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[89.24.32.159]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-45da0fe0fecsm51125580f8f.26.2026.05.20.10.23.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 May 2026 10:23:44 -0700 (PDT) From: Ilya Maximets To: netdev@vger.kernel.org Cc: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Donald Hunter , Shuah Khan , Kuniyuki Iwashima , Kees Cook , Adrian Moreno , Jiri Benc , Nicolas Dichtel , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Matteo Perin , Ilya Maximets Subject: [PATCH net v2 3/4] tools: ynl: support listening on all nsids Date: Wed, 20 May 2026 19:22:37 +0200 Message-ID: <20260520172317.175168-4-i.maximets@ovn.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260520172317.175168-1-i.maximets@ovn.org> References: <20260520172317.175168-1-i.maximets@ovn.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit A new method ntf_listen_all_nsid() to enable listening on events from all namespaces. Useful for testing cross-namespace functionality. recv() replaced with recvmsg() to be able to receive NSID through the ancillary data. Assisted-by: OpenCode:claude-opus-4.6 Signed-off-by: Ilya Maximets --- tools/net/ynl/pyynl/lib/ynl.py | 37 +++++++++++++++++++++++++++++----- 1 file changed, 32 insertions(+), 5 deletions(-) diff --git a/tools/net/ynl/pyynl/lib/ynl.py b/tools/net/ynl/pyynl/lib/ynl.py index f63c6f8287359..010aac0c6c67a 100644 --- a/tools/net/ynl/pyynl/lib/ynl.py +++ b/tools/net/ynl/pyynl/lib/ynl.py @@ -42,6 +42,7 @@ class Netlink: SOL_NETLINK = 270 NETLINK_ADD_MEMBERSHIP = 1 + NETLINK_LISTEN_ALL_NSID = 8 NETLINK_CAP_ACK = 10 NETLINK_EXT_ACK = 11 NETLINK_GET_STRICT_CHK = 12 @@ -680,6 +681,7 @@ class YnlFamily(SpecFamily): Notification API: ynl.ntf_subscribe(mcast_name) -- join a multicast group + ynl.ntf_listen_all_nsid() -- listen on all netns ynl.check_ntf() -- drain pending notifications ynl.poll_ntf(duration=None) -- yield notifications @@ -748,6 +750,23 @@ class YnlFamily(SpecFamily): self.sock.setsockopt(Netlink.SOL_NETLINK, Netlink.NETLINK_ADD_MEMBERSHIP, mcast_id) + def ntf_listen_all_nsid(self): + """Enable NETLINK_LISTEN_ALL_NSID to receive notifications from all + namespaces that have an nsid mapped in the current one.""" + self.sock.setsockopt(Netlink.SOL_NETLINK, + Netlink.NETLINK_LISTEN_ALL_NSID, 1) + + @staticmethod + def _decode_nsid(ancdata): + for cmsg_level, cmsg_type, cmsg_data in ancdata: + if (cmsg_level == Netlink.SOL_NETLINK and + cmsg_type == Netlink.NETLINK_LISTEN_ALL_NSID): + nsid = struct.unpack('i', cmsg_data)[0] + if nsid >= 0: + return nsid + return None + return None + def set_recv_dbg(self, enabled): self._recv_dbg = enabled @@ -1235,7 +1254,7 @@ class YnlFamily(SpecFamily): f" when parsing '{attr_spec['name']}'") return raw - def handle_ntf(self, decoded): + def handle_ntf(self, decoded, nsid=None): msg = {} if self.include_raw: msg['raw'] = decoded @@ -1246,15 +1265,22 @@ class YnlFamily(SpecFamily): msg['name'] = op['name'] msg['msg'] = attrs + if nsid is not None: + msg['nsid'] = nsid self.async_msg_queue.put(msg) + def _recvmsg(self, flags=0): + reply, ancdata, _, _ = self.sock.recvmsg(self._recv_size, 4096, flags) + return reply, ancdata + def check_ntf(self): while True: try: - reply = self.sock.recv(self._recv_size, socket.MSG_DONTWAIT) + reply, ancdata = self._recvmsg(socket.MSG_DONTWAIT) except BlockingIOError: return + nsid = self._decode_nsid(ancdata) nms = NlMsgs(reply) self._recv_dbg_print(reply, nms) for nl_msg in nms: @@ -1271,7 +1297,7 @@ class YnlFamily(SpecFamily): print("Unexpected msg id while checking for ntf", decoded) continue - self.handle_ntf(decoded) + self.handle_ntf(decoded, nsid) def poll_ntf(self, duration=None): start_time = time.time() @@ -1335,7 +1361,8 @@ class YnlFamily(SpecFamily): rsp = [] op_rsp = [] while not done: - reply = self.sock.recv(self._recv_size) + reply, ancdata = self._recvmsg() + nsid = self._decode_nsid(ancdata) nms = NlMsgs(reply) self._recv_dbg_print(reply, nms) for nl_msg in nms: @@ -1374,7 +1401,7 @@ class YnlFamily(SpecFamily): # Check if this is a reply to our request if nl_msg.nl_seq not in reqs_by_seq or decoded.cmd() != op.rsp_value: if decoded.cmd() in self.async_msg_ids: - self.handle_ntf(decoded) + self.handle_ntf(decoded, nsid) continue print('Unexpected message: ' + repr(decoded)) continue -- 2.53.0