/*
- * Distributed under the terms of the GNU GPL version 2.
- * Copyright (c) 2007, 2008, 2009, 2010, 2011 Nicira Networks.
+ * Copyright (c) 2007-2011 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/tcp.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;
static int check_header(struct sk_buff *skb, int len)
{
return 0;
}
-static inline bool arphdr_ok(struct sk_buff *skb)
+static bool arphdr_ok(struct sk_buff *skb)
{
return pskb_may_pull(skb, skb_network_offset(skb) +
sizeof(struct arp_eth_header));
}
-static inline int check_iphdr(struct sk_buff *skb)
+static int check_iphdr(struct sk_buff *skb)
{
unsigned int nh_ofs = skb_network_offset(skb);
unsigned int ip_len;
return 0;
}
-static inline bool tcphdr_ok(struct sk_buff *skb)
+static bool tcphdr_ok(struct sk_buff *skb)
{
int th_ofs = skb_transport_offset(skb);
int tcp_len;
return true;
}
-static inline bool udphdr_ok(struct sk_buff *skb)
+static bool udphdr_ok(struct sk_buff *skb)
{
return pskb_may_pull(skb, skb_transport_offset(skb) +
sizeof(struct udphdr));
}
-static inline bool icmphdr_ok(struct sk_buff *skb)
+static bool icmphdr_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)
+u64 ovs_flow_used_time(unsigned long flow_jiffies)
{
struct timespec cur_ts;
u64 cur_ms, idle_ms;
}
#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)
-{
- 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;
-}
+ (offsetof(struct sw_flow_key, field) + \
+ FIELD_SIZEOF(struct sw_flow_key, field))
static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key,
int *key_lenp)
int payload_ofs;
struct ipv6hdr *nh;
uint8_t nexthdr;
+ __be16 frag_off;
int err;
- *key_lenp = SW_FLOW_KEY_OFFSET(ipv6.addr);
+ *key_lenp = SW_FLOW_KEY_OFFSET(ipv6.label);
err = check_header(skb, nh_ofs + sizeof(*nh));
if (unlikely(err))
payload_ofs = (u8 *)(nh + 1) - skb->data;
key->ip.proto = NEXTHDR_NONE;
- key->ip.tos_frag = ipv6_get_dsfield(nh) & ~INET_ECN_MASK;
- ipv6_addr_copy(&key->ipv6.addr.src, &nh->saddr);
- ipv6_addr_copy(&key->ipv6.addr.dst, &nh->daddr);
+ 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;
- 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;
#define TCP_FLAGS_OFFSET 13
#define TCP_FLAG_MASK 0x3f
-void flow_used(struct sw_flow *flow, struct sk_buff *skb)
+void ovs_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) {
+ if ((flow->key.eth.type == htons(ETH_P_IP) ||
+ flow->key.eth.type == htons(ETH_P_IPV6)) &&
+ flow->key.ip.proto == IPPROTO_TCP &&
+ likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) {
u8 *tcp = (u8 *)tcp_hdr(skb);
tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK;
}
spin_unlock(&flow->lock);
}
-struct sw_flow_actions *flow_actions_alloc(const struct nlattr *actions)
+struct sw_flow_actions *ovs_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))
+ if (actions_len > MAX_ACTIONS_BUFSIZE)
return ERR_PTR(-EINVAL);
sfa = kmalloc(sizeof(*sfa) + actions_len, GFP_KERNEL);
return sfa;
}
-struct sw_flow *flow_alloc(void)
+struct sw_flow *ovs_flow_alloc(void)
{
struct sw_flow *flow;
return flow;
}
-static struct hlist_head __rcu *find_bucket(struct flow_table * table, u32 hash)
+static struct hlist_head *find_bucket(struct flow_table *table, u32 hash)
{
+ hash = jhash_1word(hash, table->hash_seed);
return flex_array_get(table->buckets,
(hash & (table->n_buckets - 1)));
}
-static struct flex_array __rcu *alloc_buckets(unsigned int n_buckets)
+static struct flex_array *alloc_buckets(unsigned int n_buckets)
{
- struct flex_array __rcu * buckets;
+ struct flex_array *buckets;
int i, err;
buckets = flex_array_alloc(sizeof(struct hlist_head *),
return buckets;
}
-static void free_buckets(struct flex_array * 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 *ovs_flow_tbl_alloc(int new_size)
{
struct flow_table *table = kmalloc(sizeof(*table), GFP_KERNEL);
}
table->n_buckets = new_size;
table->count = 0;
+ table->node_ver = 0;
+ table->keep_flows = false;
+ get_random_bytes(&table->hash_seed, sizeof(u32));
return table;
}
static void flow_free(struct sw_flow *flow)
{
flow->dead = true;
- flow_put(flow);
+ ovs_flow_put(flow);
}
