#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-#include <linux/if_arp.h>
-#include <linux/if_ether.h>
-#include <linux/ip.h>
-#include <linux/if_vlan.h>
-#include <linux/igmp.h>
#include <linux/in.h>
#include <linux/in_route.h>
#include <linux/inetdevice.h>
#include <linux/version.h>
#include <linux/workqueue.h>
#include <linux/rculist.h>
-
-#include <net/dsfield.h>
-#include <net/dst.h>
-#include <net/icmp.h>
-#include <net/inet_ecn.h>
-#include <net/ip.h>
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
-#include <net/ipv6.h>
-#endif
#include <net/route.h>
#include <net/xfrm.h>
#include "checksum.h"
+#include "compat.h"
#include "datapath.h"
#include "tunnel.h"
#include "vlan.h"
#include "vport.h"
-#include "vport-generic.h"
-#include "vport-internal_dev.h"
-
-#define PORT_TABLE_SIZE 1024
-
-static struct hlist_head *port_table __read_mostly;
-
-/*
- * These are just used as an optimization: they don't require any kind of
- * synchronization because we could have just as easily read the value before
- * the port change happened.
- */
-static unsigned int key_local_remote_ports __read_mostly;
-static unsigned int key_remote_ports __read_mostly;
-static unsigned int key_multicast_ports __read_mostly;
-static unsigned int local_remote_ports __read_mostly;
-static unsigned int remote_ports __read_mostly;
-static unsigned int null_ports __read_mostly;
-static unsigned int multicast_ports __read_mostly;
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
-#define rt_dst(rt) (rt->dst)
-#else
-#define rt_dst(rt) (rt->u.dst)
-#endif
-
-static struct vport *tnl_vport_to_vport(const struct tnl_vport *tnl_vport)
-{
- return vport_from_priv(tnl_vport);
-}
-
-static void free_config_rcu(struct rcu_head *rcu)
-{
- struct tnl_mutable_config *c = container_of(rcu, struct tnl_mutable_config, rcu);
- kfree(c);
-}
-
-/* Frees the portion of 'mutable' that requires RTNL and thus can't happen
- * within an RCU callback. Fortunately this part doesn't require waiting for
- * an RCU grace period.
- */
-static void free_mutable_rtnl(struct tnl_mutable_config *mutable)
-{
- ASSERT_RTNL();
- if (ipv4_is_multicast(mutable->key.daddr) && mutable->mlink) {
- struct in_device *in_dev;
- in_dev = inetdev_by_index(port_key_get_net(&mutable->key), mutable->mlink);
- if (in_dev)
- ip_mc_dec_group(in_dev, mutable->key.daddr);
- }
-}
-
-static void assign_config_rcu(struct vport *vport,
- struct tnl_mutable_config *new_config)
-{
- struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- struct tnl_mutable_config *old_config;
-
- old_config = rtnl_dereference(tnl_vport->mutable);
- rcu_assign_pointer(tnl_vport->mutable, new_config);
-
- free_mutable_rtnl(old_config);
- call_rcu(&old_config->rcu, free_config_rcu);
-}
-
-static unsigned int *find_port_pool(const struct tnl_mutable_config *mutable)
-{
- bool is_multicast = ipv4_is_multicast(mutable->key.daddr);
-
- if (mutable->flags & TNL_F_IN_KEY_MATCH) {
- if (mutable->key.saddr)
- return &local_remote_ports;
- else if (is_multicast)
- return &multicast_ports;
- else
- return &remote_ports;
- } else {
- if (mutable->key.saddr)
- return &key_local_remote_ports;
- else if (is_multicast)
- return &key_multicast_ports;
- else if (mutable->key.daddr)
- return &key_remote_ports;
- else
- return &null_ports;
- }
-}
-
-static u32 port_hash(const struct port_lookup_key *key)
-{
- return jhash2((u32 *)key, (PORT_KEY_LEN / sizeof(u32)), 0);
-}
-
-static struct hlist_head *find_bucket(u32 hash)
-{
- return &port_table[(hash & (PORT_TABLE_SIZE - 1))];
-}
-
-static void port_table_add_port(struct vport *vport)
-{
- struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- const struct tnl_mutable_config *mutable;
- u32 hash;
-
- mutable = rtnl_dereference(tnl_vport->mutable);
- hash = port_hash(&mutable->key);
- hlist_add_head_rcu(&tnl_vport->hash_node, find_bucket(hash));
-
- (*find_port_pool(rtnl_dereference(tnl_vport->mutable)))++;
-}
-
-static void port_table_move_port(struct vport *vport,
- struct tnl_mutable_config *new_mutable)
-{
- struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- u32 hash;
-
- hash = port_hash(&new_mutable->key);
- hlist_del_init_rcu(&tnl_vport->hash_node);
- hlist_add_head_rcu(&tnl_vport->hash_node, find_bucket(hash));
-
- (*find_port_pool(rtnl_dereference(tnl_vport->mutable)))--;
- assign_config_rcu(vport, new_mutable);
- (*find_port_pool(rtnl_dereference(tnl_vport->mutable)))++;
-}
-
-static void port_table_remove_port(struct vport *vport)
-{
- struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
-
- hlist_del_init_rcu(&tnl_vport->hash_node);
-
- (*find_port_pool(rtnl_dereference(tnl_vport->mutable)))--;
-}
-
