From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f170.google.com (mail-pf1-f170.google.com [209.85.210.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4CAA8130A73 for ; Fri, 17 Oct 2025 03:03:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.170 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760670202; cv=none; b=hOn/DczJ+UQ7ME+BbFaznRrWhigoZzCIL2Wicn4WP3tn6k3Vsz2WrgcfWx6hTDb8121JdGYT384M5b1PYJ3zGjJxqIk8UP8wz80I+Cg5XggcvHhPSlzrEnSFwL8MCyQ2OedFL9qRbs3rd+IcSN5uVCU0WlORVrHsB2ud+pQOx4Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760670202; c=relaxed/simple; bh=1B4E51onwsNNiRfncFUibshDpTbkfPUB0hQ0l1hmEXU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=gmbhLtisqEZmd4IZ2xmtxclpVdeNtAEBVD1PnRywLIjeE3trX+naZfpj+tJIw2eCxrRKIggqRt5P4sEhzJu4xU0gw13KV6rCz4330Ywye1GhhOsM0CQTijEWIw8k5MvfTGU/scbRMSJYAyNK3K5naLZUmKVtW2+xViy20BvqayU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=duPOScv+; arc=none smtp.client-ip=209.85.210.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="duPOScv+" Received: by mail-pf1-f170.google.com with SMTP id d2e1a72fcca58-789fb76b466so1418167b3a.0 for ; Thu, 16 Oct 2025 20:03:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1760670200; x=1761275000; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=0ZtF98NWa2X51rR/Kih4oN8w/UI8MUbJoL/ouk+zwMU=; b=duPOScv+uvDyngqg7J1VNAzoKoaQ9cSVmbm32+4liSbm1Ki52liKQfRxW12dh75ANX ZyhtPYd65NCBdIFpOO+N59T2WpNpXVarPtYOfe2kjUIvXA7BzZ5+bw7BkQeoTcCaNHrx zVeOh6bo8Z2Gnd5QP6ZoPPK0Zf8Tz+HlPz6EiQivTu7W9qi1/oX3f+Rwh/K1fx06R8HR 5MMk6eXwVmemPSoC0I5FOrc/UxdN5642FTfX4A1C8i62BH9wkIVxydcjvvdiBhkLgrTi AgkHphY2IchQYTobk4Ax7E9Z7Hoj+depBNfF0wPEiNCLCbtYGUNzejWTZSrFLqVwTmhl Hbtg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760670200; x=1761275000; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=0ZtF98NWa2X51rR/Kih4oN8w/UI8MUbJoL/ouk+zwMU=; b=lzFBqDBri1IkWgRVRGIaGtaFnuekkpEq3Zgys8S5U23FwQhlvYmBaCV1ToiC0bUjEt NmgZDUKJi7g3FibXr2NqaEN1Oa6ml1o4RjpWK2CHyhnVXt3gbFG0/vnjRFD81WmiknAC ZLRDBf3+TM2Fsig15AMNBCmY84ktMi2V9zO5c5xh1Rg0FO2mnLrSBu6dOgvETEwKI02t uu/8dNsofS4d0BfHEYYZliq/HhOnDYlZBPYubub7KmgzROLq28WcLAlAKFhKeRO3Pn/9 cfvjkQ7ivOVevETypU5FevgZrmJkXyFyM+9S0GCaZLbXnwpukYcSEf5auf89yLG9YMVn hH1A== X-Gm-Message-State: AOJu0YzdsMpT85PH0Jy8KXP/ZigwUGdQdOBFQ+6oTyAZw5rCUWx4wPCt zEpnqPr1iSiYhsXPZdslhB9oWERrF6DUzcqUdCQAAd7vyAYFcCO/ZXLiIEXtLWRYhLU= X-Gm-Gg: ASbGncsNGJGpDoIMi3KTm2hP0oBtfaUoueXvEB7S49cy3JqO8cuspW3eRDmlC7BRgGI 4ncSUnuQ44Vz0W/0YcH2tV6APS8Uq9IGx3O1gzwGSwf80qvrOLwDThucOHDhrnP1yRC5PSrFyYN 36x8z653bT/V0h6mjM5TCLLFqLVFmlKmwgPOMSdpO3KYwsYqWRsLQheFfYvJfW5YE7FNpIHzxf+ bnBINlZ+xEVGgUJXs3wkemAkGEyDoRu70P/Bef544tb7avaRNgVDS9NZPbi6lO0kigZZAMydsIX wHErNWbnlmvVmRYfMSO4nVNmhLul0nGroLiyIl9Ms5JOrc9h7ABnSFzq0IDv640cGI/l8g41LBg VfF1pcV8CkO6xFeZxyf6S9G+e4Xl7ZhfouQZV+GKUu7OVjZoRY7Fur1T/F8FXoohLulAki8jju8 