-void flow_tbl_destroy(struct flow_table *table)
+void ovs_flow_tbl_destroy(struct flow_table *table)
{
int i;
if (!table)
return;
+ if (table->keep_flows)
+ goto skip_flows;
+
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;
+ int ver = table->node_ver;
- hlist_for_each_entry_safe(flow, node, n, head, hash_node) {
- hlist_del_init_rcu(&flow->hash_node);
+ hlist_for_each_entry_safe(flow, node, n, head, hash_node[ver]) {
+ hlist_del_rcu(&flow->hash_node[ver]);
flow_free(flow);
}
}
+skip_flows:
free_buckets(table->buckets);
kfree(table);
}
{
struct flow_table *table = container_of(rcu, struct flow_table, rcu);
- flow_tbl_destroy(table);
+ ovs_flow_tbl_destroy(table);
}
-void flow_tbl_deferred_destroy(struct flow_table *table)
+void ovs_flow_tbl_deferred_destroy(struct flow_table *table)
{
- if (!table)
- return;
+ if (!table)
+ return;
- call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb);
+ 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 *ovs_flow_tbl_next(struct flow_table *table, u32 *bucket, u32 *last)
{
struct sw_flow *flow;
struct hlist_head *head;
struct hlist_node *n;
+ int ver;
int i;
+ ver = table->node_ver;
while (*bucket < table->n_buckets) {
i = 0;
head = flex_array_get(table->buckets, *bucket);
- hlist_for_each_entry_rcu(flow, n, head, hash_node) {
+ hlist_for_each_entry_rcu(flow, n, head, hash_node[ver]) {
if (i < *last) {
i++;
continue;
return NULL;
}
-struct flow_table *flow_tbl_expand(struct flow_table *table)
+static void flow_table_copy_flows(struct flow_table *old, struct flow_table *new)
{
- struct flow_table *new_table;
- int n_buckets = table->n_buckets * 2;
+ int old_ver;
int i;
- new_table = flow_tbl_alloc(n_buckets);
- if (!new_table)
- return ERR_PTR(-ENOMEM);
+ old_ver = old->node_ver;
+ new->node_ver = !old_ver;
- for (i = 0; i < table->n_buckets; i++) {
+ /* Insert in new table. */
+ for (i = 0; i < old->n_buckets; i++) {
struct sw_flow *flow;
struct hlist_head *head;
- struct hlist_node *n, *pos;
+ struct hlist_node *n;
- head = flex_array_get(table->buckets, i);
+ head = flex_array_get(old->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);
- }
+ hlist_for_each_entry(flow, n, head, hash_node[old_ver])
+ ovs_flow_tbl_insert(new, flow);
}
+ old->keep_flows = true;
+}
+
+static struct flow_table *__flow_tbl_rehash(struct flow_table *table, int n_buckets)
+{
+ struct flow_table *new_table;
+
+ new_table = ovs_flow_tbl_alloc(n_buckets);
+ if (!new_table)
+ return ERR_PTR(-ENOMEM);
+
+ flow_table_copy_flows(table, new_table);
return new_table;
}
-/* RCU callback used by flow_deferred_free. */
+struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table)
+{
+ return __flow_tbl_rehash(table, table->n_buckets);
+}
+
+struct flow_table *ovs_flow_tbl_expand(struct flow_table *table)
+{
+ return __flow_tbl_rehash(table, table->n_buckets * 2);
+}
+
+/* RCU callback used by ovs_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);
+ ovs_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)
+void ovs_flow_deferred_free(struct sw_flow *flow)
{
call_rcu(&flow->rcu, rcu_free_flow_callback);
}
-void flow_hold(struct sw_flow *flow)
+void ovs_flow_hold(struct sw_flow *flow)
{
atomic_inc(&flow->refcnt);
}
-void flow_put(struct sw_flow *flow)
+void ovs_flow_put(struct sw_flow *flow)
{
if (unlikely(!flow))
return;
}
}
-/* RCU callback used by flow_deferred_free_acts. */
+/* RCU callback used by ovs_flow_deferred_free_acts. */
static void rcu_free_acts_callback(struct rcu_head *rcu)
{
struct sw_flow_actions *sf_acts = container_of(rcu,
/* 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)
+void ovs_flow_deferred_free_acts(struct sw_flow_actions *sf_acts)
{
call_rcu(&sf_acts->rcu, rcu_free_acts_callback);
}
};
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;
}
nd = (struct nd_msg *)skb_transport_header(skb);
- ipv6_addr_copy(&key->ipv6.nd.target, &nd->target);
+ key->ipv6.nd.target = nd->target;
key_len = SW_FLOW_KEY_OFFSET(ipv6.nd);
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 (unlikely(!opt_len || opt_len > icmp_len))
}
/**
- * 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.