-static struct vport *port_table_lookup(struct port_lookup_key *key,
- const struct tnl_mutable_config **pmutable)
-{
- struct hlist_node *n;
- struct hlist_head *bucket;
- u32 hash = port_hash(key);
- struct tnl_vport *tnl_vport;
-
- bucket = find_bucket(hash);
-
- hlist_for_each_entry_rcu(tnl_vport, n, bucket, hash_node) {
- struct tnl_mutable_config *mutable;
-
- mutable = rcu_dereference_rtnl(tnl_vport->mutable);
- if (!memcmp(&mutable->key, key, PORT_KEY_LEN)) {
- *pmutable = mutable;
- return tnl_vport_to_vport(tnl_vport);
- }
- }
-
- return NULL;
-}
-
-struct vport *ovs_tnl_find_port(struct net *net, __be32 saddr, __be32 daddr,
- __be64 key, int tunnel_type,
- const struct tnl_mutable_config **mutable)
-{
- struct port_lookup_key lookup;
- struct vport *vport;
- bool is_multicast = ipv4_is_multicast(saddr);
-
- port_key_set_net(&lookup, net);
- lookup.saddr = saddr;
- lookup.daddr = daddr;
-
- /* First try for exact match on in_key. */
- lookup.in_key = key;
- lookup.tunnel_type = tunnel_type | TNL_T_KEY_EXACT;
- if (!is_multicast && key_local_remote_ports) {
- vport = port_table_lookup(&lookup, mutable);
- if (vport)
- return vport;
- }
- if (key_remote_ports) {
- lookup.saddr = 0;
- vport = port_table_lookup(&lookup, mutable);
- if (vport)
- return vport;
-
- lookup.saddr = saddr;
- }
-
- /* Then try matches that wildcard in_key. */
- lookup.in_key = 0;
- lookup.tunnel_type = tunnel_type | TNL_T_KEY_MATCH;
- if (!is_multicast && local_remote_ports) {
- vport = port_table_lookup(&lookup, mutable);
- if (vport)
- return vport;
- }
- if (remote_ports) {
- lookup.saddr = 0;
- vport = port_table_lookup(&lookup, mutable);
- if (vport)
- return vport;
- }
-
- if (is_multicast) {
- lookup.saddr = 0;
- lookup.daddr = saddr;
- if (key_multicast_ports) {
- lookup.tunnel_type = tunnel_type | TNL_T_KEY_EXACT;
- lookup.in_key = key;
- vport = port_table_lookup(&lookup, mutable);
- if (vport)
- return vport;
- }
- if (multicast_ports) {
- lookup.tunnel_type = tunnel_type | TNL_T_KEY_MATCH;
- lookup.in_key = 0;
- vport = port_table_lookup(&lookup, mutable);
- if (vport)
- return vport;
- }
- }
-
- if (null_ports) {
- lookup.daddr = 0;
- lookup.saddr = 0;
- lookup.tunnel_type = tunnel_type;
- vport = port_table_lookup(&lookup, mutable);
- if (vport)
- return vport;
- }
- return NULL;
-}
-
-static void ecn_decapsulate(struct sk_buff *skb)
-{
- if (unlikely(INET_ECN_is_ce(OVS_CB(skb)->tun_key->ipv4_tos))) {
- __be16 protocol = skb->protocol;
-
- skb_set_network_header(skb, ETH_HLEN);
-
- if (protocol == htons(ETH_P_8021Q)) {
- if (unlikely(!pskb_may_pull(skb, VLAN_ETH_HLEN)))
- return;
-
- protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
- skb_set_network_header(skb, VLAN_ETH_HLEN);
- }
-
- if (protocol == htons(ETH_P_IP)) {
- if (unlikely(!pskb_may_pull(skb, skb_network_offset(skb)
- + sizeof(struct iphdr))))
- return;
-
- IP_ECN_set_ce(ip_hdr(skb));
- }
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
- else if (protocol == htons(ETH_P_IPV6)) {
- if (unlikely(!pskb_may_pull(skb, skb_network_offset(skb)
- + sizeof(struct ipv6hdr))))
- return;
-
- IP6_ECN_set_ce(ipv6_hdr(skb));
- }
-#endif
- }
-}
/**
* ovs_tnl_rcv - ingress point for generic tunnel code
* - skb->csum does not include the inner Ethernet header.
* - The layer pointers are undefined.
*/
-void ovs_tnl_rcv(struct vport *vport, struct sk_buff *skb)
+void ovs_tnl_rcv(struct vport *vport, struct sk_buff *skb,
+ struct ovs_key_ipv4_tunnel *tun_key)
{
struct ethhdr *eh;
skb_reset_mac_header(skb);
eh = eth_hdr(skb);
- if (likely(ntohs(eh->h_proto) >= 1536))
+ if (likely(ntohs(eh->h_proto) >= ETH_P_802_3_MIN))
skb->protocol = eh->h_proto;
else
skb->protocol = htons(ETH_P_802_2);
nf_reset(skb);
skb_clear_rxhash(skb);
secpath_reset(skb);
-
- ecn_decapsulate(skb);
vlan_set_tci(skb, 0);
if (unlikely(compute_ip_summed(skb, false))) {
return;
}
- ovs_vport_receive(vport, skb);
-}
-
-static bool check_ipv4_address(__be32 addr)
-{
- if (ipv4_is_multicast(addr) || ipv4_is_lbcast(addr)
- || ipv4_is_loopback(addr) || ipv4_is_zeronet(addr))
- return false;
-
- return true;
+ ovs_vport_receive(vport, skb, tun_key);
}
-static bool ipv4_should_icmp(struct sk_buff *skb)
-{
- struct iphdr *old_iph = ip_hdr(skb);
-
- /* Don't respond to L2 broadcast. */
- if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
- return false;
-
- /* Don't respond to L3 broadcast or invalid addresses. */
- if (!check_ipv4_address(old_iph->daddr) ||
- !check_ipv4_address(old_iph->saddr))
- return false;
-
- /* Only respond to the first fragment. */
- if (old_iph->frag_off & htons(IP_OFFSET))
- return false;
-
- /* Don't respond to ICMP error messages. */
- if (old_iph->protocol == IPPROTO_ICMP) {
- u8 icmp_type, *icmp_typep;
-
- icmp_typep = skb_header_pointer(skb, (u8 *)old_iph +
- (old_iph->ihl << 2) +
- offsetof(struct icmphdr, type) -
- skb->data, sizeof(icmp_type),
- &icmp_type);
-
- if (!icmp_typep)
- return false;
-
- if (*icmp_typep > NR_ICMP_TYPES
- || (*icmp_typep <= ICMP_PARAMETERPROB
- && *icmp_typep != ICMP_ECHOREPLY
- && *icmp_typep != ICMP_ECHO))
- return false;
- }
-
- return true;
-}
-
-static void ipv4_build_icmp(struct sk_buff *skb, struct sk_buff *nskb,
- unsigned int mtu, unsigned int payload_length)
-{
- struct iphdr *iph, *old_iph = ip_hdr(skb);
- struct icmphdr *icmph;
- u8 *payload;
-
- iph = (struct iphdr *)skb_put(nskb, sizeof(struct iphdr));
- icmph = (struct icmphdr *)skb_put(nskb, sizeof(struct icmphdr));
- payload = skb_put(nskb, payload_length);
-
- /* IP */
- iph->version = 4;
- iph->ihl = sizeof(struct iphdr) >> 2;
- iph->tos = (old_iph->tos & IPTOS_TOS_MASK) |
- IPTOS_PREC_INTERNETCONTROL;
- iph->tot_len = htons(sizeof(struct iphdr)
- + sizeof(struct icmphdr)
- + payload_length);
- get_random_bytes(&iph->id, sizeof(iph->id));
- iph->frag_off = 0;
- iph->ttl = IPDEFTTL;
- iph->protocol = IPPROTO_ICMP;
- iph->daddr = old_iph->saddr;
- iph->saddr = old_iph->daddr;
-
- ip_send_check(iph);
-
- /* ICMP */
- icmph->type = ICMP_DEST_UNREACH;
- icmph->code = ICMP_FRAG_NEEDED;
- icmph->un.gateway = htonl(mtu);
- icmph->checksum = 0;
-
- nskb->csum = csum_partial((u8 *)icmph, sizeof(struct icmphdr), 0);
- nskb->csum = skb_copy_and_csum_bits(skb, (u8 *)old_iph - skb->data,
- payload, payload_length,
- nskb->csum);
- icmph->checksum = csum_fold(nskb->csum);
-}
-
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
-static bool ipv6_should_icmp(struct sk_buff *skb)
-{
- struct ipv6hdr *old_ipv6h = ipv6_hdr(skb);
- int addr_type;
- int payload_off = (u8 *)(old_ipv6h + 1) - skb->data;
- u8 nexthdr = ipv6_hdr(skb)->nexthdr;
- __be16 frag_off;
-
- /* Check source address is valid. */
- addr_type = ipv6_addr_type(&old_ipv6h->saddr);
- if (addr_type & IPV6_ADDR_MULTICAST || addr_type == IPV6_ADDR_ANY)
- return false;
-
- /* Don't reply to unspecified addresses. */
- if (ipv6_addr_type(&old_ipv6h->daddr) == IPV6_ADDR_ANY)
- return false;
-
- /* Don't respond to ICMP error messages. */
- payload_off = ipv6_skip_exthdr(skb, payload_off, &nexthdr, &frag_off);
- if (payload_off < 0)
- return false;
-
- if (nexthdr == NEXTHDR_ICMP) {
- u8 icmp_type, *icmp_typep;
-
- icmp_typep = skb_header_pointer(skb, payload_off +
- offsetof(struct icmp6hdr,
- icmp6_type),
- sizeof(icmp_type), &icmp_type);
-
- if (!icmp_typep || !(*icmp_typep & ICMPV6_INFOMSG_MASK))
- return false;
- }
-
- return true;
-}
-
-static void ipv6_build_icmp(struct sk_buff *skb, struct sk_buff *nskb,
- unsigned int mtu, unsigned int payload_length)
-{
- struct ipv6hdr *ipv6h, *old_ipv6h = ipv6_hdr(skb);
- struct icmp6hdr *icmp6h;
- u8 *payload;
-
- ipv6h = (struct ipv6hdr *)skb_put(nskb, sizeof(struct ipv6hdr));
- icmp6h = (struct icmp6hdr *)skb_put(nskb, sizeof(struct icmp6hdr));
- payload = skb_put(nskb, payload_length);
-
- /* IPv6 */
- ipv6h->version = 6;
- ipv6h->priority = 0;
- memset(&ipv6h->flow_lbl, 0, sizeof(ipv6h->flow_lbl));
- ipv6h->payload_len = htons(sizeof(struct icmp6hdr)
- + payload_length);
- ipv6h->nexthdr = NEXTHDR_ICMP;
- ipv6h->hop_limit = IPV6_DEFAULT_HOPLIMIT;
- ipv6h->daddr = old_ipv6h->saddr;
- ipv6h->saddr = old_ipv6h->daddr;
-
- /* ICMPv6 */
- icmp6h->icmp6_type = ICMPV6_PKT_TOOBIG;
- icmp6h->icmp6_code = 0;
- icmp6h->icmp6_cksum = 0;
- icmp6h->icmp6_mtu = htonl(mtu);
-
- nskb->csum = csum_partial((u8 *)icmp6h, sizeof(struct icmp6hdr), 0);
- nskb->csum = skb_copy_and_csum_bits(skb, (u8 *)old_ipv6h - skb->data,
- payload, payload_length,
- nskb->csum);
- icmp6h->icmp6_cksum = csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr,
- sizeof(struct icmp6hdr)
- + payload_length,
- ipv6h->nexthdr, nskb->csum);
-}
-#endif /* IPv6 */
-
-bool ovs_tnl_frag_needed(struct vport *vport,
- const struct tnl_mutable_config *mutable,
- struct sk_buff *skb, unsigned int mtu)
-{
- unsigned int eth_hdr_len = ETH_HLEN;
- unsigned int total_length = 0, header_length = 0, payload_length;
- struct ethhdr *eh, *old_eh = eth_hdr(skb);
- struct sk_buff *nskb;
-
- /* Sanity check */
- if (skb->protocol == htons(ETH_P_IP)) {
- if (mtu < IP_MIN_MTU)
- return false;
-
- if (!ipv4_should_icmp(skb))
- return true;
- }
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
- else if (skb->protocol == htons(ETH_P_IPV6)) {
- if (mtu < IPV6_MIN_MTU)
- return false;
-
- /*
- * In theory we should do PMTUD on IPv6 multicast messages but
- * we don't have an address to send from so just fragment.
