/*
- * Distributed under the terms of the GNU GPL version 2.
- * Copyright (c) 2007, 2008, 2009, 2010, 2011 Nicira Networks.
+ * Copyright (c) 2007-2014 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 "flow.h"
#include "datapath.h"
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_ether.h>
#include <linux/in.h>
#include <linux/rcupdate.h>
#include <linux/if_arp.h>
-#include <linux/if_ether.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
+#include <linux/sctp.h>
+#include <linux/smp.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/icmp.h>
#include <linux/icmpv6.h>
-#include <net/inet_ecn.h>
+#include <linux/rculist.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/ndisc.h>
-static struct kmem_cache *flow_cache;
-static unsigned int hash_seed __read_mostly;
+#include "vlan.h"
-static inline bool arphdr_ok(struct sk_buff *skb)
+u64 ovs_flow_used_time(unsigned long flow_jiffies)
{
- return skb->len >= skb_network_offset(skb) + sizeof(struct arp_eth_header);
-}
+ struct timespec cur_ts;
+ u64 cur_ms, idle_ms;
-static inline int check_iphdr(struct sk_buff *skb)
-{
- unsigned int nh_ofs = skb_network_offset(skb);
- unsigned int ip_len;
+ ktime_get_ts(&cur_ts);
+ idle_ms = jiffies_to_msecs(jiffies - flow_jiffies);
+ cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC +
+ cur_ts.tv_nsec / NSEC_PER_MSEC;
- if (skb->len < nh_ofs + sizeof(struct iphdr))
- return -EINVAL;
+ return cur_ms - idle_ms;
+}
- ip_len = ip_hdrlen(skb);
- if (ip_len < sizeof(struct iphdr) || skb->len < nh_ofs + ip_len)
- return -EINVAL;
+#define TCP_FLAGS_BE16(tp) (*(__be16 *)&tcp_flag_word(tp) & htons(0x0FFF))
- /*
- * Pull enough header bytes to account for the IP header plus the
- * longest transport header that we parse, currently 20 bytes for TCP.
- */
- if (!pskb_may_pull(skb, min(nh_ofs + ip_len + 20, skb->len)))
- return -ENOMEM;
+void ovs_flow_stats_update(struct sw_flow *flow, __be16 tcp_flags,
+ struct sk_buff *skb)
+{
+ struct flow_stats *stats;
+ int node = numa_node_id();
+
+ stats = rcu_dereference(flow->stats[node]);
+
+ /* Check if already have node-specific stats. */
+ if (likely(stats)) {
+ spin_lock(&stats->lock);
+ /* Mark if we write on the pre-allocated stats. */
+ if (node == 0 && unlikely(flow->stats_last_writer != node))
+ flow->stats_last_writer = node;
+ } else {
+ stats = rcu_dereference(flow->stats[0]); /* Pre-allocated. */
+ spin_lock(&stats->lock);
+
+ /* If the current NUMA-node is the only writer on the
+ * pre-allocated stats keep using them.
+ */
+ if (unlikely(flow->stats_last_writer != node)) {
+ /* A previous locker may have already allocated the
+ * stats, so we need to check again. If node-specific
+ * stats were already allocated, we update the pre-
+ * allocated stats as we have already locked them.
+ */
+ if (likely(flow->stats_last_writer != NUMA_NO_NODE)
+ && likely(!rcu_dereference(flow->stats[node]))) {
+ /* Try to allocate node-specific stats. */
+ struct flow_stats *new_stats;
+
+ new_stats =
+ kmem_cache_alloc_node(flow_stats_cache,
+ GFP_THISNODE |
+ __GFP_NOMEMALLOC,
+ node);
+ if (likely(new_stats)) {
+ new_stats->used = jiffies;
+ new_stats->packet_count = 1;
+ new_stats->byte_count = skb->len;
+ new_stats->tcp_flags = tcp_flags;
+ spin_lock_init(&new_stats->lock);
+
+ rcu_assign_pointer(flow->stats[node],
+ new_stats);
+ goto unlock;
+ }
+ }
+ flow->stats_last_writer = node;
+ }
+ }
- skb_set_transport_header(skb, nh_ofs + ip_len);
- return 0;
+ stats->used = jiffies;
+ stats->packet_count++;
+ stats->byte_count += skb->len;
+ stats->tcp_flags |= tcp_flags;
+unlock:
+ spin_unlock(&stats->lock);
}
-static inline bool tcphdr_ok(struct sk_buff *skb)
+/* Must be called with rcu_read_lock or ovs_mutex. */
+void ovs_flow_stats_get(const struct sw_flow *flow,
+ struct ovs_flow_stats *ovs_stats,
+ unsigned long *used, __be16 *tcp_flags)
{
- int th_ofs = skb_transport_offset(skb);
- if (skb->len >= th_ofs + sizeof(struct tcphdr)) {
- int tcp_len = tcp_hdrlen(skb);
- return (tcp_len >= sizeof(struct tcphdr)
- && skb->len >= th_ofs + tcp_len);
+ int node;
+
+ *used = 0;
+ *tcp_flags = 0;
+ memset(ovs_stats, 0, sizeof(*ovs_stats));
+
+ for_each_node(node) {
+ struct flow_stats *stats = rcu_dereference_ovsl(flow->stats[node]);
+
+ if (stats) {
+ /* Local CPU may write on non-local stats, so we must
+ * block bottom-halves here.
