/*
- * 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 <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 <linux/rculist.h>
-#include <net/inet_ecn.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/ndisc.h>
#include "vlan.h"
-static struct kmem_cache *flow_cache;
-static unsigned int hash_seed __read_mostly;
+u64 ovs_flow_used_time(unsigned long flow_jiffies)
+{
+ 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;
+}
+
+#define TCP_FLAGS_BE16(tp) (*(__be16 *)&tcp_flag_word(tp) & htons(0x0FFF))
+
+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;
+ }
+ }
+
+ stats->used = jiffies;
+ stats->packet_count++;
+ stats->byte_count += skb->len;
+ stats->tcp_flags |= tcp_flags;
+unlock:
+ spin_unlock(&stats->lock);
+}
+
+/* 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 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);
+ }
+ }
+}
+
+/* Called with ovs_mutex. */
+void ovs_flow_stats_clear(struct sw_flow *flow)
+{
+ 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 int check_header(struct sk_buff *skb, int len)
{
sizeof(struct udphdr));
}
-static bool icmphdr_ok(struct sk_buff *skb)
+static bool sctphdr_ok(struct sk_buff *skb)
{
return pskb_may_pull(skb, skb_transport_offset(skb) +
- sizeof(struct icmphdr));
-}
-
-u64 flow_used_time(unsigned long flow_jiffies)
-{
- 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;
+ sizeof(struct sctphdr));
}
-#define SW_FLOW_KEY_OFFSET(field) \
- (offsetof(struct sw_flow_key, field) + \
- FIELD_SIZEOF(struct sw_flow_key, field))
-
-/**
- * skip_exthdr - skip any IPv6 extension headers
- * @skb: skbuff to parse
- * @start: offset of first extension header
- * @nexthdrp: Initially, points to the type of the extension header at @start.
- * This function updates it to point to the extension header at the final
- * offset.
- * @tos_frag: Points to the @tos_frag member in a &struct sw_flow_key. This
- * function sets an appropriate %OVS_FRAG_TYPE_* value.
- *
- * This is based on ipv6_skip_exthdr() but adds the updates to *@tos_frag.
- *
- * When there is more than one fragment header, this version reports whether
- * the final fragment header that it examines is a first fragment.
- *
- * Returns the final payload offset, or -1 on error.
- */
-static int skip_exthdr(const struct sk_buff *skb, int start, u8 *nexthdrp,
- u8 *tos_frag)
+static bool icmphdr_ok(struct sk_buff *skb)
{
- u8 nexthdr = *nexthdrp;
-
- while (ipv6_ext_hdr(nexthdr)) {
- struct ipv6_opt_hdr _hdr, *hp;
- int hdrlen;
-
- if (nexthdr == NEXTHDR_NONE)
- return -1;
- hp = skb_header_pointer(skb, start, sizeof(_hdr), &_hdr);
- if (hp == NULL)
- return -1;
- if (nexthdr == NEXTHDR_FRAGMENT) {
- __be16 _frag_off, *fp;
- fp = skb_header_pointer(skb,
- start+offsetof(struct frag_hdr,
- frag_off),
- sizeof(_frag_off),
- &_frag_off);
- if (fp == NULL)
- return -1;
-
- *tos_frag &= ~OVS_FRAG_TYPE_MASK;
- if (ntohs(*fp) & ~0x7) {
- *tos_frag |= OVS_FRAG_TYPE_LATER;
- break;
- }
- *tos_frag |= OVS_FRAG_TYPE_FIRST;
- hdrlen = 8;
- } else if (nexthdr == NEXTHDR_AUTH)
- hdrlen = (hp->hdrlen+2)<<2;
- else
- hdrlen = ipv6_optlen(hp);
-
- nexthdr = hp->nexthdr;
- start += hdrlen;
- }
-
- *nexthdrp = nexthdr;
- return start;
+ return pskb_may_pull(skb, skb_transport_offset(skb) +
+ sizeof(struct icmphdr));
}
-static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key,
- int *key_lenp)
+static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
{
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;
- *key_lenp = SW_FLOW_KEY_OFFSET(ipv6.label);
-
err = check_header(skb, nh_ofs + sizeof(*nh));
if (unlikely(err))
return err;
payload_ofs = (u8 *)(nh + 1) - skb->data;
key->ip.proto = NEXTHDR_NONE;
- key->ip.tos_frag = ipv6_get_dsfield(nh) & ~INET_ECN_MASK;
+ key->ip.tos = ipv6_get_dsfield(nh);
+ key->ip.ttl = nh->hop_limit;
key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL);
- ipv6_addr_copy(&key->ipv6.addr.src, &nh->saddr);
- ipv6_addr_copy(&key->ipv6.addr.dst, &nh->daddr);
+ key->ipv6.addr.src = nh->saddr;
+ key->ipv6.addr.dst = nh->daddr;
- payload_ofs = skip_exthdr(skb, payload_ofs,
- &nexthdr, &key->ip.tos_frag);
+ payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off);
if (unlikely(payload_ofs < 0))
return -EINVAL;
+ if (frag_off) {
+ if (frag_off & htons(~0x7))
+ key->ip.frag = OVS_FRAG_TYPE_LATER;
+ else
+ key->ip.frag = OVS_FRAG_TYPE_FIRST;
+ }
+
nh_len = payload_ofs - nh_ofs;
skb_set_transport_header(skb, nh_ofs + nh_len);
key->ip.proto = nexthdr;
sizeof(struct icmp6hdr));
}
-#define TCP_FLAGS_OFFSET 13
-#define TCP_FLAG_MASK 0x3f
-
-void flow_used(struct sw_flow *flow, struct sk_buff *skb)
-{
- u8 tcp_flags = 0;
-
- if (flow->key.eth.type == htons(ETH_P_IP) &&
- flow->key.ip.proto == IPPROTO_TCP) {
- u8 *tcp = (u8 *)tcp_hdr(skb);
- tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK;
- }
-
- spin_lock(&flow->lock);
- flow->used = jiffies;
- flow->packet_count++;
- flow->byte_count += skb->len;
- flow->tcp_flags |= tcp_flags;
- spin_unlock(&flow->lock);
-}
-
-struct sw_flow_actions *flow_actions_alloc(const struct nlattr *actions)
-{
- 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;
-}
-
-struct sw_flow *flow_alloc(void)
-{
- 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->sf_acts = NULL;
- flow->dead = false;
-
- return flow;
-}
-
-static struct hlist_head __rcu *find_bucket(struct flow_table * table, u32 hash)
-{
- return flex_array_get(table->buckets,
- (hash & (table->n_buckets - 1)));
-}
-
-static struct flex_array __rcu *alloc_buckets(unsigned int n_buckets)
-{
- struct flex_array __rcu *buckets;
- int i, err;
-
- buckets = flex_array_alloc(sizeof(struct hlist_head *),
- n_buckets, GFP_KERNEL);
- if (!buckets)
- return NULL;
-
- err = flex_array_prealloc(buckets, 0, n_buckets, GFP_KERNEL);
- if (err) {
- flex_array_free(buckets);
- return NULL;
- }
-
- for (i = 0; i < n_buckets; i++)
- INIT_HLIST_HEAD((struct hlist_head *)
- flex_array_get(buckets, i));
-
- return buckets;
-}
-
-static void free_buckets(struct flex_array *buckets)
-{
- flex_array_free(buckets);
-}
-
-struct flow_table *flow_tbl_alloc(int new_size)
-{
- struct flow_table *table = kmalloc(sizeof(*table), GFP_KERNEL);
-
- if (!table)
- return NULL;
-
- table->buckets = alloc_buckets(new_size);
-
- if (!table->buckets) {
- kfree(table);
- return NULL;
- }
- table->n_buckets = new_size;
- table->count = 0;
-
- return table;
-}
-
-static void flow_free(struct sw_flow *flow)
-{
- flow->dead = true;
- flow_put(flow);
-}
-
-void flow_tbl_destroy(struct flow_table *table)
-{
- int i;
-
- if (!table)
- return;
-
- for (i = 0; i < table->n_buckets; i++) {
- struct sw_flow *flow;
- struct hlist_head *head = flex_array_get(table->buckets, i);
- struct hlist_node *node, *n;
-
- hlist_for_each_entry_safe(flow, node, n, head, hash_node) {
- hlist_del_init_rcu(&flow->hash_node);
- flow_free(flow);
- }
- }
-
- free_buckets(table->buckets);
- kfree(table);
-}
-
-static void flow_tbl_destroy_rcu_cb(struct rcu_head *rcu)
-{
- struct flow_table *table = container_of(rcu, struct flow_table, rcu);
-
- flow_tbl_destroy(table);
-}
-
-void flow_tbl_deferred_destroy(struct flow_table *table)
-{
- if (!table)
- return;
-
- call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb);
-}
-
-struct sw_flow *flow_tbl_next(struct flow_table *table, u32 *bucket, u32 *last)
-{
- struct sw_flow *flow;
- struct hlist_head *head;
- struct hlist_node *n;
- int i;
-
- while (*bucket < table->n_buckets) {
- i = 0;
- head = flex_array_get(table->buckets, *bucket);
- hlist_for_each_entry_rcu(flow, n, head, hash_node) {
- if (i < *last) {
- i++;
- continue;
- }
- *last = i + 1;
- return flow;
- }
- (*bucket)++;
- *last = 0;
- }
-
- return NULL;
-}
-
-struct flow_table *flow_tbl_expand(struct flow_table *table)
-{
- struct flow_table *new_table;
- int n_buckets = table->n_buckets * 2;
- int i;
-
- new_table = flow_tbl_alloc(n_buckets);
- if (!new_table)
- return ERR_PTR(-ENOMEM);
-
- for (i = 0; i < table->n_buckets; i++) {
- struct sw_flow *flow;
- struct hlist_head *head;
- struct hlist_node *n, *pos;
-
- head = flex_array_get(table->buckets, i);
-
- hlist_for_each_entry_safe(flow, n, pos, head, hash_node) {
- hlist_del_init_rcu(&flow->hash_node);
- flow_tbl_insert(new_table, flow);
- }
- }
-
- return new_table;
-}
-
-/* RCU callback used by flow_deferred_free. */
-static void rcu_free_flow_callback(struct rcu_head *rcu)
-{
- struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu);
-
- flow->dead = true;
- flow_put(flow);
-}
-
-/* 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);
-}
-
-void flow_hold(struct sw_flow *flow)
-{
- atomic_inc(&flow->refcnt);
-}
-
-void flow_put(struct sw_flow *flow)
-{
- if (unlikely(!flow))
- return;
-
- if (atomic_dec_and_test(&flow->refcnt)) {
- kfree((struct sf_flow_acts __force *)flow->sf_acts);
- kmem_cache_free(flow_cache, flow);
- }
-}
-
-/* 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);
-}
-
-/* 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)
-{
- call_rcu(&sf_acts->rcu, rcu_free_acts_callback);
-}
-
static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
{
struct qtag_prefix {
};
struct qtag_prefix *qp;
+ 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;
proto = *(__be16 *) skb->data;
__skb_pull(skb, sizeof(__be16));
- if (ntohs(proto) >= 1536)
+ if (ntohs(proto) >= ETH_P_802_3_MIN)
return proto;
if (skb->len < sizeof(struct llc_snap_hdr))
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 *key_lenp, int nh_len)
+ int nh_len)
{
struct icmp6hdr *icmp = icmp6_hdr(skb);
- int error = 0;
- int key_len;
/* 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->ipv6.tp.src = htons(icmp->icmp6_type);
- key->ipv6.tp.dst = htons(icmp->icmp6_code);
- key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
+ key->tp.src = htons(icmp->icmp6_type);
+ key->tp.dst = htons(icmp->icmp6_code);
if (icmp->icmp6_code == 0 &&
(icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION ||
struct nd_msg *nd;
int offset;
- key_len = SW_FLOW_KEY_OFFSET(ipv6.nd);
-
/* In order to process neighbor discovery options, we need the
* entire packet.
*/
if (unlikely(icmp_len < sizeof(*nd)))
- goto out;
- if (unlikely(skb_linearize(skb))) {
- error = -ENOMEM;
- goto out;
- }
+ return 0;
+
+ if (unlikely(skb_linearize(skb)))
+ return -ENOMEM;
nd = (struct nd_msg *)skb_transport_header(skb);
- ipv6_addr_copy(&key->ipv6.nd.target, &nd->target);
- key_len = SW_FLOW_KEY_OFFSET(ipv6.nd);
+ key->ipv6.nd.target = nd->target;
icmp_len -= sizeof(*nd);
offset = 0;
int opt_len = nd_opt->nd_opt_len * 8;
if (unlikely(!opt_len || opt_len > icmp_len))
- goto invalid;
+ return 0;
/* Store the link layer address if the appropriate
* option is provided. It is considered an error if
&& opt_len == 8) {
if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll)))
goto invalid;
- memcpy(key->ipv6.nd.sll,
- &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 (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll)))
goto invalid;
- memcpy(key->ipv6.nd.tll,
- &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;
}
}
- goto out;
+ return 0;
invalid:
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));
-out:
- *key_lenp = key_len;
- return error;
+ 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
- * @key_lenp: length of output flow key
*
* 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,
- int *key_lenp)
+int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key)
{
- int error = 0;
- int key_len = SW_FLOW_KEY_OFFSET(eth);
+ int error;
struct ethhdr *eth;
memset(key, 0, sizeof(*key));
key->phy.priority = skb->priority;
- key->phy.tun_id = OVS_CB(skb)->tun_id;
+ 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);
* header in the linear data area.
*/
eth = eth_hdr(skb);
- memcpy(key->eth.src, eth->h_source, ETH_ALEN);
- memcpy(key->eth.dst, eth->h_dest, ETH_ALEN);
+ ether_addr_copy(key->eth.src, eth->h_source);
+ ether_addr_copy(key->eth.dst, eth->h_dest);
__skb_pull(skb, 2 * ETH_ALEN);
+ /* 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));
struct iphdr *nh;
__be16 offset;
- key_len = SW_FLOW_KEY_OFFSET(ipv4.addr);
-
error = check_iphdr(skb);
if (unlikely(error)) {
if (error == -EINVAL) {
skb->transport_header = skb->network_header;
error = 0;
}
- goto out;
+ return error;
}
nh = ip_hdr(skb);
key->ipv4.addr.dst = nh->daddr;
key->ip.proto = nh->protocol;
- key->ip.tos_frag = nh->tos & ~INET_ECN_MASK;
+ key->ip.tos = nh->tos;
+ key->ip.ttl = nh->ttl;
offset = nh->frag_off & htons(IP_OFFSET);
if (offset) {
- key->ip.tos_frag |= OVS_FRAG_TYPE_LATER;
- goto out;
+ 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.tos_frag |= OVS_FRAG_TYPE_FIRST;
+ key->ip.frag = OVS_FRAG_TYPE_FIRST;
/* Transport layer. */
if (key->ip.proto == IPPROTO_TCP) {
- key_len = SW_FLOW_KEY_OFFSET(ipv4.tp);
if (tcphdr_ok(skb)) {
struct tcphdr *tcp = tcp_hdr(skb);
- key->ipv4.tp.src = tcp->source;
- key->ipv4.tp.dst = tcp->dest;
+ key->tp.src = tcp->source;
+ key->tp.dst = tcp->dest;
+ key->tp.flags = TCP_FLAGS_BE16(tcp);
}
} else if (key->ip.proto == IPPROTO_UDP) {
- key_len = SW_FLOW_KEY_OFFSET(ipv4.tp);
if (udphdr_ok(skb)) {
struct udphdr *udp = udp_hdr(skb);
- key->ipv4.tp.src = udp->source;
- key->ipv4.tp.dst = udp->dest;
+ 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) {
- key_len = SW_FLOW_KEY_OFFSET(ipv4.tp);
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->ipv4.tp.src = htons(icmp->type);
- key->ipv4.tp.dst = htons(icmp->code);
+ key->tp.src = htons(icmp->type);
+ key->tp.dst = htons(icmp->code);
}
}
- } else if (key->eth.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->ip.proto = ntohs(arp->ar_op);
-
- if (key->ip.proto == ARPOP_REQUEST
- || key->ip.proto == ARPOP_REPLY) {
- 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));
- memcpy(key->ipv4.arp.sha, arp->ar_sha, ETH_ALEN);
- memcpy(key->ipv4.arp.tha, arp->ar_tha, ETH_ALEN);
- key_len = SW_FLOW_KEY_OFFSET(ipv4.arp);
- }
+ 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->eth.type == htons(ETH_P_IPV6)) {
int nh_len; /* IPv6 Header + Extensions */
- nh_len = parse_ipv6hdr(skb, key, &key_len);
+ nh_len = parse_ipv6hdr(skb, key);
if (unlikely(nh_len < 0)) {
- if (nh_len == -EINVAL)
+ if (nh_len == -EINVAL) {
skb->transport_header = skb->network_header;
- else
+ error = 0;
+ } else {
error = nh_len;
- goto out;
+ }
+ return error;
}
- if ((key->ip.tos_frag & OVS_FRAG_TYPE_MASK) == OVS_FRAG_TYPE_LATER)
- goto out;
+ if (key->ip.frag == OVS_FRAG_TYPE_LATER)
+ return 0;
if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
- key->ip.tos_frag |= OVS_FRAG_TYPE_FIRST;
+ key->ip.frag = OVS_FRAG_TYPE_FIRST;
/* Transport layer. */
if (key->ip.proto == NEXTHDR_TCP) {
- key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
if (tcphdr_ok(skb)) {
struct tcphdr *tcp = tcp_hdr(skb);
- key->ipv6.tp.src = tcp->source;
- key->ipv6.tp.dst = tcp->dest;
+ key->tp.src = tcp->source;
+ key->tp.dst = tcp->dest;
+ key->tp.flags = TCP_FLAGS_BE16(tcp);
}
} else if (key->ip.proto == NEXTHDR_UDP) {
- key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
if (udphdr_ok(skb)) {
struct udphdr *udp = udp_hdr(skb);
- key->ipv6.tp.src = udp->source;
- key->ipv6.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->ip.proto == NEXTHDR_ICMP) {
- key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
if (icmp6hdr_ok(skb)) {
- error = parse_icmpv6(skb, key, &key_len, nh_len);
- if (error < 0)
- goto out;
- }
- }
- }
-
-out:
- *key_lenp = key_len;
- return error;
-}
-
-u32 flow_hash(const struct sw_flow_key *key, int key_len)
-{
- return jhash2((u32 *)key, DIV_ROUND_UP(key_len, sizeof(u32)), hash_seed);
-}
-
-struct sw_flow *flow_tbl_lookup(struct flow_table *table,
- struct sw_flow_key *key, int key_len)
-{
- struct sw_flow *flow;
- struct hlist_node *n;
- struct hlist_head *head;
- u32 hash;
-
- hash = flow_hash(key, key_len);
-
- head = find_bucket(table, hash);
- hlist_for_each_entry_rcu(flow, n, head, hash_node) {
-
- if (flow->hash == hash &&
- !memcmp(&flow->key, key, key_len)) {
- return flow;
- }
- }
- return NULL;
-}
-
-void flow_tbl_insert(struct flow_table *table, struct sw_flow *flow)
-{
- struct hlist_head *head;
-
- head = find_bucket(table, flow->hash);
- hlist_add_head_rcu(&flow->hash_node, head);
- table->count++;
-}
-
-void flow_tbl_remove(struct flow_table *table, struct sw_flow *flow)
-{
- if (!hlist_unhashed(&flow->hash_node)) {
- hlist_del_init_rcu(&flow->hash_node);
- table->count--;
- BUG_ON(table->count < 0);
- }
-}
-
-static int parse_tos_frag(struct sw_flow_key *swkey, u8 tos, u8 frag)
-{
- if (tos & INET_ECN_MASK || frag > OVS_FRAG_TYPE_MAX)
- return -EINVAL;
-
- swkey->ip.tos_frag = tos | frag;
- return 0;
-}
-
-/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
-const u32 ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
- [OVS_KEY_ATTR_PRIORITY] = 4,
- [OVS_KEY_ATTR_TUN_ID] = 8,
- [OVS_KEY_ATTR_IN_PORT] = 4,
- [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet),
- [OVS_KEY_ATTR_8021Q] = sizeof(struct ovs_key_8021q),
- [OVS_KEY_ATTR_ETHERTYPE] = 2,
- [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4),
- [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6),
- [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp),
- [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp),
- [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp),
- [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6),
- [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp),
- [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd),
-};
-
-/**
- * flow_from_nlattrs - parses Netlink attributes into a flow key.
- * @swkey: receives the extracted flow key.
- * @key_lenp: number of bytes used in @swkey.
- * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
- * sequence.
- *
- * This state machine accepts the following forms, with [] for optional
- * elements and | for alternatives:
- *
- * [priority] [tun_id] [in_port] ethernet [8021q] [ethertype \
- * [IPv4 [TCP|UDP|ICMP] | IPv6 [TCP|UDP|ICMPv6 [ND]] | ARP]]
- *
- * except that IPv4 or IPv6 terminates the sequence if its @ipv4_frag or
- * @ipv6_frag member, respectively, equals %OVS_FRAG_TYPE_LATER.
- */
-int flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
- const struct nlattr *attr)
-{
- int error = 0;
- enum ovs_frag_type frag_type;
- const struct nlattr *nla;
- u16 prev_type;
- int rem;
- int key_len;
-
- memset(swkey, 0, sizeof(*swkey));
- swkey->phy.in_port = USHRT_MAX;
- swkey->eth.type = htons(ETH_P_802_2);
- key_len = SW_FLOW_KEY_OFFSET(eth);
-
- prev_type = OVS_KEY_ATTR_UNSPEC;
- nla_for_each_nested(nla, attr, rem) {
- const struct ovs_key_ethernet *eth_key;
- const struct ovs_key_8021q *q_key;
- const struct ovs_key_ipv4 *ipv4_key;
- const struct ovs_key_ipv6 *ipv6_key;
- const struct ovs_key_tcp *tcp_key;
- const struct ovs_key_udp *udp_key;
- const struct ovs_key_icmp *icmp_key;
- const struct ovs_key_icmpv6 *icmpv6_key;
- const struct ovs_key_arp *arp_key;
- const struct ovs_key_nd *nd_key;
-
- int type = nla_type(nla);
-
- if (type > OVS_KEY_ATTR_MAX ||
- nla_len(nla) != ovs_key_lens[type])
- goto invalid;
-
-#define TRANSITION(PREV_TYPE, TYPE) (((PREV_TYPE) << 16) | (TYPE))
- switch (TRANSITION(prev_type, type)) {
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_PRIORITY):
- swkey->phy.priority = nla_get_u32(nla);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_TUN_ID):
- case TRANSITION(OVS_KEY_ATTR_PRIORITY, OVS_KEY_ATTR_TUN_ID):
- swkey->phy.tun_id = nla_get_be64(nla);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_IN_PORT):
- case TRANSITION(OVS_KEY_ATTR_PRIORITY, OVS_KEY_ATTR_IN_PORT):
- case TRANSITION(OVS_KEY_ATTR_TUN_ID, OVS_KEY_ATTR_IN_PORT):
- if (nla_get_u32(nla) >= DP_MAX_PORTS)
- goto invalid;
- swkey->phy.in_port = nla_get_u32(nla);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_ETHERNET):
- case TRANSITION(OVS_KEY_ATTR_PRIORITY, OVS_KEY_ATTR_ETHERNET):
- case TRANSITION(OVS_KEY_ATTR_TUN_ID, OVS_KEY_ATTR_ETHERNET):
- case TRANSITION(OVS_KEY_ATTR_IN_PORT, OVS_KEY_ATTR_ETHERNET):
- eth_key = nla_data(nla);
- memcpy(swkey->eth.src, eth_key->eth_src, ETH_ALEN);
- memcpy(swkey->eth.dst, eth_key->eth_dst, ETH_ALEN);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_ETHERNET, OVS_KEY_ATTR_8021Q):
- q_key = nla_data(nla);
- /* Only standard 0x8100 VLANs currently supported. */
- if (q_key->q_tpid != htons(ETH_P_8021Q))
- goto invalid;
- if (q_key->q_tci & htons(VLAN_TAG_PRESENT))
- goto invalid;
- swkey->eth.tci = q_key->q_tci | htons(VLAN_TAG_PRESENT);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_8021Q, OVS_KEY_ATTR_ETHERTYPE):
- case TRANSITION(OVS_KEY_ATTR_ETHERNET, OVS_KEY_ATTR_ETHERTYPE):
- swkey->eth.type = nla_get_be16(nla);
- if (ntohs(swkey->eth.type) < 1536)
- goto invalid;
- break;
-
- case TRANSITION(OVS_KEY_ATTR_ETHERTYPE, OVS_KEY_ATTR_IPV4):
- key_len = SW_FLOW_KEY_OFFSET(ipv4.addr);
- if (swkey->eth.type != htons(ETH_P_IP))
- goto invalid;
- ipv4_key = nla_data(nla);
- swkey->ip.proto = ipv4_key->ipv4_proto;
- if (parse_tos_frag(swkey, ipv4_key->ipv4_tos,
- ipv4_key->ipv4_frag))
- goto invalid;
- swkey->ipv4.addr.src = ipv4_key->ipv4_src;
- swkey->ipv4.addr.dst = ipv4_key->ipv4_dst;
- break;
-
- case TRANSITION(OVS_KEY_ATTR_ETHERTYPE, OVS_KEY_ATTR_IPV6):
- key_len = SW_FLOW_KEY_OFFSET(ipv6.label);
- if (swkey->eth.type != htons(ETH_P_IPV6))
- goto invalid;
- ipv6_key = nla_data(nla);
- swkey->ipv6.label = ipv6_key->ipv6_label;
- swkey->ip.proto = ipv6_key->ipv6_proto;
- if (parse_tos_frag(swkey, ipv6_key->ipv6_tos,
- ipv6_key->ipv6_frag))
- goto invalid;
- memcpy(&swkey->ipv6.addr.src, ipv6_key->ipv6_src,
- sizeof(swkey->ipv6.addr.src));
- memcpy(&swkey->ipv6.addr.dst, ipv6_key->ipv6_dst,
- sizeof(swkey->ipv6.addr.dst));
- break;
-
- case TRANSITION(OVS_KEY_ATTR_IPV4, OVS_KEY_ATTR_TCP):
- key_len = SW_FLOW_KEY_OFFSET(ipv4.tp);
- if (swkey->ip.proto != IPPROTO_TCP)
- goto invalid;
- tcp_key = nla_data(nla);
- swkey->ipv4.tp.src = tcp_key->tcp_src;
- swkey->ipv4.tp.dst = tcp_key->tcp_dst;
- break;
-
- case TRANSITION(OVS_KEY_ATTR_IPV6, OVS_KEY_ATTR_TCP):
- key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
- if (swkey->ip.proto != IPPROTO_TCP)
- goto invalid;
- tcp_key = nla_data(nla);
- swkey->ipv6.tp.src = tcp_key->tcp_src;
- swkey->ipv6.tp.dst = tcp_key->tcp_dst;
- break;
-
- case TRANSITION(OVS_KEY_ATTR_IPV4, OVS_KEY_ATTR_UDP):
- key_len = SW_FLOW_KEY_OFFSET(ipv4.tp);
- if (swkey->ip.proto != IPPROTO_UDP)
- goto invalid;
- udp_key = nla_data(nla);
- swkey->ipv4.tp.src = udp_key->udp_src;
- swkey->ipv4.tp.dst = udp_key->udp_dst;
- break;
-
- case TRANSITION(OVS_KEY_ATTR_IPV6, OVS_KEY_ATTR_UDP):
- key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
- if (swkey->ip.proto != IPPROTO_UDP)
- goto invalid;
- udp_key = nla_data(nla);
- swkey->ipv6.tp.src = udp_key->udp_src;
- swkey->ipv6.tp.dst = udp_key->udp_dst;
- break;
-
- case TRANSITION(OVS_KEY_ATTR_IPV4, OVS_KEY_ATTR_ICMP):
- key_len = SW_FLOW_KEY_OFFSET(ipv4.tp);
- if (swkey->ip.proto != IPPROTO_ICMP)
- goto invalid;
- icmp_key = nla_data(nla);
- swkey->ipv4.tp.src = htons(icmp_key->icmp_type);
- swkey->ipv4.tp.dst = htons(icmp_key->icmp_code);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_IPV6, OVS_KEY_ATTR_ICMPV6):
- key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
- if (swkey->ip.proto != IPPROTO_ICMPV6)
- goto invalid;
- icmpv6_key = nla_data(nla);
- swkey->ipv6.tp.src = htons(icmpv6_key->icmpv6_type);
- swkey->ipv6.tp.dst = htons(icmpv6_key->icmpv6_code);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_ETHERTYPE, OVS_KEY_ATTR_ARP):
- key_len = SW_FLOW_KEY_OFFSET(ipv4.arp);
- if (swkey->eth.type != htons(ETH_P_ARP))
- goto invalid;
- arp_key = nla_data(nla);
- swkey->ipv4.addr.src = arp_key->arp_sip;
- swkey->ipv4.addr.dst = arp_key->arp_tip;
- if (arp_key->arp_op & htons(0xff00))
- goto invalid;
- swkey->ip.proto = ntohs(arp_key->arp_op);
- memcpy(swkey->ipv4.arp.sha, arp_key->arp_sha, ETH_ALEN);
- memcpy(swkey->ipv4.arp.tha, arp_key->arp_tha, ETH_ALEN);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_ICMPV6, OVS_KEY_ATTR_ND):
- key_len = SW_FLOW_KEY_OFFSET(ipv6.nd);
- if (swkey->ipv6.tp.src != htons(NDISC_NEIGHBOUR_SOLICITATION)
- && swkey->ipv6.tp.src != htons(NDISC_NEIGHBOUR_ADVERTISEMENT))
- goto invalid;
- nd_key = nla_data(nla);
- memcpy(&swkey->ipv6.nd.target, nd_key->nd_target,
- sizeof(swkey->ipv6.nd.target));
- memcpy(swkey->ipv6.nd.sll, nd_key->nd_sll, ETH_ALEN);
- memcpy(swkey->ipv6.nd.tll, nd_key->nd_tll, ETH_ALEN);
- break;
-
- default:
- goto invalid;
- }
-
- prev_type = type;
- }
- if (rem)
- goto invalid;
-
- frag_type = swkey->ip.tos_frag & OVS_FRAG_TYPE_MASK;
- switch (prev_type) {
- case OVS_KEY_ATTR_UNSPEC:
- goto invalid;
-
- case OVS_KEY_ATTR_PRIORITY:
- case OVS_KEY_ATTR_TUN_ID:
- case OVS_KEY_ATTR_IN_PORT:
- goto invalid;
-
- case OVS_KEY_ATTR_ETHERNET:
- case OVS_KEY_ATTR_8021Q:
- goto ok;
-
- case OVS_KEY_ATTR_ETHERTYPE:
- if (swkey->eth.type == htons(ETH_P_IP) ||
- swkey->eth.type == htons(ETH_P_IPV6) ||
- swkey->eth.type == htons(ETH_P_ARP))
- goto invalid;
- goto ok;
-
- case OVS_KEY_ATTR_IPV4:
- if (frag_type == OVS_FRAG_TYPE_LATER)
- goto ok;
- if (swkey->ip.proto == IPPROTO_TCP ||
- swkey->ip.proto == IPPROTO_UDP ||
- swkey->ip.proto == IPPROTO_ICMP)
- goto invalid;
- goto ok;
-
- case OVS_KEY_ATTR_IPV6:
- if (frag_type == OVS_FRAG_TYPE_LATER)
- goto ok;
- if (swkey->ip.proto == IPPROTO_TCP ||
- swkey->ip.proto == IPPROTO_UDP ||
- swkey->ip.proto == IPPROTO_ICMPV6)
- goto invalid;
- goto ok;
-
- case OVS_KEY_ATTR_ICMPV6:
- if (swkey->ipv6.tp.src == htons(NDISC_NEIGHBOUR_SOLICITATION) ||
- swkey->ipv6.tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT) ||
- frag_type == OVS_FRAG_TYPE_LATER)
- goto invalid;
- goto ok;
-
- case OVS_KEY_ATTR_TCP:
- case OVS_KEY_ATTR_UDP:
- case OVS_KEY_ATTR_ICMP:
- case OVS_KEY_ATTR_ND:
- if (frag_type == OVS_FRAG_TYPE_LATER)
- goto invalid;
- goto ok;
-
- case OVS_KEY_ATTR_ARP:
- goto ok;
-
- default:
- WARN_ON_ONCE(1);
- }
-
-invalid:
- error = -EINVAL;
-
-ok:
- *key_lenp = key_len;
- return error;
-}
-
-/**
- * flow_metadata_from_nlattrs - parses Netlink attributes into a flow key.
- * @in_port: receives the extracted input port.
- * @tun_id: receives the extracted tunnel ID.
- * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
- * sequence.
- *
- * This parses a series of Netlink attributes that form a flow key, which must
- * take the same form accepted by flow_from_nlattrs(), but only enough of it to
- * get the metadata, that is, the parts of the flow key that cannot be
- * extracted from the packet itself.
- */
-int flow_metadata_from_nlattrs(u32 *priority, u16 *in_port, __be64 *tun_id,
- const struct nlattr *attr)
-{
- const struct nlattr *nla;
- u16 prev_type;
- int rem;
-
- *in_port = USHRT_MAX;
- *tun_id = 0;
- *priority = 0;
-
- prev_type = OVS_KEY_ATTR_UNSPEC;
- nla_for_each_nested(nla, attr, rem) {
- int type = nla_type(nla);
-
- if (type > OVS_KEY_ATTR_MAX || nla_len(nla) != ovs_key_lens[type])
- return -EINVAL;
-
- switch (TRANSITION(prev_type, type)) {
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_PRIORITY):
- *priority = nla_get_u32(nla);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_TUN_ID):
- case TRANSITION(OVS_KEY_ATTR_PRIORITY, OVS_KEY_ATTR_TUN_ID):
- *tun_id = nla_get_be64(nla);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_IN_PORT):
- case TRANSITION(OVS_KEY_ATTR_PRIORITY, OVS_KEY_ATTR_IN_PORT):
- case TRANSITION(OVS_KEY_ATTR_TUN_ID, OVS_KEY_ATTR_IN_PORT):
- if (nla_get_u32(nla) >= DP_MAX_PORTS)
- return -EINVAL;
- *in_port = nla_get_u32(nla);
- break;
-
- default:
- return 0;
- }
-
- prev_type = type;
- }
- if (rem)
- return -EINVAL;
- return 0;
-}
-
-int flow_to_nlattrs(const struct sw_flow_key *swkey, struct sk_buff *skb)
-{
- struct ovs_key_ethernet *eth_key;
- struct nlattr *nla;
-
- if (swkey->phy.priority)
- NLA_PUT_U32(skb, OVS_KEY_ATTR_PRIORITY, swkey->phy.priority);
-
- if (swkey->phy.tun_id != cpu_to_be64(0))
- NLA_PUT_BE64(skb, OVS_KEY_ATTR_TUN_ID, swkey->phy.tun_id);
-
- if (swkey->phy.in_port != USHRT_MAX)
- NLA_PUT_U32(skb, OVS_KEY_ATTR_IN_PORT, swkey->phy.in_port);
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
- if (!nla)
- goto nla_put_failure;
- eth_key = nla_data(nla);
- memcpy(eth_key->eth_src, swkey->eth.src, ETH_ALEN);
- memcpy(eth_key->eth_dst, swkey->eth.dst, ETH_ALEN);
-
- if (swkey->eth.tci != htons(0)) {
- struct ovs_key_8021q q_key;
-
- q_key.q_tpid = htons(ETH_P_8021Q);
- q_key.q_tci = swkey->eth.tci & ~htons(VLAN_TAG_PRESENT);
- NLA_PUT(skb, OVS_KEY_ATTR_8021Q, sizeof(q_key), &q_key);
- }
-
- if (swkey->eth.type == htons(ETH_P_802_2))
- return 0;
-
- NLA_PUT_BE16(skb, OVS_KEY_ATTR_ETHERTYPE, swkey->eth.type);
-
- if (swkey->eth.type == htons(ETH_P_IP)) {
- struct ovs_key_ipv4 *ipv4_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
- if (!nla)
- goto nla_put_failure;
- ipv4_key = nla_data(nla);
- memset(ipv4_key, 0, sizeof(struct ovs_key_ipv4));
- ipv4_key->ipv4_src = swkey->ipv4.addr.src;
- ipv4_key->ipv4_dst = swkey->ipv4.addr.dst;
- ipv4_key->ipv4_proto = swkey->ip.proto;
- ipv4_key->ipv4_tos = swkey->ip.tos_frag & ~INET_ECN_MASK;
- ipv4_key->ipv4_frag = swkey->ip.tos_frag & OVS_FRAG_TYPE_MASK;
- } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
- struct ovs_key_ipv6 *ipv6_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
- if (!nla)
- goto nla_put_failure;
- ipv6_key = nla_data(nla);
- memset(ipv6_key, 0, sizeof(struct ovs_key_ipv6));
- memcpy(ipv6_key->ipv6_src, &swkey->ipv6.addr.src,
- sizeof(ipv6_key->ipv6_src));
- memcpy(ipv6_key->ipv6_dst, &swkey->ipv6.addr.dst,
- sizeof(ipv6_key->ipv6_dst));
- ipv6_key->ipv6_label = swkey->ipv6.label;
- ipv6_key->ipv6_proto = swkey->ip.proto;
- ipv6_key->ipv6_tos = swkey->ip.tos_frag & ~INET_ECN_MASK;
- ipv6_key->ipv6_frag = swkey->ip.tos_frag & OVS_FRAG_TYPE_MASK;
- } else if (swkey->eth.type == htons(ETH_P_ARP)) {
- struct ovs_key_arp *arp_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
- if (!nla)
- goto nla_put_failure;
- arp_key = nla_data(nla);
- memset(arp_key, 0, sizeof(struct ovs_key_arp));
- arp_key->arp_sip = swkey->ipv4.addr.src;
- arp_key->arp_tip = swkey->ipv4.addr.dst;
- arp_key->arp_op = htons(swkey->ip.proto);
- memcpy(arp_key->arp_sha, swkey->ipv4.arp.sha, ETH_ALEN);
- memcpy(arp_key->arp_tha, swkey->ipv4.arp.tha, ETH_ALEN);
- }
-
- if ((swkey->eth.type == htons(ETH_P_IP) ||
- swkey->eth.type == htons(ETH_P_IPV6)) &&
- (swkey->ip.tos_frag & OVS_FRAG_TYPE_MASK) != OVS_FRAG_TYPE_LATER) {
-
- if (swkey->ip.proto == IPPROTO_TCP) {
- struct ovs_key_tcp *tcp_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
- if (!nla)
- goto nla_put_failure;
- tcp_key = nla_data(nla);
- if (swkey->eth.type == htons(ETH_P_IP)) {
- tcp_key->tcp_src = swkey->ipv4.tp.src;
- tcp_key->tcp_dst = swkey->ipv4.tp.dst;
- } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
- tcp_key->tcp_src = swkey->ipv6.tp.src;
- tcp_key->tcp_dst = swkey->ipv6.tp.dst;
- }
- } else if (swkey->ip.proto == IPPROTO_UDP) {
- struct ovs_key_udp *udp_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
- if (!nla)
- goto nla_put_failure;
- udp_key = nla_data(nla);
- if (swkey->eth.type == htons(ETH_P_IP)) {
- udp_key->udp_src = swkey->ipv4.tp.src;
- udp_key->udp_dst = swkey->ipv4.tp.dst;
- } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
- udp_key->udp_src = swkey->ipv6.tp.src;
- udp_key->udp_dst = swkey->ipv6.tp.dst;
- }
- } else if (swkey->eth.type == htons(ETH_P_IP) &&
- swkey->ip.proto == IPPROTO_ICMP) {
- struct ovs_key_icmp *icmp_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
- if (!nla)
- goto nla_put_failure;
- icmp_key = nla_data(nla);
- icmp_key->icmp_type = ntohs(swkey->ipv4.tp.src);
- icmp_key->icmp_code = ntohs(swkey->ipv4.tp.dst);
- } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
- swkey->ip.proto == IPPROTO_ICMPV6) {
- struct ovs_key_icmpv6 *icmpv6_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
- sizeof(*icmpv6_key));
- if (!nla)
- goto nla_put_failure;
- icmpv6_key = nla_data(nla);
- icmpv6_key->icmpv6_type = ntohs(swkey->ipv6.tp.src);
- icmpv6_key->icmpv6_code = ntohs(swkey->ipv6.tp.dst);
-
- if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
- icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
- struct ovs_key_nd *nd_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
- if (!nla)
- goto nla_put_failure;
- nd_key = nla_data(nla);
- memcpy(nd_key->nd_target, &swkey->ipv6.nd.target,
- sizeof(nd_key->nd_target));
- memcpy(nd_key->nd_sll, swkey->ipv6.nd.sll, ETH_ALEN);
- memcpy(nd_key->nd_tll, swkey->ipv6.nd.tll, ETH_ALEN);
+ error = parse_icmpv6(skb, key, nh_len);
+ if (error)
+ return error;
}
}
}
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