Commit graph

853 commits

Author SHA1 Message Date
Ondrej Zajicek (work)
7be3af7fa6 Rate-limit scheduling of work-events
In general, events are code handling some some condition, which is
scheduled when such condition happened and executed independently from
I/O loop. Work-events are a subgroup of events that are scheduled
repeatedly until some (often significant) work is done (e.g. feeding
routes to protocol). All scheduled events are executed during each
I/O loop iteration.

Separate work-events from regular events to a separate queue and
rate limit their execution to a fixed number per I/O loop iteration.
That should prevent excess latency when many work-events are
scheduled at one time (e.g. simultaneous reload of many BGP sessions).
2021-03-12 15:35:56 +01:00
Ondrej Zajicek (work)
211fe69c98 Nest: No automatic ROA reload on non-reloadable channels 2021-03-09 18:37:52 +01:00
Ondrej Zajicek (work)
d3782c72b9 Nest: Add option to control automatic RPKI reload
Also, no automatic reload for BGP channels without import/export table.
2021-02-12 05:05:18 +01:00
Vincent Bernat
714238716e BGP: Add support for BGP hostname capability
This is an implementation of draft-walton-bgp-hostname-capability-02.
It is implemented since quite some time for FRR and in datacenter, this
gives a nice output to avoid using IP addresses.

It is disabled by default. The hostname is retrieved from uname(2) and
can be overriden with "hostname" option. The domain name is never set
nor displayed.

Minor changes by committer.
2021-02-10 16:53:57 +01:00
Ondrej Zajicek (work)
00b85905b9 Nest: Automatic channel reloads based on RPKI changes
If there are roa_check() calls in channel filters, then the channel
subscribes to ROA table notifications, which are sent when ROA tables
are updated (subject to settle time) and trigger channel reload or
refeed.
2021-02-10 03:09:57 +01:00
Ondrej Zajicek (work)
d06a875b04 Filter: Recursive filter iteration code
Add macros for recursive filter iteration that allows to examine
all instructions reachable from a filter.
2021-02-07 19:21:42 +01:00
Ondrej Zajicek (work)
7a1f4baac1 Nest: remove last_tx_filter_change
No longer needed after redesign of export handling.
2021-01-06 14:51:49 +01:00
James Lu
455c13dc99 Nest: Read Babel metric as IGP metric
(Minor syntactic changes by committer)
2020-12-29 02:25:21 +01:00
Ondrej Zajicek (work)
61dae32b29 Nest: Per-channel debug flags
The patch add support for per-channel debug flags, currently just
'states', 'routes', and 'filters'. Flag 'states' is used for channel
state changes, remaining two for routes passed through the channel.
The per-protocol debug flags 'routes'/'filters' still enable reporting
of routes for all channels, to keep existing behavior.

The patch causes minor changes in some log messages.
2020-12-07 22:19:40 +01:00
Ondrej Zajicek (work)
30b8468269 Minor cleanups with cfg_allocz()
Also fixes some more failed asserts due to add_tail().
2020-11-24 04:09:11 +01:00
Ondrej Zajicek (work)
1678bc0746 Fix some failed asserts due to add_tail()
When config structures are copied due to template application,
we need to reset list node structure before calling add_tail().

Thanks to Mikael Magnusson for patches.
2020-11-24 03:42:23 +01:00
Ondrej Zajicek (work)
c9ae81656f Some minor sl_allocz() cleanups 2020-11-24 03:21:44 +01:00
Ondrej Zajicek (work)
b962967e20 Nest: Fix crash in receive limit handling in import table
Logging as a result of triggered receive limit in import table code
accesset rte->net, which was not filed yet.

Thanks to Pier Carlo Chiodi for the bugreport.
2020-11-15 16:01:19 +01:00
Ondrej Zajicek (work)
3b56bf8849 BFD: Better handling of BFD options in BGP configs
Merge multiple BFD option blocks in BGP configs instead of using the last
one. That is necessary for proper handling of templates when BFD options
are used both in a BGP template and in a BGP protocol derived from that
template.
2020-11-12 04:02:38 +01:00
Ondrej Zajicek (work)
9d3fc3062b BFD: Allow per-request session options
BFD session options are configured per interface in BFD protocol. This
patch allows to specify them also per-request in protocols requesting
sessions (currently limited to BGP).
2020-11-08 15:33:22 +01:00
Ondrej Zajicek (work)
c0e1f534c9 Nest: Keep route ordering during route updates
Put new non-best routes to the end of list instead of the second
position. Put updated routes to their old position. Position is changed
just by best route selection.
2020-07-16 15:02:10 +02:00
Ondrej Zajicek (work)
c26c6bc2d7 Show info from multiple protocols when protocol is not specified
Most commands like 'show ospf neighbors' fail when protocol is not
specified and there are multiple instances of given protocol type.
This is annoying in BIRD 2, as many protocols have IPv4 and IPv6
instances. The patch changes that by showing output from all protocol
instances of appropriate type.

