/*
- * Copyright (c) 2007-2011 Nicira, Inc.
+ * Copyright (c) 2007-2013 Nicira, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
static struct kmem_cache *flow_cache;
+static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask,
+ struct sw_flow_key_range *range, u8 val);
+
+static void update_range__(struct sw_flow_match *match,
+ size_t offset, size_t size, bool is_mask)
+{
+ struct sw_flow_key_range *range = NULL;
+ size_t start = offset;
+ size_t end = offset + size;
+
+ if (!is_mask)
+ range = &match->range;
+ else if (match->mask)
+ range = &match->mask->range;
+
+ if (!range)
+ return;
+
+ if (range->start == range->end) {
+ range->start = start;
+ range->end = end;
+ return;
+ }
+
+ if (range->start > start)
+ range->start = start;
+
+ if (range->end < end)
+ range->end = end;
+}
+
+#define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
+ do { \
+ update_range__(match, offsetof(struct sw_flow_key, field), \
+ sizeof((match)->key->field), is_mask); \
+ if (is_mask && match->mask != NULL) { \
+ (match)->mask->key.field = value; \
+ } else { \
+ (match)->key->field = value; \
+ } \
+ } while (0)
+
+#define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
+ do { \
+ update_range__(match, offsetof(struct sw_flow_key, field), \
+ len, is_mask); \
+ if (is_mask && match->mask != NULL) { \
+ memcpy(&(match)->mask->key.field, value_p, len); \
+ } else { \
+ memcpy(&(match)->key->field, value_p, len); \
+ } \
+ } while (0)
+
+void ovs_match_init(struct sw_flow_match *match,
+ struct sw_flow_key *key,
+ struct sw_flow_mask *mask)
+{
+ memset(match, 0, sizeof(*match));
+ match->key = key;
+ match->mask = mask;
+
+ memset(key, 0, sizeof(*key));
+
+ if (mask) {
+ memset(&mask->key, 0, sizeof(mask->key));
+ mask->range.start = mask->range.end = 0;
+ }
+}
+
+static bool ovs_match_validate(const struct sw_flow_match *match,
+ u64 key_attrs, u64 mask_attrs)
+{
+ u64 key_expected = 1ULL << OVS_KEY_ATTR_ETHERNET;
+ u64 mask_allowed = key_attrs; /* At most allow all key attributes */
+
+ /* The following mask attributes allowed only if they
+ * pass the validation tests. */
+ mask_allowed &= ~((1ULL << OVS_KEY_ATTR_IPV4)
+ | (1ULL << OVS_KEY_ATTR_IPV6)
+ | (1ULL << OVS_KEY_ATTR_TCP)
+ | (1ULL << OVS_KEY_ATTR_UDP)
+ | (1ULL << OVS_KEY_ATTR_ICMP)
+ | (1ULL << OVS_KEY_ATTR_ICMPV6)
+ | (1ULL << OVS_KEY_ATTR_ARP)
+ | (1ULL << OVS_KEY_ATTR_ND));
+
+ if (match->key->eth.type == htons(ETH_P_802_2) &&
+ match->mask && (match->mask->key.eth.type == htons(0xffff)))
+ mask_allowed |= (1ULL << OVS_KEY_ATTR_ETHERTYPE);
+
+ /* Check key attributes. */
+ if (match->key->eth.type == htons(ETH_P_ARP)
+ || match->key->eth.type == htons(ETH_P_RARP)) {
+ key_expected |= 1ULL << OVS_KEY_ATTR_ARP;
+ if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
+ mask_allowed |= 1ULL << OVS_KEY_ATTR_ARP;
+ }
+
+ if (match->key->eth.type == htons(ETH_P_IP)) {
+ key_expected |= 1ULL << OVS_KEY_ATTR_IPV4;
+ if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
+ mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV4;
+
+ if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
+ if (match->key->ip.proto == IPPROTO_UDP) {
+ key_expected |= 1ULL << OVS_KEY_ATTR_UDP;
+ if (match->mask && (match->mask->key.ip.proto == 0xff))
+ mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP;
+ }
+
+ if (match->key->ip.proto == IPPROTO_TCP) {
+ key_expected |= 1ULL << OVS_KEY_ATTR_TCP;
+ if (match->mask && (match->mask->key.ip.proto == 0xff))
+ mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP;
+ }
+
+ if (match->key->ip.proto == IPPROTO_ICMP) {
+ key_expected |= 1ULL << OVS_KEY_ATTR_ICMP;
+ if (match->mask && (match->mask->key.ip.proto == 0xff))
+ mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMP;
+ }
+ }
+ }
+
+ if (match->key->eth.type == htons(ETH_P_IPV6)) {
+ key_expected |= 1ULL << OVS_KEY_ATTR_IPV6;
+ if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
+ mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV6;
+
+ if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
+ if (match->key->ip.proto == IPPROTO_UDP) {
+ key_expected |= 1ULL << OVS_KEY_ATTR_UDP;
+ if (match->mask && (match->mask->key.ip.proto == 0xff))
+ mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP;
+ }
+
+ if (match->key->ip.proto == IPPROTO_TCP) {
+ key_expected |= 1ULL << OVS_KEY_ATTR_TCP;
+ if (match->mask && (match->mask->key.ip.proto == 0xff))
+ mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP;
+ }
+
+ if (match->key->ip.proto == IPPROTO_ICMPV6) {
