diff options
Diffstat (limited to 'net/openvswitch')
| -rw-r--r-- | net/openvswitch/Kconfig | 11 | ||||
| -rw-r--r-- | net/openvswitch/Makefile | 2 | ||||
| -rw-r--r-- | net/openvswitch/actions.c | 175 | ||||
| -rw-r--r-- | net/openvswitch/conntrack.c | 454 | ||||
| -rw-r--r-- | net/openvswitch/conntrack.h | 78 | ||||
| -rw-r--r-- | net/openvswitch/datapath.c | 66 | ||||
| -rw-r--r-- | net/openvswitch/datapath.h | 6 | ||||
| -rw-r--r-- | net/openvswitch/flow.c | 2 | ||||
| -rw-r--r-- | net/openvswitch/flow.h | 6 | ||||
| -rw-r--r-- | net/openvswitch/flow_netlink.c | 69 | ||||
| -rw-r--r-- | net/openvswitch/flow_netlink.h | 4 | ||||
| -rw-r--r-- | net/openvswitch/vport.c | 1 |
12 files changed, 837 insertions, 37 deletions
diff --git a/net/openvswitch/Kconfig b/net/openvswitch/Kconfig index 422dc05..98f343d 100644 --- a/net/openvswitch/Kconfig +++ b/net/openvswitch/Kconfig @@ -31,6 +31,17 @@ config OPENVSWITCH If unsure, say N. +config OPENVSWITCH_CONNTRACK + bool "Open vSwitch conntrack action support" + depends on OPENVSWITCH + depends on NF_CONNTRACK + default OPENVSWITCH + ---help--- + If you say Y here, then Open vSwitch module will be able to pass + packets through conntrack. + + Say N to exclude this support and reduce the binary size. + config OPENVSWITCH_GRE tristate "Open vSwitch GRE tunneling support" depends on OPENVSWITCH diff --git a/net/openvswitch/Makefile b/net/openvswitch/Makefile index 6e1701d..5b5913b 100644 --- a/net/openvswitch/Makefile +++ b/net/openvswitch/Makefile @@ -15,6 +15,8 @@ openvswitch-y := \ vport-internal_dev.o \ vport-netdev.o +openvswitch-$(CONFIG_OPENVSWITCH_CONNTRACK) += conntrack.o + obj-$(CONFIG_OPENVSWITCH_VXLAN)+= vport-vxlan.o obj-$(CONFIG_OPENVSWITCH_GENEVE)+= vport-geneve.o obj-$(CONFIG_OPENVSWITCH_GRE) += vport-gre.o diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c index 520438b..72ca2c4 100644 --- a/net/openvswitch/actions.c +++ b/net/openvswitch/actions.c @@ -22,6 +22,7 @@ #include <linux/in.h> #include <linux/ip.h> #include <linux/openvswitch.h> +#include <linux/netfilter_ipv6.h> #include <linux/sctp.h> #include <linux/tcp.h> #include <linux/udp.h> @@ -29,6 +30,7 @@ #include <linux/if_arp.h> #include <linux/if_vlan.h> +#include <net/dst.h> #include <net/ip.h> #include <net/ipv6.h> #include <net/checksum.h> @@ -38,6 +40,7 @@ #include "datapath.h" #include "flow.h" +#include "conntrack.h" #include "vport.h" static int do_execute_actions(struct datapath *dp, struct sk_buff *skb, @@ -52,6 +55,20 @@ struct deferred_action { struct sw_flow_key pkt_key; }; +#define MAX_L2_LEN (VLAN_ETH_HLEN + 3 * MPLS_HLEN) +struct ovs_frag_data { + unsigned long dst; + struct vport *vport; + struct ovs_skb_cb cb; + __be16 inner_protocol; + __u16 vlan_tci; + __be16 vlan_proto; + unsigned int l2_len; + u8 l2_data[MAX_L2_LEN]; +}; + +static DEFINE_PER_CPU(struct ovs_frag_data, ovs_frag_data_storage); + #define DEFERRED_ACTION_FIFO_SIZE 10 struct action_fifo { int head; @@ -602,14 +619,145 @@ static int set_sctp(struct sk_buff *skb, struct sw_flow_key *flow_key, return 0; } -static void do_output(struct datapath *dp, struct sk_buff *skb, int out_port) +static int ovs_vport_output(struct sock *sock, struct sk_buff *skb) +{ + struct ovs_frag_data *data = this_cpu_ptr(&ovs_frag_data_storage); + struct vport *vport = data->vport; + + if (skb_cow_head(skb, data->l2_len) < 0) { + kfree_skb(skb); + return -ENOMEM; + } + + __skb_dst_copy(skb, data->dst); + *OVS_CB(skb) = data->cb; + skb->inner_protocol = data->inner_protocol; + skb->vlan_tci = data->vlan_tci; + skb->vlan_proto = data->vlan_proto; + + /* Reconstruct the MAC header. */ + skb_push(skb, data->l2_len); + memcpy(skb->data, &data->l2_data, data->l2_len); + ovs_skb_postpush_rcsum(skb, skb->data, data->l2_len); + skb_reset_mac_header(skb); + + ovs_vport_send(vport, skb); + return 0; +} + +static unsigned int +ovs_dst_get_mtu(const struct dst_entry *dst) +{ + return dst->dev->mtu; +} + +static struct dst_ops ovs_dst_ops = { + .family = AF_UNSPEC, + .mtu = ovs_dst_get_mtu, +}; + +/* prepare_frag() is called once per (larger-than-MTU) frame; its inverse is + * ovs_vport_output(), which is called once per fragmented packet. + */ +static void prepare_frag(struct vport *vport, struct sk_buff *skb) +{ + unsigned int hlen = skb_network_offset(skb); + struct ovs_frag_data *data; + + data = this_cpu_ptr(&ovs_frag_data_storage); + data->dst = skb->_skb_refdst; + data->vport = vport; + data->cb = *OVS_CB(skb); + data->inner_protocol = skb->inner_protocol; + data->vlan_tci = skb->vlan_tci; + data->vlan_proto = skb->vlan_proto; + data->l2_len = hlen; + memcpy(&data->l2_data, skb->data, hlen); + + memset(IPCB(skb), 