Track 'down' state of connected addresses with a new flag. We
may have multiple addresses on an interface that share a prefix;
in those cases, we need to determine when the first address
is valid, to install a connected route, and similarly detect
when the last address goes 'down', to remove the connected
route.
Signed-off-by: Mark Stapp <mjs@voltanet.io>
if_netlink.c created it's on nested parsing #define which
is identical to netlink_parse_rtattr_nested. Consolidate
on one instead of having this duality.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
In order to parse the netlink message into the
`struct rtattr *tb[size]` it is assumed that the buffer is
memset to 0 before the parsing. As such if you attempt
to read a value that was not returned in the message
you will not crash when you test for it.
The code has places were we memset it and places where we don't.
This *will* lead to crashes when the kernel changes. In
our parsing routines let's have them memset instead of having
to remember to do it pre pass in to the parser.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
When clagd is stopped on secondary device,
all vxlan interfaces (vnis) are kept in protodown state.
FRR treats protodown vxlan interfaces (vnis) as interface down
and sends vni delete to bgpd.
In the event of clagd down, SVIs are flapping as underlying
bridge is going through churn.
When FRR receives SVI up notification do not trigger event to bgpd
if vnis are operationaly down.
Ticket:#2600210 CM-22929
Reviewed By:CCR-11544
Testing Done:
Performed CLAG stop/start on secondary device, all vxlan devices
remained in protodown along with this validated the vnis are cleaned up
and added back in bgpd.
Signed-off-by: Chirag Shah <chirag@nvidia.com>
Description:
Added a new show command("show ip zebra route dump") to dump all routes
with detailed information including nexthops,flags, status ..etc.
This helps for dubugging and added to support_bundle_command.conf.
Defined this command as a hidden command.
Signed-off-by: Rajesh Girada <rgirada@vmware.com>
When creating a large number of vrf's we are creating a fairly
large number of hash tables per vrf. Reduce memory usage on
startup as well as let us identify the table these things come
from.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
We are creating 2 hash tables per vni in zebra. Once we start to
scale the number of vni's we start to see some serious memory
usage in zebra. Let's reduce the memory usage at startup
for scale of vni's.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
Current code has an inconsistent behavior with redistribute routes.
Suppose you have a kernel route that is being read w/ a distance
of 255:
eva# show ip route kernel
Codes: K - kernel route, C - connected, S - static, R - RIP,
O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP,
F - PBR, f - OpenFabric,
> - selected route, * - FIB route, q - queued, r - rejected, b - backup
t - trapped, o - offload failure
K>* 0.0.0.0/0 [0/100] via 192.168.161.1, enp39s0, 00:06:39
K>* 4.4.4.4/32 [255/8192] via 192.168.161.1, enp39s0, 00:01:26
eva#
If you have redistribution already turned on for kernel routes
you will be notified of the 4.4.4.4/32 route. If you turn
on kernel route redistribution watching after the 4.4.4.4/32 route
has been read by zebra you will never learn of it.
There is no need to look for infinite distance in the redistribution
code. Either we are selected or not. In other words non kernel routes
with an 255 distance are never installed so the checks were pointless.
So let's just remove the distance checking and tell interested parties
about the 255 kernel route if it exists.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
Currently FRR reads the kernel for interface state and FRR
creates a connected route per address on an interface. If
you are in a situation where you have multiple addresses
on an interface just create 1 connected route for them:
sharpd@eva:/tmp/topotests$ vtysh -c "show int dummy302"
Interface dummy302 is up, line protocol is up
Link ups: 0 last: (never)
Link downs: 0 last: (never)
vrf: default
index 3279 metric 0 mtu 1500 speed 0
flags: <UP,BROADCAST,RUNNING,NOARP>
Type: Ethernet
HWaddr: aa:4a:ed:95:9f:18
inet 10.4.1.1/24
inet 10.4.1.2/24 secondary
inet 10.4.1.3/24 secondary
inet 10.4.1.4/24 secondary
inet 10.4.1.5/24 secondary
inet6 fe80::a84a:edff:fe95:9f18/64
Interface Type Other
Interface Slave Type None
protodown: off
sharpd@eva:/tmp/topotests$ vtysh -c "show ip route connected"
Codes: K - kernel route, C - connected, S - static, R - RIP,
O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP,
F - PBR, f - OpenFabric,
> - selected route, * - FIB route, q - queued, r - rejected, b - backup
t - trapped, o - offload failure
C>* 10.4.1.0/24 is directly connected, dummy302, 00:10:03
C>* 192.168.161.0/24 is directly connected, enp39s0, 00:10:03
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
Since _rnode_zlog was wrapping zlog(), these messages weren't getting an
unique ID assigned through the xref mechanism. Replace macro with a
small extension that prints (almost) the same thing.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
Initially the reading of the speed of an interface happened
upon interface creation and happened until the speed of a link
settled down to a single value. The speed of an interface
can also change as that a new optic can be inserted that
changes the speed, in which case FRR would see a interface
down (optic removal) and then a interface up (optic insertion).
In this case FRR would not treat this as an event that changed
the speed. Let's expand the checking a bit more.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
- gre keys are collected and stored locally.
- when gre source set is requested, and the link interface
configured is different, the gre information collected is
pushed in the query, namely source ip or gre keys if present.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
preserve mtu upon interface flapping and tunnel source change.
Signed-off-by:Reuben Dowle <reuben.dowle@4rf.com>
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
This action is initiated by nhrp and has been stubbed when
moving to zebra. Now, a netlink request is forged to set
the link interface of a gre interface if that gre interface
does not have already a link interface.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
zebra is able to get information about gre tunnels.
zebra_gre file is created to handle hooks, but is not yet used.
also, debug zebra gre command is done to add gre traces.
A zebra_gre file is used for complementary actions that may be needed.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
when zebra has vrf backend mapped to namespaces, the polling
of interfaces leads to fix all linkages of interfaces. This
was not done on non default namespace. do it for other namespaces.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
There are cases where either link information is not present at
interface creation or link information changed. handle this
situation.
Signed-off-by: Philippe.Guibert <philippe.guibert@6wind.com>
zebra dd link
a) `debug zebra kernel` turns off `debug zebra kernel msgdump....`
this is odd and bad
b) `debug zebra kernel msgdump send` turns off receive and vice versa
this is counter intuitive as well
c) `no zebra kernel msgdump ...` turns off all kernel level debugging
we should only turn off msgdump specific debugs
d) `no debug zebra kernel` turns off all kernel level debugging
we should leave msgdump on.
e) Fix `show run` and show debug output
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
encoding signed int as unsigned is bad practice; since we want to do
it here lets at least be explicit about it
Signed-off-by: Quentin Young <qlyoung@nvidia.com>
Use unsigned value for all RA requests to Zebra
- encoding signed int as unsigned is bad practice
- RA interval is never, and should never be, negative
Signed-off-by: Quentin Young <qlyoung@nvidia.com>
This is always a 16 bit unsigned value.
- signed int is the wrong type to use
- encoding a signed int as a uint32 is bad practice
- decoding a signed int encoded as a uint32 into a uint16 is bad
practice
Signed-off-by: Quentin Young <qlyoung@nvidia.com>
We're firing an event debug log for zebra_redistribute_add, but not one
for zebra_redistribute_delete. Let's make it symmetric.
Signed-off-by: Emanuele Di Pascale <emanuele@voltanet.io>
`config.h` has all the defines from autoconf, which may include things
that switch behavior of other included headers (e.g. _GNU_SOURCE
enabling prototypes for additional functions.)
So, the first include in any `.c` file must be either `config.h` (with
the appropriate guard) or `zebra.h` (which includes `config.h` first
thing.)
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
Properly handle refcounting of Proto-owned NHGs when
zebra is operating under graceful restart and retain
conditions.
We have an extra refcnt of 1 we keep for proto-owned NHGs to
indicate the upper level proto has created and owns it.
When we are reading these in from the kernel, we need to set them
to 1 as appropriate. Without this, we fail in the assert() during
zebra_nhg_proto_add() after the owning daemons resends the NHG
and the refcnts are off by one.
Also add in the same logic we use for routes when sweeping with
respect to uptimes.
Signed-off-by: Stephen Worley <sworley@nvidia.com>
Add uptime for use with NHEs to keep track of how
long we have had this NHE in our rib without an update.
This is treated exactly the same as the re->uptime for
routes. When we get an update for a route, we reset the
uptime.
Signed-off-by: Stephen Worley <sworley@nvidia.com>
Add a PROTO_OWNED macro for code readability when checking
ID bounds for whether a NHG is proto owned.
Signed-off-by: Stephen Worley <sworley@nvidia.com>
Handle SR-TE policy changes in the LSP async notification
handler, as we do in the normal LSP dplane results handler.
Signed-off-by: Mark Stapp <mjs@voltanet.io>
When capturing backup nexthops with recursive resolution,
ensure that inner labels from the recursive nexthop are
included in each backup (as they are with the resolving
primary nexthops).
Signed-off-by: Mark Stapp <mjs@voltanet.io>
`CFLAGS` is a "user variable", not intended to be controlled by
configure itself. Let's put all the "important" stuff in AC_CFLAGS and
only leave debug/optimization controls in CFLAGS.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
... by referencing all autogenerated headers relative to the root
directory. (90% of the changes here is `version.h`.)
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
Use the main zebra workqueue for daemon-owned NHGs, in addition
to processing kernel-owned NHGs. The zapi message processing
creates a temporary object that's enqueued to the workqueue,
then processed/installed as part of the workqueue processing.
Signed-off-by: Mark Stapp <mjs@voltanet.io>
do not add a new route type, and consider 0 as a value meaning
that zebra should be the owner.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
zapi_nbr structure is renamed to zapi_neigh_ip.
Initially used to set a neighbor ip entry for gre interfaces, this
structure is used to get events from the zebra layer to nhrp layer.
The ndm state has been added, as it is needed on both sides.
The zebra dplane layer is slightly modified.
Also, to clarify what ZEBRA_NEIGH_ADD/DEL means, a rename is done:
it is called now ZEBRA_NEIGH_IP_ADD/DEL, and it signified that this
zapi interface permits to set link operations by associating ip
addresses to link addresses.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
The first change in this commit is the processing of the VRF termination.
When we terminate the VRF, we should not delete the underlying interfaces,
because there may be pointers to them in the northbound configuration. We
should move them to the default VRF instead.
Because of the first change, the VRF interface itself is also not deleted
when deleting the VRF. It should be handled in netlink_link_change. This
is done by the second change.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
Most of these are many, many years out of date. All of them vary
randomly in quality. They show up by default in packages where they
aren't really useful now that we use integrated config. Remove them.
The useful ones have been moved to the docs.
Signed-off-by: Quentin Young <qlyoung@nvidia.com>
Instead of directly configuring the neighbor table after read from zapi
interface, a zebra dplane context is prepared to host the interface and
the family where the neighbor table is updated. Also, some other fields
are hosted: app_probes, ucast_probes, and mcast_probes. More information
on those fields can be found on ip-ntable configuration.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
EVPN neighbor operations were already done in the zebra dataplane
framework. Now that NHRP is able to use zebra to perform neighbor IP
operations (by programming link IP operations), handle this operation
under dataplane framework:
- assign two new operations NEIGH_IP_INSTALL and NEIGH_IP_DELETE; this
is reserved for GRE like interfaces:
example: ip neigh add A.B.C.D lladdr E.F.G.H
- use 'struct ipaddr' to store and encode the link ip address
- reuse dplane_neigh_info, and create an union with mac address
- reuse the protocol type and use it for neighbor operations; this
permits to store the daemon originating this neighbor operation.
a new route type is created: ZEBRA_ROUTE_NEIGH.
- the netlink level functions will handle a pointer, and a type; the
type indicates the family of the pointer: AF_INET or AF_INET6 if the
link type is an ip address, mac address otherwise.
- to keep backward compatibility with old queries, as no extension was
done, an option NEIGH_NO_EXTENSION has been put in place
- also, 2 new state flags are used: NUD_PERMANENT and NUD_FAILED.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
neighbor table api in zebra is added. a netlink api is created for that.
the handler is called from the api defined in the previous commit.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
When netlink_neigh_update() is called, the link registration was
failing, due to bad request length.
Also, the query was failing if NDA_DST was an ipv6 address.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
a zebra api is extended to offer ability to add or remove neighbor
entry from daemon. Also this extension makes possible to add neigh
entry, not only between IPs and macs, but also between IPs and NBMA IPs.
This API supports configuring ipv6/ipv4 entries with ipv4/ipv6 lladdr.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
zebra implements zebra api for configuring link layer information. that
can be an arp entry (for ipv4) or ipv6 neighbor discovery entry. This
can also be an ipv4/ipv6 entry associated to an underlay ipv4 address,
as it is used in gre point to multipoint interfaces.
this api will also be used as monitoring. an hash list is instantiated
into zebra (this is the vrf bitmap). each client interested in those entries
in a specific vrf, will listen for following messages: entries added, removed,
or who-has messages.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
Optionally hide route changes that only involve backup nexthop
activation/deactivation. The goal is to avoid route churn during
backup nexthop switchover events, before the resolving routes
re-converge. A UI config enables this 'hiding' behavior.
Signed-off-by: Mark Stapp <mjs@voltanet.io>
Description:
After FRR restart, routes are not getting redistributed;
when routes added first and then 'redistribute static' cmd is issued.
During the frr restart, vrf_id will be unknown,
so irrespective of redistribution, we set the redistribute vrf bitmap.
Later, when we add a route and then issue 'redistribute' cmd,
we check the redistribute vrf bitmap and return CMD_WARNING;
zebra_redistribute_add also checks the redistribute vrf bitmap and returns.
Instead of checking the redistribute vrf bitmap, always set it anyways.
Co-authored-by: Santosh P K <sapk@vmware.com>
Co-authored-by: Kantesh Mundaragi <kmundaragi@vmware.com>
Signed-off-by: Abhinay Ramesh <rabhinay@vmware.com>
When certain events occur (connected route changes e.g.)
zebra examines LSPs to see if they might have been affected. For
LSPs with backup nhlfes, skip this immediate processing and
wait for the owning protocol daemon to react.
Signed-off-by: Mark Stapp <mjs@voltanet.io>
This commit introduces the implementation for the north-bound
callbacks for the zebra-specific route-map match and set clauses.
Signed-off-by: NaveenThanikachalam <nthanikachal@vmware.com>
Signed-off-by: Sarita Patra <saritap@vmware.com>
This is to fix the crash reproduced by the following steps:
* ip link add red type vrf table 1
Creates VRF.
* vtysh -c "conf" -c "vrf red"
Creates VRF NB node and marks VRF as configured.
* ip route 1.1.1.0/24 2.2.2.2 vrf red
* no ip route 1.1.1.0/24 2.2.2.2 vrf red
(or similar l3vni set/unset in zebra)
Marks VRF as NOT configured.
* ip link del red
VRF is deleted, because it is marked as not configured, but NB node
stays.
Subsequent attempt to configure something in the VRF leads to a crash
because of the stale pointer in NB layer.
Fixes#8357.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
EVPN nexthops are installed as remote neighs by zebra. This was earlier
done only via VRF IPvX uni routes imported from EVPN routes.
With EVPN-MH these VRF routes now reference a L3NHG which is setup based
on the EAD and doesn't include the RMAC. To workaround that BGP now
consolidates and maintains EVPN nexthops which are then sent to zebra.
zebra sets up these nexthops as L3-VNI nh entries using a dummy type-1
route as reference.
Ticket: CM-31398
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
This one also needed a bit of shuffling around, but MTYPE_RE is the only
one left used across file boundaries now.
Signed-off-by: David Lamparter <equinox@diac24.net>
Back when I put this together in 2015, ISO C11 was still reasonably new
and we couldn't require it just yet. Without ISO C11, there is no
"good" way (only bad hacks) to require a semicolon after a macro that
ends with a function definition. And if you added one anyway, you'd get
"spurious semicolon" warnings on some compilers...
With C11, `_Static_assert()` at the end of a macro will make it so that
the semicolon is properly required, consumed, and not warned about.
Consistently requiring semicolons after "file-level" macros matches
Linux kernel coding style and helps some editors against mis-syntax'ing
these macros.
Signed-off-by: David Lamparter <equinox@diac24.net>
The point of the `-std=gnu99` was to override a `-std=c99` that may be
coming in from net-snmp. However, we want C11, not C99.
Signed-off-by: David Lamparter <equinox@diac24.net>
Add a control and api for the use of backup nexthops in
recursive resolution. With 'no', we won't try to use installed
backup nexthops when resolving a recursive route.
Signed-off-by: Mark Stapp <mjs@voltanet.io>
Zebra routing tables are not controlled by the user and can not be
created/deleted manually. Current NB create/destroy callbacks are
incorrectly implemented because instead of creating/deleting the RIB
they are only checking for it's existence. YANG model should reflect
the real situation.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
There are places in the code where function nb_running_get_entry is used
with abort_if_not_found set to true during the config validation stage.
This is incorrect because when used in transactional CLI, the running
entry won't be set until the apply stage, and such usage leads to crash.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
like it has been done for iptable contexts, a zebra dplane context is
created for each ipset/ipset entry event. The zebra_dplane_ctx job is
then enqueued and processed by separate thread. Like it has been done
for zebra_pbr_iptable context, the ipset and ipset entry contexts are
encapsulated into an union of structures in zebra_dplane_ctx.
There is a specificity in that when storing ipset_entry structure, there
was a backpointer pointer to the ipset structure that is necessary
to get some complementary information before calling the hook. The
proposal is to use an ipset_entry_info structure next to the ipset_entry,
in the zebra_dplane context. That information is used for ipset_entry
processing. The ipset name and the ipset type are the only fields
necessary.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
