/*
- * Copyright (c) 2010, 2011 Nicira Networks.
- * Distributed under the terms of the GNU GPL version 2.
+ * Copyright (c) 2007-2012 Nicira, Inc.
*
- * Significant portions of this file may be copied from parts of the Linux
- * kernel, by Linus Torvalds and others.
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
*/
-#include <linux/if_arp.h>
-#include <linux/if_ether.h>
-#include <linux/ip.h>
-#include <linux/if_vlan.h>
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/in.h>
#include <linux/in_route.h>
+#include <linux/inetdevice.h>
#include <linux/jhash.h>
#include <linux/list.h>
#include <linux/kernel.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 "actions.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"
-
-#ifdef NEED_CACHE_TIMEOUT
-/*
- * On kernels where we can't quickly detect changes in the rest of the system
- * we use an expiration time to invalidate the cache. A shorter expiration
- * reduces the length of time that we may potentially blackhole packets while
- * a longer time increases performance by reducing the frequency that the
- * cache needs to be rebuilt. A variety of factors may cause the cache to be
- * invalidated before the expiration time but this is the maximum. The time
- * is expressed in jiffies.
- */
-#define MAX_CACHE_EXP HZ
-#endif
-
-/*
- * Interval to check for and remove caches that are no longer valid. Caches
- * are checked for validity before they are used for packet encapsulation and
- * old caches are removed at that time. However, if no packets are sent through
- * the tunnel then the cache will never be destroyed. Since it holds
- * references to a number of system objects, the cache will continue to use
- * system resources by not allowing those objects to be destroyed. The cache
- * cleaner is periodically run to free invalid caches. It does not
- * significantly affect system performance. A lower interval will release
- * resources faster but will itself consume resources by requiring more frequent
- * checks. A longer interval may result in messages being printed to the kernel
- * message buffer about unreleased resources. The interval is expressed in
- * jiffies.
- */
-#define CACHE_CLEANER_INTERVAL (5 * HZ)
-
-#define CACHE_DATA_ALIGN 16
-#define PORT_TABLE_SIZE 1024
-
-static struct hlist_head *port_table __read_mostly;
-static int port_table_count;
-
-static void cache_cleaner(struct work_struct *work);
-static DECLARE_DELAYED_WORK(cache_cleaner_wq, cache_cleaner);
-
-/*
- * 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 local_remote_ports __read_mostly;
-static unsigned int remote_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 inline struct vport *tnl_vport_to_vport(const struct tnl_vport *tnl_vport)
-{
- return vport_from_priv(tnl_vport);
-}
-
-/* This is analogous to rtnl_dereference for the tunnel cache. It checks that
- * cache_lock is held, so it is only for update side code.
- */
-static inline struct tnl_cache *cache_dereference(struct tnl_vport *tnl_vport)
-{
- return rcu_dereference_protected(tnl_vport->cache,
- lockdep_is_held(&tnl_vport->cache_lock));
-}
-
-static inline void schedule_cache_cleaner(void)
-{
- schedule_delayed_work(&cache_cleaner_wq, CACHE_CLEANER_INTERVAL);
-}
-
-static void free_cache(struct tnl_cache *cache)
-{
- if (!cache)
- return;
-
- flow_put(cache->flow);
- ip_rt_put(cache->rt);
- kfree(cache);
-}
-
-static void free_config_rcu(struct rcu_head *rcu)
-{
- struct tnl_mutable_config *c = container_of(rcu, struct tnl_mutable_config, rcu);
- kfree(c);
-}
-
-static void free_cache_rcu(struct rcu_head *rcu)
-{
- struct tnl_cache *c = container_of(rcu, struct tnl_cache, rcu);
- free_cache(c);
-}
-
-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);
- call_rcu(&old_config->rcu, free_config_rcu);
-}
-
-static void assign_cache_rcu(struct vport *vport, struct tnl_cache *new_cache)
-{
- struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- struct tnl_cache *old_cache;
-
- old_cache = cache_dereference(tnl_vport);
- rcu_assign_pointer(tnl_vport->cache, new_cache);
-
- if (old_cache)
- call_rcu(&old_cache->rcu, free_cache_rcu);
-}
-
-static unsigned int *find_port_pool(const struct tnl_mutable_config *mutable)
-{
- if (mutable->flags & TNL_F_IN_KEY_MATCH) {
- if (mutable->saddr)
- return &local_remote_ports;
- else
- return &remote_ports;
- } else {
- if (mutable->saddr)
- return &key_local_remote_ports;
- else
- return &key_remote_ports;
- }
-}
-
-struct port_lookup_key {
- const struct tnl_mutable_config *mutable;
- __be64 key;
- u32 tunnel_type;
- __be32 saddr;
- __be32 daddr;
-};
-
-/*
- * Modifies 'target' to store the rcu_dereferenced pointer that was used to do
- * the comparision.