+ key_expected |= 1ULL << OVS_KEY_ATTR_ICMPV6;
+ if (match->mask && (match->mask->key.ip.proto == 0xff))
+ mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMPV6;
+
+ if (match->key->ipv6.tp.src ==
+ htons(NDISC_NEIGHBOUR_SOLICITATION) ||
+ match->key->ipv6.tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
+ key_expected |= 1ULL << OVS_KEY_ATTR_ND;
+ if (match->mask && (match->mask->key.ipv6.tp.src == htons(0xffff)))
+ mask_allowed |= 1ULL << OVS_KEY_ATTR_ND;
+ }
+ }
+ }
+ }
+
+ if ((key_attrs & key_expected) != key_expected)
+ /* Key attributes check failed. */
+ return false;
+
+ if ((mask_attrs & mask_allowed) != mask_attrs)
+ /* Mask attributes check failed. */
+ return false;
+
+ return true;
+}
+
static int check_header(struct sk_buff *skb, int len)
{
if (unlikely(skb->len < len))
return cur_ms - idle_ms;
}
-#define SW_FLOW_KEY_OFFSET(field) \
- (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)
+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;
__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;
sizeof(struct icmp6hdr));
}
+static void flow_key_mask(struct sw_flow_key *dst,
+ const struct sw_flow_key *src,
+ const struct sw_flow_mask *mask)
+{
+ u8 *m = (u8 *)&mask->key + mask->range.start;
+ u8 *s = (u8 *)src + mask->range.start;
+ u8 *d = (u8 *)dst + mask->range.start;
+ int i;
+
+ memset(dst, 0, sizeof(*dst));
+ for (i = 0; i < ovs_sw_flow_mask_size_roundup(mask); i++) {
+ *d = *s & *m;
+ d++, s++, m++;
+ }
+}
+
#define TCP_FLAGS_OFFSET 13
#define TCP_FLAG_MASK 0x3f
spin_lock_init(&flow->lock);
flow->sf_acts = NULL;
+ flow->mask = NULL;
return flow;
}
table->node_ver = 0;
table->keep_flows = false;
get_random_bytes(&table->hash_seed, sizeof(u32));
+ INIT_LIST_HEAD(&table->mask_list);
return table;
}
-void ovs_flow_tbl_destroy(struct flow_table *table)
+static void __flow_tbl_destroy(struct flow_table *table)
{
int i;
- if (!table)
- return;
-
if (table->keep_flows)
goto skip_flows;
hlist_for_each_entry_safe(flow, n, head, hash_node[ver]) {
hlist_del_rcu(&flow->hash_node[ver]);
- ovs_flow_free(flow);
+ ovs_flow_free(flow, false);
}
}
{
struct flow_table *table = container_of(rcu, struct flow_table, rcu);
- ovs_flow_tbl_destroy(table);
+ __flow_tbl_destroy(table);
}
-void ovs_flow_tbl_deferred_destroy(struct flow_table *table)
+void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred)
{
if (!table)
return;
- call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb);
+ if (deferred)
+ call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb);
+ else
+ __flow_tbl_destroy(table);
}
-struct sw_flow *ovs_flow_tbl_next(struct flow_table *table, u32 *bucket, u32 *last)
+struct sw_flow *ovs_flow_dump_next(struct flow_table *table, u32 *bucket, u32 *last)
{
struct sw_flow *flow;
struct hlist_head *head;
return NULL;
}
-static void __flow_tbl_insert(struct flow_table *table, struct sw_flow *flow)
+static void __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[table->node_ver], head);
+
table->count++;
}
head = flex_array_get(old->buckets, i);
hlist_for_each_entry(flow, head, hash_node[old_ver])
- __flow_tbl_insert(new, flow);
+ __tbl_insert(new, flow);
}
+
+ new->mask_list = old->mask_list;
old->keep_flows = true;
}
return __flow_tbl_rehash(table, table->n_buckets * 2);
}
-void ovs_flow_free(struct sw_flow *flow)
+static void __flow_free(struct sw_flow *flow)
{
- if (unlikely(!flow))
- return;
-
kfree((struct sf_flow_acts __force *)flow->sf_acts);
kmem_cache_free(flow_cache, flow);
}
-/* 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);
- ovs_flow_free(flow);
+ __flow_free(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 ovs_flow_deferred_free(struct sw_flow *flow)
+void ovs_flow_free(struct sw_flow *flow, bool deferred)
{
- call_rcu(&flow->rcu, rcu_free_flow_callback);
+ if (!flow)
+ return;
+
+ ovs_sw_flow_mask_del_ref((struct sw_flow_mask __force *)flow->mask,
+ deferred);
+
+ if (deferred)
+ call_rcu(&flow->rcu, rcu_free_flow_callback);
+ else
+ __flow_free(flow);
}
/* RCU callback used by ovs_flow_deferred_free_acts. */
}
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);
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);
key->ipv6.nd.target = nd->target;
- key_len = SW_FLOW_KEY_OFFSET(ipv6.nd);
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
}
}
- 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;
}
/**
* of a correct length, otherwise the same as skb->network_header.
* For other key->eth.type values it is left untouched.
