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Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , Aaron Conole , linux-kernel@vger.kernel.org, Minxi Hou Subject: [PATCH 2/2] tools: ynl: add unicast notification receive support Date: Sun, 17 May 2026 16:33:58 +0800 Message-ID: <20260517083358.2088599-3-houminxi@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260517083358.2088599-1-houminxi@gmail.com> References: <20260517083358.2088599-1-houminxi@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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)) + def set_recv_dbg(self, enabled): self._recv_dbg = enabled -- 2.53.0