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[66.187.233.206]) by smtp.gmail.com with ESMTPSA id dm40-20020a05620a1d6800b006fef61300fesm4423061qkb.16.2023.02.04.14.02.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 04 Feb 2023 14:02:54 -0800 (PST) From: Xin Long To: network dev , dev@openvswitch.org Cc: davem@davemloft.net, kuba@kernel.org, Eric Dumazet , Paolo Abeni , Pravin B Shelar , Jamal Hadi Salim , Cong Wang , Jiri Pirko , Pablo Neira Ayuso , Florian Westphal , Marcelo Ricardo Leitner , Ilya Maximets , Aaron Conole Subject: [PATCH net-next 2/5] net: extract nf_ct_skb_network_trim function to nf_conntrack_ovs Date: Sat, 4 Feb 2023 17:02:48 -0500 Message-Id: X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org There are almost the same code in ovs_skb_network_trim() and tcf_ct_skb_network_trim(), this patch extracts them into a function nf_ct_skb_network_trim() and moves the function to nf_conntrack_ovs. Signed-off-by: Xin Long --- include/net/netfilter/nf_conntrack.h | 2 ++ net/netfilter/nf_conntrack_ovs.c | 26 ++++++++++++++++++++ net/openvswitch/conntrack.c | 36 ++++------------------------ net/sched/act_ct.c | 27 +-------------------- 4 files changed, 33 insertions(+), 58 deletions(-) diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h index 6a2019aaa464..a6e89d7212f8 100644 --- a/include/net/netfilter/nf_conntrack.h +++ b/include/net/netfilter/nf_conntrack.h @@ -362,6 +362,8 @@ static inline struct nf_conntrack_net *nf_ct_pernet(const struct net *net) return net_generic(net, nf_conntrack_net_id); } +int nf_ct_skb_network_trim(struct sk_buff *skb, int family); + #define NF_CT_STAT_INC(net, count) __this_cpu_inc((net)->ct.stat->count) #define NF_CT_STAT_INC_ATOMIC(net, count) this_cpu_inc((net)->ct.stat->count) #define NF_CT_STAT_ADD_ATOMIC(net, count, v) this_cpu_add((net)->ct.stat->count, (v)) diff --git a/net/netfilter/nf_conntrack_ovs.c b/net/netfilter/nf_conntrack_ovs.c index eff4d53f8b8c..c60ef71d1aea 100644 --- a/net/netfilter/nf_conntrack_ovs.c +++ b/net/netfilter/nf_conntrack_ovs.c @@ -102,3 +102,29 @@ int nf_ct_add_helper(struct nf_conn *ct, const char *name, u8 family, return ret; } EXPORT_SYMBOL_GPL(nf_ct_add_helper); + +/* Trim the skb to the length specified by the IP/IPv6 header, + * removing any trailing lower-layer padding. This prepares the skb + * for higher-layer processing that assumes skb->len excludes padding + * (such as nf_ip_checksum). The caller needs to pull the skb to the + * network header, and ensure ip_hdr/ipv6_hdr points to valid data. + */ +int nf_ct_skb_network_trim(struct sk_buff *skb, int family) +{ + unsigned int len; + + switch (family) { + case NFPROTO_IPV4: + len = skb_ip_totlen(skb); + break; + case NFPROTO_IPV6: + len = sizeof(struct ipv6hdr) + + ntohs(ipv6_hdr(skb)->payload_len); + break; + default: + len = skb->len; + } + + return pskb_trim_rcsum(skb, len); +} +EXPORT_SYMBOL_GPL(nf_ct_skb_network_trim); diff --git a/net/openvswitch/conntrack.c b/net/openvswitch/conntrack.c index 2172930b1f17..47a58657b1e4 100644 --- a/net/openvswitch/conntrack.c +++ b/net/openvswitch/conntrack.c @@ -1090,36 +1090,6 @@ static int ovs_ct_commit(struct net *net, struct sw_flow_key *key, return 0; } -/* Trim the skb to the length specified by the IP/IPv6 header, - * removing any trailing lower-layer padding. This prepares the skb - * for higher-layer processing that assumes skb->len excludes padding - * (such as nf_ip_checksum). The caller needs to pull the skb to the - * network header, and ensure ip_hdr/ipv6_hdr points to valid data. - */ -static int ovs_skb_network_trim(struct sk_buff *skb) -{ - unsigned int len; - int err; - - switch (skb->protocol) { - case htons(ETH_P_IP): - len = skb_ip_totlen(skb); - break; - case htons(ETH_P_IPV6): - len = sizeof(struct ipv6hdr) - + ntohs(ipv6_hdr(skb)->payload_len); - break; - default: - len = skb->len; - } - - err = pskb_trim_rcsum(skb, len); - if (err) - kfree_skb(skb); - - return err; -} - /* Returns 0 on success, -EINPROGRESS if 'skb' is stolen, or other nonzero * value if 'skb' is freed. */ @@ -1134,9 +1104,11 @@ int ovs_ct_execute(struct net *net, struct sk_buff *skb, nh_ofs = skb_network_offset(skb); skb_pull_rcsum(skb, nh_ofs); - err = ovs_skb_network_trim(skb); - if (err) + err = nf_ct_skb_network_trim(skb, info->family); + if (err) { + kfree_skb(skb); return err; + } if (key->ip.frag != OVS_FRAG_TYPE_NONE) { err = handle_fragments(net, key, info->zone.id, skb); diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c index b126f03c1bb6..0a1ecc972a8b 100644 --- a/net/sched/act_ct.c +++ b/net/sched/act_ct.c @@ -726,31 +726,6 @@ static bool tcf_ct_skb_nfct_cached(struct net *net, struct sk_buff *skb, return false; } -/* Trim the skb to the length specified by the IP/IPv6 header, - * removing any trailing lower-layer padding. This prepares the skb - * for higher-layer processing that assumes skb->len excludes padding - * (such as nf_ip_checksum). The caller needs to pull the skb to the - * network header, and ensure ip_hdr/ipv6_hdr points to valid data. - */ -static int tcf_ct_skb_network_trim(struct sk_buff *skb, int family) -{ - unsigned int len; - - switch (family) { - case NFPROTO_IPV4: - len = skb_ip_totlen(skb); - break; - case NFPROTO_IPV6: - len = sizeof(struct ipv6hdr) - + ntohs(ipv6_hdr(skb)->payload_len); - break; - default: - len = skb->len; - } - - return pskb_trim_rcsum(skb, len); -} - static u8 tcf_ct_skb_nf_family(struct sk_buff *skb) { u8 family = NFPROTO_UNSPEC; @@ -1011,7 +986,7 @@ TC_INDIRECT_SCOPE int tcf_ct_act(struct sk_buff *skb, const struct tc_action *a, if (err) goto drop; - err = tcf_ct_skb_network_trim(skb, family); + err = nf_ct_skb_network_trim(skb, family); if (err) goto drop;