*/
-int ovs_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));
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);
offset = nh->frag_off & htons(IP_OFFSET);
if (offset) {
key->ip.frag = OVS_FRAG_TYPE_LATER;
- goto out;
+ return 0;
}
if (nh->frag_off & htons(IP_MF) ||
skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
/* 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;
}
} 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;
}
} 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
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);
}
} 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.frag == OVS_FRAG_TYPE_LATER)
- goto out;
+ return 0;
if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
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;
}
} 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;
}
} 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;
+ error = parse_icmpv6(skb, key, nh_len);
+ if (error)
+ return error;
}
}
}
-out:
- *key_lenp = key_len;
- return error;
+ return 0;
}
static u32 ovs_flow_hash(const struct sw_flow_key *key, int key_start, int key_len)
DIV_ROUND_UP(key_len - key_start, sizeof(u32)), 0);
}
-static int flow_key_start(struct sw_flow_key *key)
+static int flow_key_start(const struct sw_flow_key *key)
{
if (key->tun_key.ipv4_dst)
return 0;
return offsetof(struct sw_flow_key, phy);
}
-struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *table,
- struct sw_flow_key *key, int key_len)
+static bool __cmp_key(const struct sw_flow_key *key1,
+ const struct sw_flow_key *key2, int key_start, int key_len)
+{
+ return !memcmp((u8 *)key1 + key_start,
+ (u8 *)key2 + key_start, (key_len - key_start));
+}
+
+static bool __flow_cmp_key(const struct sw_flow *flow,
+ const struct sw_flow_key *key, int key_start, int key_len)
+{
+ return __cmp_key(&flow->key, key, key_start, key_len);
+}
+
+static bool __flow_cmp_unmasked_key(const struct sw_flow *flow,
+ const struct sw_flow_key *key, int key_start, int key_len)
+{
+ return __cmp_key(&flow->unmasked_key, key, key_start, key_len);
+}
+
+bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow,
+ const struct sw_flow_key *key, int key_len)
+{
+ int key_start;
+ key_start = flow_key_start(key);
+
+ return __flow_cmp_unmasked_key(flow, key, key_start, key_len);
+
+}
+
+struct sw_flow *ovs_flow_lookup_unmasked_key(struct flow_table *table,
+ struct sw_flow_match *match)
+{
+ struct sw_flow_key *unmasked = match->key;
+ int key_len = match->range.end;
+ struct sw_flow *flow;
+
+ flow = ovs_flow_lookup(table, unmasked);
+ if (flow && (!ovs_flow_cmp_unmasked_key(flow, unmasked, key_len)))
+ flow = NULL;
+
+ return flow;
+}
+
+static struct sw_flow *ovs_masked_flow_lookup(struct flow_table *table,
+ const struct sw_flow_key *flow_key,
+ struct sw_flow_mask *mask)
{
struct sw_flow *flow;
struct hlist_head *head;
- u8 *_key;
- int key_start;
+ int key_start = mask->range.start;
+ int key_len = mask->range.end;
u32 hash;
+ struct sw_flow_key masked_key;
- key_start = flow_key_start(key);
- hash = ovs_flow_hash(key, key_start, key_len);
-
- _key = (u8 *) key + key_start;
+ flow_key_mask(&masked_key, flow_key, mask);
+ hash = ovs_flow_hash(&masked_key, key_start, key_len);
head = find_bucket(table, hash);
hlist_for_each_entry_rcu(flow, head, hash_node[table->node_ver]) {
-
- if (flow->hash == hash &&
- !memcmp((u8 *)&flow->key + key_start, _key, key_len - key_start)) {
+ if (__flow_cmp_key(flow, &masked_key, key_start, key_len))
return flow;
- }
}
return NULL;
}
-void ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow,
- struct sw_flow_key *key, int key_len)
+struct sw_flow *ovs_flow_lookup(struct flow_table *tbl,
+ const struct sw_flow_key *key)
{
- flow->hash = ovs_flow_hash(key, flow_key_start(key), key_len);
- memcpy(&flow->key, key, sizeof(flow->key));
- __flow_tbl_insert(table, flow);
+ struct sw_flow *flow = NULL;
+ struct sw_flow_mask *mask;
+
+ list_for_each_entry_rcu(mask, &tbl->mask_list, list) {
+ flow = ovs_masked_flow_lookup(tbl, key, mask);
+ if (flow) /* Found */
+ break;
+ }
+
+ return flow;
}
-void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow)
+
+void ovs_flow_insert(struct flow_table *table, struct sw_flow *flow,
+ const struct sw_flow_key *key, int key_len)
+{
+ flow->unmasked_key = *key;
+ flow_key_mask(&flow->key, &flow->unmasked_key, ovsl_dereference(flow->mask));
+ flow->hash = ovs_flow_hash(&flow->key,
+ ovsl_dereference(flow->mask)->range.start,
+ ovsl_dereference(flow->mask)->range.end);
+ __tbl_insert(table, flow);
+}
+
+void ovs_flow_remove(struct flow_table *table, struct sw_flow *flow)
{
BUG_ON(table->count == 0);
hlist_del_rcu(&flow->hash_node[table->node_ver]);
[OVS_KEY_ATTR_TUNNEL] = -1,
};
-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)
+static bool is_all_zero(const u8 *fp, size_t size)
{
- 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;
+ int i;
- case IPPROTO_ICMPV6:
- if (!(*attrs & (1 << OVS_KEY_ATTR_ICMPV6)))
- return -EINVAL;
- *attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
+ if (!fp)
+ return false;
- *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;
- }
+ for (i = 0; i < size; i++)
+ if (fp[i])
+ return false;
- return 0;
+ return true;
}