0, sizeof(struct inet_skb_parm)); + skb_pull(skb, hlen); +} + +static void ovs_fragment(struct vport *vport, struct sk_buff *skb, u16 mru, + __be16 ethertype) +{ + if (skb_network_offset(skb) > MAX_L2_LEN) { + OVS_NLERR(1, "L2 header too long to fragment"); + return; + } + + if (ethertype == htons(ETH_P_IP)) { + struct dst_entry ovs_dst; + unsigned long orig_dst; + + prepare_frag(vport, skb); + dst_init(&ovs_dst, &ovs_dst_ops, NULL, 1, + DST_OBSOLETE_NONE, DST_NOCOUNT); + ovs_dst.dev = vport->dev; + + orig_dst = skb->_skb_refdst; + skb_dst_set_noref(skb, &ovs_dst); + IPCB(skb)->frag_max_size = mru; + + ip_do_fragment(skb->sk, skb, ovs_vport_output); + refdst_drop(orig_dst); + } else if (ethertype == htons(ETH_P_IPV6)) { + const struct nf_ipv6_ops *v6ops = nf_get_ipv6_ops(); + unsigned long orig_dst; + struct rt6_info ovs_rt; + + if (!v6ops) { + kfree_skb(skb); + return; + } + + prepare_frag(vport, skb); + memset(&ovs_rt, 0, sizeof(ovs_rt)); + dst_init(&ovs_rt.dst, &ovs_dst_ops, NULL, 1, + DST_OBSOLETE_NONE, DST_NOCOUNT); + ovs_rt.dst.dev = vport->dev; + + orig_dst = skb->_skb_refdst; + skb_dst_set_noref(skb, &ovs_rt.dst); + IP6CB(skb)->frag_max_size = mru; + + v6ops->fragment(skb->sk, skb, ovs_vport_output); + refdst_drop(orig_dst); + } else { + WARN_ONCE(1, "Failed fragment ->%s: eth=%04x, MRU=%d, MTU=%d.", + ovs_vport_name(vport), ntohs(ethertype), mru, + vport->dev->mtu); + kfree_skb(skb); + } +} + +static void do_output(struct datapath *dp, struct sk_buff *skb, int out_port, + struct sw_flow_key *key) { struct vport *vport = ovs_vport_rcu(dp, out_port); - if (likely(vport)) - ovs_vport_send(vport, skb); - else + if (likely(vport)) { + u16 mru = OVS_CB(skb)->mru; + + if (likely(!mru || (skb->len <= mru + ETH_HLEN))) { + ovs_vport_send(vport, skb); + } else if (mru <= vport->dev->mtu) { + __be16 ethertype = key->eth.type; + + if (!is_flow_key_valid(key)) { + if (eth_p_mpls(skb->protocol)) + ethertype = skb->inner_protocol; + else + ethertype = vlan_get_protocol(skb); + } + + ovs_fragment(vport, skb, mru, ethertype); + } else { + kfree_skb(skb); + } + } else { kfree_skb(skb); + } } static int output_userspace(struct datapath *dp, struct sk_buff *skb, @@ -623,6 +771,7 @@ static int output_userspace(struct datapath *dp, struct sk_buff *skb, memset(&upcall, 0, sizeof(upcall)); upcall.cmd = OVS_PACKET_CMD_ACTION; + upcall.mru = OVS_CB(skb)->mru; for (a = nla_data(attr), rem = nla_len(attr); rem > 0; a = nla_next(a, &rem)) { @@ -816,6 +965,11 @@ static int execute_masked_set_action(struct sk_buff *skb, err = set_mpls(skb, flow_key, nla_data(a), get_mask(a, __be32 *)); break; + + case OVS_KEY_ATTR_CT_STATE: + case OVS_KEY_ATTR_CT_ZONE: + err = -EINVAL; + break; } return err; @@ -885,7 +1039,7 @@ static int do_execute_actions(struct datapath *dp, struct sk_buff *skb, struct sk_buff *out_skb = skb_clone(skb, GFP_ATOMIC); if (out_skb) - do_output(dp, out_skb, prev_port); + do_output(dp, out_skb, prev_port, key); prev_port = -1; } @@ -942,6 +1096,15 @@ static int do_execute_actions(struct datapath *dp, struct sk_buff *skb, case OVS_ACTION_ATTR_SAMPLE: err = sample(dp, skb, key, a, attr, len); break; + + case OVS_ACTION_ATTR_CT: + err = ovs_ct_execute(ovs_dp_get_net(dp), skb, key, + nla_data(a)); + + /* Hide stolen IP fragments from user space. */ + if (err == -EINPROGRESS) + return 0; + break; } if (unlikely(err)) { @@ -951,7 +1114,7 @@ static int do_execute_actions(struct datapath *dp, struct sk_buff *skb, } if (prev_port != -1) - do_output(dp, skb, prev_port); + do_output(dp, skb, prev_port, key); else consume_skb(skb); diff --git a/net/openvswitch/conntrack.c b/net/openvswitch/conntrack.c new file mode 100644 index 0000000..1189fd5 --- /dev/null +++ b/net/openvswitch/conntrack.c @@ -0,0 +1,454 @@ +/* + * Copyright (c) 2015 Nicira, Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/openvswitch.h> +#include <net/ip.h> +#include <net/netfilter/nf_conntrack_core.h> +#include <net/netfilter/nf_conntrack_zones.h> +#include <net/netfilter/ipv6/nf_defrag_ipv6.h> + +#include "datapath.h" +#include "conntrack.h" +#include "flow.h" +#include "flow_netlink.h" + +struct ovs_ct_len_tbl { + size_t maxlen; + size_t minlen; +}; + +/* Conntrack action context for execution. */ +struct ovs_conntrack_info { + struct nf_conntrack_zone zone; + struct nf_conn *ct; + u32 flags; + u16 family; +}; + +static u16 key_to_nfproto(const struct sw_flow_key *key) +{ + switch (ntohs(key->eth.type)) { + case ETH_P_IP: + return NFPROTO_IPV4; + case ETH_P_IPV6: + return NFPROTO_IPV6; + default: + return NFPROTO_UNSPEC; + } +} + +/* Map SKB connection state into the values used by flow definition. */ +static u8 ovs_ct_get_state(enum ip_conntrack_info ctinfo) +{ + u8 ct_state = OVS_CS_F_TRACKED; + + switch (ctinfo) { + case IP_CT_ESTABLISHED_REPLY: + case IP_CT_RELATED_REPLY: + case IP_CT_NEW_REPLY: + ct_state |= OVS_CS_F_REPLY_DIR; + break; + default: + break; + } + + switch (ctinfo) { + case IP_CT_ESTABLISHED: + case IP_CT_ESTABLISHED_REPLY: + ct_state |= OVS_CS_F_ESTABLISHED; + break; + case IP_CT_RELATED: + case IP_CT_RELATED_REPLY: + ct_state |= OVS_CS_F_RELATED; + break; + case IP_CT_NEW: + case IP_CT_NEW_REPLY: + ct_state |= OVS_CS_F_NEW; + break; + default: + break; + } + + return ct_state; +} + +static void __ovs_ct_update_key(struct sw_flow_key *key, u8 state, + const struct nf_conntrack_zone *zone) +{ + key->ct.state = state; + key->ct.zone = zone->id; +} + +/* Update 'key' based on skb->nfct. If 'post_ct' is true, then OVS has + * previously sent the packet to conntrack via the ct action. + */ +static void ovs_ct_update_key(const struct sk_buff *skb, + struct sw_flow_key *key, bool post_ct) +{ + const struct nf_conntrack_zone *zone = &nf_ct_zone_dflt; + enum ip_conntrack_info ctinfo; + struct nf_conn *ct; + u8 state = 0; + + ct = nf_ct_get(skb, &ctinfo); + if (ct) { + state = ovs_ct_get_state(ctinfo); + if (ct->master) + state |= OVS_CS_F_RELATED; + zone = nf_ct_zone(ct); + } else if (post_ct) { + state = OVS_CS_F_TRACKED | OVS_CS_F_INVALID; + } + __ovs_ct_update_key(key, state, zone); +} + +void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key) +{ + ovs_ct_update_key(skb, key, false); +} + +int ovs_ct_put_key(const struct sw_flow_key *key, struct sk_buff *skb) +{ + if (nla_put_u8(skb, OVS_KEY_ATTR_CT_STATE, key->ct.state)) + return -EMSGSIZE; + + if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && + nla_put_u16(skb, OVS_KEY_ATTR_CT_ZONE, key->ct.zone)) + return -EMSGSIZE; + + return 0; +} + +static int handle_fragments(struct net *net, struct sw_flow_key *key, + u16 zone, struct sk_buff *skb) +{ + struct ovs_skb_cb ovs_cb = *OVS_CB(skb); + + if (key->eth.type == htons(ETH_P_IP)) { + enum ip_defrag_users user = IP_DEFRAG_CONNTRACK_IN + zone; + int err; + + memset(IPCB(skb), 0, sizeof(struct inet_skb_parm)); + err = ip_defrag(skb, user); + if (err) + return err; + + ovs_cb.mru = IPCB(skb)->frag_max_size; + } else if (key->eth.type == htons(ETH_P_IPV6)) { +#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6) + enum ip6_defrag_users user = IP6_DEFRAG_CONNTRACK_IN + zone; + struct sk_buff *reasm; + + memset(IP6CB(skb), 0, sizeof(struct inet6_skb_parm)); + reasm = nf_ct_frag6_gather(skb, user); + if (!reasm) + return -EINPROGRESS; + + if (skb == reasm) + return -EINVAL; + + key->ip.proto = ipv6_hdr(reasm)->nexthdr; + skb_morph(skb, reasm); + consume_skb(reasm); + ovs_cb.mru = IP6CB(skb)->frag_max_size; +#else + return -EPFNOSUPPORT; +#endif + } else { + return -EPFNOSUPPORT; + } + + key->ip.frag = OVS_FRAG_TYPE_NONE; + skb_clear_hash(skb); + skb->ignore_df = 1; + *OVS_CB(skb) = ovs_cb; + + return 0; +} + +static struct nf_conntrack_expect * +ovs_ct_expect_find(struct net *net, const struct nf_conntrack_zone *zone, + u16 proto, const struct sk_buff *skb) +{ + struct nf_conntrack_tuple tuple; + + if (!nf_ct_get_tuplepr(skb, skb_network_offset(skb), proto, &tuple)) + return NULL; + return __nf_ct_expect_find(net, zone, &tuple); +} + +/* Determine whether skb->nfct is equal to the result of conntrack lookup. */ +static bool skb_nfct_cached(const struct net *net, const struct sk_buff *skb, + const struct ovs_conntrack_info *info) +{ + enum ip_conntrack_info ctinfo; + struct nf_conn *ct; + + ct = nf_ct_get(skb, &ctinfo); + if (!ct) + return false; + if (!net_eq(net, read_pnet(&ct->ct_net))) + return false; + if (!nf_ct_zone_equal_any(info->ct, nf_ct_zone(ct))) + return false; + + return true; +} + +static int __ovs_ct_lookup(struct net *net, const struct sw_flow_key *key, + const struct ovs_conntrack_info *info, + struct sk_buff *skb) +{ + /* If we are recirculating packets to match on conntrack fields and + * committing with a separate conntrack action, then we don't need to + * actually run the packet through conntrack twice unless it's for a + * different zone. + */ + if (!skb_nfct_cached(net, skb, info)) { + struct nf_conn *tmpl = info->ct; + + /* Associate skb with specified zone. */ + if (tmpl) { + if (skb->nfct) + nf_conntrack_put(skb->nfct); + nf_conntrack_get(&tmpl->ct_general); + skb->nfct = &tmpl->ct_general; + skb->nfctinfo = IP_CT_NEW; + } + + if (nf_conntrack_in(net, info->family, NF_INET_PRE_ROUTING, + skb) != NF_ACCEPT) + return -ENOENT; + } + + return 0; +} + +/* Lookup connection and read fields into key. */ +static int ovs_ct_lookup(struct net *net, struct sw_flow_key *key, + const struct ovs_conntrack_info *info, + struct sk_buff *skb) +{ + struct nf_conntrack_expect *exp; + + exp = ovs_ct_expect_find(net, &info->zone, info->family, skb); + if (exp) { + u8 state; + + state = OVS_CS_F_TRACKED | OVS_CS_F_NEW | OVS_CS_F_RELATED; + __ovs_ct_update_key(key, state, &info->zone); + } else { + int err; + + err = __ovs_ct_lookup(net, key, info, skb); + if (err) + return err; + + ovs_ct_update_key(skb, key, true); + } + + return 0; +} + +/* Lookup connection and confirm if unconfirmed. */ +static int ovs_ct_commit(struct net *net, struct sw_flow_key *key, + const struct ovs_conntrack_info *info, + struct sk_buff *skb) +{ + u8 state; + int err; + + state = key->ct.state; + if (key->ct.zone == info->zone.id && + ((state & OVS_CS_F_TRACKED) && !(state & OVS_CS_F_NEW))) { + /* Previous lookup has shown that this connection is already + * tracked and committed. Skip committing. + */ + return 0; + } + + err = __ovs_ct_lookup(net, key, info, skb); + if (err) + return err; + if (nf_conntrack_confirm(skb) != NF_ACCEPT) + return -EINVAL; + + ovs_ct_update_key(skb, key, true); + + return 0; +} + +int ovs_ct_execute(struct net *net, struct sk_buff *skb, + struct sw_flow_key *key, + const struct ovs_conntrack_info *info) +{ + int nh_ofs; + int err; + + /* The conntrack module expects to be working at L3. */ + nh_ofs = skb_network_offset(skb); + skb_pull(skb, nh_ofs); + + if (key->ip.frag != OVS_FRAG_TYPE_NONE) { + err = handle_fragments(net, key, info->zone.id, skb); + if (err) + return err; + } + + if (info->flags & OVS_CT_F_COMMIT) + err = ovs_ct_commit(net, key, info, skb); + else + err = ovs_ct_lookup(net, key, info, skb); + + skb_push(skb, nh_ofs); + return err; +} + +static const struct ovs_ct_len_tbl ovs_ct_attr_lens[OVS_CT_ATTR_MAX + 1] = { + [OVS_CT_ATTR_FLAGS] = { .minlen = sizeof(u32), + .maxlen = sizeof(u32) }, + [OVS_CT_ATTR_ZONE] = { .minlen = sizeof(u16), + .maxlen = sizeof(u16) }, +}; + +static int parse_ct(const struct nlattr *attr, struct ovs_conntrack_info *info, + bool log) +{ + struct nlattr *a; + int rem; + + nla_for_each_nested(a, attr, rem) { + int type = nla_type(a); + int maxlen = ovs_ct_attr_lens[type].maxlen; + int minlen = ovs_ct_attr_lens[type].minlen; + + if (type > OVS_CT_ATTR_MAX) { + OVS_NLERR(log, + "Unknown conntrack attr (type=%d, max=%d)", + type, OVS_CT_ATTR_MAX); + return -EINVAL; + } + if (nla_len(a) < minlen || nla_len(a) > maxlen) { + OVS_NLERR(log, + "Conntrack attr type has unexpected length (type=%d, length=%d, expected=%d)", + type, nla_len(a), maxlen); + return -EINVAL; + } + + switch (type) { + case OVS_CT_ATTR_FLAGS: + info->flags = nla_get_u32(a); + break; +#ifdef CONFIG_NF_CONNTRACK_ZONES + case OVS_CT_ATTR_ZONE: + info->zone.id = nla_get_u16(a); + break; +#endif + default: + OVS_NLERR(log, "Unknown conntrack attr (%d)", + type); + return -EINVAL; + } + } + + if (rem > 0) { + OVS_NLERR(log, "Conntrack attr has %d unknown bytes", rem); + return -EINVAL; + } + + return 0; +} + +bool ovs_ct_verify(enum ovs_key_attr attr) +{ + if (attr == OVS_KEY_ATTR_CT_STATE) + return true; + if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && + attr == OVS_KEY_ATTR_CT_ZONE) + return true; + + return false; +} + +int ovs_ct_copy_action(struct net *net, const struct nlattr *attr, + const struct sw_flow_key *key, + struct sw_flow_actions **sfa, bool log) +{ + struct ovs_conntrack_info ct_info; + u16 family; + int err; + + family = key_to_nfproto(key); + if (family == NFPROTO_UNSPEC) { + OVS_NLERR(log, "ct family unspecified"); + return -EINVAL; + } + + memset(&ct_info, 0, sizeof(ct_info)); + ct_info.family = family; + + nf_ct_zone_init(&ct_info.zone, NF_CT_DEFAULT_ZONE_ID, + NF_CT_DEFAULT_ZONE_DIR, 0); + + err = parse_ct(attr, &ct_info, log); + if (err) + return err; + + /* Set up template for tracking connections in specific zones. */ + ct_info.ct = nf_ct_tmpl_alloc(net, &ct_info.zone, GFP_KERNEL); + if (!ct_info.ct) { + OVS_NLERR(log, "Failed to allocate conntrack template"); + return -ENOMEM; + } + + err = ovs_nla_add_action(sfa, OVS_ACTION_ATTR_CT, &ct_info, + sizeof(ct_info), log); + if (err) + goto err_free_ct; + + __set_bit(IPS_CONFIRMED_BIT, &ct_info.ct->status); + nf_conntrack_get(&ct_info.ct->ct_general); + return 0; +err_free_ct: + nf_conntrack_free(ct_info.ct); + return err; +} + +int ovs_ct_action_to_attr(const struct ovs_conntrack_info *ct_info, + struct sk_buff *skb) +{ + struct nlattr *start; + + start = nla_nest_start(skb, OVS_ACTION_ATTR_CT); + if (!start) + return -EMSGSIZE; + + if (nla_put_u32(skb, OVS_CT_ATTR_FLAGS, ct_info->flags)) + return -EMSGSIZE; + if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && + nla_put_u16(skb, OVS_CT_ATTR_ZONE, ct_info->zone.id)) + return -EMSGSIZE; + + nla_nest_end(skb, start); + + return 0; +} + +void ovs_ct_free_action(const struct nlattr *a) +{ + struct ovs_conntrack_info *ct_info = nla_data(a); + + if (ct_info->ct) + nf_ct_put(ct_info->ct); +} diff --git a/net/openvswitch/conntrack.h b/net/openvswitch/conntrack.h new file mode 100644 index 0000000..e812ee6 --- /dev/null +++ b/net/openvswitch/conntrack.h @@ -0,0 +1,78 @@ +/* + * Copyright (c) 2015 Nicira, Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#ifndef OVS_CONNTRACK_H +#define OVS_CONNTRACK_H 1 + +#include "flow.h" + +struct ovs_conntrack_info; +enum ovs_key_attr; + +#if defined(CONFIG_OPENVSWITCH_CONNTRACK) +bool ovs_ct_verify(enum ovs_key_attr attr); +int ovs_ct_copy_action(struct net *, const struct nlattr *, + const struct sw_flow_key *, struct sw_flow_actions **, + bool log); +int ovs_ct_action_to_attr(const struct ovs_conntrack_info *, struct sk_buff *); + +int ovs_ct_execute(struct net *, struct sk_buff *, struct sw_flow_key *, + const struct ovs_conntrack_info *); + +void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key); +int ovs_ct_put_key(const struct sw_flow_key *key, struct sk_buff *skb); +void ovs_ct_free_action(const struct nlattr *a); +#else +#include <linux/errno.h> + +static inline bool ovs_ct_verify(int attr) +{ + return false; +} + +static inline int ovs_ct_copy_action(struct net *net, const struct nlattr *nla, + const struct sw_flow_key *key, + struct sw_flow_actions **acts, bool log) +{ + return -ENOTSUPP; +} + +static inline int ovs_ct_action_to_attr(const struct ovs_conntrack_info *info, + struct sk_buff *skb) +{ + return -ENOTSUPP; +} + +static inline int ovs_ct_execute(struct net *net, struct sk_buff *skb, + struct sw_flow_key *key, + const struct ovs_conntrack_info *info) +{ + return -ENOTSUPP; +} + +static inline void ovs_ct_fill_key(const struct sk_buff *skb, + struct sw_flow_key *key) +{ + key->ct.state = 0; + key->ct.zone = 0; +} + +static inline int ovs_ct_put_key(const struct sw_flow_key *key, + struct sk_buff *skb) +{ + return 0; +} + +static inline void ovs_ct_free_action(const struct nlattr *a) { } +#endif +#endif /* ovs_conntrack.h */ diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index d5b5473..72e6372 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -275,6 +275,7 @@ void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) memset(&upcall, 0, sizeof(upcall)); upcall.cmd = OVS_PACKET_CMD_MISS; upcall.portid = ovs_vport_find_upcall_portid(p, skb); + upcall.mru = OVS_CB(skb)->mru; error = ovs_dp_upcall(dp, skb, key, &upcall); if (unlikely(error)) kfree_skb(skb); @@ -400,9 +401,23 @@ static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, if (upcall_info->actions_len) size += nla_total_size(upcall_info->actions_len); + /* OVS_PACKET_ATTR_MRU */ + if (upcall_info->mru) + size += nla_total_size(sizeof(upcall_info->mru)); + return size; } +static void pad_packet(struct datapath *dp, struct sk_buff *skb) +{ + if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { + size_t plen = NLA_ALIGN(skb->len) - skb->len; + + if (plen > 0) + memset(skb_put(skb, plen), 0, plen); + } +} + static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, const struct sw_flow_key *key, const struct dp_upcall_info *upcall_info) @@ -492,6 +507,16 @@ static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, nla_nest_cancel(user_skb, nla); } + /* Add OVS_PACKET_ATTR_MRU */ + if (upcall_info->mru) { + if (nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, + upcall_info->mru)) { + err = -ENOBUFS; + goto out; + } + pad_packet(dp, user_skb); + } + /* Only reserve room for attribute header, packet data is added * in skb_zerocopy() */ if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { @@ -505,12 +530,7 @@ static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, goto out; /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ - if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { - size_t plen = NLA_ALIGN(user_skb->len) - user_skb->len; - - if (plen > 0) - memset(skb_put(user_skb, plen), 0, plen); - } + pad_packet(dp, user_skb); ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; @@ -527,6 +547,7 @@ out: static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) { struct ovs_header *ovs_header = info->userhdr; + struct net *net = sock_net(skb->sk); struct nlattr **a = info->attrs; struct sw_flow_actions *acts; struct sk_buff *packet; @@ -535,6 +556,7 @@ static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) struct datapath *dp; struct ethhdr *eth; struct vport *input_vport; + u16 mru = 0; int len; int err; bool log = !a[OVS_PACKET_ATTR_PROBE]; @@ -564,6 +586,13 @@ static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) else packet->protocol = htons(ETH_P_802_2); + /* Set packet's mru */ + if (a[OVS_PACKET_ATTR_MRU]) { + mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); + packet->ignore_df = 1; + } + OVS_CB(packet)->mru = mru; + /* Build an sw_flow for sending this packet. */ flow = ovs_flow_alloc(); err = PTR_ERR(flow); @@ -575,7 +604,7 @@ static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) if (err) goto err_flow_free; - err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], + err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], &flow->key, &acts, log); if (err) goto err_flow_free; @@ -586,7 +615,7 @@ static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) packet->mark = flow->key.phy.skb_mark; rcu_read_lock(); - dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); + dp = get_dp_rcu(net, ovs_header->dp_ifindex); err = -ENODEV; if (!dp) goto err_unlock; @@ -598,6 +627,7 @@ static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) if (!input_vport) goto err_unlock; + packet->dev = input_vport->dev; OVS_CB(packet)->input_vport = input_vport; sf_acts = rcu_dereference(flow->sf_acts); @@ -624,6 +654,7 @@ static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, + [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, }; static const struct genl_ops dp_packet_genl_ops[] = { @@ -880,6 +911,7 @@ static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) { + struct net *net = sock_net(skb->sk); struct nlattr **a = info->attrs; struct ovs_header *ovs_header = info->userhdr; struct sw_flow *flow = NULL, *new_flow; @@ -929,8 +961,8 @@ static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) goto err_kfree_flow; /* Validate actions. */ - error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &new_flow->key, - &acts, log); + error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], + &new_flow->key, &acts, log); if (error) { OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); goto err_kfree_flow; @@ -944,7 +976,7 @@ static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) } ovs_lock(); - dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); + dp = get_dp(net, ovs_header->dp_ifindex); if (unlikely(!dp)) { error = -ENODEV; goto err_unlock_ovs; @@ -1038,7 +1070,8 @@ error: } /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ -static struct sw_flow_actions *get_flow_actions(const struct nlattr *a, +static struct sw_flow_actions *get_flow_actions(struct net *net, + const struct nlattr *a, const struct sw_flow_key *key, const struct sw_flow_mask *mask, bool log) @@ -1048,7 +1081,7 @@ static struct sw_flow_actions *get_flow_actions(const struct nlattr *a, int error; ovs_flow_mask_key(&masked_key, key, mask); - error = ovs_nla_copy_actions(a, &masked_key, &acts, log); + error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); if (error) { OVS_NLERR(log, "Actions may not be safe on all matching packets"); @@ -1060,6 +1093,7 @@ static struct sw_flow_actions *get_flow_actions(const struct nlattr *a, static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) { + struct net *net = sock_net(skb->sk); struct nlattr **a = info->attrs; struct ovs_header *ovs_header = info->userhdr; struct sw_flow_key key; @@ -1091,8 +1125,8 @@ static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) /* Validate actions. */ if (a[OVS_FLOW_ATTR_ACTIONS]) { - acts = get_flow_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, &mask, - log); + acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], &key, + &mask, log); if (IS_ERR(acts)) { error = PTR_ERR(acts); goto error; @@ -1108,7 +1142,7 @@ static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) } ovs_lock(); - dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); + dp = get_dp(net, ovs_header->dp_ifindex); if (unlikely(!dp)) { error = -ENODEV; goto err_unlock_ovs; diff --git a/net/openvswitch/datapath.h b/net/openvswitch/datapath.h index 487a85f..d24ba98 100644 --- a/net/openvswitch/datapath.h +++ b/net/openvswitch/datapath.h @@ -27,6 +27,7 @@ #include <linux/u64_stats_sync.h> #include <net/ip_tunnels.h> +#include "conntrack.h" #include "flow.h" #include "flow_table.h" #include "vport.h" @@ -97,10 +98,13 @@ struct datapath { * NULL if the packet is not being tunneled. * @input_vport: The original vport packet came in on. This value is cached * when a packet is received by OVS. + * @mru: The maximum received fragement size; 0 if the packet is not + * fragmented. */ struct ovs_skb_cb { struct ip_tunnel_info *egress_tun_info; struct vport *input_vport; + u16 mru; }; #define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb) @@ -113,6 +117,7 @@ struct ovs_skb_cb { * then no packet is sent and the packet is accounted in the datapath's @n_lost * counter. * @egress_tun_info: If nonnull, becomes %OVS_PACKET_ATTR_EGRESS_TUN_KEY. + * @mru: If not zero, Maximum received IP fragment size. */ struct dp_upcall_info { const struct ip_tunnel_info *egress_tun_info; @@ -121,6 +126,7 @@ struct dp_upcall_info { int actions_len; u32 portid; u8 cmd; + u16 mru; }; /** diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c index 8db22ef..376ca87 100644 --- a/net/openvswitch/flow.c +++ b/net/openvswitch/flow.c @@ -49,6 +49,7 @@ #include "datapath.h" #include "flow.h" #include "flow_netlink.h" +#include "conntrack.h" u64 ovs_flow_used_time(unsigned long flow_jiffies) { @@ -707,6 +708,7 @@ int ovs_flow_key_extract(const struct ip_tunnel_info *tun_info, key->phy.priority = skb->priority; key->phy.in_port = OVS_CB(skb)->input_vport->port_no; key->phy.skb_mark = skb->mark; + ovs_ct_fill_key(skb, key); key->ovs_flow_hash = 0; key->recirc_id = 0; diff --git a/net/openvswitch/flow.h b/net/openvswitch/flow.h index 082a87b..312c7d7 100644 --- a/net/openvswitch/flow.h +++ b/net/openvswitch/flow.h @@ -111,6 +111,12 @@ struct sw_flow_key { } nd; } ipv6; }; + struct { + /* Connection tracking fields. */ + u16 zone; + u8 state; + } ct; + } __aligned(BITS_PER_LONG/8); /* Ensure that we can do comparisons as longs. */ struct sw_flow_key_range { diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c index c182b28..4e795b2 100644 --- a/net/openvswitch/flow_netlink.c +++ b/net/openvswitch/flow_netlink.c @@ -281,7 +281,7 @@ size_t ovs_key_attr_size(void) /* Whenever adding new OVS_KEY_ FIELDS, we should consider * updating this function. */ - BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 22); + BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 24); return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ @@ -290,6 +290,8 @@ size_t ovs_key_attr_size(void) + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */ + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */ + + nla_total_size(1) /* OVS_KEY_ATTR_CT_STATE */ + + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */ + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */ @@ -339,6 +341,8 @@ static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED, .next = ovs_tunnel_key_lens, }, [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) }, + [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u8) }, + [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) }, }; static bool is_all_zero(const u8 *fp, size_t size) @@ -768,6 +772,21 @@ static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs, return -EINVAL; *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL); } + + if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) && + ovs_ct_verify(OVS_KEY_ATTR_CT_STATE)) { + u8 ct_state = nla_get_u8(a[OVS_KEY_ATTR_CT_STATE]); + + SW_FLOW_KEY_PUT(match, ct.state, ct_state, is_mask); + *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE); + } + if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) && + ovs_ct_verify(OVS_KEY_ATTR_CT_ZONE)) { + u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]); + + SW_FLOW_KEY_PUT(match, ct.zone, ct_zone, is_mask); + *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE); + } return 0; } @@ -1266,6 +1285,7 @@ int ovs_nla_get_flow_metadata(const struct nlattr *attr, memset(&match, 0, sizeof(match)); match.key = key; + memset(&key->ct, 0, sizeof(key->ct)); key->phy.in_port = DP_MAX_PORTS; return metadata_from_nlattrs(&match, &attrs, a, false, log); @@ -1314,6 +1334,9 @@ static int __ovs_nla_put_key(const struct sw_flow_key *swkey, if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark)) goto nla_put_failure; + if (ovs_ct_put_key(output, skb)) + goto nla_put_failure; + nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); if (!nla) goto nla_put_failure; @@ -1574,6 +1597,9 @@ void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts) case OVS_ACTION_ATTR_SET: ovs_nla_free_set_action(a); break; + case OVS_ACTION_ATTR_CT: + ovs_ct_free_action(a); + break; } } @@ -1647,8 +1673,8 @@ static struct nlattr *__add_action(struct sw_flow_actions **sfa, return a; } -static int add_action(struct sw_flow_actions **sfa, int attrtype, - void *data, int len, bool log) +int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data, + int len, bool log) { struct nlattr *a; @@ -1663,7 +1689,7 @@ static inline int add_nested_action_start(struct sw_flow_actions **sfa, int used = (*sfa)->actions_len; int err; - err = add_action(sfa, attrtype, NULL, 0, log); + err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log); if (err) return err; @@ -1679,12 +1705,12 @@ static inline void add_nested_action_end(struct sw_flow_actions *sfa, a->nla_len = sfa->actions_len - st_offset; } -static int __ovs_nla_copy_actions(const struct nlattr *attr, +static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, const struct sw_flow_key *key, int depth, struct sw_flow_actions **sfa, __be16 eth_type, __be16 vlan_tci, bool log); -static int validate_and_copy_sample(const struct nlattr *attr, +static int validate_and_copy_sample(struct net *net, const struct nlattr *attr, const struct sw_flow_key *key, int depth, struct sw_flow_actions **sfa, __be16 eth_type, __be16 vlan_tci, bool log) @@ -1716,15 +1742,15 @@ static int validate_and_copy_sample(const struct nlattr *attr, start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log); if (start < 0) return start; - err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, - nla_data(probability), sizeof(u32), log); + err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, + nla_data(probability), sizeof(u32), log); if (err) return err; st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log); if (st_acts < 0) return st_acts; - err = __ovs_nla_copy_actions(actions, key, depth + 1, sfa, + err = __ovs_nla_copy_actions(net, actions, key, depth + 1, sfa, eth_type, vlan_tci, log); if (err) return err; @@ -2058,7 +2084,7 @@ static int copy_action(const struct nlattr *from, return 0; } -static int __ovs_nla_copy_actions(const struct nlattr *attr, +static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, const struct sw_flow_key *key, int depth, struct sw_flow_actions **sfa, __be16 eth_type, __be16 vlan_tci, bool log) @@ -2082,7 +2108,8 @@ static int __ovs_nla_copy_actions(const struct nlattr *attr, [OVS_ACTION_ATTR_SET] = (u32)-1, [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1, [OVS_ACTION_ATTR_SAMPLE] = (u32)-1, - [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash) + [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash), + [OVS_ACTION_ATTR_CT] = (u32)-1, }; const struct ovs_action_push_vlan *vlan; int type = nla_type(a); @@ -2189,13 +2216,20 @@ static int __ovs_nla_copy_actions(const struct nlattr *attr, break; case OVS_ACTION_ATTR_SAMPLE: - err = validate_and_copy_sample(a, key, depth, sfa, + err = validate_and_copy_sample(net, a, key, depth, sfa, eth_type, vlan_tci, log); if (err) return err; skip_copy = true; break; + case OVS_ACTION_ATTR_CT: + err = ovs_ct_copy_action(net, a, key, sfa, log); + if (err) + return err; + skip_copy = true; + break; + default: OVS_NLERR(log, "Unknown Action type %d", type); return -EINVAL; @@ -2214,7 +2248,7 @@ static int __ovs_nla_copy_actions(const struct nlattr *attr, } /* 'key' must be the masked key. */ -int ovs_nla_copy_actions(const struct nlattr *attr, +int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, const struct sw_flow_key *key, struct sw_flow_actions **sfa, bool log) { @@ -2225,7 +2259,7 @@ int ovs_nla_copy_actions(const struct nlattr *attr, return PTR_ERR(*sfa); (*sfa)->orig_len = nla_len(attr); - err = __ovs_nla_copy_actions(attr, key, 0, sfa, key->eth.type, + err = __ovs_nla_copy_actions(net, attr, key, 0, sfa, key->eth.type, key->eth.tci, log); if (err) ovs_nla_free_flow_actions(*sfa); @@ -2350,6 +2384,13 @@ int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb) if (err) return err; break; + + case OVS_ACTION_ATTR_CT: + err = ovs_ct_action_to_attr(nla_data(a), skb); + if (err) + return err; + break; + default: if (nla_put(skb, type, nla_len(a), nla_data(a))) return -EMSGSIZE; diff --git a/net/openvswitch/flow_netlink.h b/net/openvswitch/flow_netlink.h index acd0744..c0b484b 100644 --- a/net/openvswitch/flow_netlink.h +++ b/net/openvswitch/flow_netlink.h @@ -62,9 +62,11 @@ int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid, const struct sw_flow_key *key, bool log); u32 ovs_nla_get_ufid_flags(const struct nlattr *attr); -int ovs_nla_copy_actions(const struct nlattr *attr, +int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, const struct sw_flow_key *key, struct sw_flow_actions **sfa, bool log); +int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, + void *data, int len, bool log); int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb); diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c index d73e5a1..e2dc9da 100644 --- a/net/openvswitch/vport.c +++ b/net/openvswitch/vport.c @@ -484,6 +484,7 @@ void ovs_vport_receive(struct vport *vport, struct sk_buff *skb, OVS_CB(skb)->input_vport = vport; OVS_CB(skb)->egress_tun_info = NULL; + OVS_CB(skb)->mru = 0; /* Extract flow from 'skb' into 'key'. */ error = ovs_flow_key_extract(tun_info, skb, &key); if (unlikely(error)) { |