From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753307AbbHRXqk (ORCPT ); Tue, 18 Aug 2015 19:46:40 -0400 Received: from mail-pa0-f43.google.com ([209.85.220.43]:35848 "EHLO mail-pa0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751785AbbHRXmc (ORCPT ); Tue, 18 Aug 2015 19:42:32 -0400 From: Joe Stringer To: netdev@vger.kernel.org, pshelar@nicira.com Cc: linux-kernel@vger.kernel.org, pablo@netfilter.org, fwestpha@redhat.com, hannes@redhat.com, tgraf@suug.ch, jpettit@nicira.com, jesse@nicira.com Subject: [PATCHv4 net-next 01/10] openvswitch: Serialize acts with original netlink len Date: Tue, 18 Aug 2015 16:39:39 -0700 Message-Id: <1439941188-19293-2-git-send-email-joestringer@nicira.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1439941188-19293-1-git-send-email-joestringer@nicira.com> References: <1439941188-19293-1-git-send-email-joestringer@nicira.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Previously, we used the kernel-internal netlink actions length to calculate the size of messages to serialize back to userspace. However,the sw_flow_actions may not be formatted exactly the same as the actions on the wire, so store the original actions length when de-serializing and re-use the original length when serializing. Signed-off-by: Joe Stringer Acked-by: Pravin B Shelar --- v2: No change. v3: Preserve original length across buffer resize. v4: Add ack. --- net/openvswitch/datapath.c | 2 +- net/openvswitch/flow.h | 1 + net/openvswitch/flow_netlink.c | 2 ++ 3 files changed, 4 insertions(+), 1 deletion(-) diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index ffe984f..d5b5473 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -713,7 +713,7 @@ static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, /* OVS_FLOW_ATTR_ACTIONS */ if (should_fill_actions(ufid_flags)) - len += nla_total_size(acts->actions_len); + len += nla_total_size(acts->orig_len); return len + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ diff --git a/net/openvswitch/flow.h b/net/openvswitch/flow.h index b62cdb3..082a87b 100644 --- a/net/openvswitch/flow.h +++ b/net/openvswitch/flow.h @@ -144,6 +144,7 @@ struct sw_flow_id { struct sw_flow_actions { struct rcu_head rcu; + size_t orig_len; /* From flow_cmd_new netlink actions size */ u32 actions_len; struct nlattr actions[]; }; diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c index a6eb77a..96cad8c 100644 --- a/net/openvswitch/flow_netlink.c +++ b/net/openvswitch/flow_netlink.c @@ -1619,6 +1619,7 @@ static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); acts->actions_len = (*sfa)->actions_len; + acts->orig_len = (*sfa)->orig_len; kfree(*sfa); *sfa = acts; @@ -2223,6 +2224,7 @@ int ovs_nla_copy_actions(const struct nlattr *attr, if (IS_ERR(*sfa)) return PTR_ERR(*sfa); + (*sfa)->orig_len = nla_len(attr); err = __ovs_nla_copy_actions(attr, key, 0, sfa, key->eth.type, key->eth.tci, log); if (err) -- 2.1.4