can drop this obsolete routine for good.
2024-05-22 11:34:34 +02:00
Maria Matejka
4b9d12708e Loop run waits until pingers finish
This ensures that if somebody passes an event to a loop which
has just started executing, then the event gets picked up. Otherwise
there is a race condition causing stray events pending in queue
but without the ping (because the run actually finishes too fast
to pickup the later events).
2024-05-18 15:50:03 +02:00
Maria Matejka
67f6ac1628 IO Loop: provide information about current loop and task time limit 2024-05-18 15:48:03 +02:00
Maria Matejka
b1b3c7aac2 Allowing to send events to the metaloop's priority list 2024-05-18 15:48:03 +02:00
Maria Matejka
418578bc6b IO loop: fixed local hot page cache flushing condition 2024-05-18 15:48:03 +02:00
Maria Matejka
b95dc8f29f Expanded usage of stdbool.h to the whole BIRD 2024-03-25 09:39:58 +01:00