+ */
+ spin_lock_bh(&stats->lock);
+ if (!*used || time_after(stats->used, *used))
+ *used = stats->used;
+ *tcp_flags |= stats->tcp_flags;
+ ovs_stats->n_packets += stats->packet_count;
+ ovs_stats->n_bytes += stats->byte_count;
+ spin_unlock_bh(&stats->lock);
+ }
}
- return false;
}
-static inline bool udphdr_ok(struct sk_buff *skb)
+/* Called with ovs_mutex. */
+void ovs_flow_stats_clear(struct sw_flow *flow)
{
- return skb->len >= skb_transport_offset(skb) + sizeof(struct udphdr);
+ int node;
+
+ for_each_node(node) {
+ struct flow_stats *stats = ovsl_dereference(flow->stats[node]);
+
+ if (stats) {
+ spin_lock_bh(&stats->lock);
+ stats->used = 0;
+ stats->packet_count = 0;
+ stats->byte_count = 0;
+ stats->tcp_flags = 0;
+ spin_unlock_bh(&stats->lock);
+ }
+ }
}
-static inline bool icmphdr_ok(struct sk_buff *skb)
+static int check_header(struct sk_buff *skb, int len)
{
- return skb->len >= skb_transport_offset(skb) + sizeof(struct icmphdr);
+ if (unlikely(skb->len < len))
+ return -EINVAL;
+ if (unlikely(!pskb_may_pull(skb, len)))
+ return -ENOMEM;
+ return 0;
}
-u64 flow_used_time(unsigned long flow_jiffies)
+static bool arphdr_ok(struct sk_buff *skb)
{
- struct timespec cur_ts;
- u64 cur_ms, idle_ms;
-
- ktime_get_ts(&cur_ts);
- idle_ms = jiffies_to_msecs(jiffies - flow_jiffies);
- cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC +
- cur_ts.tv_nsec / NSEC_PER_MSEC;
-
- return cur_ms - idle_ms;
+ return pskb_may_pull(skb, skb_network_offset(skb) +
+ sizeof(struct arp_eth_header));
}
-static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
+static int check_iphdr(struct sk_buff *skb)
{
unsigned int nh_ofs = skb_network_offset(skb);
- unsigned int nh_len;
- int payload_ofs;
- int payload_len;
- struct ipv6hdr *nh;
- uint8_t nexthdr;
-
- if (unlikely(skb->len < nh_ofs + sizeof(*nh)))
- return -EINVAL;
-
- nh = ipv6_hdr(skb);
- nexthdr = nh->nexthdr;
- payload_ofs = (u8 *)(nh + 1) - skb->data;
- payload_len = ntohs(nh->payload_len);
-
- memcpy(key->ipv6_src, nh->saddr.in6_u.u6_addr8, sizeof(key->ipv6_src));
- memcpy(key->ipv6_dst, nh->daddr.in6_u.u6_addr8, sizeof(key->ipv6_dst));
- key->nw_tos = ipv6_get_dsfield(nh) & ~INET_ECN_MASK;
- key->nw_proto = NEXTHDR_NONE;
-
- /* We don't process jumbograms. */
- if (!payload_len)
- return -EINVAL;
-
- if (unlikely(skb->len < nh_ofs + sizeof(*nh) + payload_len))
- return -EINVAL;
+ unsigned int ip_len;
+ int err;
- payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr);
- if (payload_ofs < 0) {
- return -EINVAL;
- }
- nh_len = payload_ofs - nh_ofs;
+ err = check_header(skb, nh_ofs + sizeof(struct iphdr));
+ if (unlikely(err))
+ return err;
- /* Ensure that the payload length claimed is at least large enough
- * for the headers we've already processed. */
- if (payload_len < nh_len - sizeof(*nh))
+ ip_len = ip_hdrlen(skb);
+ if (unlikely(ip_len < sizeof(struct iphdr) ||
+ skb->len < nh_ofs + ip_len))
return -EINVAL;
- /* Pull enough header bytes to account for the IP header plus the
- * longest transport header that we parse, currently 20 bytes for TCP.
- * To dig deeper than the transport header, transport parsers may need
- * to pull more header bytes.
- */
- if (unlikely(!pskb_may_pull(skb, min(nh_ofs + nh_len + 20, skb->len))))
- return -ENOMEM;
-
- skb_set_transport_header(skb, nh_ofs + nh_len);
- key->nw_proto = nexthdr;
- return nh_len;
+ skb_set_transport_header(skb, nh_ofs + ip_len);
+ return 0;
}
-static bool icmp6hdr_ok(struct sk_buff *skb)
+static bool tcphdr_ok(struct sk_buff *skb)
{
- return skb->len >= skb_transport_offset(skb) + sizeof(struct icmp6hdr);
-}
-
-#define TCP_FLAGS_OFFSET 13
-#define TCP_FLAG_MASK 0x3f
+ int th_ofs = skb_transport_offset(skb);
+ int tcp_len;
-void flow_used(struct sw_flow *flow, struct sk_buff *skb)
-{
- u8 tcp_flags = 0;
+ if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr))))
+ return false;
- if (flow->key.dl_type == htons(ETH_P_IP) &&
- flow->key.nw_proto == IPPROTO_TCP) {
- u8 *tcp = (u8 *)tcp_hdr(skb);
- tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK;
- }
+ tcp_len = tcp_hdrlen(skb);
+ if (unlikely(tcp_len < sizeof(struct tcphdr) ||
+ skb->len < th_ofs + tcp_len))
+ return false;
- spin_lock_bh(&flow->lock);
- flow->used = jiffies;
- flow->packet_count++;
- flow->byte_count += skb->len;
- flow->tcp_flags |= tcp_flags;
- spin_unlock_bh(&flow->lock);
+ return true;
}
-struct sw_flow_actions *flow_actions_alloc(const struct nlattr *actions)
+static bool udphdr_ok(struct sk_buff *skb)
{
- int actions_len = nla_len(actions);
- struct sw_flow_actions *sfa;
-
- /* At least DP_MAX_PORTS actions are required to be able to flood a
- * packet to every port. Factor of 2 allows for setting VLAN tags,
- * etc. */
- if (actions_len > 2 * DP_MAX_PORTS * nla_total_size(4))
- return ERR_PTR(-EINVAL);
-
- sfa = kmalloc(sizeof(*sfa) + actions_len, GFP_KERNEL);
- if (!sfa)
- return ERR_PTR(-ENOMEM);
-
- sfa->actions_len = actions_len;
- memcpy(sfa->actions, nla_data(actions), actions_len);
- return sfa;
+ return pskb_may_pull(skb, skb_transport_offset(skb) +
+ sizeof(struct udphdr));
}
-struct sw_flow *flow_alloc(void)
+static bool sctphdr_ok(struct sk_buff *skb)
{
- struct sw_flow *flow;
-
- flow = kmem_cache_alloc(flow_cache, GFP_KERNEL);
- if (!flow)
- return ERR_PTR(-ENOMEM);
-
- spin_lock_init(&flow->lock);
- atomic_set(&flow->refcnt, 1);
- flow->dead = false;
-
- return flow;
+ return pskb_may_pull(skb, skb_transport_offset(skb) +
+ sizeof(struct sctphdr));
}
-void flow_free_tbl(struct tbl_node *node)
+static bool icmphdr_ok(struct sk_buff *skb)
{
- struct sw_flow *flow = flow_cast(node);
-
- flow->dead = true;
- flow_put(flow);
+ return pskb_may_pull(skb, skb_transport_offset(skb) +
+ sizeof(struct icmphdr));
}
-/* RCU callback used by flow_deferred_free. */
-static void rcu_free_flow_callback(struct rcu_head *rcu)
+static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
{
- struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu);
+ unsigned int nh_ofs = skb_network_offset(skb);
+ unsigned int nh_len;
+ int payload_ofs;
+ struct ipv6hdr *nh;
+ uint8_t nexthdr;
+ __be16 frag_off;
+ int err;
- flow->dead = true;
- flow_put(flow);
-}
+ err = check_header(skb, nh_ofs + sizeof(*nh));
+ if (unlikely(err))
+ return err;
-/* Schedules 'flow' to be freed after the next RCU grace period.
