Store the fd that corresponds to the appropriate `struct nlsock` and pass
that around in the dplane context instead of the pointer to the nlsock.
Modify the kernel_netlink.c code to store in a hash the `struct nlsock`
with the socket fd as the key.
Why do this? The dataplane context is used to pass around the `struct nlsock`
but the zebra code has a bug where the received buffer for kernel netlink
messages from the kernel is not big enough. So we need to dynamically
grow the receive buffer per socket, instead of having a non-dynamic buffer
that we read into. By passing around the fd we can look up the `struct nlsock`
that will soon have the associated buffer and not have to worry about `const`
issues that will arise.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
When using wait for install there exists situations where
zebra will issue several route change operations to the kernel
but end up in a state where we shouldn't be at the end
due to extra data being received. Example:
a) zebra receives from bgp a route change, installs sends the
route to the kernel.
b) zebra receives a route deletion from bgp, removes the
struct route entry and then sends to the kernel a deletion.
c) zebra receives an asynchronous notification that (a) succeeded
but we treat this as a new route.
This is the ships in the night problem. In this case if we receive
notification from the kernel about a route that we know nothing
about and we are not in startup and we are doing asic offload
then we can ignore this update.
Ticket: #2563300
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
Since f60a1188 we store a pointer to the VRF in the interface structure.
There's no need anymore to store a separate vrf_id field.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.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>
Insist on the fact that zclient neighbor state flags are
mapped over netlink state flags. List all the defines
currently known on kernel, and create a netlink API to
convert netlink values to zclient values. The function is
simplified as it is a 1-1 match.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
FRRouting operator can install seg6 route via ZAPI,
But linux kernel operator also can install seg6 route
via Netlink directry (i.e. iproute2)
This commit make zebra to parse non-frr seg6 route
configuration via netlink and audit Zebra's RIB.
Signed-off-by: Hiroki Shirokura <slank.dev@gmail.com>
With this patch, zclient can intall seg6 rotues when
they set properties "nh_seg6_segs" on struct nexthop
and set ZEBRA_FLAG_SEG6_ROUTE on zapi_route's flag.
Signed-off-by: Hiroki Shirokura <slank.dev@gmail.com>
FRRouting operator can install seg6local route via ZAPI,
But linux kernel operator also can install seg6local route
via Netlink directry (i.e. iproute2)
This commit make zebra to parse non-frr seg6local
route configuration via netlink and audit Zebra's RIB.
Signed-off-by: Hiroki Shirokura <slank.dev@gmail.com>
With this patch, zclient can intall seg6local rotues whem
they set properties nh_seg6local_{action,ctx} on struct nexthop
and set ZEBRA_FLAG_SEG6LOCAL_ROUTE on zapi_route's flag.
Signed-off-by: Hiroki Shirokura <slank.dev@gmail.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>
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>
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>
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>
This is causing problems with VM move i.e. transition from remote
neigh to local neigh. This transition involves changing the NUD_STATE
NUD_NOARP to NUD_STALE. And the weak override flag prevents changing
the state from connected (REACHABLE, NOARP, PERMANENT) to STALE.
PS: Weak-override was originally used to prevent race conditions where
FRR can end up making a REACHABLE neigh STALE. We may need to revisit
and address that case at a later point.
Ticket: CM-30273
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
When looking up the conversion from kernel protocol to
internal protocol family make sure we use the correct
AF_INET( what the kernel uses ) instead of AFI_IP (which
is what FRR uses ).
Routes from OSPF will show up from the kernel as OSPF6 instead of
OSPF. Which will cause mayhem
Ticket: CM-33306
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
Neither tabs nor newlines are acceptable in syslog messages. They also
break line-based parsing of file logs.
Signed-off-by: David Lamparter <equinox@diac24.net>