-static int parse_flow_nlattrs(const struct nlattr *attr,
- const struct nlattr *a[], u64 *attrsp)
+static int __parse_flow_nlattrs(const struct nlattr *attr,
+ const struct nlattr *a[],
+ u64 *attrsp, bool nz)
{
const struct nlattr *nla;
u64 attrs;
int rem;
- attrs = 0;
+ attrs = *attrsp;
nla_for_each_nested(nla, attr, rem) {
u16 type = nla_type(nla);
int expected_len;
if (nla_len(nla) != expected_len && expected_len != -1)
return -EINVAL;
- attrs |= 1ULL << type;
- a[type] = nla;
+ if (attrs & (1ULL << type))
+ /* Duplicated field. */
+ return -EINVAL;
+
+ if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
+ attrs |= 1ULL << type;
+ a[type] = nla;
+ }
}
if (rem)
return -EINVAL;
return 0;
}
+static int parse_flow_mask_nlattrs(const struct nlattr *attr,
+ const struct nlattr *a[], u64 *attrsp)
+{
+ return __parse_flow_nlattrs(attr, a, attrsp, true);
+}
+
+static int parse_flow_nlattrs(const struct nlattr *attr,
+ const struct nlattr *a[], u64 *attrsp)
+{
+ return __parse_flow_nlattrs(attr, a, attrsp, false);
+}
+
int ipv4_tun_from_nlattr(const struct nlattr *attr,
- struct ovs_key_ipv4_tunnel *tun_key)
+ struct sw_flow_match *match, bool is_mask)
{
struct nlattr *a;
int rem;
bool ttl = false;
-
- memset(tun_key, 0, sizeof(*tun_key));
+ u16 tun_flags = 0;
nla_for_each_nested(a, attr, rem) {
int type = nla_type(a);
switch (type) {
case OVS_TUNNEL_KEY_ATTR_ID:
- tun_key->tun_id = nla_get_be64(a);
- tun_key->tun_flags |= OVS_TNL_F_KEY;
+ SW_FLOW_KEY_PUT(match, tun_key.tun_id,
+ nla_get_be64(a), is_mask);
+ tun_flags |= OVS_TNL_F_KEY;
break;
case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
- tun_key->ipv4_src = nla_get_be32(a);
+ SW_FLOW_KEY_PUT(match, tun_key.ipv4_src,
+ nla_get_be32(a), is_mask);
break;
case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
- tun_key->ipv4_dst = nla_get_be32(a);
+ SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst,
+ nla_get_be32(a), is_mask);
break;
case OVS_TUNNEL_KEY_ATTR_TOS:
- tun_key->ipv4_tos = nla_get_u8(a);
+ SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos,
+ nla_get_u8(a), is_mask);
break;
case OVS_TUNNEL_KEY_ATTR_TTL:
- tun_key->ipv4_ttl = nla_get_u8(a);
+ SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl,
+ nla_get_u8(a), is_mask);
ttl = true;
break;
case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
- tun_key->tun_flags |= OVS_TNL_F_DONT_FRAGMENT;
+ tun_flags |= OVS_TNL_F_DONT_FRAGMENT;
break;
case OVS_TUNNEL_KEY_ATTR_CSUM:
- tun_key->tun_flags |= OVS_TNL_F_CSUM;
+ tun_flags |= OVS_TNL_F_CSUM;
break;
default:
return -EINVAL;
-
}
}
+
+ SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
+
if (rem > 0)
return -EINVAL;
- if (!tun_key->ipv4_dst)
+ if (!match->key->tun_key.ipv4_dst)
return -EINVAL;
if (!ttl)
}
int ipv4_tun_to_nlattr(struct sk_buff *skb,
- const struct ovs_key_ipv4_tunnel *tun_key)
+ const struct ovs_key_ipv4_tunnel *tun_key,
+ const struct ovs_key_ipv4_tunnel *output)
{
struct nlattr *nla;
return -EMSGSIZE;
if (tun_key->tun_flags & OVS_TNL_F_KEY &&
- nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, tun_key->tun_id))
+ nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id))
return -EMSGSIZE;
if (tun_key->ipv4_src &&
- nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, tun_key->ipv4_src))
+ nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src))
return -EMSGSIZE;
- if (nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, tun_key->ipv4_dst))
+ if (nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst))
return -EMSGSIZE;
if (tun_key->ipv4_tos &&
- nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, tun_key->ipv4_tos))
+ nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos))
return -EMSGSIZE;
- if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, tun_key->ipv4_ttl))
+ if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl))
return -EMSGSIZE;
if ((tun_key->tun_flags & OVS_TNL_F_DONT_FRAGMENT) &&
nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
return 0;
}
-/**
- * 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.
- */
-int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
- const struct nlattr *attr)
-{
- 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(struct sw_flow_key));
- key_len = SW_FLOW_KEY_OFFSET(eth);
-
- err = parse_flow_nlattrs(attr, a, &attrs);
- if (err)
- return err;
- /* 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);
+static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs,
+ const struct nlattr **a, bool is_mask)
+{
+ if (*attrs & (1ULL << OVS_KEY_ATTR_PRIORITY)) {
+ SW_FLOW_KEY_PUT(match, phy.priority,
+ nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
+ *attrs &= ~(1ULL << OVS_KEY_ATTR_PRIORITY);
}
- if (attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
+
+ if (*attrs & (1ULL << OVS_KEY_ATTR_IN_PORT)) {
u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
- if (in_port >= DP_MAX_PORTS)
+
+ if (!is_mask && 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;
+ SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
+ *attrs &= ~(1ULL << OVS_KEY_ATTR_IN_PORT);
}
- if (attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
+
+ if (*attrs & (1ULL << OVS_KEY_ATTR_SKB_MARK)) {
uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) && !defined(CONFIG_NETFILTER)
