On Thu, Sep 25, 2025 at 8:21 AM Ales Musil via dev
<ovs-dev@openvswitch.org> wrote:
>
> That function is misleading as the type isn't guaranteed to be
> always LRP. The only place where this function was used knew about
> this hidden logic and did a lookup the lookup twice anyway. Let's
> skip this micro optimization whatsoever and do the lookup twice
> when needed.
>
> Signed-off-by: Ales Musil <amu...@redhat.com>
I agree with the function name not being very intuitive. When I added
this function, I meant a port binding
which is of type router. If you see, we have a logical switch port of
type "router". This function doesn't
say if the corresponding logical port of the "port_binding" in the NB
DB is a _logical_router_port_ or not, but it indicates
if it is a router port (which can belong to a logical switch or router).
With this patch, whenever a port binding (irrespective of type) gets
updated we will lookup the lr_map first and then ls_map
and we are introducing an extra cost of look up. Which is not the
case without this patch. For VIF port bindings we will only lookup in
the ls_map.
If we don't want to use this function, my suggestion would be for
northd to write "datapath=router" or "datapath=switch" in the
external_ids of port bindings.
This way we can do a lookup in the proper map when handling port
binding changes.
Thanks
Numan
> ---
> lib/ovn-util.c | 28 ----------------------------
> lib/ovn-util.h | 1 -
> northd/northd.c | 24 +++++++++---------------
> 3 files changed, 9 insertions(+), 44 deletions(-)
>
> diff --git a/lib/ovn-util.c b/lib/ovn-util.c
> index 6c7629e6d..7b77f838f 100644
> --- a/lib/ovn-util.c
> +++ b/lib/ovn-util.c
> @@ -1283,34 +1283,6 @@ get_lport_type_str(enum en_lport_type lport_type)
> OVS_NOT_REACHED();
> }
>
> -bool
> -is_pb_router_type(const struct sbrec_port_binding *pb)
> -{
> - enum en_lport_type lport_type = get_lport_type(pb);
> -
> - switch (lport_type) {
> - case LP_PATCH:
> - case LP_CHASSISREDIRECT:
> - case LP_L3GATEWAY:
> - case LP_L2GATEWAY:
> - case LP_REMOTE:
> - return true;
> -
> - case LP_VIF:
> - case LP_CONTAINER:
> - case LP_MIRROR:
> - case LP_VIRTUAL:
> - case LP_LOCALNET:
> - case LP_LOCALPORT:
> - case LP_VTEP:
> - case LP_EXTERNAL:
> - case LP_UNKNOWN:
> - return false;
> - }
> -
> - return false;
> -}
> -
> void
> sorted_array_apply_diff(const struct sorted_array *a1,
> const struct sorted_array *a2,
> diff --git a/lib/ovn-util.h b/lib/ovn-util.h
> index 67fc3882d..4c686aac9 100644
> --- a/lib/ovn-util.h
> +++ b/lib/ovn-util.h
> @@ -433,7 +433,6 @@ enum en_lport_type {
>
> enum en_lport_type get_lport_type(const struct sbrec_port_binding *);
> char *get_lport_type_str(enum en_lport_type lport_type);
> -bool is_pb_router_type(const struct sbrec_port_binding *);
>
> /* A wrapper that holds sorted arrays of strings. */
> struct sorted_array {
> diff --git a/northd/northd.c b/northd/northd.c
> index fe5199a86..e1d01df50 100644
> --- a/northd/northd.c
> +++ b/northd/northd.c
> @@ -4982,23 +4982,17 @@ northd_handle_sb_port_binding_changes(
> const struct sbrec_port_binding *pb;
> static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
> SBREC_PORT_BINDING_TABLE_FOR_EACH_TRACKED (pb, sbrec_port_binding_table)
> {
> - bool is_router_port = is_pb_router_type(pb);
> - struct ovn_port *op = NULL;
> -
> - if (is_router_port) {
> - /* A router port binding 'pb' can belong to
> - * - a logical switch port of type router or
> - * - a logical router port.
> - *
> - * So, first search in lr_ports hmap. If not found, search in
> - * ls_ports hmap.
> - * */
> - op = ovn_port_find(lr_ports, pb->logical_port);
> - }
> -
> + bool is_router_port = true;
> + /* A router port binding 'pb' can belong to
> + * - a logical switch port of type router or
> + * - a logical router port.
> + *
> + * So, first search in lr_ports hmap. If not found, search in
> + * ls_ports hmap.
> + * */
> + struct ovn_port *op = ovn_port_find(lr_ports, pb->logical_port);
> if (!op) {
> op = ovn_port_find(ls_ports, pb->logical_port);
> -
> if (op) {
> is_router_port = false;
> }
> --
> 2.51.0
>
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