gMskD/FioLbi8qRiU= X-Google-Smtp-Source: AGHT+IEE2CjQtwKykmr71vE4TiWtSb8glnok2mfsqd6fWZASwTaDzcijb+Z64VK4T/D89eoeF3yUMw== X-Received: by 2002:a17:903:46cd:b0:28e:7fd3:57f2 with SMTP id d9443c01a7336-290cb65ca5emr28692925ad.49.1760670200195; Thu, 16 Oct 2025 20:03:20 -0700 (PDT) Received: from fedora ([209.132.188.88]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29099a7c23fsm46351905ad.74.2025.10.16.20.03.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Oct 2025 20:03:19 -0700 (PDT) From: Hangbin Liu To: netdev@vger.kernel.org Cc: Jay Vosburgh , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Stephen Hemminger , David Ahern , linux-kselftest@vger.kernel.org, Hangbin Liu Subject: [PATCH net-next] bonding: show master index when dumping slave info Date: Fri, 17 Oct 2025 03:03:10 +0000 Message-ID: <20251017030310.61755-1-liuhangbin@gmail.com> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Currently, there is no straightforward way to obtain the master/slave relationship via netlink. Users have to retrieve all slaves through sysfs to determine these relationships. To address this, we can either list all slaves under the bond interface or display the master index in each slave. Since the number of slaves could be quite large (e.g., 100+), it is more efficient to show the master information in the slave entry. Signed-off-by: Hangbin Liu --- drivers/net/bonding/bond_netlink.c | 4 ++++ include/uapi/linux/if_link.h | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/net/bonding/bond_netlink.c b/drivers/net/bonding/bond_netlink.c index 286f11c517f7..ff3f11674a8b 100644 --- a/drivers/net/bonding/bond_netlink.c +++ b/drivers/net/bonding/bond_netlink.c @@ -29,6 +29,7 @@ static size_t bond_get_slave_size(const struct net_device *bond_dev, nla_total_size(sizeof(u16)) + /* IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE */ nla_total_size(sizeof(s32)) + /* IFLA_BOND_SLAVE_PRIO */ nla_total_size(sizeof(u16)) + /* IFLA_BOND_SLAVE_ACTOR_PORT_PRIO */ + nla_total_size(sizeof(u32)) + /* IFLA_BOND_SLAVE_MASTER */ 0; } @@ -38,6 +39,9 @@ static int bond_fill_slave_info(struct sk_buff *skb, { struct slave *slave = bond_slave_get_rtnl(slave_dev); + if (nla_put_u32(skb, IFLA_BOND_SLAVE_MASTER, bond_dev->ifindex)) + goto nla_put_failure; + if (nla_put_u8(skb, IFLA_BOND_SLAVE_STATE, bond_slave_state(slave))) goto nla_put_failure; diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h index 3b491d96e52e..bad41a1807f7 100644 --- a/include/uapi/linux/if_link.h +++ b/include/uapi/linux/if_link.h @@ -1567,6 +1567,7 @@ enum { IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE, IFLA_BOND_SLAVE_PRIO, IFLA_BOND_SLAVE_ACTOR_PORT_PRIO, + IFLA_BOND_SLAVE_MASTER, __IFLA_BOND_SLAVE_MAX, }; -- 2.50.1