The kernel can return to us nested attributes for BRIDGE RTM_NEWNEIGH
attributes. Just ensure that we can parse and read them.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
With the addition of resillient hashing for nexthops, the
parsing of nexthops requires telling the decoder functions
that there may be nested attributes. This was found by
code inspection of iproute2/ipnexthop.c when trying to
understand resillient hashing as well as statistics
gathering for nexthops that are / will be in upstream
kernels in the near future.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
Add actual recent nexthop.h file from kernel
and fix up resulting fallout because FRR's
original nexthop.h did not match upstream
linux kernel.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
when gre information could not be retrieved because GRE interface has
been deleted, a GRE_UPDATE message may be sent to NHRP. In that case,
the gre values are reset. There was a missing tunnel destination value,
which has been omitted.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
There is a bit of an impedance mismatch in the sequence of events here.
Depending on the dplane behavior, the `ROUTE_ENTRY_SELECTED` bit will be
inconsistent for rib_process_result().
With an asynchronous dataplane:
0. rib_process() is called
1. rib_install_kernel() is called, dplane action is queued
2. rib_install_kernel() returns
3. rib_process() sets the SELECTED bit appropriately, returns
4. dplane is done, triggers rib_process_result()
5. SELECTED bit is seen in "after" state
(5a. NHT code looks at the SELECTED bit, works correctly.)
With a synchronous dataplane:
0. rib_process() is called
1. rib_install_kernel() is called, dplane action is executed
2. dplane (should) trigger rib_process_result()
3. SELECTED bit is seen in "before" state
(3a. NHT code looks at the SELECTED bit, fails.)
4. rib_install_kernel() returns
5. rib_process() sets the SELECTED bit appropriately, too late.
Essentially, poking the dataplane is a sequencing point where control is
handed over to the dplane. Control may or may not return immediately.
Doing /anything/ after triggering the dataplane is a recipe for odd race
conditions.
(FWIW, I'm not sure rib_process_result() is called correctly in the
synchronous case, but that's a separate problem.)
Unfortunately, this change might have some unforeseen side effects. I
haven't dug through the code to see if anything breaks. There
/shouldn't/ be anything looking at the SELECTED bit here, but who knows.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
Do not return pointer to the newly created thread from various thread_add
functions. This should prevent developers from storing a thread pointer
into some variable without letting the lib know that the pointer is
stored. When the lib doesn't know that the pointer is stored, it doesn't
prevent rescheduling and it can lead to hard to find bugs. If someone
wants to store the pointer, they should pass a double pointer as the last
argument.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
rib_update() was mallocing memory then attempting to schedule
and if the schedule failed( it was already going to be run )
FRR would then free the memory. Fix this memory usage pattern
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
It allows FRR to read the interface config even when the necessary VRFs
are not yet created and interfaces are in "wrong" VRFs. Currently, such
config is rejected.
For VRF-lite backend, we don't care at all about the VRF of the inactive
interface. When the interface is created in the OS and becomes active,
we always use its actual VRF instead of the configured one. So there's
no need to reject the config.
For netns backend, we may have multiple interfaces with the same name in
different VRFs. So we care about the VRF of inactive interfaces. And we
must allow to preconfigure the interface in a VRF even before it is
moved to the corresponding netns. From now on, we allow to create
multiple configs for the same interface name in different VRFs and
the necessary config is applied once the OS interface is moved to the
corresponding netns.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
When something is used only from zebra and part of its description is
"should be called from zebra only" then it belongs to zebra, not lib.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
When an ES is deleted and re-added bgpd can start sending MAC-IP sync updates
before the dataplane and zebra have setup the VLAN membership for the ES. Such
MAC entries are not installed in the dataplane till the ES-EVI is created.
Ticket: #2668488
Signed-off-by: Anuradha Karuppiah <anuradhak@nvidia.com>
In the window immediately after an ES deletion bgpd can send MAC-IP updates
using that ES. Zebra needs to ignore these updates to prevent creation
of stale entries.
Ticket: #2668488
Signed-off-by: Anuradha Karuppiah <anuradhak@nvidia.com>
This addresses deletion of ES interfaces that are were not completely
configured.
Ticket: #2668488
Signed-off-by: Anuradha Karuppiah <anuradhak@nvidia.com>
When PTM sends a "cbl status" message it specifies the interface name
but not the VRF name. It is fine for VRF-lite, but doesn't work for
netns because it's possible to have multiple interfaces with the same
name. Be more restrictive in this case and return an error instead of
randomly using of the interface with the specified name.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
With netns VRF backend, we may have multiple interfaces with the same
name. Currently, the function output is not deterministic in this case,
it returns the first interface that it finds in the list. Be more
explicit and tell the user that we need the VRF name.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
```
exit1-debian-9# show ip route 172.16.16.1/32
Routing entry for 172.16.16.1/32
Known via "bgp", distance 20, metric 0, best
Last update 00:00:28 ago
* 192.168.0.2, via eth1, weight 1
AS-Path : 65003
Communities : first 65001:2 65001:3
Large-Communities: 65001:1:1 65001:1:2 65001:1:3
Selection reason : First path received
```
Signed-off-by: Donatas Abraitis <donatas.abraitis@gmail.com>
Currently, the ll_type is set only in `netlink_interface` which is
executed only during startup. If the interface is created when the FRR
is already running, the type is not stored.
Fixes#1164.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
When a client sends to zebra that GR mode is being turned
on. The client also passes down the time zebra should hold
onto the routes. Display this time with the output
of the `show zebra client` command as well.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
When issuing the `show zebra client` command data about
Graceful Restart state is being printed 2 times.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
In startup, zebra would dump interface information from Kernel in 3
steps w/o lock: step1, get interface information; step2, get interface
ipv4 address; step3, get interface ipv6 address.
If any interface gets added after step1, but before step2/3, zebra
would get extra interface addresses in step2/3 that has not been added
into zebra in step1. Returning error in the referenced interface lookup
would cause the startup interface retrieval to be incomplete.
Signed-off-by: Yuan Yuan <yyuanam@amazon.com>