Note that the patch also removes terminating cli_msg() call from these
commands and moves it to the common iterating code.
2020-06-28 15:38:47 +02:00
Ondrej Zajicek (work)
1ca7665fa4 Nest: Allow key id 0
There is nothing in RFCs specifying that id 0 is not allowed. Some
implementations does not support it, while some other use key id 0 by
default. We allow it but start with key id 1 by default.

Thanks to Kenth Eriksson for the bugreport.
2020-05-19 02:50:47 +02:00
Ondrej Zajicek (work)
ec430a7fee Nest: Implement BGP path mask loop operator
Implement regex-like '+' operator in BGP path masks to match previous
path mask item multiple times. This is useful as ASNs may appear
multiple times in paths due to path prepending for traffic engineering
purposes.
2020-05-18 16:25:08 +02:00
Ondrej Zajicek (work)
b8bbbbaf56 Nest: Fix neighbor handling for colliding ranges
Resolve neighbors using longest prefix match. Although interface ranges
should not generally collide, it may happen for unnumbered links.

Thanks to Kenth Eriksson for the bugreport.
2020-05-11 04:29:36 +02:00
Maria Matejka
b12442c985 Fixed a harmless warning in production build 2020-05-01 15:41:42 +02:00
Maria Matejka
3bb10b4d31 Uninitialized list nodes fixes 2020-05-01 15:19:12 +02:00
Maria Matejka
258be56539 Nest: Added const to ea_show just to declare that this shouldn't really change anything 2020-05-01 15:19:12 +02:00
Maria Matejka
0fa8bf91cd Nest: Several assumptions to tame the static analyzer 2020-05-01 15:19:12 +02:00
Maria Matejka
bbe49ae569 Nest: Assumption in rt-show for not-so-intuitive invariant. 2020-05-01 15:19:12 +02:00
Nasato Goto
a6548d5b5b BGP: Fix handling of 16bit-only ASN translation
The bug generated invalid AGGREGATOR attribute during translation of
32bit ASN to 16bit-only BGP peer. The patch fixes that.
2020-04-15 03:46:53 +02:00
Maria Matejka
fd9f0c0640 Configuration strings are constant.
This is merely a const propagation. There was no problem in there.
2020-04-09 15:37:14 +02:00
Ondrej Zajicek (work)
2755002890 Filter: Optimize IPv4 prefix sets
Use separate IPv4 and IPv6 implementation of prefix sets. Just this
change makes IPv4 prefix sets 60% smaller and 50% faster.
2020-03-26 03:57:48 +01:00
Ondrej Zajicek (work)
22c3cf955d RIP: Demand circuit support (RFC 2091) 2020-02-21 02:35:50 +01:00
Maria Matejka
4bbc10614f Added missing extern
Thanks to Robert Scheck <bird@robert-scheck.de> who reported it
and Toke Høiland-Jørgensen <toke@toke.dk> who suggested this patch.
2020-02-04 10:11:16 +01:00
Ondrej Zajicek (work)
7d767c5a3d KRT: Improve syncer code to avoid using temporary data in rtable
The old code stored route verdicts and temporary routes directly in
rtable. The new code do not store received routes (it immediately
compares them with exported routes and resolves conflicts) and uses
internal bitmap to keep track of which routes were received and which
needs to be reinstalled.