- if (mark != 0)
+ if (!is_mask && mark != 0)
return -EINVAL;
#endif
- swkey->phy.skb_mark = mark;
- attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
+ SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
+ *attrs &= ~(1ULL << OVS_KEY_ATTR_SKB_MARK);
+ }
+ if (*attrs & (1ULL << OVS_KEY_ATTR_TUNNEL)) {
+ if (ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
+ is_mask))
+ return -EINVAL;
+ *attrs &= ~(1ULL << OVS_KEY_ATTR_TUNNEL);
}
+ return 0;
+}
- if (attrs & (1ULL << OVS_KEY_ATTR_TUNNEL)) {
- err = ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], &swkey->tun_key);
- if (err)
- return err;
+static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
+ const struct nlattr **a, bool is_mask)
+{
+ int err;
- attrs &= ~(1ULL << OVS_KEY_ATTR_TUNNEL);
- }
+ err = metadata_from_nlattrs(match, &attrs, a, is_mask);
+ if (err)
+ return err;
- /* Data attributes. */
- if (!(attrs & (1 << OVS_KEY_ATTR_ETHERNET)))
- return -EINVAL;
- attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
+ if (attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) {
+ const struct ovs_key_ethernet *eth_key;
- 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);
+ eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
+ SW_FLOW_KEY_MEMCPY(match, eth.src,
+ eth_key->eth_src, ETH_ALEN, is_mask);
+ SW_FLOW_KEY_MEMCPY(match, eth.dst,
+ eth_key->eth_dst, ETH_ALEN, is_mask);
+ attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERNET);
+ }
- if (attrs & (1u << OVS_KEY_ATTR_ETHERTYPE) &&
- nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q)) {
- const struct nlattr *encap;
+ if (attrs & (1ULL << OVS_KEY_ATTR_VLAN)) {
__be16 tci;
- if (attrs != ((1 << OVS_KEY_ATTR_VLAN) |
- (1 << OVS_KEY_ATTR_ETHERTYPE) |
- (1 << OVS_KEY_ATTR_ENCAP)))
+ tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
+ if (!is_mask && (tci & htons(VLAN_TAG_PRESENT)))
return -EINVAL;
- 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;
+ SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask);
+ attrs &= ~(1ULL << OVS_KEY_ATTR_VLAN);
+ }
- 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;
+ if (attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) {
+ __be16 eth_type;
- swkey->eth.type = htons(ETH_P_8021Q);
- *key_lenp = key_len;
- return 0;
- } else {
+ eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
+ if (!is_mask && ntohs(eth_type) < ETH_P_802_3_MIN)
return -EINVAL;
- }
+
+ SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
+ attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE);
+ } else if (!is_mask) {
+ SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
}
- if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
- swkey->eth.type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
- if (ntohs(swkey->eth.type) < ETH_P_802_3_MIN)
+ if (attrs & (1ULL << OVS_KEY_ATTR_IPV4)) {
+ const struct ovs_key_ipv4 *ipv4_key;
+
+ ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
+ if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX)
return -EINVAL;
- attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
- } else {
- swkey->eth.type = htons(ETH_P_802_2);
+ SW_FLOW_KEY_PUT(match, ip.proto,
+ ipv4_key->ipv4_proto, is_mask);
+ SW_FLOW_KEY_PUT(match, ip.tos,
+ ipv4_key->ipv4_tos, is_mask);
+ SW_FLOW_KEY_PUT(match, ip.ttl,
+ ipv4_key->ipv4_ttl, is_mask);
+ SW_FLOW_KEY_PUT(match, ip.frag,
+ ipv4_key->ipv4_frag, is_mask);
+ SW_FLOW_KEY_PUT(match, ipv4.addr.src,
+ ipv4_key->ipv4_src, is_mask);
+ SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
+ ipv4_key->ipv4_dst, is_mask);
+ attrs &= ~(1ULL << OVS_KEY_ATTR_IPV4);
}
- if (swkey->eth.type == htons(ETH_P_IP)) {
- const struct ovs_key_ipv4 *ipv4_key;
+ if (attrs & (1ULL << OVS_KEY_ATTR_IPV6)) {
+ const struct ovs_key_ipv6 *ipv6_key;
- if (!(attrs & (1 << OVS_KEY_ATTR_IPV4)))
+ ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
+ if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX)
return -EINVAL;
- attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
+ SW_FLOW_KEY_PUT(match, ipv6.label,
+ ipv6_key->ipv6_label, is_mask);
+ SW_FLOW_KEY_PUT(match, ip.proto,
+ ipv6_key->ipv6_proto, is_mask);
+ SW_FLOW_KEY_PUT(match, ip.tos,
+ ipv6_key->ipv6_tclass, is_mask);
+ SW_FLOW_KEY_PUT(match, ip.ttl,
+ ipv6_key->ipv6_hlimit, is_mask);
+ SW_FLOW_KEY_PUT(match, ip.frag,
+ ipv6_key->ipv6_frag, is_mask);
+ SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
+ ipv6_key->ipv6_src,
+ sizeof(match->key->ipv6.addr.src),
+ is_mask);
+ SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
+ ipv6_key->ipv6_dst,
+ sizeof(match->key->ipv6.addr.dst),
+ is_mask);
+
+ attrs &= ~(1ULL << OVS_KEY_ATTR_IPV6);
+ }
- 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)
+ if (attrs & (1ULL << OVS_KEY_ATTR_ARP)) {
+ const struct ovs_key_arp *arp_key;
+
+ arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
+ if (!is_mask && (arp_key->arp_op & htons(0xff00)))
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);
+
+ SW_FLOW_KEY_PUT(match, ipv4.addr.src,
+ arp_key->arp_sip, is_mask);
+ SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
+ arp_key->arp_tip, is_mask);
+ SW_FLOW_KEY_PUT(match, ip.proto,
+ ntohs(arp_key->arp_op), is_mask);
+ SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
