+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;
+ int key_start = mask->range.start;
+ int key_len = mask->range.end;
+ u32 hash;
+ struct sw_flow_key masked_key;
+
+ 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_cmp_key(flow, &masked_key, key_start, key_len))
+ return flow;
+ }
+ return NULL;
+}
+
+struct sw_flow *ovs_flow_lookup(struct flow_table *tbl,
+ const struct sw_flow_key *key)
+{
+ 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_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]);
+ table->count--;
+}
+
+/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
+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_SKB_MARK] = sizeof(u32),
+ [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet),
+ [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_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),
+ [OVS_KEY_ATTR_TUNNEL] = -1,
+};
+
+static bool is_all_zero(const u8 *fp, size_t size)
+{
+ int i;
+
+ if (!fp)
+ return false;
+
+ for (i = 0; i < size; i++)
+ if (fp[i])
+ return false;
+
+ return true;
+}
+
+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 = *attrsp;
+ nla_for_each_nested(nla, attr, rem) {
+ u16 type = nla_type(nla);
+ int expected_len;
+
+ if (type > OVS_KEY_ATTR_MAX) {
+ OVS_NLERR("Unknown key attribute (type=%d, max=%d).\n",
+ type, OVS_KEY_ATTR_MAX);
+ }
+
+ if (attrs & (1ULL << type)) {
+ OVS_NLERR("Duplicate key attribute (type %d).\n", type);
+ return -EINVAL;
+ }
+
+ expected_len = ovs_key_lens[type];
+ if (nla_len(nla) != expected_len && expected_len != -1) {
+ OVS_NLERR("Key attribute has unexpected length (type=%d"
+ ", length=%d, expected=%d).\n", type,
+ nla_len(nla), expected_len);
+ return -EINVAL;
+ }
+
+ if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
+ attrs |= 1ULL << type;
+ a[type] = nla;
+ }
+ }
+ if (rem) {
+ OVS_NLERR("Message has %d unknown bytes.\n", rem);
+ return -EINVAL;
+ }
+
+ *attrsp = attrs;
+ 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 sw_flow_match *match, bool is_mask)
+{
+ struct nlattr *a;
+ int rem;
+ bool ttl = false;
+ __be16 tun_flags = 0;
+
+ nla_for_each_nested(a, attr, rem) {
+ int type = nla_type(a);
+ static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
+ [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64),
+ [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32),
+ [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32),
+ [OVS_TUNNEL_KEY_ATTR_TOS] = 1,
+ [OVS_TUNNEL_KEY_ATTR_TTL] = 1,
+ [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0,
+ [OVS_TUNNEL_KEY_ATTR_CSUM] = 0,
+ };
+
+ if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
+ OVS_NLERR("Unknown IPv4 tunnel attribute (type=%d, max=%d).\n",
+ type, OVS_TUNNEL_KEY_ATTR_MAX);
+ return -EINVAL;
+ }
+
+ if (ovs_tunnel_key_lens[type] != nla_len(a)) {
+ OVS_NLERR("IPv4 tunnel attribute type has unexpected "
+ " legnth (type=%d, length=%d, expected=%d).\n",
+ type, nla_len(a), ovs_tunnel_key_lens[type]);
+ return -EINVAL;
+ }
+
+ switch (type) {
+ case OVS_TUNNEL_KEY_ATTR_ID:
+ SW_FLOW_KEY_PUT(match, tun_key.tun_id,
+ nla_get_be64(a), is_mask);
+ tun_flags |= TUNNEL_KEY;
+ break;
+ case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
+ SW_FLOW_KEY_PUT(match, tun_key.ipv4_src,
+ nla_get_be32(a), is_mask);
+ break;
+ case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
+ SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst,
+ nla_get_be32(a), is_mask);
+ break;
+ case OVS_TUNNEL_KEY_ATTR_TOS:
+ SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos,
+ nla_get_u8(a), is_mask);
+ break;
+ case OVS_TUNNEL_KEY_ATTR_TTL:
+ 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_flags |= TUNNEL_DONT_FRAGMENT;
+ break;
+ case OVS_TUNNEL_KEY_ATTR_CSUM:
+ tun_flags |= TUNNEL_CSUM;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
+
+ if (rem > 0) {
+ OVS_NLERR("IPv4 tunnel attribute has %d unknown bytes.\n", rem);
+ return -EINVAL;
+ }
+
+ if (!match->key->tun_key.ipv4_dst) {
+ OVS_NLERR("IPv4 tunnel destination address is zero.\n");
+ return -EINVAL;
+ }
+
+ if (!ttl) {
+ OVS_NLERR("IPv4 tunnel TTL is zero.\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int ipv4_tun_to_nlattr(struct sk_buff *skb,
+ const struct ovs_key_ipv4_tunnel *tun_key,
+ const struct ovs_key_ipv4_tunnel *output)
+{
+ struct nlattr *nla;
+
+ nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
+ if (!nla)
+ return -EMSGSIZE;
+
+ if (output->tun_flags & TUNNEL_KEY &&
+ nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id))
+ return -EMSGSIZE;
+ if (output->ipv4_src &&
+ nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src))
+ return -EMSGSIZE;
+ if (output->ipv4_dst &&
+ nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst))
+ return -EMSGSIZE;
+ if (output->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, output->ipv4_ttl))
+ return -EMSGSIZE;
+ if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
+ nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
+ return -EMSGSIZE;
+ if ((output->tun_flags & TUNNEL_CSUM) &&
+ nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
+ return -EMSGSIZE;
+
+ nla_nest_end(skb, nla);
+ return 0;
+}
+
+
+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 & (1ULL << OVS_KEY_ATTR_IN_PORT)) {
+ u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
+
+ if (!is_mask && in_port >= DP_MAX_PORTS)
+ return -EINVAL;
+ SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
+ *attrs &= ~(1ULL << OVS_KEY_ATTR_IN_PORT);
+ } else if (!is_mask) {
+ SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
+ }
+
+ 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 (!is_mask && mark != 0) {
+ OVS_NLERR("skb->mark must be zero on this kernel (mark=%d).\n", mark);
+ return -EINVAL;
+ }
+#endif
+ 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;
+}
+
+static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
+ const struct nlattr **a, bool is_mask)
+{
+ int err;
+ u64 orig_attrs = attrs;
+
+ err = metadata_from_nlattrs(match, &attrs, a, is_mask);
+ if (err)
+ return err;
+
+ if (attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) {
+ const struct ovs_key_ethernet *eth_key;
+
+ 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 & (1ULL << OVS_KEY_ATTR_VLAN)) {
+ __be16 tci;
+
+ tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
+ if (!is_mask)
+ if (!(tci & htons(VLAN_TAG_PRESENT))) {
+ OVS_NLERR("VLAN TCI does not have VLAN_TAG_PRESENT bit set.\n");
+ return -EINVAL;
+ }
+
+ SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask);
+ attrs &= ~(1ULL << OVS_KEY_ATTR_VLAN);
+ }
+
+ if (attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) {
+ __be16 eth_type;
+
+ eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
+ if (!is_mask && ntohs(eth_type) < ETH_P_802_3_MIN) {
+ OVS_NLERR("EtherType is less than mimimum (type=%x, min=%x).\n",
+ 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 & (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) {
+ OVS_NLERR("Unknown IPv4 fragment type (value=%d, max=%d).\n",
+ ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
+ return -EINVAL;
+ }
+ 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 (attrs & (1ULL << OVS_KEY_ATTR_IPV6)) {
+ const struct ovs_key_ipv6 *ipv6_key;
+
+ ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
+ if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
+ OVS_NLERR("Unknown IPv6 fragment type (value=%d, max=%d).\n",
+ ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
+ return -EINVAL;
+ }
+ 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);
+ }
+
+ 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))) {
+ OVS_NLERR("Unknown ARP opcode (opcode=%d).\n",
+ arp_key->arp_op);
+ return -EINVAL;
+ }
+
+ 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]);
+ if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) {
+ 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);
+ } else {
+ SW_FLOW_KEY_PUT(match, ipv6.tp.src,
+ tcp_key->tcp_src, is_mask);
+ SW_FLOW_KEY_PUT(match, ipv6.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]);
+ if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) {
+ 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);
+ } else {
+ SW_FLOW_KEY_PUT(match, ipv6.tp.src,
+ udp_key->udp_src, is_mask);
+ SW_FLOW_KEY_PUT(match, ipv6.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 *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 {
+ OVS_NLERR("Encap attribute is set for a non-VLAN frame.\n");
+ err = -EINVAL;
+ }
+
+ if (err)
