From patchwork Fri Nov 6 22:17:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 321947 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=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 25C17C388F9 for ; Fri, 6 Nov 2020 22:22:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CDFFD206C1 for ; Fri, 6 Nov 2020 22:22:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604701342; bh=bFutEyBiizUw1vyhN3FC1qY9OXA4PL6N3mzvnxKxBMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=OA89oSbwqJuyoNA3oqlj2GzjMuK6MIKnFOIREPblbopTV3pAd/90RQAK336mx0+53 4WGNiUg5SPXfZXiHWI9xYoWH8LcWHz8Hj+2KIxEq/Kmj5s36tBvbsf9ZUbVKg5DXR3 MokBPDAChQmkdDKJ6GYzmeNQNz1NvFtt2kV2pWz0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728871AbgKFWSE (ORCPT ); Fri, 6 Nov 2020 17:18:04 -0500 Received: from mail.kernel.org ([198.145.29.99]:41240 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728848AbgKFWSD (ORCPT ); Fri, 6 Nov 2020 17:18:03 -0500 Received: from localhost.localdomain (HSI-KBW-46-223-126-90.hsi.kabel-badenwuerttemberg.de [46.223.126.90]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8E6F722202; Fri, 6 Nov 2020 22:18:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604701083; bh=bFutEyBiizUw1vyhN3FC1qY9OXA4PL6N3mzvnxKxBMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RgH5g9UZXENjafYgeXhJ8iB+YNS3QNz4ojsxogvQnqu8e7BppmYHtlr3ungzkG6SB c4iA46D/E2vxsXG+Jt3DnN5FiDcRMcI29BNNrDhg1L1uQBmwcIgRklEayIoVlpbmE9 X7noh7Fkg+B40xXdFUXI0fyvzcjl88OoaGItrITM= From: Arnd Bergmann To: netdev@vger.kernel.org Cc: Arnd Bergmann , linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, bridge@lists.linux-foundation.org, linux-hams@vger.kernel.org, Jakub Kicinski , Christoph Hellwig , Alexander Viro , Johannes Berg , Andrew Lunn , Heiner Kallweit Subject: [RFC net-next 03/28] staging: wlan-ng: use siocdevprivate Date: Fri, 6 Nov 2020 23:17:18 +0100 Message-Id: <20201106221743.3271965-4-arnd@kernel.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201106221743.3271965-1-arnd@kernel.org> References: <20201106221743.3271965-1-arnd@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Arnd Bergmann wlan-ng has two private ioctls that correctly work in compat mode. Move these over to the new ndo_siocdevprivate mechanism. The p80211netdev_ethtool() function is commented out and has no use here, so this can be removed Signed-off-by: Arnd Bergmann --- drivers/staging/wlan-ng/p80211netdev.c | 75 ++++---------------------- 1 file changed, 11 insertions(+), 64 deletions(-) diff --git a/drivers/staging/wlan-ng/p80211netdev.c b/drivers/staging/wlan-ng/p80211netdev.c index a15abb2c8f54..6e85be994f1a 100644 --- a/drivers/staging/wlan-ng/p80211netdev.c +++ b/drivers/staging/wlan-ng/p80211netdev.c @@ -98,8 +98,8 @@ static int p80211knetdev_stop(struct net_device *netdev); static netdev_tx_t p80211knetdev_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev); static void p80211knetdev_set_multicast_list(struct net_device *dev); -static int p80211knetdev_do_ioctl(struct net_device *dev, struct ifreq *ifr, - int cmd); +static int p80211knetdev_siocdevprivate(struct net_device *dev, struct ifreq *ifr, + void __user *data, int cmd); static int p80211knetdev_set_mac_address(struct net_device *dev, void *addr); static void p80211knetdev_tx_timeout(struct net_device *netdev, unsigned int txqueue); static int p80211_rx_typedrop(struct wlandevice *wlandev, u16 fc); @@ -461,56 +461,8 @@ static void p80211knetdev_set_multicast_list(struct net_device *dev) wlandev->set_multicast_list(wlandev, dev); } -#ifdef SIOCETHTOOL - -static int p80211netdev_ethtool(struct wlandevice *wlandev, - void __user *useraddr) -{ - u32 ethcmd; - struct ethtool_drvinfo info; - struct ethtool_value edata; - - memset(&info, 0, sizeof(info)); - memset(&edata, 0, sizeof(edata)); - - if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd))) - return -EFAULT; - - switch (ethcmd) { - case ETHTOOL_GDRVINFO: - info.cmd = ethcmd; - snprintf(info.driver, sizeof(info.driver), "p80211_%s", - wlandev->nsdname); - snprintf(info.version, sizeof(info.version), "%s", - WLAN_RELEASE); - - if (copy_to_user(useraddr, &info, sizeof(info))) - return -EFAULT; - return 0; -#ifdef ETHTOOL_GLINK - case ETHTOOL_GLINK: - edata.cmd = ethcmd; - - if (wlandev->linkstatus && - (wlandev->macmode != WLAN_MACMODE_NONE)) { - edata.data = 1; - } else { - edata.data = 0; - } - - if (copy_to_user(useraddr, &edata, sizeof(edata))) - return -EFAULT; - return 0; -#endif - } - - return -EOPNOTSUPP; -} - -#endif - /*---------------------------------------------------------------- - * p80211knetdev_do_ioctl + * p80211knetdev_siocdevprivate * * Handle an ioctl call on one of our devices. Everything Linux * ioctl specific is done here. Then we pass the contents of the @@ -537,8 +489,9 @@ static int p80211netdev_ethtool(struct wlandevice *wlandev, * locks. *---------------------------------------------------------------- */ -static int p80211knetdev_do_ioctl(struct net_device *dev, - struct ifreq *ifr, int cmd) +static int p80211knetdev_siocdevprivate(struct net_device *dev, + struct ifreq *ifr, + void __user *data, int cmd) { int result = 0; struct p80211ioctl_req *req = (struct p80211ioctl_req *)ifr; @@ -547,13 +500,8 @@ static int p80211knetdev_do_ioctl(struct net_device *dev, netdev_dbg(dev, "rx'd ioctl, cmd=%d, len=%d\n", cmd, req->len); -#ifdef SIOCETHTOOL - if (cmd == SIOCETHTOOL) { - result = - p80211netdev_ethtool(wlandev, (void __user *)ifr->ifr_data); - goto bail; - } -#endif + if (in_compat_syscall()) + return -EOPNOTSUPP; /* Test the magic, assume ifr is good if it's there */ if (req->magic != P80211_IOCTL_MAGIC) { @@ -572,14 +520,13 @@ static int p80211knetdev_do_ioctl(struct net_device *dev, /* Allocate a buf of size req->len */ msgbuf = kmalloc(req->len, GFP_KERNEL); if (msgbuf) { - if (copy_from_user(msgbuf, (void __user *)req->data, req->len)) + if (copy_from_user(msgbuf, data, req->len)) result = -EFAULT; else result = p80211req_dorequest(wlandev, msgbuf); if (result == 0) { - if (copy_to_user - ((void __user *)req->data, msgbuf, req->len)) { + if (copy_to_user(data, msgbuf, req->len)) { result = -EFAULT; } } @@ -684,7 +631,7 @@ static const struct net_device_ops p80211_netdev_ops = { .ndo_stop = p80211knetdev_stop, .ndo_start_xmit = p80211knetdev_hard_start_xmit, .ndo_set_rx_mode = p80211knetdev_set_multicast_list, - .ndo_do_ioctl = p80211knetdev_do_ioctl, + .ndo_siocdevprivate = p80211knetdev_siocdevprivate, .ndo_set_mac_address = p80211knetdev_set_mac_address, .ndo_tx_timeout = p80211knetdev_tx_timeout, .ndo_validate_addr = eth_validate_addr,