+ arp_key->arp_sha, ETH_ALEN, is_mask);
+ SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
+ arp_key->arp_tha, ETH_ALEN, is_mask);
+
+ attrs &= ~(1ULL << OVS_KEY_ATTR_ARP);
+ }
+
+ if (attrs & (1ULL << OVS_KEY_ATTR_TCP)) {
+ const struct ovs_key_tcp *tcp_key;
+
+ tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
+ SW_FLOW_KEY_PUT(match, ipv4.tp.src,
+ tcp_key->tcp_src, is_mask);
+ SW_FLOW_KEY_PUT(match, ipv4.tp.dst,
+ tcp_key->tcp_dst, is_mask);
+ attrs &= ~(1ULL << OVS_KEY_ATTR_TCP);
+ }
+
+ if (attrs & (1ULL << OVS_KEY_ATTR_UDP)) {
+ const struct ovs_key_udp *udp_key;
+
+ udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
+ SW_FLOW_KEY_PUT(match, ipv4.tp.src,
+ udp_key->udp_src, is_mask);
+ SW_FLOW_KEY_PUT(match, ipv4.tp.dst,
+ udp_key->udp_dst, is_mask);
+ attrs &= ~(1ULL << OVS_KEY_ATTR_UDP);
+ }
+
+ if (attrs & (1ULL << OVS_KEY_ATTR_ICMP)) {
+ const struct ovs_key_icmp *icmp_key;
+
+ icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
+ SW_FLOW_KEY_PUT(match, ipv4.tp.src,
+ htons(icmp_key->icmp_type), is_mask);
+ SW_FLOW_KEY_PUT(match, ipv4.tp.dst,
+ htons(icmp_key->icmp_code), is_mask);
+ attrs &= ~(1ULL << OVS_KEY_ATTR_ICMP);
+ }
+
+ if (attrs & (1ULL << OVS_KEY_ATTR_ICMPV6)) {
+ const struct ovs_key_icmpv6 *icmpv6_key;
+
+ icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
+ SW_FLOW_KEY_PUT(match, ipv6.tp.src,
+ htons(icmpv6_key->icmpv6_type), is_mask);
+ SW_FLOW_KEY_PUT(match, ipv6.tp.dst,
+ htons(icmpv6_key->icmpv6_code), is_mask);
+ attrs &= ~(1ULL << OVS_KEY_ATTR_ICMPV6);
+ }
+
+ if (attrs & (1ULL << OVS_KEY_ATTR_ND)) {
+ const struct ovs_key_nd *nd_key;
+
+ nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
+ SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
+ nd_key->nd_target,
+ sizeof(match->key->ipv6.nd.target),
+ is_mask);
+ SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
+ nd_key->nd_sll, ETH_ALEN, is_mask);
+ SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
+ nd_key->nd_tll, ETH_ALEN, is_mask);
+ attrs &= ~(1ULL << OVS_KEY_ATTR_ND);
+ }
+
+ if (attrs != 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+/**
+ * ovs_match_from_nlattrs - parses Netlink attributes into a flow key and
+ * mask. In case the 'mask' is NULL, the flow is treated as exact match
+ * flow. Otherwise, it is treated as a wildcarded flow, except the mask
+ * does not include any don't care bit.
+ * @match: receives the extracted flow match information.
+ * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
+ * sequence. The fields should of the packet that triggered the creation
+ * of this flow.
+ * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
+ * attribute specifies the mask field of the wildcarded flow.
+ */
+int ovs_match_from_nlattrs(struct sw_flow_match *match,
+ const struct nlattr *key,
+ const struct nlattr *mask)
+{
+ const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
+ const struct nlattr *m[OVS_KEY_ATTR_MAX + 1];
+ const struct nlattr *encap;
+ u64 key_attrs = 0;
+ u64 mask_attrs = 0;
+ bool encap_valid = false;
+ int err;
+
+ err = parse_flow_nlattrs(key, a, &key_attrs);
+ if (err)
+ return err;
+
+ if (key_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) {
+ encap = a[OVS_KEY_ATTR_ENCAP];
+ key_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP);
+ if (nla_len(encap)) {
+ __be16 eth_type = 0; /* ETH_P_8021Q */
+
+ if (a[OVS_KEY_ATTR_ETHERTYPE])
+ eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
+
+ if ((eth_type == htons(ETH_P_8021Q)) && (a[OVS_KEY_ATTR_VLAN])) {
+ encap_valid = true;
+ key_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE);
+ err = parse_flow_nlattrs(encap, a, &key_attrs);
+ } else
+ err = -EINVAL;
+
if (err)
return err;
}
- } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
- const struct ovs_key_ipv6 *ipv6_key;
+ }
- if (!(attrs & (1 << OVS_KEY_ATTR_IPV6)))
- return -EINVAL;
- attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
+ err = ovs_key_from_nlattrs(match, key_attrs, a, false);
+ if (err)
+ return err;
+
+ if (mask) {
+ err = parse_flow_mask_nlattrs(mask, m, &mask_attrs);
+ if (err)
+ return err;
+
+ if ((mask_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) && encap_valid) {
+ __be16 eth_type = 0;
+
+ if (m[OVS_KEY_ATTR_ETHERTYPE])
+ eth_type = nla_get_be16(m[OVS_KEY_ATTR_ETHERTYPE]);
+ if (eth_type == htons(0xffff)) {
+ mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE);
+ encap = m[OVS_KEY_ATTR_ENCAP];
+ err = parse_flow_mask_nlattrs(encap, m, &mask_attrs);
+ } else
+ err = -EINVAL;
- 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) ||
- swkey->eth.type == htons(ETH_P_RARP)) {
- const struct ovs_key_arp *arp_key;
- if (!(attrs & (1 << OVS_KEY_ATTR_ARP)))
- return -EINVAL;
- attrs &= ~(1 << OVS_KEY_ATTR_ARP);
-
- 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);
+ err = ovs_key_from_nlattrs(match, mask_attrs, m, true);
+ if (err)
+ return err;
+ } else {
+ /* Populate exact match flow's key mask. */
+ if (match->mask)
+ ovs_sw_flow_mask_set(match->mask, &match->range, 0xff);
}
- if (attrs)
+ if (!ovs_match_validate(match, key_attrs, mask_attrs))
return -EINVAL;
- *key_lenp = key_len;
return 0;
}
/**
* ovs_flow_metadata_from_nlattrs - parses Netlink attributes into a flow key.
* @flow: Receives extracted in_port, priority, tun_key and skb_mark.
- * @key_len: Length of key in @flow. Used for calculating flow hash.
* @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
* sequence.
*
* extracted from the packet itself.
*/
-int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow, int key_len, const struct nlattr *attr)
+int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow,
+ const struct nlattr *attr)
{
struct ovs_key_ipv4_tunnel *tun_key = &flow->key.tun_key;
- const struct nlattr *nla;
- int rem;
+ const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
+ u64 attrs = 0;
+ int err;
+ struct sw_flow_match match;
flow->key.phy.in_port = DP_MAX_PORTS;
flow->key.phy.priority = 0;
flow->key.phy.skb_mark = 0;
memset(tun_key, 0, sizeof(flow->key.tun_key));
- nla_for_each_nested(nla, attr, rem) {
- int type = nla_type(nla);
-
- if (type <= OVS_KEY_ATTR_MAX && ovs_key_lens[type] > 0) {
- int err;
-
- if (nla_len(nla) != ovs_key_lens[type])
- return -EINVAL;
-
- switch (type) {
- case OVS_KEY_ATTR_PRIORITY:
- flow->key.phy.priority = nla_get_u32(nla);
- break;
-
- case OVS_KEY_ATTR_TUNNEL:
- err = ipv4_tun_from_nlattr(nla, tun_key);
- if (err)
- return err;
- break;
-
- case OVS_KEY_ATTR_IN_PORT:
- if (nla_get_u32(nla) >= DP_MAX_PORTS)
- return -EINVAL;
- flow->key.phy.in_port = nla_get_u32(nla);
- break;
-
- case OVS_KEY_ATTR_SKB_MARK:
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) && !defined(CONFIG_NETFILTER)
- if (nla_get_u32(nla) != 0)
- return -EINVAL;
-#endif
- flow->key.phy.skb_mark = nla_get_u32(nla);
- break;
- }
- }
- }
- if (rem)
+ err = parse_flow_nlattrs(attr, a, &attrs);
+ if (err)
return -EINVAL;
- flow->hash = ovs_flow_hash(&flow->key,
- flow_key_start(&flow->key), key_len);
+ ovs_match_init(&match, &flow->key, NULL);
+
+ err = metadata_from_nlattrs(&match, &attrs, a, false);
+ if (err)
+ return err;
return 0;
}
-int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey, struct sk_buff *skb)
+int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey,
+ const struct sw_flow_key *output, struct sk_buff *skb)
{
struct ovs_key_ethernet *eth_key;
struct nlattr *nla, *encap;
if (swkey->phy.priority &&
- nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, swkey->phy.priority))
+ nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
goto nla_put_failure;
if (swkey->tun_key.ipv4_dst &&
- ipv4_tun_to_nlattr(skb, &swkey->tun_key))
+ ipv4_tun_to_nlattr(skb, &swkey->tun_key, &output->tun_key))
goto nla_put_failure;
- 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;
+ if (swkey->phy.in_port != DP_MAX_PORTS) {
+ /* Exact match upper 16 bits. */
+ u16 upper_u16;
+ upper_u16 = (swkey == output) ? 0 : 0xffff;
+
+ if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
+ (upper_u16 << 16) | output->phy.in_port))
+ goto nla_put_failure;
+ }
if (swkey->phy.skb_mark &&
- nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, swkey->phy.skb_mark))
+ nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
goto nla_put_failure;
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);
+ memcpy(eth_key->eth_src, output->eth.src, ETH_ALEN);
+ memcpy(eth_key->eth_dst, output->eth.dst, ETH_ALEN);
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))
+ __be16 eth_type;
+ eth_type = (swkey == output) ? htons(ETH_P_8021Q) : htons(0xffff) ;
+ if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
+ nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci))
goto nla_put_failure;
encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
if (!swkey->eth.tci)
goto unencap;
- } else {
+ } else
encap = NULL;
- }
- if (swkey->eth.type == htons(ETH_P_802_2))
+ if ((swkey == output) && (swkey->eth.type == htons(ETH_P_802_2)))
goto unencap;
- if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, swkey->eth.type))
- goto nla_put_failure;
+ if (output->eth.type != 0)
+ if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->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);
- 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;
- ipv4_key->ipv4_ttl = swkey->ip.ttl;
- ipv4_key->ipv4_frag = swkey->ip.frag;
+ ipv4_key->ipv4_src = output->ipv4.addr.src;
+ ipv4_key->ipv4_dst = output->ipv4.addr.dst;
+ ipv4_key->ipv4_proto = output->ip.proto;
+ ipv4_key->ipv4_tos = output->ip.tos;
+ ipv4_key->ipv4_ttl = output->ip.ttl;
+ ipv4_key->ipv4_frag = output->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);
- memcpy(ipv6_key->ipv6_src, &swkey->ipv6.addr.src,
+ memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
sizeof(ipv6_key->ipv6_src));