- */
- if (ipv6_addr_type(&ipv6_hdr(skb)->daddr) & IPV6_ADDR_MULTICAST)
- return false;
-
- if (!ipv6_should_icmp(skb))
- return true;
- }
-#endif
- else
- return false;
-
- /* Allocate */
- if (old_eh->h_proto == htons(ETH_P_8021Q))
- eth_hdr_len = VLAN_ETH_HLEN;
-
- payload_length = skb->len - eth_hdr_len;
- if (skb->protocol == htons(ETH_P_IP)) {
- header_length = sizeof(struct iphdr) + sizeof(struct icmphdr);
- total_length = min_t(unsigned int, header_length +
- payload_length, 576);
- }
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
- else {
- header_length = sizeof(struct ipv6hdr) +
- sizeof(struct icmp6hdr);
- total_length = min_t(unsigned int, header_length +
- payload_length, IPV6_MIN_MTU);
- }
-#endif
-
- payload_length = total_length - header_length;
-
- nskb = dev_alloc_skb(NET_IP_ALIGN + eth_hdr_len + header_length +
- payload_length);
- if (!nskb)
- return false;
-
- skb_reserve(nskb, NET_IP_ALIGN);
-
- /* Ethernet / VLAN */
- eh = (struct ethhdr *)skb_put(nskb, eth_hdr_len);
- memcpy(eh->h_dest, old_eh->h_source, ETH_ALEN);
- memcpy(eh->h_source, mutable->eth_addr, ETH_ALEN);
- nskb->protocol = eh->h_proto = old_eh->h_proto;
- if (old_eh->h_proto == htons(ETH_P_8021Q)) {
- struct vlan_ethhdr *vh = (struct vlan_ethhdr *)eh;
-
- vh->h_vlan_TCI = vlan_eth_hdr(skb)->h_vlan_TCI;
- vh->h_vlan_encapsulated_proto = skb->protocol;
- } else
- vlan_set_tci(nskb, vlan_get_tci(skb));
- skb_reset_mac_header(nskb);
-
- /* Protocol */
- if (skb->protocol == htons(ETH_P_IP))
- ipv4_build_icmp(skb, nskb, mtu, payload_length);
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
- else
- ipv6_build_icmp(skb, nskb, mtu, payload_length);
-#endif
-
- if (unlikely(compute_ip_summed(nskb, false))) {
- kfree_skb(nskb);
- return false;
- }
-
- ovs_vport_receive(vport, nskb);
-
- return true;
-}
-
-static bool check_mtu(struct sk_buff *skb,
- struct vport *vport,
- const struct tnl_mutable_config *mutable,
- const struct rtable *rt, __be16 *frag_offp,
- int tunnel_hlen)
-{
- bool df_inherit;
- bool pmtud;
- __be16 frag_off;
- int mtu = 0;
- unsigned int packet_length = skb->len - ETH_HLEN;
-
- if (OVS_CB(skb)->tun_key->ipv4_dst) {
- df_inherit = false;
- pmtud = false;
- frag_off = OVS_CB(skb)->tun_key->tun_flags & OVS_TNL_F_DONT_FRAGMENT ?
- htons(IP_DF) : 0;
- } else {
- df_inherit = mutable->flags & TNL_F_DF_INHERIT;
- pmtud = mutable->flags & TNL_F_PMTUD;
- frag_off = mutable->flags & TNL_F_DF_DEFAULT ? htons(IP_DF) : 0;
- }
-
- /* Allow for one level of tagging in the packet length. */
- if (!vlan_tx_tag_present(skb) &&
- eth_hdr(skb)->h_proto == htons(ETH_P_8021Q))
- packet_length -= VLAN_HLEN;
-
- if (pmtud) {
- int vlan_header = 0;
-
- /* The tag needs to go in packet regardless of where it
- * currently is, so subtract it from the MTU.
- */
- if (vlan_tx_tag_present(skb) ||
- eth_hdr(skb)->h_proto == htons(ETH_P_8021Q))
- vlan_header = VLAN_HLEN;
-
- mtu = dst_mtu(&rt_dst(rt))
- - ETH_HLEN
- - tunnel_hlen
- - vlan_header;
- }
-
- if (skb->protocol == htons(ETH_P_IP)) {
- struct iphdr *iph = ip_hdr(skb);
-
- if (df_inherit)
- frag_off = iph->frag_off & htons(IP_DF);
-
- if (pmtud && iph->frag_off & htons(IP_DF)) {
- mtu = max(mtu, IP_MIN_MTU);
-
- if (packet_length > mtu &&
- ovs_tnl_frag_needed(vport, mutable, skb, mtu))
- return false;
- }
- }
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
- else if (skb->protocol == htons(ETH_P_IPV6)) {
- /* IPv6 requires end hosts to do fragmentation
- * if the packet is above the minimum MTU.
