From patchwork Thu Nov 13 15:25:15 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jukka Rissanen X-Patchwork-Id: 5298831 Return-Path: X-Original-To: patchwork-linux-wireless@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id F2275C11AC for ; Thu, 13 Nov 2014 15:29:55 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 07343200F0 for ; Thu, 13 Nov 2014 15:29:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E7DA72020E for ; Thu, 13 Nov 2014 15:29:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753930AbaKMP3u (ORCPT ); Thu, 13 Nov 2014 10:29:50 -0500 Received: from mga11.intel.com ([192.55.52.93]:14229 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753898AbaKMP3s (ORCPT ); Thu, 13 Nov 2014 10:29:48 -0500 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 13 Nov 2014 07:29:46 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.07,378,1413270000"; d="scan'208";a="631433369" Received: from jrissane-mobl.ger.corp.intel.com ([10.237.67.33]) by fmsmga002.fm.intel.com with ESMTP; 13 Nov 2014 07:25:19 -0800 From: Jukka Rissanen To: linux-wireless@vger.kernel.org Subject: [PATCH v5 2/2] nl80211: Stop scheduled scan if netlink client disappears Date: Thu, 13 Nov 2014 17:25:15 +0200 Message-Id: <1415892315-2911-3-git-send-email-jukka.rissanen@linux.intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1415892315-2911-1-git-send-email-jukka.rissanen@linux.intel.com> References: <1415892315-2911-1-git-send-email-jukka.rissanen@linux.intel.com> Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Spam-Status: No, score=-7.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP An attribute NL80211_ATTR_SOCKET_OWNER can be set by the scan initiator. If present, the attribute will cause the scan to be stopped if the client dies. Signed-off-by: Jukka Rissanen --- include/net/cfg80211.h | 1 + include/uapi/linux/nl80211.h | 3 +++ net/wireless/core.c | 17 +++++++++++++++++ net/wireless/core.h | 2 ++ net/wireless/nl80211.c | 15 +++++++++++++++ 5 files changed, 38 insertions(+) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 220d5f5..6fa764a 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -1512,6 +1512,7 @@ struct cfg80211_sched_scan_request { struct wiphy *wiphy; struct net_device *dev; unsigned long scan_start; + u32 owner_nlportid; /* keep last */ struct ieee80211_channel *channels[0]; diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index 185f9c7..5038240 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -1640,6 +1640,9 @@ enum nl80211_commands { * @NL80211_ATTR_SOCKET_OWNER: Flag attribute, if set during interface * creation then the new interface will be owned by the netlink socket * that created it and will be destroyed when the socket is closed. + * If set during scheduled scan start then the new scan req will be + * owned by the netlink socket that created it and the scheduled scan will + * be stopped when the socket is closed. * * @NL80211_ATTR_TDLS_INITIATOR: flag attribute indicating the current end is * the TDLS link initiator. diff --git a/net/wireless/core.c b/net/wireless/core.c index a4d2792..6fffcb3 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -320,6 +320,21 @@ static void cfg80211_destroy_iface_wk(struct work_struct *work) rtnl_unlock(); } +static void cfg80211_sched_scan_stop_wk(struct work_struct *work) +{ + struct cfg80211_registered_device *rdev; + + rdev = container_of(work, struct cfg80211_registered_device, + sched_scan_stop_wk); + + rtnl_lock(); + + if (rdev->sched_scan_req) + __cfg80211_stop_sched_scan(rdev, false); + + rtnl_unlock(); +} + /* exported functions */ struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, @@ -406,6 +421,7 @@ use_default_name: INIT_LIST_HEAD(&rdev->destroy_list); spin_lock_init(&rdev->destroy_list_lock); INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); + INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); #ifdef CONFIG_CFG80211_DEFAULT_PS rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; @@ -760,6 +776,7 @@ void wiphy_unregister(struct wiphy *wiphy) flush_work(&rdev->event_work); cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); flush_work(&rdev->destroy_work); + flush_work(&rdev->sched_scan_stop_wk); #ifdef CONFIG_PM if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) diff --git a/net/wireless/core.h b/net/wireless/core.h index 61ee664..1bdffac 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -84,6 +84,8 @@ struct cfg80211_registered_device { struct list_head destroy_list; struct work_struct destroy_work; + struct work_struct sched_scan_stop_wk; + /* must be last because of the way we do wiphy_priv(), * and it should at least be aligned to NETDEV_ALIGN */ struct wiphy wiphy __aligned(NETDEV_ALIGN); diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index df447c0..8ab3610 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -5955,6 +5955,9 @@ static int nl80211_start_sched_scan(struct sk_buff *skb, err = rdev_sched_scan_start(rdev, dev, request); if (!err) { + if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) + request->owner_nlportid = info->snd_portid; + rdev->sched_scan_req = request; nl80211_send_sched_scan(rdev, dev, NL80211_CMD_START_SCHED_SCAN); @@ -12127,6 +12130,12 @@ static int nl80211_netlink_notify(struct notifier_block * nb, list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) { bool schedule_destroy_work = false; + bool schedule_scan_stop = false; + struct cfg80211_sched_scan_request *req = rdev->sched_scan_req; + + if (req && req->owner_nlportid == notify->portid && + notify->portid) + schedule_scan_stop = true; list_for_each_entry_rcu(wdev, &rdev->wdev_list, list) { cfg80211_mlme_unregister_socket(wdev, notify->portid); @@ -12157,6 +12166,12 @@ static int nl80211_netlink_notify(struct notifier_block * nb, spin_unlock(&rdev->destroy_list_lock); schedule_work(&rdev->destroy_work); } + } else if (schedule_scan_stop) { + req->owner_nlportid = 0; + + if (rdev->ops->sched_scan_stop && + rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) + schedule_work(&rdev->sched_scan_stop_wk); } }