- */
-static int port_cmp(const struct tnl_vport *tnl_vport,
- struct port_lookup_key *lookup)
-{
- lookup->mutable = rcu_dereference_rtnl(tnl_vport->mutable);
-
- return (lookup->mutable->tunnel_type == lookup->tunnel_type &&
- lookup->mutable->daddr == lookup->daddr &&
- lookup->mutable->in_key == lookup->key &&
- lookup->mutable->saddr == lookup->saddr);
-}
-
-static u32 port_hash(struct port_lookup_key *k)
-{
- u32 x = jhash_3words((__force u32)k->saddr, (__force u32)k->daddr,
- k->tunnel_type, 0);
- return jhash_2words((__force u64)k->key >> 32, (__force u32)k->key, x);
-}
-
-static u32 mutable_hash(const struct tnl_mutable_config *mutable)
-{
- struct port_lookup_key lookup;
-
- lookup.saddr = mutable->saddr;
- lookup.daddr = mutable->daddr;
- lookup.key = mutable->in_key;
- lookup.tunnel_type = mutable->tunnel_type;
-
- return port_hash(&lookup);
-}
-
-
-static inline 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);
- u32 hash = mutable_hash(rtnl_dereference(tnl_vport->mutable));
-
- if (port_table_count == 0)
- schedule_cache_cleaner();
-
- hlist_add_head_rcu(&tnl_vport->hash_node, find_bucket(hash));
- port_table_count++;
-
- (*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 = mutable_hash(new_mutable);
- 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);
-
- port_table_count--;
- if (port_table_count == 0)
- cancel_delayed_work_sync(&cache_cleaner_wq);
-
- (*find_port_pool(rtnl_dereference(tnl_vport->mutable)))--;
-}
-
-static struct tnl_vport *port_table_lookup(struct port_lookup_key *lookup)
-{
- struct hlist_node *n;
- struct hlist_head *bucket;
- u32 hash = port_hash(lookup);
- struct tnl_vport * tnl_vport;
-
- bucket = find_bucket(hash);
-
- hlist_for_each_entry_rcu(tnl_vport, n, bucket, hash_node) {
- if (port_cmp(tnl_vport, lookup))
- return tnl_vport;
- }
-
- return NULL;
-}
-
-struct vport *tnl_find_port(__be32 saddr, __be32 daddr, __be64 key,
- int tunnel_type,
- const struct tnl_mutable_config **mutable)
-{
- struct port_lookup_key lookup;
- struct tnl_vport * tnl_vport;
-
- lookup.saddr = saddr;
- lookup.daddr = daddr;
-
- if (tunnel_type & TNL_T_KEY_EXACT) {
- lookup.key = key;
- lookup.tunnel_type = tunnel_type & ~TNL_T_KEY_MATCH;
-
- if (key_local_remote_ports) {
- tnl_vport = port_table_lookup(&lookup);
- if (tnl_vport)
- goto found;
- }
-
- if (key_remote_ports) {
- lookup.saddr = 0;
- tnl_vport = port_table_lookup(&lookup);
- if (tnl_vport)
- goto found;
-
- lookup.saddr = saddr;
- }
- }
-
- if (tunnel_type & TNL_T_KEY_MATCH) {
- lookup.key = 0;
- lookup.tunnel_type = tunnel_type & ~TNL_T_KEY_EXACT;
-
- if (local_remote_ports) {
- tnl_vport = port_table_lookup(&lookup);
- if (tnl_vport)
- goto found;
- }
-
- if (remote_ports) {
- lookup.saddr = 0;
- tnl_vport = port_table_lookup(&lookup);
- if (tnl_vport)
- goto found;
- }
- }
-
- return NULL;
-
-found:
- *mutable = lookup.mutable;
- return tnl_vport_to_vport(tnl_vport);
-}
-
-static void ecn_decapsulate(struct sk_buff *skb, u8 tos)
-{
- if (unlikely(INET_ECN_is_ce(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
- }
-}
/**
- * tnl_rcv - ingress point for generic tunnel code
+ * ovs_tnl_rcv - ingress point for generic tunnel code
*
* @vport: port this packet was received on
* @skb: received packet
* - skb->csum does not include the inner Ethernet header.