- */
- if (df_inherit && packet_length > IPV6_MIN_MTU)
- frag_off = htons(IP_DF);
-
- if (pmtud) {
- mtu = max(mtu, IPV6_MIN_MTU);
-
- if (packet_length > mtu &&
- ovs_tnl_frag_needed(vport, mutable, skb, mtu))
- return false;
- }
- }
-#endif
-
- *frag_offp = frag_off;
- return true;
-}
-
-static struct rtable *find_route(struct net *net,
- __be32 *saddr, __be32 daddr, u8 ipproto,
- u8 tos)
+struct rtable *find_route(struct net *net,
+ __be32 *saddr, __be32 daddr, u8 ipproto,
+ u8 tos, u32 skb_mark)
{
struct rtable *rt;
/* Tunnel configuration keeps DSCP part of TOS bits, But Linux
struct flowi fl = { .nl_u = { .ip4_u = {
.daddr = daddr,
.saddr = *saddr,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
+ .fwmark = skb_mark,
+#endif
.tos = RT_TOS(tos) } },
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
+ .mark = skb_mark,
+#endif
.proto = ipproto };
if (unlikely(ip_route_output_key(net, &rt, &fl)))
struct flowi4 fl = { .daddr = daddr,
.saddr = *saddr,
.flowi4_tos = RT_TOS(tos),
+ .flowi4_mark = skb_mark,
.flowi4_proto = ipproto };
rt = ip_route_output_key(net, &fl);
return false;
}
-static struct sk_buff *handle_offloads(struct sk_buff *skb,
- const struct tnl_mutable_config *mutable,
- const struct rtable *rt,
- int tunnel_hlen)
+static struct sk_buff *handle_offloads(struct sk_buff *skb)
{
- int min_headroom;
int err;
- min_headroom = LL_RESERVED_SPACE(rt_dst(rt).dev) + rt_dst(rt).header_len
- + tunnel_hlen
- + (vlan_tx_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 error_free;
- }
-
forward_ip_summed(skb, true);
if (skb_is_gso(skb)) {
struct sk_buff *nskb;
- nskb = skb_gso_segment(skb, 0);
+ nskb = __skb_gso_segment(skb, 0, false);
if (IS_ERR(nskb)) {
- kfree_skb(skb);
err = PTR_ERR(nskb);
goto error;
}
if (unlikely(need_linearize(skb))) {
err = __skb_linearize(skb);
if (unlikely(err))
- goto error_free;
+ goto error;
}
err = skb_checksum_help(skb);
if (unlikely(err))
- goto error_free;
+ goto error;
}
set_ip_summed(skb, OVS_CSUM_NONE);
return skb;
-error_free:
- kfree_skb(skb);
error:
return ERR_PTR(err);
}
-static int send_frags(struct sk_buff *skb,
- int tunnel_hlen)
+/* Compute source UDP port for outgoing packet.
+ * Currently we use the flow hash.
+ */
+u16 ovs_tnl_get_src_port(struct sk_buff *skb)
{
- int sent_len;
-
- sent_len = 0;
- while (skb) {
- struct sk_buff *next = skb->next;
- int frag_len = skb->len - tunnel_hlen;
- int err;
-
- skb->next = NULL;
- memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
-
- err = ip_local_out(skb);
- skb = next;
- if (unlikely(net_xmit_eval(err)))
- goto free_frags;
- sent_len += frag_len;
- }
+ int low;
+ int high;
+ unsigned int range;
+ struct sw_flow_key *pkt_key = OVS_CB(skb)->pkt_key;
+ u32 hash = jhash2((const u32 *)pkt_key,
+ sizeof(*pkt_key) / sizeof(u32), 0);
- return sent_len;
-
-free_frags:
- /*
- * There's no point in continuing to send fragments once one has been
- * dropped so just free the rest. This may help improve the congestion
- * that caused the first packet to be dropped.
- */
- ovs_tnl_free_linked_skbs(skb);
- return sent_len;
+ inet_get_local_port_range(&low, &high);
+ range = (high - low) + 1;
+ return (((u64) hash * range) >> 32) + low;
}
-int ovs_tnl_send(struct vport *vport, struct sk_buff *skb)
+int ovs_tnl_send(struct vport *vport, struct sk_buff *skb,
+ u8 ipproto, int tunnel_hlen,
+ void (*build_header)(const struct vport *,
+ struct sk_buff *,
+ int tunnel_hlen))
{
- struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- const struct tnl_mutable_config *mutable = rcu_dereference(tnl_vport->mutable);
- enum vport_err_type err = VPORT_E_TX_ERROR;
+ int min_headroom;
struct rtable *rt;
- struct ovs_key_ipv4_tunnel tun_key;
- int sent_len = 0;
- int tunnel_hlen;
- __be16 frag_off = 0;
- __be32 daddr;
__be32 saddr;
- u8 ttl;
- u8 tos;
-
- /* Validate the protocol headers before we try to use them. */
- if (skb->protocol == htons(ETH_P_8021Q) &&
- !vlan_tx_tag_present(skb)) {
- if (unlikely(!pskb_may_pull(skb, VLAN_ETH_HLEN)))
- goto error_free;
-
- skb->protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
- skb_set_network_header(skb, VLAN_ETH_HLEN);
- }
-
- if (skb->protocol == htons(ETH_P_IP)) {
- if (unlikely(!pskb_may_pull(skb, skb_network_offset(skb)
- + sizeof(struct iphdr))))
- skb->protocol = 0;
- }
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
- else if (skb->protocol == htons(ETH_P_IPV6)) {
- if (unlikely(!pskb_may_pull(skb, skb_network_offset(skb)
- + sizeof(struct ipv6hdr))))
- skb->protocol = 0;
- }
-#endif
+ int sent_len = 0;
+ int err;
+ struct sk_buff *nskb;
- /* If OVS_CB(skb)->tun_key is NULL, point it at the local tun_key here,
- * and zero it out.
