From patchwork Tue Oct 8 10:27:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gur Stavi X-Patchwork-Id: 13826168 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) (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 8D7081779B1; Tue, 8 Oct 2024 10:29:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.176.79.56 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728383366; cv=none; b=aZiZWnvP/p0DBpFiKDKUVCYRAvjwimVAKZZOe5vzoGDZDgjKBR2Dymyg/CC2lZuxWMij39ggLDWiQp/vLQVz1Z2KtjcAXV/a68kfpx1DvkWGJeG72XXYRAXXNUIQLkjKZWGPvXz3+r4ywfF67ibZyo5xm5Gf0isnrWeVvA6ePOo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728383366; c=relaxed/simple; bh=pjtIaP4a1Q8eXmJbm5mUwmzGh9nInGfQha9qscS3zLg=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=HSFGbYjht2t52lgNAVDxKmKlFz/fYftp5OnJRVTXgY5aLfJs+yjHN5RU5Wasz3YGg4j/PZxcYRNYP1H3115uBjXnKwrbkJj89CCgHYVahkc84E6jUaW4JCp+gD3d3DKUrwgARHovALVq+h3s8RFoic03cLPNsVGwIcz3dcCSBYo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=185.176.79.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.18.186.31]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4XNC1H5Mxgz6K9Bm; Tue, 8 Oct 2024 18:29:07 +0800 (CST) Received: from frapeml500005.china.huawei.com (unknown [7.182.85.13]) by mail.maildlp.com (Postfix) with ESMTPS id 5C8EB140133; Tue, 8 Oct 2024 18:29:22 +0800 (CST) Received: from china (10.200.201.82) by frapeml500005.china.huawei.com (7.182.85.13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Tue, 8 Oct 2024 12:29:16 +0200 From: Gur Stavi To: Gur Stavi CC: , , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shuah Khan , Willem de Bruijn , Subject: [PATCH net-next v02 1/2] af_packet: allow fanout_add when socket is not RUNNING Date: Tue, 8 Oct 2024 13:27:58 +0300 Message-ID: <05852e3043d2b0a7a5ca51d456e82966dcb72f03.1728382839.git.gur.stavi@huawei.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To frapeml500005.china.huawei.com (7.182.85.13) PACKET socket can retain its fanout membership through link down and up and leave a fanout while closed regardless of link state. However, socket was forbidden from joining a fanout while it was not RUNNING. This patch allows PACKET socket to join fanout while not RUNNING. Signed-off-by: Gur Stavi --- net/packet/af_packet.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index f8942062f776..fb2cca73d953 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -1846,21 +1846,21 @@ static int fanout_add(struct sock *sk, struct fanout_args *args) err = -EINVAL; spin_lock(&po->bind_lock); - if (packet_sock_flag(po, PACKET_SOCK_RUNNING) && - match->type == type && + if (match->type == type && match->prot_hook.type == po->prot_hook.type && match->prot_hook.dev == po->prot_hook.dev) { err = -ENOSPC; if (refcount_read(&match->sk_ref) < match->max_num_members) { - __dev_remove_pack(&po->prot_hook); - /* Paired with packet_setsockopt(PACKET_FANOUT_DATA) */ WRITE_ONCE(po->fanout, match); po->rollover = rollover; rollover = NULL; refcount_set(&match->sk_ref, refcount_read(&match->sk_ref) + 1); - __fanout_link(sk, po); + if (packet_sock_flag(po, PACKET_SOCK_RUNNING)) { + __dev_remove_pack(&po->prot_hook); + __fanout_link(sk, po); + } err = 0; } }