From patchwork Mon Sep 30 13:53:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paolo Abeni X-Patchwork-Id: 13816532 X-Patchwork-Delegate: kuba@kernel.org Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 1D91218FC74 for ; Mon, 30 Sep 2024 13:55:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727704522; cv=none; b=RI/94ISte7H2F7XloLNIyvIap6yiik/C1gKnWwCHr6j2+0NIrh5rXYGo+5XYfamqMV1UtFaE2mZ5gND08Dec5tJgTPDt98eosVCyRZ8NF6MQoY3Xz2Ag6zQyyBfgRwb6uoToYMjhog2g8mDA7KgAn7jgexdQ+sm58J3ypKp+vVg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727704522; c=relaxed/simple; bh=vddy9NWLglMK6oL8m64aoQO+m/cu4fD/IF23fKp7gfY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=efE+up7GjMqZjecdxlB4LKibQ04t/o5drQoTK93em0gK2Y0aVqL0lsP0Zrh7BLiJ4aB0BjCih1ObB1rTE/MCq5sE0M+n5ctLjqw0BgAekr1O44a+ntfXGbaJp1k01RV0fwDwut3fHW+HrLX/1Y2edgP9gMZPWFYoPQbYtldgzmI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=iKD1h8oa; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="iKD1h8oa" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1727704520; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Qsi71Hm1UeUEZ/LQK4aUh57A5qUn9IgPxKBtHb6+cKI=; b=iKD1h8oaMlMWvBrJ4E3QgmMuqDKKnTE+EFC/FzCc7YhigIkOC2bz0J6vbloifX3ij7OiI5 zVHAYQFcY/J4lMu/zH87ZkYpQWEsZFOoKjXEAADYja8myZ0M9Uu2WXWTny8oYPpHTAPfMP 6PoGaMKeaPRfwGSEiltqZdrLWt64d0g= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-564-eOvX5DPxObaPOMt8NCqCkA-1; Mon, 30 Sep 2024 09:55:16 -0400 X-MC-Unique: eOvX5DPxObaPOMt8NCqCkA-1 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (unknown [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 75991193EF48; Mon, 30 Sep 2024 13:55:14 +0000 (UTC) Received: from gerbillo.redhat.com (unknown [10.45.224.210]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 6E3671954B0F; Mon, 30 Sep 2024 13:55:09 +0000 (UTC) From: Paolo Abeni To: netdev@vger.kernel.org Cc: Jakub Kicinski , Jiri Pirko , Madhu Chittim , Sridhar Samudrala , Simon Horman , John Fastabend , Sunil Kovvuri Goutham , Jamal Hadi Salim , Donald Hunter , anthony.l.nguyen@intel.com, przemyslaw.kitszel@intel.com, intel-wired-lan@lists.osuosl.org, edumazet@google.com, Stanislav Fomichev Subject: [PATCH v8 net-next 07/15] net-shapers: implement shaper cleanup on queue deletion Date: Mon, 30 Sep 2024 15:53:54 +0200 Message-ID: <094ea42117070aaacff25145b23feadef53dbfbc.1727704215.git.pabeni@redhat.com> In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 X-Patchwork-Delegate: kuba@kernel.org hook into netif_set_real_num_tx_queues() to cleanup any shaper configured on top of the to-be-destroyed TX queues. Signed-off-by: Paolo Abeni Reviewed-by: Jakub Kicinski --- v6 -> v7: - don't touch the H/W for the queue shaper, the driver is supposed to reset clean it up. - it's up to the net shaper enabled caller to acquire the dev lock --- net/core/dev.c | 2 ++ net/core/dev.h | 4 ++++ net/shaper/shaper.c | 48 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 54 insertions(+) diff --git a/net/core/dev.c b/net/core/dev.c index 1e19797d8edd..35c159161b9f 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2949,6 +2949,8 @@ int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq) if (dev->num_tc) netif_setup_tc(dev, txq); + net_shaper_set_real_num_tx_queues(dev, txq); + dev_qdisc_change_real_num_tx(dev, txq); dev->real_num_tx_queues = txq; diff --git a/net/core/dev.h b/net/core/dev.h index 13c558874af3..d3ea92949ff3 100644 --- a/net/core/dev.h +++ b/net/core/dev.h @@ -37,8 +37,12 @@ void dev_addr_check(struct net_device *dev); #if IS_ENABLED(CONFIG_NET_SHAPER) void net_shaper_flush_netdev(struct net_device *dev); +void net_shaper_set_real_num_tx_queues(struct net_device *dev, + unsigned int txq); #else static inline void net_shaper_flush_netdev(struct net_device *dev) {} +static inline void net_shaper_set_real_num_tx_queues(struct net_device *dev, + unsigned int txq) {} #endif /* sysctls not referred to from outside net/core/ */ diff --git a/net/shaper/shaper.c b/net/shaper/shaper.c index ddd1999b3f27..85ad172833fc 100644 --- a/net/shaper/shaper.c +++ b/net/shaper/shaper.c @@ -1157,6 +1157,54 @@ void net_shaper_flush_netdev(struct net_device *dev) net_shaper_flush(&binding); } +void net_shaper_set_real_num_tx_queues(struct net_device *dev, + unsigned int txq) +{ + struct net_shaper_hierarchy *hierarchy; + struct net_shaper_binding binding; + int i; + + binding.type = NET_SHAPER_BINDING_TYPE_NETDEV; + binding.netdev = dev; + hierarchy = net_shaper_hierarchy(&binding); + if (!hierarchy) + return; + + /* Only drivers implementing shapers support ensure + * the lock is acquired in advance. + */ + lockdep_assert_held(&dev->lock); + + /* Take action only when decreasing the tx queue number. */ + for (i = txq; i < dev->real_num_tx_queues; ++i) { + struct net_shaper_handle handle, parent_handle; + struct net_shaper *shaper; + u32 index; + + handle.scope = NET_SHAPER_SCOPE_QUEUE; + handle.id = i; + shaper = net_shaper_lookup(&binding, &handle); + if (!shaper) + continue; + + /* Don't touch the H/W for the queue shaper, the drivers already + * deleted the queue and related resources. + */ + parent_handle = shaper->parent; + index = net_shaper_handle_to_index(&handle); + xa_erase(&hierarchy->shapers, index); + kfree_rcu(shaper, rcu); + + /* The recursion on parent does the full job. */ + if (parent_handle.scope != NET_SHAPER_SCOPE_NODE) + continue; + + shaper = net_shaper_lookup(&binding, &parent_handle); + if (shaper && !--shaper->leaves) + __net_shaper_delete(&binding, shaper, NULL); + } +} + static int __init shaper_init(void) { return genl_register_family(&net_shaper_nl_family);