- */
- if (!OVS_CB(skb)->tun_key) {
- memset(&tun_key, 0, sizeof(tun_key));
- OVS_CB(skb)->tun_key = &tun_key;
+ /* Route lookup */
+ saddr = OVS_CB(skb)->tun_key->ipv4_src;
+ rt = find_route(ovs_dp_get_net(vport->dp),
+ &saddr,
+ OVS_CB(skb)->tun_key->ipv4_dst,
+ ipproto,
+ OVS_CB(skb)->tun_key->ipv4_tos,
+ skb_get_mark(skb));
+ if (IS_ERR(rt)) {
+ err = PTR_ERR(rt);
+ goto error;
}
- tunnel_hlen = tnl_vport->tnl_ops->hdr_len(mutable, OVS_CB(skb)->tun_key);
- if (unlikely(tunnel_hlen < 0)) {
- err = VPORT_E_TX_DROPPED;
- goto error_free;
- }
tunnel_hlen += sizeof(struct iphdr);
- if (OVS_CB(skb)->tun_key->ipv4_dst) {
- daddr = OVS_CB(skb)->tun_key->ipv4_dst;
- saddr = OVS_CB(skb)->tun_key->ipv4_src;
- tos = OVS_CB(skb)->tun_key->ipv4_tos;
- ttl = OVS_CB(skb)->tun_key->ipv4_ttl;
- } else {
- u8 inner_tos;
- daddr = mutable->key.daddr;
- saddr = mutable->key.saddr;
-
- if (unlikely(!daddr)) {
- /* Trying to sent packet from Null-port without
- * tunnel info? Drop this packet. */
- err = VPORT_E_TX_DROPPED;
- goto error_free;
- }
-
- /* ToS */
- if (skb->protocol == htons(ETH_P_IP))
- inner_tos = ip_hdr(skb)->tos;
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
- else if (skb->protocol == htons(ETH_P_IPV6))
- inner_tos = ipv6_get_dsfield(ipv6_hdr(skb));
-#endif
- else
- inner_tos = 0;
-
- if (mutable->flags & TNL_F_TOS_INHERIT)
- tos = inner_tos;
- else
- tos = mutable->tos;
-
- tos = INET_ECN_encapsulate(tos, inner_tos);
+ min_headroom = LL_RESERVED_SPACE(rt_dst(rt).dev) + rt_dst(rt).header_len
+ + tunnel_hlen
+ + (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0);
- /* TTL */
- ttl = mutable->ttl;
- if (mutable->flags & TNL_F_TTL_INHERIT) {
- if (skb->protocol == htons(ETH_P_IP))
- ttl = ip_hdr(skb)->ttl;
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
- else if (skb->protocol == htons(ETH_P_IPV6))
- ttl = ipv6_hdr(skb)->hop_limit;
-#endif
- }
+ 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;
}
- /* Route lookup */
- rt = find_route(port_key_get_net(&mutable->key), &saddr, daddr,
- tnl_vport->tnl_ops->ipproto, tos);
- if (IS_ERR(rt))
- goto error_free;
+ /* Offloading */
+ nskb = handle_offloads(skb);
+ if (IS_ERR(nskb)) {
+ err = PTR_ERR(nskb);
+ goto err_free_rt;
+ }
+ skb = nskb;
/* Reset SKB */
nf_reset(skb);
skb_dst_drop(skb);
skb_clear_rxhash(skb);
- /* Offloading */
- skb = handle_offloads(skb, mutable, rt, tunnel_hlen);
- if (IS_ERR(skb)) {
- skb = NULL;
- goto err_free_rt;
- }
-
- /* MTU */
- if (unlikely(!check_mtu(skb, vport, mutable, rt, &frag_off, tunnel_hlen))) {
- err = VPORT_E_TX_DROPPED;
- goto err_free_rt;
- }
-
- /* TTL Fixup. */
- if (!OVS_CB(skb)->tun_key->ipv4_dst) {
- if (!(mutable->flags & TNL_F_TTL_INHERIT)) {
- if (!ttl)
- ttl = ip4_dst_hoplimit(&rt_dst(rt));
- }
- }
-
while (skb) {
- struct iphdr *iph;
struct sk_buff *next_skb = skb->next;
+ struct iphdr *iph;
+ int frag_len;
+
skb->next = NULL;
if (unlikely(vlan_deaccel_tag(skb)))
goto next;
+ frag_len = skb->len;
skb_push(skb, tunnel_hlen);
skb_reset_network_header(skb);
skb_set_transport_header(skb, sizeof(struct iphdr));
else
skb_dst_set(skb, &rt_dst(rt));
+ /* Push Tunnel header. */
+ build_header(vport, skb, tunnel_hlen);
+
/* Push IP header. */
iph = ip_hdr(skb);
iph->version = 4;
iph->ihl = sizeof(struct iphdr) >> 2;
- iph->protocol = tnl_vport->tnl_ops->ipproto;
- iph->daddr = daddr;
+ iph->protocol = ipproto;
+ iph->daddr = OVS_CB(skb)->tun_key->ipv4_dst;
iph->saddr = saddr;
- iph->tos = tos;
- iph->ttl = ttl;
- iph->frag_off = frag_off;
- ip_select_ident(iph, &rt_dst(rt), NULL);
+ iph->tos = OVS_CB(skb)->tun_key->ipv4_tos;
+ iph->ttl = OVS_CB(skb)->tun_key->ipv4_ttl;
+ iph->frag_off = OVS_CB(skb)->tun_key->tun_flags &
+ TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
+ /*
+ * Allow our local IP stack to fragment the outer packet even
+ * if the DF bit is set as a last resort. We also need to
+ * force selection of an IP ID here with __ip_select_ident(),
+ * as ip_select_ident() assumes a proper ID is not needed when
+ * when the DF bit is set.
+ */
+ skb->local_df = 1;
+ __ip_select_ident(iph, skb_dst(skb), 0);
- /* Push Tunnel header. */
- skb = tnl_vport->tnl_ops->build_header(vport, mutable,
- &rt_dst(rt), skb, tunnel_hlen);
- if (unlikely(!skb))
+ memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
+
+ err = ip_local_out(skb);
+ if (unlikely(net_xmit_eval(err)))
goto next;
- sent_len += send_frags(skb, tunnel_hlen);
+ sent_len += frag_len;
next:
skb = next_skb;
}
- if (unlikely(sent_len == 0))
- ovs_vport_record_error(vport, VPORT_E_TX_DROPPED);
-
return sent_len;
err_free_rt:
ip_rt_put(rt);
-error_free:
- ovs_tnl_free_linked_skbs(skb);
- ovs_vport_record_error(vport, err);
- return sent_len;
-}
-
-static const struct nla_policy tnl_policy[OVS_TUNNEL_ATTR_MAX + 1] = {
- [OVS_TUNNEL_ATTR_FLAGS] = { .type = NLA_U32 },
- [OVS_TUNNEL_ATTR_DST_IPV4] = { .type = NLA_U32 },
- [OVS_TUNNEL_ATTR_SRC_IPV4] = { .type = NLA_U32 },
- [OVS_TUNNEL_ATTR_OUT_KEY] = { .type = NLA_U64 },
- [OVS_TUNNEL_ATTR_IN_KEY] = { .type = NLA_U64 },
- [OVS_TUNNEL_ATTR_TOS] = { .type = NLA_U8 },
- [OVS_TUNNEL_ATTR_TTL] = { .type = NLA_U8 },
- [OVS_TUNNEL_ATTR_DST_PORT] = { .type = NLA_U16 },
-};
-
-/* Sets OVS_TUNNEL_ATTR_* fields in 'mutable', which must initially be
- * zeroed. */
-static int tnl_set_config(struct net *net, struct nlattr *options,
- const struct tnl_ops *tnl_ops,
- const struct vport *cur_vport,
- struct tnl_mutable_config *mutable)
-{
- const struct vport *old_vport;
- const struct tnl_mutable_config *old_mutable;
- struct nlattr *a[OVS_TUNNEL_ATTR_MAX + 1];
- int err;
-
- port_key_set_net(&mutable->key, net);
- mutable->key.tunnel_type = tnl_ops->tunnel_type;
- if (!options)
- goto out;
-
- err = nla_parse_nested(a, OVS_TUNNEL_ATTR_MAX, options, tnl_policy);
- if (err)
- return err;
-
- if (!a[OVS_TUNNEL_ATTR_FLAGS] || !a[OVS_TUNNEL_ATTR_DST_IPV4])
- return -EINVAL;
-
- mutable->flags = nla_get_u32(a[OVS_TUNNEL_ATTR_FLAGS]) & TNL_F_PUBLIC;
- mutable->key.daddr = nla_get_be32(a[OVS_TUNNEL_ATTR_DST_IPV4]);
-
- if (a[OVS_TUNNEL_ATTR_SRC_IPV4]) {
- if (ipv4_is_multicast(mutable->key.daddr))
- return -EINVAL;
- mutable->key.saddr = nla_get_be32(a[OVS_TUNNEL_ATTR_SRC_IPV4]);
- }
-
- if (a[OVS_TUNNEL_ATTR_TOS]) {
- mutable->tos = nla_get_u8(a[OVS_TUNNEL_ATTR_TOS]);
- /* Reject ToS config with ECN bits set. */
- if (mutable->tos & INET_ECN_MASK)
- return -EINVAL;
- }
-
- if (a[OVS_TUNNEL_ATTR_TTL])
- mutable->ttl = nla_get_u8(a[OVS_TUNNEL_ATTR_TTL]);
-
- if (a[OVS_TUNNEL_ATTR_DST_PORT])
- mutable->dst_port =
- htons(nla_get_u16(a[OVS_TUNNEL_ATTR_DST_PORT]));
-
- if (!a[OVS_TUNNEL_ATTR_IN_KEY]) {
- mutable->key.tunnel_type |= TNL_T_KEY_MATCH;
- mutable->flags |= TNL_F_IN_KEY_MATCH;
- } else {
- mutable->key.tunnel_type |= TNL_T_KEY_EXACT;
- mutable->key.in_key = nla_get_be64(a[OVS_TUNNEL_ATTR_IN_KEY]);
- }
-
- if (!a[OVS_TUNNEL_ATTR_OUT_KEY])
- mutable->flags |= TNL_F_OUT_KEY_ACTION;
- else
- mutable->out_key = nla_get_be64(a[OVS_TUNNEL_ATTR_OUT_KEY]);
-
- mutable->mlink = 0;
- if (ipv4_is_multicast(mutable->key.daddr)) {
- struct net_device *dev;
- struct rtable *rt;
- __be32 saddr = mutable->key.saddr;
-
- rt = find_route(port_key_get_net(&mutable->key),
- &saddr, mutable->key.daddr,
- tnl_ops->ipproto, mutable->tos);
- if (IS_ERR(rt))
- return -EADDRNOTAVAIL;
- dev = rt_dst(rt).dev;
- ip_rt_put(rt);
- if (__in_dev_get_rtnl(dev) == NULL)
- return -EADDRNOTAVAIL;
- mutable->mlink = dev->ifindex;
- ip_mc_inc_group(__in_dev_get_rtnl(dev), mutable->key.daddr);
- }
-
-out:
- old_vport = port_table_lookup(&mutable->key, &old_mutable);
- if (old_vport && old_vport != cur_vport)
- return -EEXIST;
-
- return 0;
-}
-
-struct vport *ovs_tnl_create(const struct vport_parms *parms,
- const struct vport_ops *vport_ops,
- const struct tnl_ops *tnl_ops)
-{
- struct vport *vport;
- struct tnl_vport *tnl_vport;
- struct tnl_mutable_config *mutable;
- int initial_frag_id;
- int err;
-
- vport = ovs_vport_alloc(sizeof(struct tnl_vport), vport_ops, parms);
- if (IS_ERR(vport)) {
- err = PTR_ERR(vport);
- goto error;
- }
-
- tnl_vport = tnl_vport_priv(vport);
-
- strcpy(tnl_vport->name, parms->name);
- tnl_vport->tnl_ops = tnl_ops;
-
- mutable = kzalloc(sizeof(struct tnl_mutable_config), GFP_KERNEL);
- if (!mutable) {
- err = -ENOMEM;
- goto error_free_vport;
- }
-
- random_ether_addr(mutable->eth_addr);
-
- get_random_bytes(&initial_frag_id, sizeof(int));
- atomic_set(&tnl_vport->frag_id, initial_frag_id);
-
- err = tnl_set_config(ovs_dp_get_net(parms->dp), parms->options, tnl_ops,
- NULL, mutable);
- if (err)
- goto error_free_mutable;
-
- rcu_assign_pointer(tnl_vport->mutable, mutable);
-
- port_table_add_port(vport);
- return vport;
-
-error_free_mutable:
- free_mutable_rtnl(mutable);
- kfree(mutable);
-error_free_vport:
- ovs_vport_free(vport);
-error:
- return ERR_PTR(err);
-}
-
-int ovs_tnl_set_options(struct vport *vport, struct nlattr *options)
-{
- struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- const struct tnl_mutable_config *old_mutable;
- struct tnl_mutable_config *mutable;
- int err;
-
- old_mutable = rtnl_dereference(tnl_vport->mutable);
- if (!old_mutable->key.daddr)
- return -EINVAL;
-
- mutable = kzalloc(sizeof(struct tnl_mutable_config), GFP_KERNEL);
- if (!mutable) {
- err = -ENOMEM;
- goto error;
- }
-
- /* Copy fields whose values should be retained. */
- mutable->seq = old_mutable->seq + 1;
- memcpy(mutable->eth_addr, old_mutable->eth_addr, ETH_ALEN);
-
- /* Parse the others configured by userspace. */
- err = tnl_set_config(ovs_dp_get_net(vport->dp), options, tnl_vport->tnl_ops,
- vport, mutable);
- if (err)
- goto error_free;
-
- if (port_hash(&mutable->key) != port_hash(&old_mutable->key))
- port_table_move_port(vport, mutable);
- else
- assign_config_rcu(vport, mutable);
-
- return 0;
-
-error_free:
- free_mutable_rtnl(mutable);
- kfree(mutable);
error:
return err;
}
-
-int ovs_tnl_get_options(const struct vport *vport, struct sk_buff *skb)
-{
- const struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- const struct tnl_mutable_config *mutable = rcu_dereference_rtnl(tnl_vport->mutable);
-
- if (nla_put_u32(skb, OVS_TUNNEL_ATTR_FLAGS,
- mutable->flags & TNL_F_PUBLIC) ||
- nla_put_be32(skb, OVS_TUNNEL_ATTR_DST_IPV4, mutable->key.daddr))
- goto nla_put_failure;
-
- if (!(mutable->flags & TNL_F_IN_KEY_MATCH) &&
- nla_put_be64(skb, OVS_TUNNEL_ATTR_IN_KEY, mutable->key.in_key))
- goto nla_put_failure;
- if (!(mutable->flags & TNL_F_OUT_KEY_ACTION) &&
- nla_put_be64(skb, OVS_TUNNEL_ATTR_OUT_KEY, mutable->out_key))
- goto nla_put_failure;
- if (mutable->key.saddr &&
- nla_put_be32(skb, OVS_TUNNEL_ATTR_SRC_IPV4, mutable->key.saddr))
- goto nla_put_failure;
- if (mutable->tos && nla_put_u8(skb, OVS_TUNNEL_ATTR_TOS, mutable->tos))
- goto nla_put_failure;
- if (mutable->ttl && nla_put_u8(skb, OVS_TUNNEL_ATTR_TTL, mutable->ttl))
- goto nla_put_failure;
- if (mutable->dst_port && nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT,
- ntohs(mutable->dst_port)))
- goto nla_put_failure;
-
- return 0;
-
-nla_put_failure:
- return -EMSGSIZE;
-}
-
-static void free_port_rcu(struct rcu_head *rcu)
-{
- struct tnl_vport *tnl_vport = container_of(rcu,
- struct tnl_vport, rcu);
-
- kfree((struct tnl_mutable __force *)tnl_vport->mutable);
- ovs_vport_free(tnl_vport_to_vport(tnl_vport));
-}
-
-void ovs_tnl_destroy(struct vport *vport)
-{
- struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- struct tnl_mutable_config *mutable;
-
- mutable = rtnl_dereference(tnl_vport->mutable);
- port_table_remove_port(vport);
- free_mutable_rtnl(mutable);
- call_rcu(&tnl_vport->rcu, free_port_rcu);
-}
-
-int ovs_tnl_set_addr(struct vport *vport, const unsigned char *addr)
-{
- struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- struct tnl_mutable_config *old_mutable, *mutable;
-
- old_mutable = rtnl_dereference(tnl_vport->mutable);
- mutable = kmemdup(old_mutable, sizeof(struct tnl_mutable_config), GFP_KERNEL);
- if (!mutable)
- return -ENOMEM;
-
- old_mutable->mlink = 0;
-
- memcpy(mutable->eth_addr, addr, ETH_ALEN);
- assign_config_rcu(vport, mutable);
-
- return 0;
-}
-
-const char *ovs_tnl_get_name(const struct vport *vport)
-{
- const struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- return tnl_vport->name;
-}
-
-const unsigned char *ovs_tnl_get_addr(const struct vport *vport)
-{
- const struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- return rcu_dereference_rtnl(tnl_vport->mutable)->eth_addr;
-}
-
-void ovs_tnl_free_linked_skbs(struct sk_buff *skb)
-{
- while (skb) {
- struct sk_buff *next = skb->next;
- kfree_skb(skb);
- skb = next;
- }
-}
-
-int ovs_tnl_init(void)
-{
- int i;
-
- port_table = kmalloc(PORT_TABLE_SIZE * sizeof(struct hlist_head *),
- GFP_KERNEL);
- if (!port_table)
- return -ENOMEM;
-
- for (i = 0; i < PORT_TABLE_SIZE; i++)
- INIT_HLIST_HEAD(&port_table[i]);
-
- return 0;
-}
-
-void ovs_tnl_exit(void)
-{
- kfree(port_table);
-}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff