From patchwork Thu Oct 1 18:30:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jakub Kicinski X-Patchwork-Id: 267166 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 34D75C4741F for ; Thu, 1 Oct 2020 18:31:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C7CE3208C7 for ; Thu, 1 Oct 2020 18:31:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601577098; bh=KXXII5hj+4KSdSDI64d/kqUl1qwF0KNGBK7vKhq6Ph0=; h=From:To:Cc:Subject:Date:List-ID:From; b=UyWSy8Ot8srMMEKzh/a4oH/NlbV/qM1WDIngs5LTWEj0jOLvhwMirMtRDxH9pY90J TMGuCrp5/4D4/r+dKRygmQBpRg+zrxdfs5b9PdBzR1/wtIxUJzVFIP4lvXRnS1fQXG JkVZiZ2ZVr2eCbbbW7Q/4TD0Qd29BgWQ3eQKhw2k= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732535AbgJASbg (ORCPT ); Thu, 1 Oct 2020 14:31:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:41870 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730070AbgJASbg (ORCPT ); Thu, 1 Oct 2020 14:31:36 -0400 Received: from kicinski-fedora-PC1C0HJN.thefacebook.com (unknown [163.114.132.6]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0387E20706; Thu, 1 Oct 2020 18:31:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601577095; bh=KXXII5hj+4KSdSDI64d/kqUl1qwF0KNGBK7vKhq6Ph0=; h=From:To:Cc:Subject:Date:From; b=i6zI2aTwCGTnEVKARoFmHnpNuPqT+ln8erQiYDrKu8+ea0HvVkLEBsYV9Vth88BRV AXyW0jlCDlwmBirDf5mHnvdOFTMT6C8eu4bZ9KRb13/+q+YGLP9mt9pPTdOFDgkVQm EF2LyWJPzsEcjMuKZ09qw9CP4rHduNA7zyHgXfW4= From: Jakub Kicinski To: davem@davemloft.net Cc: netdev@vger.kernel.org, andrew@lunn.ch, johannes@sipsolutions.net, jiri@resnulli.us, mkubecek@suse.cz, dsahern@kernel.org, pablo@netfilter.org, Jakub Kicinski Subject: [PATCH net-next 0/9] genetlink: support per-command policy dump Date: Thu, 1 Oct 2020 11:30:07 -0700 Message-Id: <20201001183016.1259870-1-kuba@kernel.org> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hi! The objective of this series is to dump ethtool policies to be able to tell which flags are supported by the kernel. Current release adds ETHTOOL_FLAG_STATS for dumping extra stats, but because of strict checking we need to make sure that the flag is actually supported before setting it in a request. Ethtool policies are per command, and so far only dumping family policies was supported. The series adds new set of "light" ops to genl families which don't have all the callbacks, and won't have the policy. Most of families are then moved to these ops. This gives us 4096B in savings on an allyesconfig build (not counting the growth that would have happened when policy is added): text data bss dec hex 244415581 227958581 78372980 550747142 20d3bc06 244415581 227962677 78372980 550751238 20d3cc06 Next 5 patches deal the dumping per-op policy. v1: - replace remaining uses of "light" with "small" (patch 2) - fix dump (ops can't be on the stack there) (patch 2) - coding changes in patch 4 - new patch 7 - don't echo op in responses - to make dump all easier (patch 9) Dave - this series will cause a very trivial conflict with the patch I sent to net. Both sides add some kdoc to struct genl_ops so we'll need to keep it all. I'm sending this already because I also need to restructure ethool policies in time for 5.10 if we want to use it for the stats flag. Jakub Kicinski (9): genetlink: reorg struct genl_family genetlink: add small version of ops genetlink: move to smaller ops wherever possible genetlink: add a structure for dump state genetlink: use .start callback for dumppolicy genetlink: bring back per op policy taskstats: move specifying netlink policy back to ops genetlink: use per-op policy for CTRL_CMD_GETPOLICY genetlink: allow dumping command-specific policy drivers/block/nbd.c | 6 +- drivers/net/gtp.c | 6 +- drivers/net/ieee802154/mac802154_hwsim.c | 6 +- drivers/net/macsec.c | 6 +- drivers/net/team/team.c | 6 +- drivers/net/wireless/mac80211_hwsim.c | 6 +- drivers/target/target_core_user.c | 6 +- drivers/thermal/thermal_netlink.c | 8 +- fs/dlm/netlink.c | 6 +- include/net/genetlink.h | 67 +++++-- include/net/netlink.h | 9 +- include/uapi/linux/genetlink.h | 1 + kernel/taskstats.c | 36 +--- net/batman-adv/netlink.c | 6 +- net/core/devlink.c | 6 +- net/core/drop_monitor.c | 6 +- net/hsr/hsr_netlink.c | 6 +- net/ieee802154/netlink.c | 6 +- net/ipv4/fou.c | 6 +- net/ipv4/tcp_metrics.c | 6 +- net/l2tp/l2tp_netlink.c | 6 +- net/mptcp/pm_netlink.c | 6 +- net/ncsi/ncsi-netlink.c | 6 +- net/netfilter/ipvs/ip_vs_ctl.c | 6 +- net/netlabel/netlabel_calipso.c | 6 +- net/netlabel/netlabel_cipso_v4.c | 6 +- net/netlabel/netlabel_mgmt.c | 6 +- net/netlabel/netlabel_unlabeled.c | 6 +- net/netlink/genetlink.c | 228 ++++++++++++++++------- net/netlink/policy.c | 29 +-- net/openvswitch/conntrack.c | 6 +- net/openvswitch/datapath.c | 24 +-- net/openvswitch/meter.c | 6 +- net/psample/psample.c | 6 +- net/tipc/netlink_compat.c | 6 +- net/wimax/stack.c | 6 +- net/wireless/nl80211.c | 5 + 37 files changed, 343 insertions(+), 232 deletions(-)