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Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , Aaron Conole , linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/2] tools: ynl: add unicast notification receive support In-Reply-To: <20260517083358.2088599-3-houminxi@gmail.com> Date: Mon, 18 May 2026 14:56:45 +0100 Message-ID: References: <20260517083358.2088599-1-houminxi@gmail.com> <20260517083358.2088599-3-houminxi@gmail.com> User-Agent: Gnus/5.13 (Gnus v5.13) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Minxi Hou writes: > Add ntf_listen() method to YnlFamily for binding the netlink > socket without joining a multicast group. This enables receiving > unicast notifications through the existing poll_ntf/check_ntf > path. > > The OVS packet family sends MISS and ACTION upcalls via > genlmsg_unicast() to a per-vport PID rather than through a > multicast group. The existing ntf_subscribe() couples bind() > with setsockopt(ADD_MEMBERSHIP), which does not fit the unicast > case. ntf_listen() provides the bind-only alternative. > > Signed-off-by: Minxi Hou > --- > tools/net/ynl/pyynl/lib/ynl.py | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/tools/net/ynl/pyynl/lib/ynl.py b/tools/net/ynl/pyynl/lib/ynl.py > index f63c6f828735..8f526c683f99 100644 > --- a/tools/net/ynl/pyynl/lib/ynl.py > +++ b/tools/net/ynl/pyynl/lib/ynl.py > @@ -748,6 +748,10 @@ class YnlFamily(SpecFamily): > self.sock.setsockopt(Netlink.SOL_NETLINK, Netlink.NETLINK_ADD_MEMBERSHIP, > mcast_id) > > + def ntf_listen(self): > + """Bind socket for receiving unicast notifications.""" > + self.sock.bind((0, 0)) Can you add ntf_listen to the docstring for YnlFamily under the "Notification API" heading. > + > def set_recv_dbg(self, enabled): > self._recv_dbg = enabled