* of a correct length, otherwise the same as skb->network_header.
* For other key->dl_type values it is left untouched.
*/
-int flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key,
+int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key,
int *key_lenp)
{
int error = 0;
struct ethhdr *eth;
memset(key, 0, sizeof(*key));
- key->eth.tun_id = OVS_CB(skb)->tun_id;
- key->eth.in_port = in_port;
+
+ key->phy.priority = skb->priority;
+ key->phy.tun_id = OVS_CB(skb)->tun_id;
+ key->phy.in_port = in_port;
skb_reset_mac_header(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;
+ key->ip.frag = OVS_FRAG_TYPE_LATER;
goto out;
}
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) {
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. */
+ * 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);
}
goto out;
}
- if ((key->ip.tos_frag & OVS_FRAG_TYPE_MASK) == OVS_FRAG_TYPE_LATER)
+ if (key->ip.frag == OVS_FRAG_TYPE_LATER)
goto out;
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) {
return error;
}
-u32 flow_hash(const struct sw_flow_key *key, int key_len)
+u32 ovs_flow_hash(const struct sw_flow_key *key, int key_len)
{
- return jhash2((u32*)key, DIV_ROUND_UP(key_len, sizeof(u32)), hash_seed);
+ return jhash2((u32 *)key, DIV_ROUND_UP(key_len, sizeof(u32)), 0);
}
-struct sw_flow * flow_tbl_lookup(struct flow_table *table,
+struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *table,
struct sw_flow_key *key, int key_len)
{
struct sw_flow *flow;
struct hlist_head *head;
u32 hash;
- hash = flow_hash(key, key_len);
+ hash = ovs_flow_hash(key, key_len);
head = find_bucket(table, hash);
- hlist_for_each_entry_rcu(flow, n, head, hash_node) {
+ hlist_for_each_entry_rcu(flow, n, head, hash_node[table->node_ver]) {
if (flow->hash == hash &&
!memcmp(&flow->key, key, key_len)) {
return NULL;
}
-void flow_tbl_insert(struct flow_table *table, struct sw_flow *flow)
+void ovs_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);
+ hlist_add_head_rcu(&flow->hash_node[table->node_ver], head);
table->count++;
}
-void flow_tbl_remove(struct flow_table *table, struct sw_flow *flow)
+void ovs_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;
+ hlist_del_rcu(&flow->hash_node[table->node_ver]);
+ table->count--;
+ BUG_ON(table->count < 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_TUN_ID] = 8,
- [OVS_KEY_ATTR_IN_PORT] = 4,
+const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
+ [OVS_KEY_ATTR_ENCAP] = -1,
+ [OVS_KEY_ATTR_PRIORITY] = sizeof(u32),
+ [OVS_KEY_ATTR_IN_PORT] = sizeof(u32),
[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_VLAN] = sizeof(__be16),
+ [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16),
[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_ICMPV6] = sizeof(struct ovs_key_icmpv6),
[OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp),
[OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd),
+
+ /* Not upstream. */
+ [OVS_KEY_ATTR_TUN_ID] = sizeof(__be64),
};
+static int ipv4_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_len,
+ const struct nlattr *a[], u64 *attrs)
+{
+ const struct ovs_key_icmp *icmp_key;
+ const struct ovs_key_tcp *tcp_key;
+ const struct ovs_key_udp *udp_key;
+
+ switch (swkey->ip.proto) {
+ case IPPROTO_TCP:
+ if (!(*attrs & (1 << OVS_KEY_ATTR_TCP)))
+ return -EINVAL;
+ *attrs &= ~(1 << OVS_KEY_ATTR_TCP);
+
+ *key_len = SW_FLOW_KEY_OFFSET(ipv4.tp);
+ tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
+ swkey->ipv4.tp.src = tcp_key->tcp_src;
+ swkey->ipv4.tp.dst = tcp_key->tcp_dst;
+ break;
+
+ case IPPROTO_UDP:
+ if (!(*attrs & (1 << OVS_KEY_ATTR_UDP)))
+ return -EINVAL;
+ *attrs &= ~(1 << OVS_KEY_ATTR_UDP);
+
+ *key_len = SW_FLOW_KEY_OFFSET(ipv4.tp);
+ udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
+ swkey->ipv4.tp.src = udp_key->udp_src;
+ swkey->ipv4.tp.dst = udp_key->udp_dst;
+ break;
+
+ case IPPROTO_ICMP:
+ if (!(*attrs & (1 << OVS_KEY_ATTR_ICMP)))
+ return -EINVAL;
+ *attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
+
+ *key_len = SW_FLOW_KEY_OFFSET(ipv4.tp);
+ icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
+ swkey->ipv4.tp.src = htons(icmp_key->icmp_type);
+ swkey->ipv4.tp.dst = htons(icmp_key->icmp_code);
+ break;
+ }
+
+ return 0;
+}
+
+static int ipv6_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_len,
+ const struct nlattr *a[], u64 *attrs)
+{
+ const struct ovs_key_icmpv6 *icmpv6_key;
+ const struct ovs_key_tcp *tcp_key;
+ const struct ovs_key_udp *udp_key;
+
+ switch (swkey->ip.proto) {
+ case IPPROTO_TCP:
+ if (!(*attrs & (1 << OVS_KEY_ATTR_TCP)))
+ return -EINVAL;
+ *attrs &= ~(1 << OVS_KEY_ATTR_TCP);
+
+ *key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
+ tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
+ swkey->ipv6.tp.src = tcp_key->tcp_src;
+ swkey->ipv6.tp.dst = tcp_key->tcp_dst;
+ break;
+
+ case IPPROTO_UDP:
+ if (!(*attrs & (1 << OVS_KEY_ATTR_UDP)))
+ return -EINVAL;
+ *attrs &= ~(1 << OVS_KEY_ATTR_UDP);
+
+ *key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
+ udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
+ swkey->ipv6.tp.src = udp_key->udp_src;
+ swkey->ipv6.tp.dst = udp_key->udp_dst;
+ break;
+
+ case IPPROTO_ICMPV6:
+ if (!(*attrs & (1 << OVS_KEY_ATTR_ICMPV6)))
+ return -EINVAL;
+ *attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
+
+ *key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
+ icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
+ swkey->ipv6.tp.src = htons(icmpv6_key->icmpv6_type);
+ swkey->ipv6.tp.dst = htons(icmpv6_key->icmpv6_code);
+
+ if (swkey->ipv6.tp.src == htons(NDISC_NEIGHBOUR_SOLICITATION) ||
+ swkey->ipv6.tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
+ const struct ovs_key_nd *nd_key;
+
+ if (!(*attrs & (1 << OVS_KEY_ATTR_ND)))
+ return -EINVAL;
+ *attrs &= ~(1 << OVS_KEY_ATTR_ND);
+
+ *key_len = SW_FLOW_KEY_OFFSET(ipv6.nd);
+ nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
+ 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;
+ }
+
+ return 0;
+}
+
+static int parse_flow_nlattrs(const struct nlattr *attr,
+ const struct nlattr *a[], u64 *attrsp)
+{
+ const struct nlattr *nla;
+ u64 attrs;
+ int rem;
+
+ attrs = 0;
+ nla_for_each_nested(nla, attr, rem) {
+ u16 type = nla_type(nla);
+ int expected_len;
+
+ if (type > OVS_KEY_ATTR_MAX || attrs & (1ULL << type))
+ return -EINVAL;
+
+ expected_len = ovs_key_lens[type];
+ if (nla_len(nla) != expected_len && expected_len != -1)
+ return -EINVAL;
+
+ attrs |= 1ULL << type;
+ a[type] = nla;
+ }
+ if (rem)
+ return -EINVAL;
+
+ *attrsp = attrs;
+ return 0;
+}
+
/**
- * flow_from_nlattrs - parses Netlink attributes into a flow key.
+ * ovs_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:
- *
- * [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,
+int ovs_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;
+ const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
+ const struct ovs_key_ethernet *eth_key;
int key_len;
+ u64 attrs;
+ int err;
- memset(swkey, 0, sizeof(*swkey));
- swkey->eth.in_port = USHRT_MAX;
- swkey->eth.type = htons(ETH_P_802_2);
+ memset(swkey, 0, sizeof(struct sw_flow_key));
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);
+ err = parse_flow_nlattrs(attr, a, &attrs);
+ if (err)
+ return err;
- if (type > OVS_KEY_ATTR_MAX || nla_len(nla) != ovs_key_lens[type])
- goto invalid;
+ /* Metadata attributes. */
+ if (attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
+ swkey->phy.priority = nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]);
+ attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
+ }
+ if (attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
+ u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
+ if (in_port >= DP_MAX_PORTS)
+ return -EINVAL;
+ swkey->phy.in_port = in_port;
+ attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
+ } else {
+ swkey->phy.in_port = DP_MAX_PORTS;
+ }
-#define TRANSITION(PREV_TYPE, TYPE) (((PREV_TYPE) << 16) | (TYPE))
- switch (TRANSITION(prev_type, type)) {
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_TUN_ID):
- swkey->eth.tun_id = nla_get_be64(nla);
- break;
+ if (attrs & (1ULL << OVS_KEY_ATTR_TUN_ID)) {
+ swkey->phy.tun_id = nla_get_be64(a[OVS_KEY_ATTR_TUN_ID]);
+ attrs &= ~(1ULL << OVS_KEY_ATTR_TUN_ID);
+ }
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, 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->eth.in_port = nla_get_u32(nla);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, 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;
+ /* Data attributes. */
+ if (!(attrs & (1 << OVS_KEY_ATTR_ETHERNET)))
+ return -EINVAL;
+ attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
- 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;
+ eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
+ memcpy(swkey->eth.src, eth_key->eth_src, ETH_ALEN);
+ memcpy(swkey->eth.dst, eth_key->eth_dst, ETH_ALEN);
- 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;
+ if (attrs & (1u << OVS_KEY_ATTR_ETHERTYPE) &&
+ nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q)) {
+ const struct nlattr *encap;
+ __be16 tci;
- case TRANSITION(OVS_KEY_ATTR_ETHERTYPE, OVS_KEY_ATTR_IPV6):
- key_len = SW_FLOW_KEY_OFFSET(ipv6.addr);
- if (swkey->eth.type != htons(ETH_P_IPV6))
- goto invalid;
- ipv6_key = nla_data(nla);
- 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;
+ if (attrs != ((1 << OVS_KEY_ATTR_VLAN) |
+ (1 << OVS_KEY_ATTR_ETHERTYPE) |
+ (1 << OVS_KEY_ATTR_ENCAP)))
+ return -EINVAL;
- 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;
+ encap = a[OVS_KEY_ATTR_ENCAP];
+ tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
+ if (tci & htons(VLAN_TAG_PRESENT)) {
+ swkey->eth.tci = tci;
+
+ err = parse_flow_nlattrs(encap, a, &attrs);
+ if (err)
+ return err;
+ } else if (!tci) {
+ /* Corner case for truncated 802.1Q header. */
+ if (nla_len(encap))
+ return -EINVAL;
- 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;
+ swkey->eth.type = htons(ETH_P_8021Q);
+ *key_lenp = key_len;
+ return 0;
+ } else {
+ return -EINVAL;
+ }
+ }
- 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;
+ if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
+ swkey->eth.type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
+ if (ntohs(swkey->eth.type) < 1536)
+ return -EINVAL;
+ attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
+ } else {
+ swkey->eth.type = htons(ETH_P_802_2);
+ }
- 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;
+ if (swkey->eth.type == htons(ETH_P_IP)) {
+ const struct ovs_key_ipv4 *ipv4_key;
- 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;
+ if (!(attrs & (1 << OVS_KEY_ATTR_IPV4)))
+ return -EINVAL;
+ attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
- 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;
+ key_len = SW_FLOW_KEY_OFFSET(ipv4.addr);
+ ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
+ if (ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX)
+ return -EINVAL;
+ swkey->ip.proto = ipv4_key->ipv4_proto;
+ swkey->ip.tos = ipv4_key->ipv4_tos;
+ swkey->ip.ttl = ipv4_key->ipv4_ttl;
+ swkey->ip.frag = ipv4_key->ipv4_frag;
+ swkey->ipv4.addr.src = ipv4_key->ipv4_src;
+ swkey->ipv4.addr.dst = ipv4_key->ipv4_dst;
+
+ if (swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
+ err = ipv4_flow_from_nlattrs(swkey, &key_len, a, &attrs);
+ if (err)
+ return err;
+ }
+ } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
+ const struct ovs_key_ipv6 *ipv6_key;
- 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;
+ if (!(attrs & (1 << OVS_KEY_ATTR_IPV6)))
+ return -EINVAL;
+ attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
- default:
- goto invalid;
+ key_len = SW_FLOW_KEY_OFFSET(ipv6.label);
+ ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
+ if (ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX)
+ return -EINVAL;
+ swkey->ipv6.label = ipv6_key->ipv6_label;
+ swkey->ip.proto = ipv6_key->ipv6_proto;
+ swkey->ip.tos = ipv6_key->ipv6_tclass;
+ swkey->ip.ttl = ipv6_key->ipv6_hlimit;
+ swkey->ip.frag = ipv6_key->ipv6_frag;
+ 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));
+
+ if (swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
+ err = ipv6_flow_from_nlattrs(swkey, &key_len, a, &attrs);
+ if (err)
+ return err;
}
+ } else if (swkey->eth.type == htons(ETH_P_ARP)) {
+ const struct ovs_key_arp *arp_key;
- 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_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_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);
- }
+ if (!(attrs & (1 << OVS_KEY_ATTR_ARP)))
+ return -EINVAL;
+ attrs &= ~(1 << OVS_KEY_ATTR_ARP);
-invalid:
- error = -EINVAL;
+ key_len = SW_FLOW_KEY_OFFSET(ipv4.arp);
+ arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
+ swkey->ipv4.addr.src = arp_key->arp_sip;
+ swkey->ipv4.addr.dst = arp_key->arp_tip;
+ if (arp_key->arp_op & htons(0xff00))
+ return -EINVAL;
+ 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);
+ }
-ok:
- WARN_ON_ONCE(!key_len && !error);
+ if (attrs)
+ return -EINVAL;
*key_lenp = key_len;
- return error;
+
+ return 0;
}
/**
- * flow_metadata_from_nlattrs - parses Netlink attributes into a flow key.
+ * ovs_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
* get the metadata, that is, the parts of the flow key that cannot be
* extracted from the packet itself.
*/
-int flow_metadata_from_nlattrs(u16 *in_port, __be64 *tun_id,
- const struct nlattr *attr)
+int ovs_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;
+ *in_port = DP_MAX_PORTS;
*tun_id = 0;
+ *priority = 0;
- prev_type = OVS_KEY_ATTR_UNSPEC;
nla_for_each_nested(nla, attr, rem) {
- int type = nla_type(nla);
+ int type = nla_type(nla);
- if (type > OVS_KEY_ATTR_MAX || nla_len(nla) != ovs_key_lens[type])
- return -EINVAL;
+ if (type <= OVS_KEY_ATTR_MAX && ovs_key_lens[type] > 0) {
+ if (nla_len(nla) != ovs_key_lens[type])
+ return -EINVAL;
- switch (TRANSITION(prev_type, type)) {
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_TUN_ID):
- *tun_id = nla_get_be64(nla);
- break;
+ switch (type) {
+ case OVS_KEY_ATTR_PRIORITY:
+ *priority = nla_get_u32(nla);
+ break;
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, 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;
+ case OVS_KEY_ATTR_TUN_ID:
+ *tun_id = nla_get_be64(nla);
+ break;
- default:
- return 0;
+ case OVS_KEY_ATTR_IN_PORT:
+ if (nla_get_u32(nla) >= DP_MAX_PORTS)
+ return -EINVAL;
+ *in_port = nla_get_u32(nla);
+ break;
+ }
}
-
- prev_type = type;
}
if (rem)
return -EINVAL;
return 0;
}
-int flow_to_nlattrs(const struct sw_flow_key *swkey, struct sk_buff *skb)
+int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey, struct sk_buff *skb)
{
struct ovs_key_ethernet *eth_key;
- struct nlattr *nla;
+ struct nlattr *nla, *encap;
- /* This is an imperfect sanity-check that FLOW_BUFSIZE doesn't need
- * to be updated, but will at least raise awareness when new
- * datapath key types are added. */
- BUILD_BUG_ON(__OVS_KEY_ATTR_MAX != 14);
+ if (swkey->phy.priority &&
+ nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, swkey->phy.priority))
+ goto nla_put_failure;
- if (swkey->eth.tun_id != cpu_to_be64(0))
- NLA_PUT_BE64(skb, OVS_KEY_ATTR_TUN_ID, swkey->eth.tun_id);
+ if (swkey->phy.tun_id != cpu_to_be64(0) &&
+ nla_put_be64(skb, OVS_KEY_ATTR_TUN_ID, swkey->phy.tun_id))
+ goto nla_put_failure;
- if (swkey->eth.in_port != USHRT_MAX)
- NLA_PUT_U32(skb, OVS_KEY_ATTR_IN_PORT, swkey->eth.in_port);
+ if (swkey->phy.in_port != DP_MAX_PORTS &&
+ nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, swkey->phy.in_port))
+ goto nla_put_failure;
nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
if (!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.tci || swkey->eth.type == htons(ETH_P_8021Q)) {
+ if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, htons(ETH_P_8021Q)) ||
+ nla_put_be16(skb, OVS_KEY_ATTR_VLAN, swkey->eth.tci))
+ goto nla_put_failure;
+ encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
+ if (!swkey->eth.tci)
+ goto unencap;
+ } else {
+ encap = NULL;
}
if (swkey->eth.type == htons(ETH_P_802_2))
- return 0;
+ goto unencap;
- NLA_PUT_BE16(skb, OVS_KEY_ATTR_ETHERTYPE, swkey->eth.type);
+ if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, swkey->eth.type))
+ goto nla_put_failure;
if (swkey->eth.type == htons(ETH_P_IP)) {
struct ovs_key_ipv4 *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;
+ ipv4_key->ipv4_tos = swkey->ip.tos;
+ ipv4_key->ipv4_ttl = swkey->ip.ttl;
+ ipv4_key->ipv4_frag = swkey->ip.frag;
} else if (swkey->eth.type == htons(ETH_P_IPV6)) {
struct ovs_key_ipv6 *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;
+ ipv6_key->ipv6_tclass = swkey->ip.tos;
+ ipv6_key->ipv6_hlimit = swkey->ip.ttl;
+ ipv6_key->ipv6_frag = swkey->ip.frag;
} else if (swkey->eth.type == htons(ETH_P_ARP)) {
struct ovs_key_arp *arp_key;
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) {
+ swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
if (swkey->ip.proto == IPPROTO_TCP) {
struct ovs_key_tcp *tcp_key;
}
}
+unencap:
+ if (encap)
+ nla_nest_end(skb, encap);
+
return 0;
nla_put_failure:
/* Initializes the flow module.
* Returns zero if successful or a negative error code. */
-int flow_init(void)
+int ovs_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)
+void ovs_flow_exit(void)
{
kmem_cache_destroy(flow_cache);
}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff