From patchwork Mon Jan 30 16:31:57 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Schultz X-Patchwork-Id: 721619 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3vBwKH1crpz9stc for ; Tue, 31 Jan 2017 03:46:59 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752148AbdA3QoT (ORCPT ); Mon, 30 Jan 2017 11:44:19 -0500 Received: from mail.tpip.net ([92.43.49.48]:40778 "EHLO mail.tpip.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752267AbdA3QmP (ORCPT ); Mon, 30 Jan 2017 11:42:15 -0500 Received: from office.tpip.net (unknown [153.92.65.89]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.tpip.net (Postfix) with ESMTPS id C77C14F407; Mon, 30 Jan 2017 16:32:04 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by office.tpip.net (Postfix) with ESMTP id 9E615A2CDE; Mon, 30 Jan 2017 17:32:04 +0100 (CET) Received: from office.tpip.net ([127.0.0.1]) by localhost (office.tpip.net [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id 7zAX1P8_YP_G; Mon, 30 Jan 2017 17:32:04 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by office.tpip.net (Postfix) with ESMTP id 2FA16A2CE1; Mon, 30 Jan 2017 17:32:04 +0100 (CET) X-Virus-Scanned: amavisd-new at tpip.net Received: from office.tpip.net ([127.0.0.1]) by localhost (office.tpip.net [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id m_r-CBZ1l81v; Mon, 30 Jan 2017 17:32:04 +0100 (CET) Received: from alice.tpip.net (pd95c9392.dip0.t-ipconnect.de [217.92.147.146]) by office.tpip.net (Postfix) with ESMTPSA id DC3C2A2CDF; Mon, 30 Jan 2017 17:32:03 +0100 (CET) From: Andreas Schultz To: Pablo Neira Cc: netdev@vger.kernel.org, Harald Welte , Lionel Gauthier , openbsc@lists.osmocom.org Subject: [PATCH 3/6] gtp: unify genl_find_pdp and prepare for per socket lookup Date: Mon, 30 Jan 2017 17:31:57 +0100 Message-Id: <20170130163200.17070-4-aschultz@tpip.net> X-Mailer: git-send-email 2.10.2 In-Reply-To: <20170130163200.17070-1-aschultz@tpip.net> References: <20170130163200.17070-1-aschultz@tpip.net> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This unifies duplicate code into a helper. It also prepares the groundwork to add a lookup version that uses the socket to find attache pdp contexts. Signed-off-by: Andreas Schultz --- drivers/net/gtp.c | 120 +++++++++++++++++++++++------------------------------- 1 file changed, 51 insertions(+), 69 deletions(-) diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c index c96c71f..6b7a3c2 100644 --- a/drivers/net/gtp.c +++ b/drivers/net/gtp.c @@ -1027,47 +1027,62 @@ static int gtp_genl_new_pdp(struct sk_buff *skb, struct genl_info *info) return err; } +static struct pdp_ctx *gtp_genl_find_pdp_by_link(struct sk_buff *skb, + struct genl_info *info) +{ + struct gtp_dev *gtp; + + gtp = gtp_genl_find_dev(sock_net(skb->sk), info->attrs); + if (!gtp) + return ERR_PTR(-ENODEV); + + if (info->attrs[GTPA_MS_ADDRESS]) { + __be32 ip = nla_get_be32(info->attrs[GTPA_MS_ADDRESS]); + + return ipv4_pdp_find(gtp, ip); + } else if (info->attrs[GTPA_VERSION]) { + u32 gtp_version = nla_get_u32(info->attrs[GTPA_VERSION]); + + if (gtp_version == GTP_V0 && info->attrs[GTPA_TID]) + return gtp0_pdp_find(gtp, nla_get_u64( + info->attrs[GTPA_TID])); + else if (gtp_version == GTP_V1 && info->attrs[GTPA_I_TEI]) + return gtp1_pdp_find(gtp, nla_get_u32( + info->attrs[GTPA_I_TEI])); + } + + return ERR_PTR(-EINVAL); +} + +static struct pdp_ctx *gtp_genl_find_pdp(struct sk_buff *skb, + struct genl_info *info) +{ + struct pdp_ctx *pctx; + + if (info->attrs[GTPA_LINK]) + pctx = gtp_genl_find_pdp_by_link(skb, info); + else + pctx = ERR_PTR(-EINVAL); + + if (!pctx) + pctx = ERR_PTR(-ENOENT); + + return pctx; +} + static int gtp_genl_del_pdp(struct sk_buff *skb, struct genl_info *info) { struct pdp_ctx *pctx; - struct gtp_dev *gtp; int err = 0; - if (!info->attrs[GTPA_VERSION] || - !info->attrs[GTPA_LINK]) + if (!info->attrs[GTPA_VERSION]) return -EINVAL; rcu_read_lock(); - gtp = gtp_genl_find_dev(sock_net(skb->sk), info->attrs); - if (!gtp) { - err = -ENODEV; - goto out_unlock; - } - - switch (nla_get_u32(info->attrs[GTPA_VERSION])) { - case GTP_V0: - if (!info->attrs[GTPA_TID]) { - err = -EINVAL; - goto out_unlock; - } - pctx = gtp0_pdp_find(gtp, nla_get_u64(info->attrs[GTPA_TID])); - break; - case GTP_V1: - if (!info->attrs[GTPA_I_TEI]) { - err = -EINVAL; - goto out_unlock; - } - pctx = gtp1_pdp_find(gtp, nla_get_u64(info->attrs[GTPA_I_TEI])); - break; - - default: - err = -EINVAL; - goto out_unlock; - } - - if (!pctx) { - err = -ENOENT; + pctx = gtp_genl_find_pdp(skb, info); + if (IS_ERR(pctx)) { + err = PTR_ERR(pctx); goto out_unlock; } @@ -1129,49 +1144,16 @@ static int gtp_genl_get_pdp(struct sk_buff *skb, struct genl_info *info) { struct pdp_ctx *pctx = NULL; struct sk_buff *skb2; - struct gtp_dev *gtp; - u32 gtp_version; int err; - if (!info->attrs[GTPA_VERSION] || - !info->attrs[GTPA_LINK]) + if (!info->attrs[GTPA_VERSION]) return -EINVAL; - gtp_version = nla_get_u32(info->attrs[GTPA_VERSION]); - switch (gtp_version) { - case GTP_V0: - case GTP_V1: - break; - default: - return -EINVAL; - } - rcu_read_lock(); - gtp = gtp_genl_find_dev(sock_net(skb->sk), info->attrs); - if (!gtp) { - err = -ENODEV; - goto err_unlock; - } - - if (gtp_version == GTP_V0 && - info->attrs[GTPA_TID]) { - u64 tid = nla_get_u64(info->attrs[GTPA_TID]); - - pctx = gtp0_pdp_find(gtp, tid); - } else if (gtp_version == GTP_V1 && - info->attrs[GTPA_I_TEI]) { - u32 tid = nla_get_u32(info->attrs[GTPA_I_TEI]); - - pctx = gtp1_pdp_find(gtp, tid); - } else if (info->attrs[GTPA_MS_ADDRESS]) { - __be32 ip = nla_get_be32(info->attrs[GTPA_MS_ADDRESS]); - - pctx = ipv4_pdp_find(gtp, ip); - } - - if (pctx == NULL) { - err = -ENOENT; + pctx = gtp_genl_find_pdp(skb, info); + if (IS_ERR(pctx)) { + err = PTR_ERR(pctx); goto err_unlock; }