diff options
| -rw-r--r-- | include/net/gre.h | 12 | ||||
| -rw-r--r-- | net/ipv4/gre_demux.c | 34 | ||||
| -rw-r--r-- | net/ipv4/ip_gre.c | 36 | ||||
| -rw-r--r-- | net/openvswitch/Kconfig | 2 | ||||
| -rw-r--r-- | net/openvswitch/vport-gre.c | 237 |
5 files changed, 61 insertions, 260 deletions
diff --git a/include/net/gre.h b/include/net/gre.h index b53182018743..e3e08459bf67 100644 --- a/include/net/gre.h +++ b/include/net/gre.h @@ -33,16 +33,8 @@ struct gre_cisco_protocol { int gre_cisco_register(struct gre_cisco_protocol *proto); int gre_cisco_unregister(struct gre_cisco_protocol *proto); -void gre_build_header(struct sk_buff *skb, const struct tnl_ptk_info *tpi, - int hdr_len); - -static inline struct sk_buff *gre_handle_offloads(struct sk_buff *skb, - bool csum) -{ - return iptunnel_handle_offloads(skb, csum, - csum ? SKB_GSO_GRE_CSUM : SKB_GSO_GRE); -} - +struct net_device *gretap_fb_dev_create(struct net *net, const char *name, + u8 name_assign_type); static inline int ip_gre_calc_hlen(__be16 o_flags) { diff --git a/net/ipv4/gre_demux.c b/net/ipv4/gre_demux.c index 4a7b5b2a1ce3..77562e0ac66b 100644 --- a/net/ipv4/gre_demux.c +++ b/net/ipv4/gre_demux.c @@ -61,40 +61,6 @@ int gre_del_protocol(const struct gre_protocol *proto, u8 version) } EXPORT_SYMBOL_GPL(gre_del_protocol); -void gre_build_header(struct sk_buff *skb, const struct tnl_ptk_info *tpi, - int hdr_len) -{ - struct gre_base_hdr *greh; - - skb_push(skb, hdr_len); - - skb_reset_transport_header(skb); - greh = (struct gre_base_hdr *)skb->data; - greh->flags = tnl_flags_to_gre_flags(tpi->flags); - greh->protocol = tpi->proto; - - if (tpi->flags&(TUNNEL_KEY|TUNNEL_CSUM|TUNNEL_SEQ)) { - __be32 *ptr = (__be32 *)(((u8 *)greh) + hdr_len - 4); - - if (tpi->flags&TUNNEL_SEQ) { - *ptr = tpi->seq; - ptr--; - } - if (tpi->flags&TUNNEL_KEY) { - *ptr = tpi->key; - ptr--; - } - if (tpi->flags&TUNNEL_CSUM && - !(skb_shinfo(skb)->gso_type & - (SKB_GSO_GRE|SKB_GSO_GRE_CSUM))) { - *ptr = 0; - *(__sum16 *)ptr = csum_fold(skb_checksum(skb, 0, - skb->len, 0)); - } - } -} -EXPORT_SYMBOL_GPL(gre_build_header); - static int parse_gre_header(struct sk_buff *skb, struct tnl_ptk_info *tpi, bool *csum_err) { diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 554a760c2cd0..49d140200d03 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -318,6 +318,13 @@ static void __gre_xmit(struct sk_buff *skb, struct net_device *dev, ip_tunnel_xmit(skb, dev, tnl_params, tnl_params->protocol); } +static struct sk_buff *gre_handle_offloads(struct sk_buff *skb, + bool csum) +{ + return iptunnel_handle_offloads(skb, csum, + csum ? SKB_GSO_GRE_CSUM : SKB_GSO_GRE); +} + static void gre_fb_xmit(struct sk_buff *skb, struct net_device *dev) { struct ip_tunnel_info *tun_info; @@ -1012,6 +1019,35 @@ static struct rtnl_link_ops ipgre_tap_ops __read_mostly = { .get_link_net = ip_tunnel_get_link_net, }; +struct net_device *gretap_fb_dev_create(struct net *net, const char *name, + u8 name_assign_type) +{ + struct nlattr *tb[IFLA_MAX + 1]; + struct net_device *dev; + struct ip_tunnel *t; + int err; + + memset(&tb, 0, sizeof(tb)); + + dev = rtnl_create_link(net, name, name_assign_type, + &ipgre_tap_ops, tb); + if (IS_ERR(dev)) + return dev; + + /* Configure flow based GRE device. */ + t = netdev_priv(dev); + t->collect_md = true; + + err = ipgre_newlink(net, dev, tb, NULL); + if (err < 0) + goto out; + return dev; +out: + free_netdev(dev); + return ERR_PTR(err); +} +EXPORT_SYMBOL_GPL(gretap_fb_dev_create); + static int __net_init ipgre_tap_init_net(struct net *net) { return ip_tunnel_init_net(net, gre_tap_net_id, &ipgre_tap_ops, "gretap0"); diff --git a/net/openvswitch/Kconfig b/net/openvswitch/Kconfig index 15840401a2ce..422dc0567de9 100644 --- a/net/openvswitch/Kconfig +++ b/net/openvswitch/Kconfig @@ -34,7 +34,7 @@ config OPENVSWITCH config OPENVSWITCH_GRE tristate "Open vSwitch GRE tunneling support" depends on OPENVSWITCH - depends on NET_IPGRE_DEMUX + depends on NET_IPGRE default OPENVSWITCH ---help--- If you say Y here, then the Open vSwitch will be able create GRE diff --git a/net/openvswitch/vport-gre.c b/net/openvswitch/vport-gre.c index b87656c66aaf..871801d2ac23 100644 --- a/net/openvswitch/vport-gre.c +++ b/net/openvswitch/vport-gre.c @@ -45,235 +45,43 @@ #include "datapath.h" #include "vport.h" +#include "vport-netdev.h" static struct vport_ops ovs_gre_vport_ops; -/* Returns the least-significant 32 bits of a __be64. */ -static __be32 be64_get_low32(__be64 x) +static struct vport *gre_tnl_create(const struct vport_parms *parms) { -#ifdef __BIG_ENDIAN - return (__force __be32)x; -#else - return (__force __be32)((__force u64)x >> 32); -#endif -} - -static __be16 filter_tnl_flags(__be16 flags) -{ - return flags & (TUNNEL_CSUM | TUNNEL_KEY); -} - -static struct sk_buff *__build_header(struct sk_buff *skb, - int tunnel_hlen) -{ - struct tnl_ptk_info tpi; - const struct ip_tunnel_key *tun_key; - - tun_key = &OVS_CB(skb)->egress_tun_info->key; - - skb = gre_handle_offloads(skb, !!(tun_key->tun_flags & TUNNEL_CSUM)); - if (IS_ERR(skb)) - return skb; - - tpi.flags = filter_tnl_flags(tun_key->tun_flags); - tpi.proto = htons(ETH_P_TEB); - tpi.key = be64_get_low32(tun_key->tun_id); - tpi.seq = 0; - gre_build_header(skb, &tpi, tunnel_hlen); - - return skb; -} - -static __be64 key_to_tunnel_id(__be32 key, __be32 seq) -{ -#ifdef __BIG_ENDIAN - return (__force __be64)((__force u64)seq << 32 | (__force u32)key); -#else - return (__force __be64)((__force u64)key << 32 | (__force u32)seq); -#endif -} - -/* Called with rcu_read_lock and BH disabled. */ -static int gre_rcv(struct sk_buff *skb, - const struct tnl_ptk_info *tpi) -{ - struct ip_tunnel_info tun_info; - struct ovs_net *ovs_net; - struct vport *vport; - __be64 key; - - ovs_net = net_generic(dev_net(skb->dev), ovs_net_id); - vport = rcu_dereference(ovs_net->vport_net.gre_vport); - if (unlikely(!vport)) - return PACKET_REJECT; - - key = key_to_tunnel_id(tpi->key, tpi->seq); - ip_tunnel_info_init(&tun_info, ip_hdr(skb), 0, 0, key, - filter_tnl_flags(tpi->flags), NULL, 0); - - ovs_vport_receive(vport, skb, &tun_info); - return PACKET_RCVD; -} - -/* Called with rcu_read_lock and BH disabled. */ -static int gre_err(struct sk_buff *skb, u32 info, - const struct tnl_ptk_info *tpi) -{ - struct ovs_net *ovs_net; + struct net *net = ovs_dp_get_net(parms->dp); + struct net_device *dev; struct vport *vport; - ovs_net = net_generic(dev_net(skb->dev), ovs_net_id); - vport = rcu_dereference(ovs_net->vport_net.gre_vport); - - if (unlikely(!vport)) - return PACKET_REJECT; - else - return PACKET_RCVD; -} - -static int gre_tnl_send(struct vport *vport, struct sk_buff *skb) -{ - struct net *net = ovs_dp_get_net(vport->dp); - const struct ip_tunnel_key *tun_key; - struct flowi4 fl; - struct rtable *rt; - int min_headroom; - int tunnel_hlen; - __be16 df; - int err; - - if (unlikely(!OVS_CB(skb)->egress_tun_info)) { - err = -EINVAL; - goto err_free_skb; - } - - tun_key = &OVS_CB(skb)->egress_tun_info->key; - rt = ovs_tunnel_route_lookup(net, tun_key, skb->mark, &fl, IPPROTO_GRE); - if (IS_ERR(rt)) { - err = PTR_ERR(rt); - goto err_free_skb; - } - - tunnel_hlen = ip_gre_calc_hlen(tun_key->tun_flags); - - min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len - + tunnel_hlen + sizeof(struct iphdr) - + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0); - if (skb_headroom(skb) < min_headroom || skb_header_cloned(skb)) { - int head_delta = SKB_DATA_ALIGN(min_headroom - - skb_headroom(skb) + - 16); - err = pskb_expand_head(skb, max_t(int, head_delta, 0), - 0, GFP_ATOMIC); - if (unlikely(err)) - goto err_free_rt; - } - - skb = vlan_hwaccel_push_inside(skb); - if (unlikely(!skb)) { - err = -ENOMEM; - goto err_free_rt; - } - - /* Push Tunnel header. */ - skb = __build_header(skb, tunnel_hlen); - if (IS_ERR(skb)) { - err = PTR_ERR(skb); - skb = NULL; - goto err_free_rt; + vport = ovs_vport_alloc(0, &ovs_gre_vport_ops, parms); + if (IS_ERR(vport)) + return vport; + + rtnl_lock(); + dev = gretap_fb_dev_create(net, parms->name, NET_NAME_USER); + if (IS_ERR(dev)) { + rtnl_unlock(); + ovs_vport_free(vport); + return ERR_CAST(dev); } - df = tun_key->tun_flags & TUNNEL_DONT_FRAGMENT ? - htons(IP_DF) : 0; - - skb->ignore_df = 1; - - return iptunnel_xmit(skb->sk, rt, skb, fl.saddr, - tun_key->ipv4_dst, IPPROTO_GRE, - tun_key->ipv4_tos, tun_key->ipv4_ttl, df, false); -err_free_rt: - ip_rt_put(rt); -err_free_skb: - kfree_skb(skb); - return err; -} - -static struct gre_cisco_protocol gre_protocol = { - .handler = gre_rcv, - .err_handler = gre_err, - .priority = 1, -}; - -static int gre_ports; -static int gre_init(void) -{ - int err; - - gre_ports++; - if (gre_ports > 1) - return 0; - - err = gre_cisco_register(&gre_protocol); - if (err) - pr_warn("cannot register gre protocol handler\n"); - - return err; -} - -static void gre_exit(void) -{ - gre_ports--; - if (gre_ports > 0) - return; - - gre_cisco_unregister(&gre_protocol); -} + dev_change_flags(dev, dev->flags | IFF_UP); + rtnl_unlock(); -static const char *gre_get_name(const struct vport *vport) -{ - return vport_priv(vport); + return vport; } static struct vport *gre_create(const struct vport_parms *parms) { - struct net *net = ovs_dp_get_net(parms->dp); - struct ovs_net *ovs_net; struct vport *vport; - int err; - - err = gre_init(); - if (err) - return ERR_PTR(err); - - ovs_net = net_generic(net, ovs_net_id); - if (ovsl_dereference(ovs_net->vport_net.gre_vport)) { - vport = ERR_PTR(-EEXIST); - goto error; - } - vport = ovs_vport_alloc(IFNAMSIZ, &ovs_gre_vport_ops, parms); + vport = gre_tnl_create(parms); if (IS_ERR(vport)) - goto error; - - strncpy(vport_priv(vport), parms->name, IFNAMSIZ); - rcu_assign_pointer(ovs_net->vport_net.gre_vport, vport); - return vport; - -error: - gre_exit(); - return vport; -} - -static void gre_tnl_destroy(struct vport *vport) -{ - struct net *net = ovs_dp_get_net(vport->dp); - struct ovs_net *ovs_net; - - ovs_net = net_generic(net, ovs_net_id); + return vport; - RCU_INIT_POINTER(ovs_net->vport_net.gre_vport, NULL); - ovs_vport_deferred_free(vport); - gre_exit(); + return ovs_netdev_link(vport, parms->name); } static int gre_get_egress_tun_info(struct vport *vport, struct sk_buff *skb, @@ -288,10 +96,9 @@ static int gre_get_egress_tun_info(struct vport *vport, struct sk_buff *skb, static struct vport_ops ovs_gre_vport_ops = { .type = OVS_VPORT_TYPE_GRE, .create = gre_create, - .destroy = gre_tnl_destroy, - .get_name = gre_get_name, - .send = gre_tnl_send, + .send = ovs_netdev_send, .get_egress_tun_info = gre_get_egress_tun_info, + .destroy = ovs_netdev_tunnel_destroy, .owner = THIS_MODULE, }; |