+ return err;
+ }
+ }
+
+ err = ovs_key_from_nlattrs(match, key_attrs, a, false);
+ if (err)
+ return err;
+
+ if (mask) {
+ err = parse_flow_mask_nlattrs(mask, a, &mask_attrs);
+ if (err)
+ return err;
+
+ if ((mask_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) && encap_valid) {
+ __be16 eth_type = 0;
+
+ mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP);
+ if (a[OVS_KEY_ATTR_ETHERTYPE])
+ eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
+ if (eth_type == htons(0xffff)) {
+ mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE);
+ encap = a[OVS_KEY_ATTR_ENCAP];
+ err = parse_flow_mask_nlattrs(encap, a, &mask_attrs);
+ } else {
+ OVS_NLERR("VLAN frames must have an exact match"
+ " on the TPID (mask=%x).\n",
+ ntohs(eth_type));
+ err = -EINVAL;
+ }
+
+ if (err)
+ return err;
+ }
+
+ err = ovs_key_from_nlattrs(match, mask_attrs, a, 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 (!ovs_match_validate(match, key_attrs, mask_attrs))
+ return -EINVAL;
+
+ 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.
+ * @attr: 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 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 *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));
+
+ err = parse_flow_nlattrs(attr, a, &attrs);
+ if (err)
+ return -EINVAL;
+
+ memset(&match, 0, sizeof(match));
+ match.key = &flow->key;
+
+ 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,
+ const struct sw_flow_key *output, struct sk_buff *skb)
+{
+ struct ovs_key_ethernet *eth_key;
+ struct nlattr *nla, *encap;
+
+ if (output->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, &output->tun_key))
+ goto nla_put_failure;
+
+ if (swkey->phy.in_port == DP_MAX_PORTS) {
+ if ((swkey != output) && (output->phy.in_port == 0xffff))
+ if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
+ goto nla_put_failure;
+ } else {
+ 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 (output->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, 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)) {
+ __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
+ encap = NULL;
+
+ if (swkey->eth.type == htons(ETH_P_802_2)) {
+ /*
+ * Ethertype 802.2 is represented in the netlink with omitted
+ * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
+ * 0xffff in the mask attribute. Ethertype can also
+ * be wildcarded.
+ */
+ if (swkey != output && output->eth.type)
+ if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
+ output->eth.type))
+ goto nla_put_failure;
+ goto unencap;
+ }
+
+ 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;
+
+ nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
+ if (!nla)
+ goto nla_put_failure;
+ ipv4_key = nla_data(nla);
+ 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;
+
+ nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
+ if (!nla)
+ goto nla_put_failure;
+ ipv6_key = nla_data(nla);
+ memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
+ sizeof(ipv6_key->ipv6_src));
+ memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
+ sizeof(ipv6_key->ipv6_dst));
+ 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;
+
+ 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 = 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) ||
+ swkey->eth.type == htons(ETH_P_IPV6)) &&
+ swkey->ip.frag != 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 = 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 = 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;
+
+ 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 = 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 = 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) {
+ 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(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;
+
+ 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(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) {
+ 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, &output->ipv6.nd.target,
+ sizeof(nd_key->nd_target));
+ memcpy(nd_key->nd_sll, output->ipv6.nd.sll, ETH_ALEN);
+ memcpy(nd_key->nd_tll, output->ipv6.nd.tll, ETH_ALEN);
+ }
+ }
+ }
+
+unencap:
+ if (encap)
+ nla_nest_end(skb, encap);
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;