- * The caller must hold rcu_read_lock for this to be sensible. */
-void flow_deferred_free(struct sw_flow *flow)
-{
- call_rcu(&flow->rcu, rcu_free_flow_callback);
-}
+ nh = ipv6_hdr(skb);
+ nexthdr = nh->nexthdr;
+ payload_ofs = (u8 *)(nh + 1) - skb->data;
-void flow_hold(struct sw_flow *flow)
-{
- atomic_inc(&flow->refcnt);
-}
+ key->ip.proto = NEXTHDR_NONE;
+ key->ip.tos = ipv6_get_dsfield(nh);
+ key->ip.ttl = nh->hop_limit;
+ key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL);
+ key->ipv6.addr.src = nh->saddr;
+ key->ipv6.addr.dst = nh->daddr;
-void flow_put(struct sw_flow *flow)
-{
- if (unlikely(!flow))
- return;
+ payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off);
+ if (unlikely(payload_ofs < 0))
+ return -EINVAL;
- if (atomic_dec_and_test(&flow->refcnt)) {
- kfree((struct sf_flow_acts __force *)flow->sf_acts);
- kmem_cache_free(flow_cache, flow);
+ if (frag_off) {
+ if (frag_off & htons(~0x7))
+ key->ip.frag = OVS_FRAG_TYPE_LATER;
+ else
+ key->ip.frag = OVS_FRAG_TYPE_FIRST;
}
-}
-/* RCU callback used by flow_deferred_free_acts. */
-static void rcu_free_acts_callback(struct rcu_head *rcu)
-{
- struct sw_flow_actions *sf_acts = container_of(rcu,
- struct sw_flow_actions, rcu);
- kfree(sf_acts);
+ nh_len = payload_ofs - nh_ofs;
+ skb_set_transport_header(skb, nh_ofs + nh_len);
+ key->ip.proto = nexthdr;
+ return nh_len;
}
-/* Schedules 'sf_acts' to be freed after the next RCU grace period.
- * The caller must hold rcu_read_lock for this to be sensible. */
-void flow_deferred_free_acts(struct sw_flow_actions *sf_acts)
+static bool icmp6hdr_ok(struct sk_buff *skb)
{
- call_rcu(&sf_acts->rcu, rcu_free_acts_callback);
+ return pskb_may_pull(skb, skb_transport_offset(skb) +
+ sizeof(struct icmp6hdr));
}
-static void parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
+static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
{
struct qtag_prefix {
__be16 eth_type; /* ETH_P_8021Q */
};
struct qtag_prefix *qp;
- if (skb->len < sizeof(struct qtag_prefix) + sizeof(__be16))
- return;
+ if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16)))
+ return 0;
+
+ if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) +
+ sizeof(__be16))))
+ return -ENOMEM;
qp = (struct qtag_prefix *) skb->data;
- key->dl_tci = qp->tci | htons(VLAN_TAG_PRESENT);
+ key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT);
__skb_pull(skb, sizeof(struct qtag_prefix));
+
+ return 0;
}
static __be16 parse_ethertype(struct sk_buff *skb)
proto = *(__be16 *) skb->data;
__skb_pull(skb, sizeof(__be16));
- if (ntohs(proto) >= 1536)
+ if (ntohs(proto) >= ETH_P_802_3_MIN)
return proto;
- if (unlikely(skb->len < sizeof(struct llc_snap_hdr)))
+ if (skb->len < sizeof(struct llc_snap_hdr))
return htons(ETH_P_802_2);
+ if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr))))
+ return htons(0);
+
llc = (struct llc_snap_hdr *) skb->data;
if (llc->dsap != LLC_SAP_SNAP ||
llc->ssap != LLC_SAP_SNAP ||
return htons(ETH_P_802_2);
__skb_pull(skb, sizeof(struct llc_snap_hdr));
- return llc->ethertype;
+
+ if (ntohs(llc->ethertype) >= ETH_P_802_3_MIN)
+ return llc->ethertype;
+
+ return htons(ETH_P_802_2);
}
static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key,
- int nh_len)
+ int nh_len)
{
- struct ipv6hdr *nh = ipv6_hdr(skb);
- int icmp_len = ntohs(nh->payload_len) + sizeof(*nh) - nh_len;
struct icmp6hdr *icmp = icmp6_hdr(skb);
/* The ICMPv6 type and code fields use the 16-bit transport port
- * fields, so we need to store them in 16-bit network byte order. */
- key->tp_src = htons(icmp->icmp6_type);
- key->tp_dst = htons(icmp->icmp6_code);
+ * fields, so we need to store them in 16-bit network byte order.
+ */
+ key->tp.src = htons(icmp->icmp6_type);
+ key->tp.dst = htons(icmp->icmp6_code);
- if (!icmp->icmp6_code
- && ((icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION)
- || (icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT))) {
+ if (icmp->icmp6_code == 0 &&
+ (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION ||
+ icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) {
+ int icmp_len = skb->len - skb_transport_offset(skb);
struct nd_msg *nd;
int offset;
/* In order to process neighbor discovery options, we need the
- * entire packet. */
- if (icmp_len < sizeof(*nd))
- goto invalid;
- if (!pskb_may_pull(skb, skb_transport_offset(skb) + icmp_len))
+ * entire packet.
+ */
+ if (unlikely(icmp_len < sizeof(*nd)))
+ return 0;
+
+ if (unlikely(skb_linearize(skb)))
return -ENOMEM;
nd = (struct nd_msg *)skb_transport_header(skb);
- memcpy(key->nd_target, &nd->target, sizeof(key->nd_target));
+ key->ipv6.nd.target = nd->target;
icmp_len -= sizeof(*nd);
offset = 0;
while (icmp_len >= 8) {
- struct nd_opt_hdr *nd_opt = (struct nd_opt_hdr *)(nd->opt + offset);
+ struct nd_opt_hdr *nd_opt =
+ (struct nd_opt_hdr *)(nd->opt + offset);
int opt_len = nd_opt->nd_opt_len * 8;
- if (!opt_len || (opt_len > icmp_len))
- goto invalid;
+ if (unlikely(!opt_len || opt_len > icmp_len))
+ return 0;
- /* Store the link layer address if the appropriate option is
- * provided. It is considered an error if the same link
- * layer option is specified twice. */
+ /* Store the link layer address if the appropriate
+ * option is provided. It is considered an error if
+ * the same link layer option is specified twice.
+ */
if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR
- && opt_len == 8) {
- if (!is_zero_ether_addr(key->arp_sha))
+ && opt_len == 8) {
+ if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll)))
goto invalid;
- memcpy(key->arp_sha,
- &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN);
+ ether_addr_copy(key->ipv6.nd.sll,
+ &nd->opt[offset+sizeof(*nd_opt)]);
} else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR
- && opt_len == 8) {
- if (!is_zero_ether_addr(key->arp_tha))
+ && opt_len == 8) {
+ if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll)))
goto invalid;
- memcpy(key->arp_tha,
- &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN);
+ ether_addr_copy(key->ipv6.nd.tll,
+ &nd->opt[offset+sizeof(*nd_opt)]);
}
icmp_len -= opt_len;
return 0;
invalid:
- memset(key->nd_target, 0, sizeof(key->nd_target));
- memset(key->arp_sha, 0, sizeof(key->arp_sha));
- memset(key->arp_tha, 0, sizeof(key->arp_tha));
+ memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target));
+ memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll));
+ memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll));
return 0;
}
/**
- * flow_extract - extracts a flow key from an Ethernet frame.
+ * ovs_flow_extract - extracts a flow key from an Ethernet frame.
* @skb: sk_buff that contains the frame, with skb->data pointing to the
* Ethernet header
* @in_port: port number on which @skb was received.
* @key: output flow key
- * @is_frag: set to 1 if @skb contains an IPv4 fragment, or to 0 if @skb does
- * not contain an IPv4 packet or if it is not a fragment.
*
* The caller must ensure that skb->len >= ETH_HLEN.
*
* - skb->network_header: just past the Ethernet header, or just past the
* VLAN header, to the first byte of the Ethernet payload.
*
- * - skb->transport_header: If key->dl_type is ETH_P_IP or ETH_P_IPV6
+ * - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6
* on output, then just past the IP header, if one is present and
* of a correct length, otherwise the same as skb->network_header.
- * For other key->dl_type values it is left untouched.
+ * For other key->eth.type values it is left untouched.
*/
-int flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key,
- bool *is_frag)
+int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key)
{
+ int error;
struct ethhdr *eth;
memset(key, 0, sizeof(*key));
- key->tun_id = OVS_CB(skb)->tun_id;
- key->in_port = in_port;
- *is_frag = false;
-
- /*
- * We would really like to pull as many bytes as we could possibly
- * want to parse into the linear data area. Currently, for IPv4,
- * that is:
- *
- * 14 Ethernet header
- * 4 VLAN header
- * 60 max IP header with options
- * 20 max TCP/UDP/ICMP header (don't care about options)
- * --
- * 98
- *
- * But Xen only allocates 64 or 72 bytes for the linear data area in
- * netback, which means that we would reallocate and copy the skb's
- * linear data on every packet if we did that. So instead just pull 64
- * bytes, which is always sufficient without IP options, and then check
- * whether we need to pull more later when we look at the IP header.
- */
- if (!pskb_may_pull(skb, min(skb->len, 64u)))
- return -ENOMEM;
+
+ key->phy.priority = skb->priority;
+ if (OVS_CB(skb)->tun_key)
+ memcpy(&key->tun_key, OVS_CB(skb)->tun_key, sizeof(key->tun_key));
+ key->phy.in_port = in_port;
+ key->phy.skb_mark = skb->mark;
skb_reset_mac_header(skb);
- /* Link layer. */
+ /* Link layer. We are guaranteed to have at least the 14 byte Ethernet
+ * header in the linear data area.
+ */
eth = eth_hdr(skb);
- memcpy(key->dl_src, eth->h_source, ETH_ALEN);
- memcpy(key->dl_dst, eth->h_dest, ETH_ALEN);
+ ether_addr_copy(key->eth.src, eth->h_source);
+ ether_addr_copy(key->eth.dst, eth->h_dest);
- /* dl_type, dl_vlan, dl_vlan_pcp. */
__skb_pull(skb, 2 * ETH_ALEN);
- if (eth->h_proto == htons(ETH_P_8021Q))
- parse_vlan(skb, key);
- key->dl_type = parse_ethertype(skb);
+ /* We are going to push all headers that we pull, so no need to
+ * update skb->csum here. */
+
+ if (vlan_tx_tag_present(skb))
+ key->eth.tci = htons(vlan_get_tci(skb));
+ else if (eth->h_proto == htons(ETH_P_8021Q))
+ if (unlikely(parse_vlan(skb, key)))
+ return -ENOMEM;
+
+ key->eth.type = parse_ethertype(skb);
+ if (unlikely(key->eth.type == htons(0)))
+ return -ENOMEM;
+
skb_reset_network_header(skb);
- __skb_push(skb, skb->data - (unsigned char *)eth);
+ __skb_push(skb, skb->data - skb_mac_header(skb));
/* Network layer. */
- if (key->dl_type == htons(ETH_P_IP)) {
+ if (key->eth.type == htons(ETH_P_IP)) {
struct iphdr *nh;
- int error;
+ __be16 offset;
error = check_iphdr(skb);
if (unlikely(error)) {
if (error == -EINVAL) {
skb->transport_header = skb->network_header;
- return 0;
+ error = 0;
}
return error;
}
nh = ip_hdr(skb);
- key->ipv4_src = nh->saddr;
- key->ipv4_dst = nh->daddr;
- key->nw_tos = nh->tos & ~INET_ECN_MASK;
- key->nw_proto = nh->protocol;
+ key->ipv4.addr.src = nh->saddr;
+ key->ipv4.addr.dst = nh->daddr;
+
+ key->ip.proto = nh->protocol;
+ key->ip.tos = nh->tos;
+ key->ip.ttl = nh->ttl;
+
+ offset = nh->frag_off & htons(IP_OFFSET);
+ if (offset) {
+ key->ip.frag = OVS_FRAG_TYPE_LATER;
+ return 0;
+ }
+ if (nh->frag_off & htons(IP_MF) ||
+ skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
+ key->ip.frag = OVS_FRAG_TYPE_FIRST;
/* Transport layer. */
- if (!(nh->frag_off & htons(IP_MF | IP_OFFSET)) &&
- !(skb_shinfo(skb)->gso_type & SKB_GSO_UDP)) {
- if (key->nw_proto == IPPROTO_TCP) {
- if (tcphdr_ok(skb)) {
- struct tcphdr *tcp = tcp_hdr(skb);
- key->tp_src = tcp->source;
- key->tp_dst = tcp->dest;
- }
- } else if (key->nw_proto == IPPROTO_UDP) {
- if (udphdr_ok(skb)) {
- struct udphdr *udp = udp_hdr(skb);
- key->tp_src = udp->source;
- key->tp_dst = udp->dest;
- }
- } else if (key->nw_proto == IPPROTO_ICMP) {
- if (icmphdr_ok(skb)) {
- struct icmphdr *icmp = icmp_hdr(skb);
- /* The ICMP type and code fields use the 16-bit
- * transport port fields, so we need to store them
- * in 16-bit network byte order. */
- key->tp_src = htons(icmp->type);
- key->tp_dst = htons(icmp->code);
- }
+ if (key->ip.proto == IPPROTO_TCP) {
+ if (tcphdr_ok(skb)) {
+ struct tcphdr *tcp = tcp_hdr(skb);
+ key->tp.src = tcp->source;
+ key->tp.dst = tcp->dest;
+ key->tp.flags = TCP_FLAGS_BE16(tcp);
+ }
+ } else if (key->ip.proto == IPPROTO_UDP) {
+ if (udphdr_ok(skb)) {
+ struct udphdr *udp = udp_hdr(skb);
+ key->tp.src = udp->source;
+ key->tp.dst = udp->dest;
+ }
+ } else if (key->ip.proto == IPPROTO_SCTP) {
+ if (sctphdr_ok(skb)) {
+ struct sctphdr *sctp = sctp_hdr(skb);
+ key->tp.src = sctp->source;
+ key->tp.dst = sctp->dest;
+ }
+ } else if (key->ip.proto == IPPROTO_ICMP) {
+ if (icmphdr_ok(skb)) {
+ struct icmphdr *icmp = icmp_hdr(skb);
+ /* The ICMP type and code fields use the 16-bit
+ * transport port fields, so we need to store
+ * them in 16-bit network byte order. */
+ key->tp.src = htons(icmp->type);
+ key->tp.dst = htons(icmp->code);
}
- } else
- *is_frag = true;
+ }
- } else if (key->dl_type == htons(ETH_P_ARP) && arphdr_ok(skb)) {
+ } else if ((key->eth.type == htons(ETH_P_ARP) ||
+ key->eth.type == htons(ETH_P_RARP)) && arphdr_ok(skb)) {
struct arp_eth_header *arp;
arp = (struct arp_eth_header *)skb_network_header(skb);
/* We only match on the lower 8 bits of the opcode. */
if (ntohs(arp->ar_op) <= 0xff)
- key->nw_proto = ntohs(arp->ar_op);
-
- if (key->nw_proto == ARPOP_REQUEST
- || key->nw_proto == ARPOP_REPLY) {
- memcpy(&key->ipv4_src, arp->ar_sip, sizeof(key->ipv4_src));
- memcpy(&key->ipv4_dst, arp->ar_tip, sizeof(key->ipv4_dst));
- memcpy(key->arp_sha, arp->ar_sha, ETH_ALEN);
- memcpy(key->arp_tha, arp->ar_tha, ETH_ALEN);
- }
+ key->ip.proto = ntohs(arp->ar_op);
+ memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src));
+ memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst));
+ ether_addr_copy(key->ipv4.arp.sha, arp->ar_sha);
+ ether_addr_copy(key->ipv4.arp.tha, arp->ar_tha);
}
- } else if (key->dl_type == htons(ETH_P_IPV6)) {
+ } else if (key->eth.type == htons(ETH_P_IPV6)) {
int nh_len; /* IPv6 Header + Extensions */
nh_len = parse_ipv6hdr(skb, key);
if (unlikely(nh_len < 0)) {
if (nh_len == -EINVAL) {
skb->transport_header = skb->network_header;
- return 0;
+ error = 0;
+ } else {
+ error = nh_len;
}
- return nh_len;
+ return error;
}
+ if (key->ip.frag == OVS_FRAG_TYPE_LATER)
+ return 0;
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
+ key->ip.frag = OVS_FRAG_TYPE_FIRST;
+
/* Transport layer. */
- if (key->nw_proto == NEXTHDR_TCP) {
+ if (key->ip.proto == NEXTHDR_TCP) {
if (tcphdr_ok(skb)) {
struct tcphdr *tcp = tcp_hdr(skb);
- key->tp_src = tcp->source;
- key->tp_dst = tcp->dest;
+ key->tp.src = tcp->source;
+ key->tp.dst = tcp->dest;
+ key->tp.flags = TCP_FLAGS_BE16(tcp);
}
- } else if (key->nw_proto == NEXTHDR_UDP) {
+ } else if (key->ip.proto == NEXTHDR_UDP) {
if (udphdr_ok(skb)) {
struct udphdr *udp = udp_hdr(skb);
- key->tp_src = udp->source;
- key->tp_dst = udp->dest;
+ key->tp.src = udp->source;
+ key->tp.dst = udp->dest;
+ }
+ } else if (key->ip.proto == NEXTHDR_SCTP) {
+ if (sctphdr_ok(skb)) {
+ struct sctphdr *sctp = sctp_hdr(skb);
+ key->tp.src = sctp->source;
+ key->tp.dst = sctp->dest;
}
- } else if (key->nw_proto == NEXTHDR_ICMP) {
+ } else if (key->ip.proto == NEXTHDR_ICMP) {
if (icmp6hdr_ok(skb)) {
- int error = parse_icmpv6(skb, key, nh_len);
- if (error < 0)
+ error = parse_icmpv6(skb, key, nh_len);
+ if (error)
return error;
}
}
}
- return 0;
-}
-
-u32 flow_hash(const struct sw_flow_key *key)
-{
- return jhash2((u32*)key, sizeof(*key) / sizeof(u32), hash_seed);
-}
-
-int flow_cmp(const struct tbl_node *node, void *key2_)
-{
- const struct sw_flow_key *key1 = &flow_cast(node)->key;
- const struct sw_flow_key *key2 = key2_;
-
- return !memcmp(key1, key2, sizeof(struct sw_flow_key));
-}
-
-/**
- * flow_from_nlattrs - parses Netlink attributes into a flow key.
- * @swkey: receives the extracted flow key.
- * @key: Netlink attribute holding nested %ODP_KEY_ATTR_* Netlink attribute
- * sequence.
- *
- * This state machine accepts the following forms, with [] for optional
- * elements and | for alternatives:
- *
- * [tun_id] in_port ethernet [8021q] [ethertype \
- * [IPv4 [TCP|UDP|ICMP] | IPv6 [TCP|UDP|ICMPv6 [ND]] | ARP]]
- */
-int flow_from_nlattrs(struct sw_flow_key *swkey, const struct nlattr *attr)
-{
- const struct nlattr *nla;
- u16 prev_type;
- int rem;
-
- memset(swkey, 0, sizeof(*swkey));
- swkey->dl_type = htons(ETH_P_802_2);
-
- prev_type = ODP_KEY_ATTR_UNSPEC;
- nla_for_each_nested(nla, attr, rem) {
- static const u32 key_lens[ODP_KEY_ATTR_MAX + 1] = {
- [ODP_KEY_ATTR_TUN_ID] = 8,
- [ODP_KEY_ATTR_IN_PORT] = 4,
- [ODP_KEY_ATTR_ETHERNET] = sizeof(struct odp_key_ethernet),
- [ODP_KEY_ATTR_8021Q] = sizeof(struct odp_key_8021q),
- [ODP_KEY_ATTR_ETHERTYPE] = 2,
- [ODP_KEY_ATTR_IPV4] = sizeof(struct odp_key_ipv4),
- [ODP_KEY_ATTR_IPV6] = sizeof(struct odp_key_ipv6),
- [ODP_KEY_ATTR_TCP] = sizeof(struct odp_key_tcp),
- [ODP_KEY_ATTR_UDP] = sizeof(struct odp_key_udp),
- [ODP_KEY_ATTR_ICMP] = sizeof(struct odp_key_icmp),
- [ODP_KEY_ATTR_ICMPV6] = sizeof(struct odp_key_icmpv6),
- [ODP_KEY_ATTR_ARP] = sizeof(struct odp_key_arp),
- [ODP_KEY_ATTR_ND] = sizeof(struct odp_key_nd),
- };
-
- const struct odp_key_ethernet *eth_key;
- const struct odp_key_8021q *q_key;
- const struct odp_key_ipv4 *ipv4_key;
- const struct odp_key_ipv6 *ipv6_key;
- const struct odp_key_tcp *tcp_key;
- const struct odp_key_udp *udp_key;
- const struct odp_key_icmp *icmp_key;
- const struct odp_key_icmpv6 *icmpv6_key;
- const struct odp_key_arp *arp_key;
- const struct odp_key_nd *nd_key;
-
- int type = nla_type(nla);
-
- if (type > ODP_KEY_ATTR_MAX || nla_len(nla) != key_lens[type])
- return -EINVAL;
-
-#define TRANSITION(PREV_TYPE, TYPE) (((PREV_TYPE) << 16) | (TYPE))
- switch (TRANSITION(prev_type, type)) {
- case TRANSITION(ODP_KEY_ATTR_UNSPEC, ODP_KEY_ATTR_TUN_ID):
- swkey->tun_id = nla_get_be64(nla);
- break;
-
- case TRANSITION(ODP_KEY_ATTR_UNSPEC, ODP_KEY_ATTR_IN_PORT):
- case TRANSITION(ODP_KEY_ATTR_TUN_ID, ODP_KEY_ATTR_IN_PORT):
- if (nla_get_u32(nla) >= DP_MAX_PORTS)
- return -EINVAL;
- swkey->in_port = nla_get_u32(nla);
- break;
-
- case TRANSITION(ODP_KEY_ATTR_IN_PORT, ODP_KEY_ATTR_ETHERNET):
- eth_key = nla_data(nla);
- memcpy(swkey->dl_src, eth_key->eth_src, ETH_ALEN);
- memcpy(swkey->dl_dst, eth_key->eth_dst, ETH_ALEN);
- break;
-
- case TRANSITION(ODP_KEY_ATTR_ETHERNET, ODP_KEY_ATTR_8021Q):
- q_key = nla_data(nla);
- /* Only standard 0x8100 VLANs currently supported. */
- if (q_key->q_tpid != htons(ETH_P_8021Q))
- return -EINVAL;
- if (q_key->q_tci & htons(VLAN_TAG_PRESENT))
- return -EINVAL;
- swkey->dl_tci = q_key->q_tci | htons(VLAN_TAG_PRESENT);
- break;
-
- case TRANSITION(ODP_KEY_ATTR_8021Q, ODP_KEY_ATTR_ETHERTYPE):
- case TRANSITION(ODP_KEY_ATTR_ETHERNET, ODP_KEY_ATTR_ETHERTYPE):
- swkey->dl_type = nla_get_be16(nla);
- if (ntohs(swkey->dl_type) < 1536)
- return -EINVAL;
- break;
-
- case TRANSITION(ODP_KEY_ATTR_ETHERTYPE, ODP_KEY_ATTR_IPV4):
- if (swkey->dl_type != htons(ETH_P_IP))
- return -EINVAL;
- ipv4_key = nla_data(nla);
- swkey->ipv4_src = ipv4_key->ipv4_src;
- swkey->ipv4_dst = ipv4_key->ipv4_dst;
- swkey->nw_proto = ipv4_key->ipv4_proto;
- swkey->nw_tos = ipv4_key->ipv4_tos;
- if (swkey->nw_tos & INET_ECN_MASK)
- return -EINVAL;
- break;
-
- case TRANSITION(ODP_KEY_ATTR_ETHERTYPE, ODP_KEY_ATTR_IPV6):
- if (swkey->dl_type != htons(ETH_P_IPV6))
- return -EINVAL;
- ipv6_key = nla_data(nla);
- memcpy(swkey->ipv6_src, ipv6_key->ipv6_src,
- sizeof(swkey->ipv6_src));
- memcpy(swkey->ipv6_dst, ipv6_key->ipv6_dst,
- sizeof(swkey->ipv6_dst));
- swkey->nw_proto = ipv6_key->ipv6_proto;
- swkey->nw_tos = ipv6_key->ipv6_tos;
- if (swkey->nw_tos & INET_ECN_MASK)
- return -EINVAL;
- break;
-
- case TRANSITION(ODP_KEY_ATTR_IPV4, ODP_KEY_ATTR_TCP):
- case TRANSITION(ODP_KEY_ATTR_IPV6, ODP_KEY_ATTR_TCP):
- if (swkey->nw_proto != IPPROTO_TCP)
- return -EINVAL;
- tcp_key = nla_data(nla);
- swkey->tp_src = tcp_key->tcp_src;
- swkey->tp_dst = tcp_key->tcp_dst;
- break;
-
- case TRANSITION(ODP_KEY_ATTR_IPV4, ODP_KEY_ATTR_UDP):
- case TRANSITION(ODP_KEY_ATTR_IPV6, ODP_KEY_ATTR_UDP):
- if (swkey->nw_proto != IPPROTO_UDP)
- return -EINVAL;
- udp_key = nla_data(nla);
- swkey->tp_src = udp_key->udp_src;
- swkey->tp_dst = udp_key->udp_dst;
- break;
-
- case TRANSITION(ODP_KEY_ATTR_IPV4, ODP_KEY_ATTR_ICMP):
- if (swkey->nw_proto != IPPROTO_ICMP)
- return -EINVAL;
- icmp_key = nla_data(nla);
- swkey->tp_src = htons(icmp_key->icmp_type);
- swkey->tp_dst = htons(icmp_key->icmp_code);
- break;
-
- case TRANSITION(ODP_KEY_ATTR_IPV6, ODP_KEY_ATTR_ICMPV6):
- if (swkey->nw_proto != IPPROTO_ICMPV6)
- return -EINVAL;
- icmpv6_key = nla_data(nla);
- swkey->tp_src = htons(icmpv6_key->icmpv6_type);
- swkey->tp_dst = htons(icmpv6_key->icmpv6_code);
- break;
-
- case TRANSITION(ODP_KEY_ATTR_ETHERTYPE, ODP_KEY_ATTR_ARP):
- if (swkey->dl_type != htons(ETH_P_ARP))
- return -EINVAL;
- arp_key = nla_data(nla);
- swkey->ipv4_src = arp_key->arp_sip;
- swkey->ipv4_dst = arp_key->arp_tip;
- if (arp_key->arp_op & htons(0xff00))
- return -EINVAL;
- swkey->nw_proto = ntohs(arp_key->arp_op);
- memcpy(swkey->arp_sha, arp_key->arp_sha, ETH_ALEN);
- memcpy(swkey->arp_tha, arp_key->arp_tha, ETH_ALEN);
- break;
-
- case TRANSITION(ODP_KEY_ATTR_ICMPV6, ODP_KEY_ATTR_ND):
- if (swkey->tp_src != htons(NDISC_NEIGHBOUR_SOLICITATION)
- && swkey->tp_src != htons(NDISC_NEIGHBOUR_ADVERTISEMENT))
- return -EINVAL;
- nd_key = nla_data(nla);
- memcpy(swkey->nd_target, nd_key->nd_target,
- sizeof(swkey->nd_target));
- memcpy(swkey->arp_sha, nd_key->nd_sll, ETH_ALEN);
- memcpy(swkey->arp_tha, nd_key->nd_tll, ETH_ALEN);
- break;
-
- default:
- return -EINVAL;
- }
-
- prev_type = type;
- }
- if (rem)
- return -EINVAL;
-
- switch (prev_type) {
- case ODP_KEY_ATTR_UNSPEC:
- return -EINVAL;
-
- case ODP_KEY_ATTR_TUN_ID:
- case ODP_KEY_ATTR_IN_PORT:
- return -EINVAL;
-
- case ODP_KEY_ATTR_ETHERNET:
- case ODP_KEY_ATTR_8021Q:
- return 0;
-
- case ODP_KEY_ATTR_ETHERTYPE:
- if (swkey->dl_type == htons(ETH_P_IP) ||
- swkey->dl_type == htons(ETH_P_ARP))
- return -EINVAL;
- return 0;
-
- case ODP_KEY_ATTR_IPV4:
- if (swkey->nw_proto == IPPROTO_TCP ||
- swkey->nw_proto == IPPROTO_UDP ||
- swkey->nw_proto == IPPROTO_ICMP)
- return -EINVAL;
- return 0;
-
- case ODP_KEY_ATTR_IPV6:
- if (swkey->nw_proto == IPPROTO_TCP ||
- swkey->nw_proto == IPPROTO_UDP ||
- swkey->nw_proto == IPPROTO_ICMPV6)
- return -EINVAL;
- return 0;
-
- case ODP_KEY_ATTR_ICMPV6:
- if (swkey->tp_src == htons(NDISC_NEIGHBOUR_SOLICITATION) ||
- swkey->tp_src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT))
- return -EINVAL;
- return 0;
-
- case ODP_KEY_ATTR_TCP:
- case ODP_KEY_ATTR_UDP:
- case ODP_KEY_ATTR_ICMP:
- case ODP_KEY_ATTR_ARP:
- case ODP_KEY_ATTR_ND:
- return 0;
- }
-
- WARN_ON_ONCE(1);
- return -EINVAL;
-}
-
-int flow_to_nlattrs(const struct sw_flow_key *swkey, struct sk_buff *skb)
-{
- struct odp_key_ethernet *eth_key;
- struct nlattr *nla;
-
- if (swkey->tun_id != cpu_to_be64(0))
- NLA_PUT_BE64(skb, ODP_KEY_ATTR_TUN_ID, swkey->tun_id);
-
- NLA_PUT_U32(skb, ODP_KEY_ATTR_IN_PORT, swkey->in_port);
-
- nla = nla_reserve(skb, ODP_KEY_ATTR_ETHERNET, sizeof(*eth_key));
- if (!nla)
- goto nla_put_failure;
- eth_key = nla_data(nla);
- memcpy(eth_key->eth_src, swkey->dl_src, ETH_ALEN);
- memcpy(eth_key->eth_dst, swkey->dl_dst, ETH_ALEN);
-
- if (swkey->dl_tci != htons(0)) {
- struct odp_key_8021q q_key;
-
- q_key.q_tpid = htons(ETH_P_8021Q);
- q_key.q_tci = swkey->dl_tci & ~htons(VLAN_TAG_PRESENT);
- NLA_PUT(skb, ODP_KEY_ATTR_8021Q, sizeof(q_key), &q_key);
- }
-
- if (swkey->dl_type == htons(ETH_P_802_2))
- return 0;
-
- NLA_PUT_BE16(skb, ODP_KEY_ATTR_ETHERTYPE, swkey->dl_type);
-
- if (swkey->dl_type == htons(ETH_P_IP)) {
- struct odp_key_ipv4 *ipv4_key;
-
- nla = nla_reserve(skb, ODP_KEY_ATTR_IPV4, sizeof(*ipv4_key));
- if (!nla)
- goto nla_put_failure;
- ipv4_key = nla_data(nla);
- memset(ipv4_key, 0, sizeof(struct odp_key_ipv4));
- ipv4_key->ipv4_src = swkey->ipv4_src;
- ipv4_key->ipv4_dst = swkey->ipv4_dst;
- ipv4_key->ipv4_proto = swkey->nw_proto;
- ipv4_key->ipv4_tos = swkey->nw_tos;
- } else if (swkey->dl_type == htons(ETH_P_IPV6)) {
- struct odp_key_ipv6 *ipv6_key;
-
- nla = nla_reserve(skb, ODP_KEY_ATTR_IPV6, sizeof(*ipv6_key));
- if (!nla)
- goto nla_put_failure;
- ipv6_key = nla_data(nla);
- memset(ipv6_key, 0, sizeof(struct odp_key_ipv6));
- memcpy(ipv6_key->ipv6_src, swkey->ipv6_src,
- sizeof(ipv6_key->ipv6_src));
- memcpy(ipv6_key->ipv6_dst, swkey->ipv6_dst,
- sizeof(ipv6_key->ipv6_dst));
- ipv6_key->ipv6_proto = swkey->nw_proto;
- ipv6_key->ipv6_tos = swkey->nw_tos;
- } else if (swkey->dl_type == htons(ETH_P_ARP)) {
- struct odp_key_arp *arp_key;
-
- nla = nla_reserve(skb, ODP_KEY_ATTR_ARP, sizeof(*arp_key));
- if (!nla)
- goto nla_put_failure;
- arp_key = nla_data(nla);
- memset(arp_key, 0, sizeof(struct odp_key_arp));
- arp_key->arp_sip = swkey->ipv4_src;
- arp_key->arp_tip = swkey->ipv4_dst;
- arp_key->arp_op = htons(swkey->nw_proto);
- memcpy(arp_key->arp_sha, swkey->arp_sha, ETH_ALEN);
- memcpy(arp_key->arp_tha, swkey->arp_tha, ETH_ALEN);
- }
-
- if (swkey->dl_type == htons(ETH_P_IP)
- || swkey->dl_type == htons(ETH_P_IPV6)) {
-
- if (swkey->nw_proto == IPPROTO_TCP) {
- struct odp_key_tcp *tcp_key;
-
- nla = nla_reserve(skb, ODP_KEY_ATTR_TCP, sizeof(*tcp_key));
- if (!nla)
- goto nla_put_failure;
- tcp_key = nla_data(nla);
- tcp_key->tcp_src = swkey->tp_src;
- tcp_key->tcp_dst = swkey->tp_dst;
- } else if (swkey->nw_proto == IPPROTO_UDP) {
- struct odp_key_udp *udp_key;
-
- nla = nla_reserve(skb, ODP_KEY_ATTR_UDP, sizeof(*udp_key));
- if (!nla)
- goto nla_put_failure;
- udp_key = nla_data(nla);
- udp_key->udp_src = swkey->tp_src;
- udp_key->udp_dst = swkey->tp_dst;
- } else if (swkey->dl_type == htons(ETH_P_IP)
- && swkey->nw_proto == IPPROTO_ICMP) {
- struct odp_key_icmp *icmp_key;
-
- nla = nla_reserve(skb, ODP_KEY_ATTR_ICMP, sizeof(*icmp_key));
- if (!nla)
- goto nla_put_failure;
- icmp_key = nla_data(nla);
- icmp_key->icmp_type = ntohs(swkey->tp_src);
- icmp_key->icmp_code = ntohs(swkey->tp_dst);
- } else if (swkey->dl_type == htons(ETH_P_IPV6)
- && swkey->nw_proto == IPPROTO_ICMPV6) {
- struct odp_key_icmpv6 *icmpv6_key;
-
- nla = nla_reserve(skb, ODP_KEY_ATTR_ICMPV6, sizeof(*icmpv6_key));
- if (!nla)
- goto nla_put_failure;
- icmpv6_key = nla_data(nla);
- icmpv6_key->icmpv6_type = ntohs(swkey->tp_src);
- icmpv6_key->icmpv6_code = ntohs(swkey->tp_dst);
-
- if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION
- || icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
- struct odp_key_nd *nd_key;
-
- nla = nla_reserve(skb, ODP_KEY_ATTR_ND, sizeof(*nd_key));
- if (!nla)
- goto nla_put_failure;
- nd_key = nla_data(nla);
- memcpy(nd_key->nd_target, swkey->nd_target,
- sizeof(nd_key->nd_target));
- memcpy(nd_key->nd_sll, swkey->arp_sha, ETH_ALEN);
- memcpy(nd_key->nd_tll, swkey->arp_tha, ETH_ALEN);
- }
- }
- }
return 0;
-
-nla_put_failure:
- return -EMSGSIZE;
-}
-
-/* Initializes the flow module.
- * Returns zero if successful or a negative error code. */
-int flow_init(void)
-{
- flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow), 0,
- 0, NULL);
- if (flow_cache == NULL)
- return -ENOMEM;
-
- get_random_bytes(&hash_seed, sizeof(hash_seed));
-
- return 0;
-}
-
-/* Uninitializes the flow module. */
-void flow_exit(void)
-{
- kmem_cache_destroy(flow_cache);
}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff