From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D0248C19F32 for ; Fri, 7 Mar 2025 13:20:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Subject:Cc:To: From:Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=JhRsUH63PXad8fITVdK3UPKSquO0H7HspkXydnx5S/g=; b=WLODykuuQ35HselH1wt5dMD/kW QkdsPi+Fl6yXQ2uPdIMFE9+bsj8wwwOTqMoKu+NtADPIKo12W/XvtcGMnoCGnrRNYPbnGzSP1G5ac uh3jgwnaAMXxXuEw1RNB+nJHdplN9oN/uiSMr/1dLNJCBPIk6xUoZTpkotc+4oHc76tXp9BnVuZKO /R5PP2SYeO7WDTks8tDnv16cATf+rChnozy5P1vi7M3iEpyD5fUWUiTIMloh0pLuOTNIA+ml5tQg/ yxzyhC1gO4TkQNOWskHr1ISNdXiQvTdSzmMgP33O0bTv2hM4csbNbMt4qALlhdqrUqCMjjrT8y4M7 5gQFRB/g==; 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x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgdduuddtjeejucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpeffhffvvefukfgjfhhoofggtgfgsehtjeertdertddvnecuhfhrohhmpeforgigihhmvgcuvehhvghvrghllhhivghruceomhgrgihimhgvrdgthhgvvhgrlhhlihgvrhessghoohhtlhhinhdrtghomheqnecuggftrfgrthhtvghrnhepgeevledtvdevueehhfevhfelhfekveeftdfgiedufeffieeltddtgfefuefhueeknecukfhppedvrgdtudemtggsudelmeekugegtgemlehftddtmegstgdvudemkeekleelmeehgedttgemvgehlegvnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepvdgrtddumegtsgduleemkegugegtmeelfhdttdemsggtvddumeekkeelleemheegtdgtmegvheelvgdphhgvlhhopehfvgguohhrrgdrhhhomhgvpdhmrghilhhfrhhomhepmhgrgihimhgvrdgthhgvvhgrlhhlihgvrhessghoohhtlhhinhdrtghomhdpnhgspghrtghpthhtohepvddtpdhrtghpthhtohephhhorhhmsheskhgvrhhnvghlrdhorhhgpdhrtghpthhtohepuggrvhgvmhesuggrvhgvmhhlohhfthdrnhgvthdprhgtphhtthhopegrnhgurhgvfieslhhunhhnrdgthhdprhgtphhtthhopehku hgsrgeskhgvrhhnvghlrdhorhhgpdhrtghpthhtohepvgguuhhmrgiivghtsehgohhoghhlvgdrtghomhdprhgtphhtthhopehprggsvghnihesrhgvughhrghtrdgtohhmpdhrtghpthhtohephhhkrghllhifvghithdusehgmhgrihhlrdgtohhmpdhrtghpthhtohepnhgvthguvghvsehvghgvrhdrkhgvrhhnvghlrdhorhhg X-GND-Sasl: maxime.chevallier@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250307_051828_439281_C5599DD4 X-CRM114-Status: GOOD ( 32.06 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Simon, On Fri, 7 Mar 2025 12:21:19 +0000 Simon Horman wrote: > On Wed, Mar 05, 2025 at 03:19:31PM +0100, Maxime Chevallier wrote: > > We have a number of netlink commands in the ethnl family that may have > > multiple objects to dump even for a single net_device, including : > > > > - PLCA, PSE-PD, phy: one message per PHY device > > - tsinfo: one message per timestamp source (netdev + phys) > > - rss: One per RSS context > > > > To get this behaviour, these netlink commands need to roll a custom > > ->dumpit(). > > > > To prepare making per-netdev DUMP more generic in ethnl, introduce a > > member in the ethnl ops to indicate if a given command may allow > > pernetdev DUMPs (also referred to as filtered DUMPs). > > > > Signed-off-by: Maxime Chevallier > > --- > > net/ethtool/netlink.c | 45 ++++++++++++++++++++++++++++--------------- > > net/ethtool/netlink.h | 1 + > > 2 files changed, 30 insertions(+), 16 deletions(-) > > > > diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c > > index 734849a57369..0815b28ba32f 100644 > > --- a/net/ethtool/netlink.c > > +++ b/net/ethtool/netlink.c > > @@ -578,21 +578,34 @@ static int ethnl_default_dumpit(struct sk_buff *skb, > > int ret = 0; > > > > rcu_read_lock(); > > - for_each_netdev_dump(net, dev, ctx->pos_ifindex) { > > - dev_hold(dev); > > + if (ctx->req_info->dev) { > > + dev = ctx->req_info->dev; > > rcu_read_unlock(); > > - > > - ret = ethnl_default_dump_one(skb, dev, ctx, genl_info_dump(cb)); > > - > > + /* Filtered DUMP request targeted to a single netdev. We already > > + * hold a ref to the netdev from ->start() > > + */ > > + ret = ethnl_default_dump_one_dev(skb, dev, ctx, > > + genl_info_dump(cb)); > > Hi Maxime, > > ethnl_default_dump_one_dev() is called here but it doesn't exist > until the following patch is applied, which breaks bisection. Yeah I messed-up in my rebase and bisection broke :( I'll send a new version in a few days, as Jakub said, let's give some time for the netdev_lock series to move forward and go through CI, I'll need to rebase on it at some point. > > > rcu_read_lock(); > > - dev_put(dev); > > - > > - if (ret < 0 && ret != -EOPNOTSUPP) { > > - if (likely(skb->len)) > > - ret = skb->len; > > - break; > > + netdev_put(ctx->req_info->dev, &ctx->req_info->dev_tracker); > > + } else { > > + for_each_netdev_dump(net, dev, ctx->pos_ifindex) { > > + dev_hold(dev); > > + rcu_read_unlock(); > > + > > + ret = ethnl_default_dump_one(skb, dev, ctx, > > + genl_info_dump(cb)); > > + > > + rcu_read_lock(); > > + dev_put(dev); > > + > > + if (ret < 0 && ret != -EOPNOTSUPP) { > > + if (likely(skb->len)) > > + ret = skb->len; > > + break; > > + } > > + ret = 0; > > } > > - ret = 0; > > } > > rcu_read_unlock(); > > > > ... > > > diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h > > index ec6ab5443a6f..4db27182741f 100644 > > --- a/net/ethtool/netlink.h > > +++ b/net/ethtool/netlink.h > > @@ -388,6 +388,7 @@ struct ethnl_request_ops { > > unsigned int req_info_size; > > unsigned int reply_data_size; > > bool allow_nodev_do; > > + bool allow_pernetdev_dump; > > nit: allow_pernetdev_dump should also be added to the Kernel doc for > struct ethnl_request_ops > > Flagged by ./scripts/kernel-doc -none > > There also appear to be similar minor issues with subsequent > patches in this series. Ack, I'll make sure the doc is up to date and properly formatted :) Thanks, Maxime > > u8 set_ntf_cmd; > > > > int (*parse_request)(struct ethnl_req_info *req_info, > > -- > > 2.48.1 > >