By not putting 'invalid' temporary routes to rtable, we keep rtable
in consistent state, therefore scan no longer needs to be atomic
operation and could be splitted to multiple events.
2020-01-07 18:35:03 +01:00
Ondrej Zajicek (work)
cc75b3e1dc KRT: Remove KRF_SYNC_ERROR flag
This info is now stored in an internal bmap. Unfortunately, net.flags
is still needed for temporary kernel data.
2019-12-19 16:34:35 +01:00
Ondrej Zajicek (work)
c132acae36 KRT: Remove KRF_INSTALLED flag
The same information is stored in export_map of kernel protocol.
2019-12-16 02:42:24 +01:00
Ondrej Zajicek (work)
4ab54f1aef Nest: Fix bitmap cleanup
Channel currently does not have independent pool and uses protocol pool,
which is freed when protocol changes state to down, while channel is
still in flushing. Move some some cleanup code to channel_do_flush()
so it is done before freeing of protocol pool.
2019-12-10 18:18:02 +01:00
Ondrej Zajicek (work)
5ea39eaa96 Nest: Use bitmaps to keep track of exported routes
Use a hierarchical bitmap in a routing table to assign ids to routes, and
then use bitmaps (indexed by route id) in channels to keep track whether
routes were exported. This avoids unreliable and inefficient re-evaluation
of filters for old routes in order to determine whether they were exported.
2019-11-26 18:39:25 +01:00
Ondrej Zajicek (work)
d033e6327d CLI: Fix continuation lines after final one
Continuation lines may use short form (with space instead of message
number), but this should not be done when previous line is final.

Thanks to Kenth Eriksson for the bugreport and analysis.
2019-11-26 16:43:09 +01:00
Ondrej Zajicek (work)
a52476c9be BGP: Add option to reject AS_SETs
There is a pending draft to make them obsolete
2019-11-04 22:09:35 +01:00
Ondrej Zajicek (work)
0edf0c8cd9 Support for address family constants
We already had them defined on BGP level, but they are more general.
2019-11-03 22:25:44 +01:00
Ondrej Zajicek (work)
08c4c9a30b Nest: Fix bug in export table
For regular channels do not compare src in export table, as we want to
keep here only the best (exported) route per network.
2019-11-03 20:25:42 +01:00
Ondrej Zajicek (work)
498d8145c0 Nest: Fix primary flag in show route
The route is changed by rte_make_tmp_attrs(), so we need to compare
net->routes to the original one.

Thanks to Kenth Eriksson for the bugreport.
2019-10-25 13:28:51 +02:00
Fabrice Fontaine
f9eb9b4cab Nest: Fix build without protocols
(CHECK keyword added by commiter)
2019-10-19 12:50:27 +02:00
Ondrej Zajicek (work)
843b10c8b0 Nest: Handle non-MPLS on MPLS case in recursive route update
When non-MPLS recursive route resolves to MPLS underlying route,
then it should get MPLS labels from the the underlying route.
2019-10-10 15:25:36 +02:00
Ondrej Zajicek (work)
9eace84342 Nest: Handle PtP links in recursive route update
Underlying (IGP) route may lead to PtP link, in this case it does not
need gateway. Which is different than direct route without gateway.

When recursive (BGP) route uses PtP route, it should not use recursive
next hop as immediate next hop, while for direct routes it should.
2019-10-10 15:06:32 +02:00
Ondrej Zajicek (work)
cb2b6e0494 Nest: Fix recursive route update
Missing cleanup can lead to dangling pointer to old next hops.
2019-10-10 14:01:16 +02:00
Ondrej Zajicek (work)
09ee846d92 BGP: AIGP metric support (RFC 7311) 2019-10-09 17:53:23 +02:00
Ondrej Zajicek (work)
ca2dacfcee Nest: Fix bug in export table
Exported route may be in modified state, we need to get cached one for
rte_same() and rta_clone() to work properly.
2019-09-24 17:17:37 +02:00
Maria Matejka
32a254050d Channel refeed with import table splitting between routes for one prefix 2019-08-27 19:14:15 +02:00
Ondrej Zajicek (work)
a297a4f044 Nest: Fix crash in route reload when some channels are not up.
Only channels that are up can be reloaded.
2019-08-14 06:02:33 +02:00
Ondrej Zajicek (work)
b7d7599ce3 BGP: implement Adj-RIB-Out
The patch implements optional internal export table to a channel and
hooks it to BGP so it can be used as Adj-RIB-Out. When enabled, all
exported (post-filtered) routes are stored there. An export table can be
examined using e.g. 'show route export table bgp1.ipv4'.
2019-08-14 06:02:33 +02:00
Ondrej Zajicek (work)
9f3e098320 Filter: Allow to use set constants / expressions in path masks
Allow to not only use set literals in path masks, but also existing
set constants or set expressions.
2019-08-06 18:54:19 +02:00