- memcpy(ipv6_key->ipv6_dst, &swkey->ipv6.addr.dst,
+ memcpy(ipv6_key->ipv6_dst, &output->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_tclass = swkey->ip.tos;
- ipv6_key->ipv6_hlimit = swkey->ip.ttl;
- ipv6_key->ipv6_frag = swkey->ip.frag;
+ ipv6_key->ipv6_label = output->ipv6.label;
+ ipv6_key->ipv6_proto = output->ip.proto;
+ ipv6_key->ipv6_tclass = output->ip.tos;
+ ipv6_key->ipv6_hlimit = output->ip.ttl;
+ ipv6_key->ipv6_frag = output->ip.frag;
} else if (swkey->eth.type == htons(ETH_P_ARP) ||
swkey->eth.type == htons(ETH_P_RARP)) {
struct ovs_key_arp *arp_key;
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);
+ arp_key->arp_sip = output->ipv4.addr.src;
+ arp_key->arp_tip = output->ipv4.addr.dst;
+ arp_key->arp_op = htons(output->ip.proto);
+ memcpy(arp_key->arp_sha, output->ipv4.arp.sha, ETH_ALEN);
+ memcpy(arp_key->arp_tha, output->ipv4.arp.tha, ETH_ALEN);
}
if ((swkey->eth.type == htons(ETH_P_IP) ||
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;
+ tcp_key->tcp_src = output->ipv4.tp.src;
+ tcp_key->tcp_dst = output->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;
+ tcp_key->tcp_src = output->ipv6.tp.src;
+ tcp_key->tcp_dst = output->ipv6.tp.dst;
}
} else if (swkey->ip.proto == IPPROTO_UDP) {
struct ovs_key_udp *udp_key;
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;
+ udp_key->udp_src = output->ipv4.tp.src;
+ udp_key->udp_dst = output->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;
+ udp_key->udp_src = output->ipv6.tp.src;
+ udp_key->udp_dst = output->ipv6.tp.dst;
}
} else if (swkey->eth.type == htons(ETH_P_IP) &&
swkey->ip.proto == IPPROTO_ICMP) {
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);
+ icmp_key->icmp_type = ntohs(output->ipv4.tp.src);
+ icmp_key->icmp_code = ntohs(output->ipv4.tp.dst);
} else if (swkey->eth.type == htons(ETH_P_IPV6) &&
swkey->ip.proto == IPPROTO_ICMPV6) {
struct ovs_key_icmpv6 *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);
+ icmpv6_key->icmpv6_type = ntohs(output->ipv6.tp.src);
+ icmpv6_key->icmpv6_code = ntohs(output->ipv6.tp.dst);
if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
if (!nla)
goto nla_put_failure;
nd_key = nla_data(nla);
- memcpy(nd_key->nd_target, &swkey->ipv6.nd.target,
+ memcpy(nd_key->nd_target, &output->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);
+ memcpy(nd_key->nd_sll, output->ipv6.nd.sll, ETH_ALEN);
+ memcpy(nd_key->nd_tll, output->ipv6.nd.tll, ETH_ALEN);
}
}
}
{
kmem_cache_destroy(flow_cache);
}
+
+struct sw_flow_mask *ovs_sw_flow_mask_alloc(void)
+{
+ struct sw_flow_mask *mask;
+
+ mask = kmalloc(sizeof(*mask), GFP_KERNEL);
+ if (mask)
+ mask->ref_count = 0;
+
+ return mask;
+}
+
+void ovs_sw_flow_mask_add_ref(struct sw_flow_mask *mask)
+{
+ mask->ref_count++;
+}
+
+static void rcu_free_sw_flow_mask_cb(struct rcu_head *rcu)
+{
+ struct sw_flow_mask *mask = container_of(rcu, struct sw_flow_mask, rcu);
+
+ kfree(mask);
+}
+
+void ovs_sw_flow_mask_del_ref(struct sw_flow_mask *mask, bool deferred)
+{
+ if (!mask)
+ return;
+
+ BUG_ON(!mask->ref_count);
+ mask->ref_count--;
+
+ if (!mask->ref_count) {
+ list_del_rcu(&mask->list);
+ if (deferred)
+ call_rcu(&mask->rcu, rcu_free_sw_flow_mask_cb);
+ else
+ kfree(mask);
+ }
+}
+
+static bool ovs_sw_flow_mask_equal(const struct sw_flow_mask *a,
+ const struct sw_flow_mask *b)
+{
+ u8 *a_ = (u8 *)&a->key + a->range.start;
+ u8 *b_ = (u8 *)&b->key + b->range.start;
+
+ return (a->range.end == b->range.end)
+ && (a->range.start == b->range.start)
+ && (memcmp(a_, b_, ovs_sw_flow_mask_actual_size(a)) == 0);
+}
+
+struct sw_flow_mask *ovs_sw_flow_mask_find(const struct flow_table *tbl,
+ const struct sw_flow_mask *mask)
+{
+ struct list_head *ml;
+
+ list_for_each(ml, &tbl->mask_list) {
+ struct sw_flow_mask *m;
+ m = container_of(ml, struct sw_flow_mask, list);
+ if (ovs_sw_flow_mask_equal(mask, m))
+ return m;
+ }
+
+ return NULL;
+}
+
+/**
+ * add a new mask into the mask list.
+ * The caller needs to make sure that 'mask' is not the same
+ * as any masks that are already on the list.
+ */
+void ovs_sw_flow_mask_insert(struct flow_table *tbl, struct sw_flow_mask *mask)
+{
+ list_add_rcu(&mask->list, &tbl->mask_list);
+}
+
+/**
+ * Set 'range' fields in the mask to the value of 'val'.
+ */
+static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask,
+ struct sw_flow_key_range *range, u8 val)
+{
+ u8 *m = (u8 *)&mask->key + range->start;
+
+ mask->range = *range;
+ memset(m, val, ovs_sw_flow_mask_size_roundup(mask));
+}
git://git.onelab.eu / sliver-openvswitch.git / commitdiff