* - The layer pointers are undefined.
*/
-void tnl_rcv(struct vport *vport, struct sk_buff *skb, u8 tos)
+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, tos);
vlan_set_tci(skb, 0);
if (unlikely(compute_ip_summed(skb, false))) {
return;
}
- 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;
-}
-
-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;
+ ovs_vport_receive(vport, skb, tun_key);
}
-static void ipv4_build_icmp(struct sk_buff *skb, struct sk_buff *nskb,
- unsigned int mtu, unsigned int payload_length)
+struct rtable *find_route(struct net *net,
+ __be32 *saddr, __be32 daddr, u8 ipproto,
+ u8 tos, u32 skb_mark)
{
- 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;
-
- /* 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);
- 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;
- ipv6_addr_copy(&ipv6h->daddr, &old_ipv6h->saddr);
- ipv6_addr_copy(&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 tnl_frag_needed(struct vport *vport, const struct tnl_mutable_config *mutable,
- struct sk_buff *skb, unsigned int mtu, __be64 flow_key)
-{
- 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
-
- /*
- * Assume that flow based keys are symmetric with respect to input
- * and output and use the key that we were going to put on the
- * outgoing packet for the fake received packet. If the keys are
- * not symmetric then PMTUD needs to be disabled since we won't have
- * any way of synthesizing packets.
- */
- if ((mutable->flags & (TNL_F_IN_KEY_MATCH | TNL_F_OUT_KEY_ACTION)) ==
- (TNL_F_IN_KEY_MATCH | TNL_F_OUT_KEY_ACTION))
- OVS_CB(nskb)->tun_id = flow_key;
-
- if (unlikely(compute_ip_summed(nskb, false))) {
- kfree_skb(nskb);
- return false;
- }
-
- 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)
-{
- bool df_inherit = mutable->flags & TNL_F_DF_INHERIT;
- bool pmtud = mutable->flags & TNL_F_PMTUD;
- __be16 frag_off = mutable->flags & TNL_F_DF_DEFAULT ? htons(IP_DF) : 0;
- int mtu = 0;
- unsigned int packet_length = skb->len - ETH_HLEN;
-
- /* 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
- - mutable->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 &&
- tnl_frag_needed(vport, mutable, skb, mtu,
- OVS_CB(skb)->tun_id))
- 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 &&
- tnl_frag_needed(vport, mutable, skb, mtu,
- OVS_CB(skb)->tun_id))
- return false;
- }
- }
-#endif
-
- *frag_offp = frag_off;
- return true;
-}
-
-static void create_tunnel_header(const struct vport *vport,
- const struct tnl_mutable_config *mutable,
- const struct rtable *rt, void *header)
-{
- struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- struct iphdr *iph = header;
-
- iph->version = 4;
- iph->ihl = sizeof(struct iphdr) >> 2;
- iph->frag_off = htons(IP_DF);
- iph->protocol = tnl_vport->tnl_ops->ipproto;
- iph->tos = mutable->tos;
- iph->daddr = rt->rt_dst;
- iph->saddr = rt->rt_src;
- iph->ttl = mutable->ttl;
- if (!iph->ttl)
- iph->ttl = ip4_dst_hoplimit(&rt_dst(rt));
-
- tnl_vport->tnl_ops->build_header(vport, mutable, iph + 1);
-}
-
-static inline void *get_cached_header(const struct tnl_cache *cache)
-{
- return (void *)cache + ALIGN(sizeof(struct tnl_cache), CACHE_DATA_ALIGN);
-}
-
-static inline bool check_cache_valid(const struct tnl_cache *cache,
- const struct tnl_mutable_config *mutable)
-{
- return cache &&
-#ifdef NEED_CACHE_TIMEOUT
- time_before(jiffies, cache->expiration) &&
-#endif
-#ifdef HAVE_RT_GENID
- atomic_read(&init_net.ipv4.rt_genid) == cache->rt->rt_genid &&
-#endif
-#ifdef HAVE_HH_SEQ
- rt_dst(cache->rt).hh->hh_lock.sequence == cache->hh_seq &&
-#endif
- mutable->seq == cache->mutable_seq &&
- (!is_internal_dev(rt_dst(cache->rt).dev) ||
- (cache->flow && !cache->flow->dead));
-}
-
-static void __cache_cleaner(struct tnl_vport *tnl_vport)
-{
- const struct tnl_mutable_config *mutable =
- rcu_dereference(tnl_vport->mutable);
- const struct tnl_cache *cache = rcu_dereference(tnl_vport->cache);
-
- if (cache && !check_cache_valid(cache, mutable) &&
- spin_trylock_bh(&tnl_vport->cache_lock)) {
- assign_cache_rcu(tnl_vport_to_vport(tnl_vport), NULL);
- spin_unlock_bh(&tnl_vport->cache_lock);
- }
-}
-
-static void cache_cleaner(struct work_struct *work)
-{
- int i;
-
- schedule_cache_cleaner();
-
- rcu_read_lock();
- for (i = 0; i < PORT_TABLE_SIZE; i++) {
- struct hlist_node *n;
- struct hlist_head *bucket;
- struct tnl_vport *tnl_vport;
-
- bucket = &port_table[i];
- hlist_for_each_entry_rcu(tnl_vport, n, bucket, hash_node)
- __cache_cleaner(tnl_vport);
- }
- rcu_read_unlock();
-}
-
-static inline void create_eth_hdr(struct tnl_cache *cache,
- const struct rtable *rt)
-{
- void *cache_data = get_cached_header(cache);
- int hh_len = rt_dst(rt).hh->hh_len;
- int hh_off = HH_DATA_ALIGN(rt_dst(rt).hh->hh_len) - hh_len;
-
-#ifdef HAVE_HH_SEQ
- unsigned hh_seq;
-
- do {
- hh_seq = read_seqbegin(&rt_dst(rt).hh->hh_lock);
- memcpy(cache_data, (void *)rt_dst(rt).hh->hh_data + hh_off, hh_len);
- } while (read_seqretry(&rt_dst(rt).hh->hh_lock, hh_seq));
+ struct rtable *rt;
+ /* Tunnel configuration keeps DSCP part of TOS bits, But Linux
+ * router expect RT_TOS bits only. */
- cache->hh_seq = hh_seq;
-#else
- read_lock_bh(&rt_dst(rt).hh->hh_lock);
- memcpy(cache_data, (void *)rt_dst(rt).hh->hh_data + hh_off, hh_len);
- read_unlock_bh(&rt_dst(rt).hh->hh_lock);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
+ struct flowi fl = { .nl_u = { .ip4_u = {
+ .daddr = daddr,
+ .saddr = *saddr,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
+ .fwmark = skb_mark,
#endif
-}
-
-static struct tnl_cache *build_cache(struct vport *vport,
- const struct tnl_mutable_config *mutable,
- struct rtable *rt)
-{
- struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- struct tnl_cache *cache;
- void *cache_data;
- int cache_len;
-
- if (!(mutable->flags & TNL_F_HDR_CACHE))
- return NULL;
-
- /*
- * If there is no entry in the ARP cache or if this device does not
- * support hard header caching just fall back to the IP stack.
- */
- if (!rt_dst(rt).hh)
- return NULL;
-
- /*
- * If lock is contended fall back to directly building the header.
- * We're not going to help performance by sitting here spinning.
- */
- if (!spin_trylock_bh(&tnl_vport->cache_lock))
- return NULL;
-
- cache = cache_dereference(tnl_vport);
- if (check_cache_valid(cache, mutable))
- goto unlock;
- else
- cache = NULL;
-
- cache_len = rt_dst(rt).hh->hh_len + mutable->tunnel_hlen;
-
- cache = kzalloc(ALIGN(sizeof(struct tnl_cache), CACHE_DATA_ALIGN) +
- cache_len, GFP_ATOMIC);
- if (!cache)
- goto unlock;
-
- cache->len = cache_len;
-
- create_eth_hdr(cache, rt);
- cache_data = get_cached_header(cache) + rt_dst(rt).hh->hh_len;
-
- create_tunnel_header(vport, mutable, rt, cache_data);
-
- cache->mutable_seq = mutable->seq;
- cache->rt = rt;
-#ifdef NEED_CACHE_TIMEOUT
- cache->expiration = jiffies + tnl_vport->cache_exp_interval;
+ .tos = RT_TOS(tos) } },
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
+ .mark = skb_mark,
#endif
+ .proto = ipproto };
- if (is_internal_dev(rt_dst(rt).dev)) {
- struct sw_flow_key flow_key;
- struct vport *dst_vport;
- struct sk_buff *skb;
- bool is_frag;
- int err;
- int flow_key_len;
- struct sw_flow *flow;
-
- dst_vport = internal_dev_get_vport(rt_dst(rt).dev);
- if (!dst_vport)
- goto done;
-
- skb = alloc_skb(cache->len, GFP_ATOMIC);
- if (!skb)
- goto done;
-
- __skb_put(skb, cache->len);
- memcpy(skb->data, get_cached_header(cache), cache->len);
-
- err = flow_extract(skb, dst_vport->port_no, &flow_key,
- &flow_key_len, &is_frag);
-
- consume_skb(skb);
- if (err || is_frag)
- goto done;
-
- flow = flow_tbl_lookup(rcu_dereference(dst_vport->dp->table),
- &flow_key, flow_key_len);
- if (flow) {
- cache->flow = flow;
- flow_hold(flow);
- }
- }
-
-done:
- assign_cache_rcu(vport, cache);
-
-unlock:
- spin_unlock_bh(&tnl_vport->cache_lock);
-
- return cache;
-}
-
-static struct rtable *find_route(struct vport *vport,
- const struct tnl_mutable_config *mutable,
- u8 tos, struct tnl_cache **cache)
-{
- struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- struct tnl_cache *cur_cache = rcu_dereference(tnl_vport->cache);
-
- *cache = NULL;
- tos = RT_TOS(tos);
-
- if (likely(tos == mutable->tos && check_cache_valid(cur_cache, mutable))) {
- *cache = cur_cache;
- return cur_cache->rt;
- } else {
- struct rtable *rt;
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
- struct flowi fl = { .nl_u = { .ip4_u =
- { .daddr = mutable->daddr,
- .saddr = mutable->saddr,
- .tos = tos } },
- .proto = tnl_vport->tnl_ops->ipproto };
-
- if (unlikely(ip_route_output_key(&init_net, &rt, &fl)))
- return NULL;
+ if (unlikely(ip_route_output_key(net, &rt, &fl)))
+ return ERR_PTR(-EADDRNOTAVAIL);
+ *saddr = fl.nl_u.ip4_u.saddr;
+ return rt;
#else
- struct flowi4 fl = { .daddr = mutable->daddr,
- .saddr = mutable->saddr,
- .flowi4_tos = tos,
- .flowi4_proto = tnl_vport->tnl_ops->ipproto };
-
- rt = ip_route_output_key(&init_net, &fl);
- if (IS_ERR(rt))
- return NULL;
+ 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);
+ *saddr = fl.saddr;
+ return rt;
#endif
-
- if (likely(tos == mutable->tos))
- *cache = build_cache(vport, mutable, rt);
-
- return rt;
- }
}
-static inline bool need_linearize(const struct sk_buff *skb)
+static bool need_linearize(const struct sk_buff *skb)
{
int i;
* change them from underneath us and we can skip the linearization.
*/
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
- if (unlikely(page_count(skb_shinfo(skb)->frags[i].page) > 1))
+ if (unlikely(page_count(skb_frag_page(&skb_shinfo(skb)->frags[i])) > 1))
return true;
return false;
}
-static struct sk_buff *handle_offloads(struct sk_buff *skb,
- const struct tnl_mutable_config *mutable,
- const struct rtable *rt)
+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
- + mutable->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,
- const struct tnl_mutable_config *mutable)
+/* 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 - mutable->tunnel_hlen;
- int err;
-
- skb->next = NULL;
- memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
+ 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);
- err = ip_local_out(skb);
- skb = next;
- if (unlikely(net_xmit_eval(err)))
- goto free_frags;
- sent_len += frag_len;
- }
-
- 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.
- */
- 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 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 dst_entry *unattached_dst = NULL;
- struct tnl_cache *cache;
+ __be32 saddr;
int sent_len = 0;
- __be16 frag_off = 0;
- u8 ttl;
- u8 inner_tos;
- 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;
+ int err;
+ struct sk_buff *nskb;
- skb->protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
- skb_set_network_header(skb, VLAN_ETH_HLEN);
+ /* 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;
}
- 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
+ tunnel_hlen += sizeof(struct iphdr);
- /* 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;
+ 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 (mutable->flags & TNL_F_TOS_INHERIT)
- tos = inner_tos;
- else
- tos = mutable->tos;
+ if (skb_headroom(skb) < min_headroom || skb_header_cloned(skb)) {
+ int head_delta = SKB_DATA_ALIGN(min_headroom -
+ skb_headroom(skb) +
+ 16);
- tos = INET_ECN_encapsulate(tos, inner_tos);
+ 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(vport, mutable, tos, &cache);
- if (unlikely(!rt))
- goto error_free;
- if (unlikely(!cache))
- unattached_dst = &rt_dst(rt);
+ /* 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);
- if (IS_ERR(skb))
- goto error;
-
- /* MTU */
- if (unlikely(!check_mtu(skb, vport, mutable, rt, &frag_off))) {
- err = VPORT_E_TX_DROPPED;
- goto error_free;
- }
-
- /*
- * If we are over the MTU, allow the IP stack to handle fragmentation.
- * Fragmentation is a slow path anyways.
- */
- if (unlikely(skb->len + mutable->tunnel_hlen > dst_mtu(&rt_dst(rt)) &&
- cache)) {
- unattached_dst = &rt_dst(rt);
- dst_hold(unattached_dst);
- cache = NULL;
- }
-
- /* TTL */
- ttl = mutable->ttl;
- if (!ttl)
- ttl = ip4_dst_hoplimit(&rt_dst(rt));
-
- 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
- }
-
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;
- if (likely(cache)) {
- skb_push(skb, cache->len);
- memcpy(skb->data, get_cached_header(cache), cache->len);
- skb_reset_mac_header(skb);
- skb_set_network_header(skb, rt_dst(rt).hh->hh_len);
+ frag_len = skb->len;
+ skb_push(skb, tunnel_hlen);
+ skb_reset_network_header(skb);
+ skb_set_transport_header(skb, sizeof(struct iphdr));
- } else {
- skb_push(skb, mutable->tunnel_hlen);
- create_tunnel_header(vport, mutable, rt, skb->data);
- skb_reset_network_header(skb);
+ if (next_skb)
+ skb_dst_set(skb, dst_clone(&rt_dst(rt)));
+ else
+ skb_dst_set(skb, &rt_dst(rt));
- if (next_skb)
- skb_dst_set(skb, dst_clone(unattached_dst));
- else {
- skb_dst_set(skb, unattached_dst);
- unattached_dst = NULL;
- }
- }
- skb_set_transport_header(skb, skb_network_offset(skb) + sizeof(struct iphdr));
+ /* Push Tunnel header. */
+ build_header(vport, skb, tunnel_hlen);
+ /* Push IP header. */
iph = ip_hdr(skb);
- iph->tos = tos;
- iph->ttl = ttl;
- iph->frag_off = frag_off;
- ip_select_ident(iph, &rt_dst(rt), NULL);
-
- skb = tnl_vport->tnl_ops->update_header(vport, mutable, &rt_dst(rt), skb);
- if (unlikely(!skb))
- goto next;
-
- if (likely(cache)) {
- int orig_len = skb->len - cache->len;
- struct vport *cache_vport = internal_dev_get_vport(rt_dst(rt).dev);
-
- skb->protocol = htons(ETH_P_IP);
- iph = ip_hdr(skb);
- iph->tot_len = htons(skb->len - skb_network_offset(skb));
- ip_send_check(iph);
-
- if (cache_vport) {
- if (unlikely(compute_ip_summed(skb, true))) {
- kfree_skb(skb);
- goto next;
- }
+ iph->version = 4;
+ iph->ihl = sizeof(struct iphdr) >> 2;
+ iph->protocol = ipproto;
+ iph->daddr = OVS_CB(skb)->tun_key->ipv4_dst;
+ iph->saddr = saddr;
+ 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);
- OVS_CB(skb)->flow = cache->flow;
- vport_receive(cache_vport, skb);
- sent_len += orig_len;
- } else {
- int xmit_err;
+ memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
- skb->dev = rt_dst(rt).dev;
- xmit_err = dev_queue_xmit(skb);
+ err = ip_local_out(skb);
+ if (unlikely(net_xmit_eval(err)))
+ goto next;
- if (likely(net_xmit_eval(xmit_err) == 0))
- sent_len += orig_len;
- }
- } else
- sent_len += send_frags(skb, mutable);
+ sent_len += frag_len;
next:
skb = next_skb;
}
- if (unlikely(sent_len == 0))
- vport_record_error(vport, VPORT_E_TX_DROPPED);
-
- goto out;
-
-error_free:
- tnl_free_linked_skbs(skb);
-error:
- vport_record_error(vport, err);
-out:
- dst_release(unattached_dst);
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 },
-};
-
-/* Sets OVS_TUNNEL_ATTR_* fields in 'mutable', which must initially be zeroed. */
-static int tnl_set_config(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;
-
- if (!options)
- return -EINVAL;
-
- 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;
-
- if (a[OVS_TUNNEL_ATTR_SRC_IPV4])
- mutable->saddr = nla_get_be32(a[OVS_TUNNEL_ATTR_SRC_IPV4]);
- mutable->daddr = nla_get_be32(a[OVS_TUNNEL_ATTR_DST_IPV4]);
-
- if (a[OVS_TUNNEL_ATTR_TOS]) {
- mutable->tos = nla_get_u8(a[OVS_TUNNEL_ATTR_TOS]);
- if (mutable->tos != RT_TOS(mutable->tos))
- return -EINVAL;
- }
-
- if (a[OVS_TUNNEL_ATTR_TTL])
- mutable->ttl = nla_get_u8(a[OVS_TUNNEL_ATTR_TTL]);
-
- mutable->tunnel_type = tnl_ops->tunnel_type;
- if (!a[OVS_TUNNEL_ATTR_IN_KEY]) {
- mutable->tunnel_type |= TNL_T_KEY_MATCH;
- mutable->flags |= TNL_F_IN_KEY_MATCH;
- } else {
- mutable->tunnel_type |= TNL_T_KEY_EXACT;
- mutable->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->tunnel_hlen = tnl_ops->hdr_len(mutable);
- if (mutable->tunnel_hlen < 0)
- return mutable->tunnel_hlen;
-
- mutable->tunnel_hlen += sizeof(struct iphdr);
-
- old_vport = tnl_find_port(mutable->saddr, mutable->daddr,
- mutable->in_key, mutable->tunnel_type,
- &old_mutable);
-
- if (old_vport && old_vport != cur_vport)
- return -EEXIST;
-
- return 0;
-}
-
-struct vport *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 = 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;
- }
-
- vport_gen_rand_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(parms->options, tnl_ops, NULL, mutable);
- if (err)
- goto error_free_mutable;
-
- spin_lock_init(&tnl_vport->cache_lock);
-
-#ifdef NEED_CACHE_TIMEOUT
- tnl_vport->cache_exp_interval = MAX_CACHE_EXP -
- (net_random() % (MAX_CACHE_EXP / 2));
-#endif
-
- rcu_assign_pointer(tnl_vport->mutable, mutable);
-
- port_table_add_port(vport);
- return vport;
-error_free_mutable:
- kfree(mutable);
-error_free_vport:
- vport_free(vport);
-error:
- return ERR_PTR(err);
-}
-
-int 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;
-
- mutable = kzalloc(sizeof(struct tnl_mutable_config), GFP_KERNEL);
- if (!mutable) {
- err = -ENOMEM;
- goto error;
- }
-
- /* Copy fields whose values should be retained. */
- old_mutable = rtnl_dereference(tnl_vport->mutable);
- 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(options, tnl_vport->tnl_ops, vport, mutable);
- if (err)
- goto error_free;
-
- if (mutable_hash(mutable) != mutable_hash(old_mutable))
- port_table_move_port(vport, mutable);
-
- return 0;
-
-error_free:
- kfree(mutable);
+err_free_rt:
+ ip_rt_put(rt);
error:
return err;
}
-
-int 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);
-
- NLA_PUT_U32(skb, OVS_TUNNEL_ATTR_FLAGS, mutable->flags & TNL_F_PUBLIC);
- NLA_PUT_BE32(skb, OVS_TUNNEL_ATTR_DST_IPV4, mutable->daddr);
-
- if (!(mutable->flags & TNL_F_IN_KEY_MATCH))
- NLA_PUT_BE64(skb, OVS_TUNNEL_ATTR_IN_KEY, mutable->in_key);
- if (!(mutable->flags & TNL_F_OUT_KEY_ACTION))
- NLA_PUT_BE64(skb, OVS_TUNNEL_ATTR_OUT_KEY, mutable->out_key);
- if (mutable->saddr)
- NLA_PUT_BE32(skb, OVS_TUNNEL_ATTR_SRC_IPV4, mutable->saddr);
- if (mutable->tos)
- NLA_PUT_U8(skb, OVS_TUNNEL_ATTR_TOS, mutable->tos);
- if (mutable->ttl)
- NLA_PUT_U8(skb, OVS_TUNNEL_ATTR_TTL, mutable->ttl);
-
- 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);
-
- free_cache((struct tnl_cache __force *)tnl_vport->cache);
- kfree((struct tnl_mutable __force *)tnl_vport->mutable);
- vport_free(tnl_vport_to_vport(tnl_vport));
-}
-
-void tnl_destroy(struct vport *vport)
-{
- struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- const struct tnl_mutable_config *mutable;
-
- mutable = rtnl_dereference(tnl_vport->mutable);
- port_table_remove_port(vport);
- call_rcu(&tnl_vport->rcu, free_port_rcu);
-}
-
-int tnl_set_addr(struct vport *vport, const unsigned char *addr)
-{
- struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- struct tnl_mutable_config *mutable;
-
- mutable = kmemdup(rtnl_dereference(tnl_vport->mutable),
- sizeof(struct tnl_mutable_config), GFP_KERNEL);
- if (!mutable)
- return -ENOMEM;
-
- memcpy(mutable->eth_addr, addr, ETH_ALEN);
- assign_config_rcu(vport, mutable);
-
- return 0;
-}
-
-const char *tnl_get_name(const struct vport *vport)
-{
- const struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- return tnl_vport->name;
-}
-
-const unsigned char *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 tnl_free_linked_skbs(struct sk_buff *skb)
-{
- while (skb) {
- struct sk_buff *next = skb->next;
- kfree_skb(skb);
- skb = next;
- }
-}
-
-int 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 tnl_exit(void)
-{
- int i;
-
- for (i = 0; i < PORT_TABLE_SIZE; i++) {
- struct tnl_vport * tnl_vport;
- struct hlist_head *hash_head;
- struct hlist_node *n;
-
- hash_head = &port_table[i];
- hlist_for_each_entry(tnl_vport, n, hash_head, hash_node) {
- BUG();
- goto out;
- }
- }
-out:
- kfree(port_table);
-}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff