From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2A1081FB3; Tue, 27 May 2025 17:46:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748368003; cv=none; b=Rc2QI+C/Ok9FZLSpVPQrFBP1zVJTVrGGcW/PuWLK/kLOoJ+qK6eTV4MPTKXkwPjkTn/47OnDx8ffX22SqMiiRd+wxj+rtWFhvzKBrT+Ph5km7Yyr19dAaqbRCjehjRB+frL9XXPfqO1nEdwiBsV0fVnCJQkCAITuBD9+BAYb9l4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748368003; c=relaxed/simple; bh=9Mx+IcKdXqbLFHdPXAvLICXGA1Ug/tDhHU7AjjCkgTM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=R83ZlkRvdCtgK2lWRBCql+zTvtVKfz+FvqVYYC43bzFYi3Ujx6TNIG8inXh9KftpDwXvpjidRvKMcnZ+SJ0UshmlKWZg6LSJpG6HT++1/HdrvfgHH3uupX6nCQFlk1bsb84ZoyAFULtFSIAjKXEGGrALAFKXTZ8jzYg19ICUhLE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=MXeU0H6z; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="MXeU0H6z" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A8939C4CEE9; Tue, 27 May 2025 17:46:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1748368003; bh=9Mx+IcKdXqbLFHdPXAvLICXGA1Ug/tDhHU7AjjCkgTM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MXeU0H6zMH5AeEFG4n1EQLXMwnN8YyvgVOcXN/ML6ICTaD2EXmbk18trYVwBlUE1Z H7IQfCjy46WtipPpVta3af63TmB9Z6oyT0iGz5xDDl8Ox+Pm7bpNzLuBWU9GyIxjHu tkBuXguHU72NyHrjMn25z4wzhLX/KgdjlQTBtuH4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Petr Machata , Ido Schimmel , Nikolay Aleksandrov , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.14 567/783] bridge: mdb: Allow replace of a host-joined group Date: Tue, 27 May 2025 18:26:04 +0200 Message-ID: <20250527162536.232364347@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250527162513.035720581@linuxfoundation.org> References: <20250527162513.035720581@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Petr Machata [ Upstream commit d9e9f6d7b7d0c520bb87f19d2cbc57aeeb2091d5 ] Attempts to replace an MDB group membership of the host itself are currently bounced: # ip link add name br up type bridge vlan_filtering 1 # bridge mdb replace dev br port br grp 239.0.0.1 vid 2 # bridge mdb replace dev br port br grp 239.0.0.1 vid 2 Error: bridge: Group is already joined by host. A similar operation done on a member port would succeed. Ignore the check for replacement of host group memberships as well. The bit of code that this enables is br_multicast_host_join(), which, for already-joined groups only refreshes the MC group expiration timer, which is desirable; and a userspace notification, also desirable. Change a selftest that exercises this code path from expecting a rejection to expecting a pass. The rest of MDB selftests pass without modification. Signed-off-by: Petr Machata Reviewed-by: Ido Schimmel Acked-by: Nikolay Aleksandrov Link: https://patch.msgid.link/e5c5188b9787ae806609e7ca3aa2a0a501b9b5c4.1738685648.git.petrm@nvidia.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- net/bridge/br_mdb.c | 2 +- tools/testing/selftests/net/forwarding/bridge_mdb.sh | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c index 1a52a0bca086d..7e1ad229e1330 100644 --- a/net/bridge/br_mdb.c +++ b/net/bridge/br_mdb.c @@ -1040,7 +1040,7 @@ static int br_mdb_add_group(const struct br_mdb_config *cfg, /* host join */ if (!port) { - if (mp->host_joined) { + if (mp->host_joined && !(cfg->nlflags & NLM_F_REPLACE)) { NL_SET_ERR_MSG_MOD(extack, "Group is already joined by host"); return -EEXIST; } diff --git a/tools/testing/selftests/net/forwarding/bridge_mdb.sh b/tools/testing/selftests/net/forwarding/bridge_mdb.sh index d9d587454d207..8c1597ebc2d38 100755 --- a/tools/testing/selftests/net/forwarding/bridge_mdb.sh +++ b/tools/testing/selftests/net/forwarding/bridge_mdb.sh @@ -149,7 +149,7 @@ cfg_test_host_common() check_err $? "Failed to add $name host entry" bridge mdb replace dev br0 port br0 grp $grp $state vid 10 &> /dev/null - check_fail $? "Managed to replace $name host entry" + check_err $? "Failed to replace $name host entry" bridge mdb del dev br0 port br0 grp $grp $state vid 10 bridge mdb get dev br0 grp $grp vid 10 &> /dev/null -- 2.39.5