[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;
+}
+
/**
* flow_from_nlattrs - parses Netlink attributes into a flow key.
* @swkey: receives the extracted flow key.
* @key_lenp: number of bytes used in @swkey.
* @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
* sequence.
- *
- * This state machine accepts the following forms, with [] for optional
- * elements and | for alternatives:
- *
- * [priority] [tun_id] [in_port] ethernet [8021q] [ethertype \
- * [IPv4 [TCP|UDP|ICMP] | IPv6 [TCP|UDP|ICMPv6 [ND]] | ARP]]
- *
- * except that IPv4 or IPv6 terminates the sequence if its @ipv4_frag or
- * @ipv6_frag member, respectively, equals %OVS_FRAG_TYPE_LATER.
*/
int flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
const struct nlattr *attr)
{
- int error = 0;
+ const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
+ const struct ovs_key_ethernet *eth_key;
const struct nlattr *nla;
- u16 prev_type;
- int rem;
int key_len;
+ u64 attrs;
+ int rem;
- memset(swkey, 0, sizeof(*swkey));
- swkey->phy.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;
+ attrs = 0;
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);
+ u16 type = nla_type(nla);
- if (type > OVS_KEY_ATTR_MAX ||
+ if (type > OVS_KEY_ATTR_MAX || attrs & (1ULL << type) ||
nla_len(nla) != ovs_key_lens[type])
- goto invalid;
-
-#define TRANSITION(PREV_TYPE, TYPE) (((PREV_TYPE) << 16) | (TYPE))
- switch (TRANSITION(prev_type, type)) {
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_PRIORITY):
- swkey->phy.priority = nla_get_u32(nla);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_TUN_ID):
- case TRANSITION(OVS_KEY_ATTR_PRIORITY, OVS_KEY_ATTR_TUN_ID):
- swkey->phy.tun_id = nla_get_be64(nla);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_IN_PORT):
- case TRANSITION(OVS_KEY_ATTR_PRIORITY, OVS_KEY_ATTR_IN_PORT):
- case TRANSITION(OVS_KEY_ATTR_TUN_ID, OVS_KEY_ATTR_IN_PORT):
- if (nla_get_u32(nla) >= DP_MAX_PORTS)
- goto invalid;
- swkey->phy.in_port = nla_get_u32(nla);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_ETHERNET):
- case TRANSITION(OVS_KEY_ATTR_PRIORITY, OVS_KEY_ATTR_ETHERNET):
- case TRANSITION(OVS_KEY_ATTR_TUN_ID, OVS_KEY_ATTR_ETHERNET):
- case TRANSITION(OVS_KEY_ATTR_IN_PORT, OVS_KEY_ATTR_ETHERNET):
- eth_key = nla_data(nla);
- memcpy(swkey->eth.src, eth_key->eth_src, ETH_ALEN);
- memcpy(swkey->eth.dst, eth_key->eth_dst, ETH_ALEN);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_ETHERNET, OVS_KEY_ATTR_8021Q):
- q_key = nla_data(nla);
- /* Only standard 0x8100 VLANs currently supported. */
- if (q_key->q_tpid != htons(ETH_P_8021Q))
- goto invalid;
- if (q_key->q_tci & htons(VLAN_TAG_PRESENT))
- goto invalid;
- swkey->eth.tci = q_key->q_tci | htons(VLAN_TAG_PRESENT);
- break;
+ return -EINVAL;
+ attrs |= 1ULL << type;
+ a[type] = nla;
+ }
+ if (rem)
+ return -EINVAL;
- 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;
+ /* 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 = USHRT_MAX;
+ }
- 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);
- if (ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX)
- goto invalid;
- 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;
- break;
-
- case TRANSITION(OVS_KEY_ATTR_ETHERTYPE, OVS_KEY_ATTR_IPV6):
- key_len = SW_FLOW_KEY_OFFSET(ipv6.label);
- if (swkey->eth.type != htons(ETH_P_IPV6))
- goto invalid;
- ipv6_key = nla_data(nla);
- if (ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX)
- goto invalid;
- 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));
- break;
-
- case TRANSITION(OVS_KEY_ATTR_IPV4, OVS_KEY_ATTR_TCP):
- key_len = SW_FLOW_KEY_OFFSET(ipv4.tp);
- if (swkey->ip.proto != IPPROTO_TCP)
- goto invalid;
- tcp_key = nla_data(nla);
- swkey->ipv4.tp.src = tcp_key->tcp_src;
- swkey->ipv4.tp.dst = tcp_key->tcp_dst;
- break;
+ 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_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;
+ /* Data attributes. */
+ if (!(attrs & (1 << OVS_KEY_ATTR_ETHERNET)))
+ return -EINVAL;
+ attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
- 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;
+ 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_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 (attrs & (1 << OVS_KEY_ATTR_8021Q)) {
+ const struct ovs_key_8021q *q_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;
+ q_key = nla_data(a[OVS_KEY_ATTR_8021Q]);
+ /* Only standard 0x8100 VLANs currently supported. */
+ if (q_key->q_tpid != htons(ETH_P_8021Q))
+ return -EINVAL;
+ if (q_key->q_tci & htons(VLAN_TAG_PRESENT))
+ return -EINVAL;
+ swkey->eth.tci = q_key->q_tci | htons(VLAN_TAG_PRESENT);
- 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;
+ attrs &= ~(1 << OVS_KEY_ATTR_8021Q);
+ }
- 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_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);
+ }
+
+ if (swkey->eth.type == htons(ETH_P_IP)) {
+ const struct ovs_key_ipv4 *ipv4_key;
- default:
- goto invalid;
+ if (!(attrs & (1 << OVS_KEY_ATTR_IPV4)))
+ return -EINVAL;
+ attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
+
+ 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) {
+ int 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;
- prev_type = type;
- }
- if (rem)
- goto invalid;
-
- switch (prev_type) {
- case OVS_KEY_ATTR_UNSPEC:
- goto invalid;
-
- case OVS_KEY_ATTR_PRIORITY:
- case OVS_KEY_ATTR_TUN_ID:
- case OVS_KEY_ATTR_IN_PORT:
- goto invalid;
-
- case OVS_KEY_ATTR_ETHERNET:
- case OVS_KEY_ATTR_8021Q:
- goto ok;
-
- case OVS_KEY_ATTR_ETHERTYPE:
- if (swkey->eth.type == htons(ETH_P_IP) ||
- swkey->eth.type == htons(ETH_P_IPV6) ||
- swkey->eth.type == htons(ETH_P_ARP))
- goto invalid;
- goto ok;
-
- case OVS_KEY_ATTR_IPV4:
- if (swkey->ip.frag == 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 (swkey->ip.frag == 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) ||
- swkey->ip.frag == 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 (swkey->ip.frag == 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_IPV6)))
+ return -EINVAL;
+ attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
+
+ 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) {
+ int 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;
-invalid:
- error = -EINVAL;
+ 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);
+ }
-ok:
+ if (attrs)
+ return -EINVAL;
*key_lenp = key_len;
- return error;
+
+ return 0;
}
/**
#include "packets.h"
#include "timeval.h"
#include "util.h"
+#include "vlog.h"
+
+VLOG_DEFINE_THIS_MODULE(odp_util);
/* The interface between userspace and kernel uses an "OVS_*" prefix.
* Since this is fairly non-specific for the OVS userspace components,
*
* On success, the attributes appended to 'key' are individually syntactically
* valid, but they may not be valid as a sequence. 'key' might, for example,
- * be missing an "in_port" key, have duplicated keys, or have keys in the wrong
- * order. odp_flow_key_to_flow() will detect those errors. */
+ * have duplicated keys. odp_flow_key_to_flow() will detect those errors. */
int
odp_flow_key_from_string(const char *s, struct ofpbuf *key)
{
}
}
+static void
+log_odp_key_attributes(struct vlog_rate_limit *rl, const char *title,
+ uint32_t attrs,
+ const struct nlattr *key, size_t key_len)
+{
+ struct ds s;
+ int i;
+
+ if (VLOG_DROP_WARN(rl)) {
+ return;
+ }
+
+ ds_init(&s);
+ ds_put_format(&s, "%s:", title);
+ for (i = 0; i < 32; i++) {
+ if (attrs & (1u << i)) {
+ ds_put_format(&s, " %s", ovs_key_attr_to_string(i));
+ }
+ }
+
+ ds_put_cstr(&s, ": ");
+ odp_flow_key_format(key, key_len, &s);
+
+ VLOG_WARN("%s", ds_cstr(&s));
+ ds_destroy(&s);
+}
+
static bool
odp_to_ovs_frag(uint8_t odp_frag, struct flow *flow)
{
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
+
if (odp_frag > OVS_FRAG_TYPE_LATER) {
+ VLOG_ERR_RL(&rl, "invalid frag %"PRIu8" in flow key",
+ odp_frag);
return false;
}
odp_flow_key_to_flow(const struct nlattr *key, size_t key_len,
struct flow *flow)
{
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
+ const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1];
const struct nlattr *nla;
- enum ovs_key_attr prev_type;
+ uint64_t expected_attrs;
+ uint64_t present_attrs;
+ uint64_t missing_attrs;
+ uint64_t extra_attrs;
size_t left;
memset(flow, 0, sizeof *flow);
- flow->dl_type = htons(FLOW_DL_TYPE_NONE);
- flow->in_port = OFPP_NONE;
- prev_type = OVS_KEY_ATTR_UNSPEC;
+ memset(attrs, 0, sizeof attrs);
+
+ present_attrs = 0;
+ expected_attrs = 0;
NL_ATTR_FOR_EACH (nla, left, key, key_len) {
+ uint16_t type = nl_attr_type(nla);
+ size_t len = nl_attr_get_size(nla);
+ int expected_len = odp_flow_key_attr_len(type);
+
+ if (len != expected_len) {
+ if (expected_len == -1) {
+ VLOG_ERR_RL(&rl, "unknown attribute %"PRIu16" in flow key",
+ type);
+ } else {
+ VLOG_ERR_RL(&rl, "attribute %s has length %zu but should have "
+ "length %d", ovs_key_attr_to_string(type),
+ len, expected_len);
+ }
+ return EINVAL;
+ } else if (present_attrs & (UINT64_C(1) << type)) {
+ VLOG_ERR_RL(&rl, "duplicate %s attribute in flow key",
+ ovs_key_attr_to_string(type));
+ return EINVAL;
+ }
+
+ present_attrs |= UINT64_C(1) << type;
+ attrs[type] = nla;
+ }
+ if (left) {
+ VLOG_ERR_RL(&rl, "trailing garbage in flow key");
+ return EINVAL;
+ }
+
+ if (attrs[OVS_KEY_ATTR_PRIORITY]) {
+ flow->priority = nl_attr_get_u32(attrs[OVS_KEY_ATTR_PRIORITY]);
+ expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_PRIORITY;
+ }
+
+ if (attrs[OVS_KEY_ATTR_TUN_ID]) {
+ flow->tun_id = nl_attr_get_be64(attrs[OVS_KEY_ATTR_TUN_ID]);
+ expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_TUN_ID;
+ }
+
+ if (attrs[OVS_KEY_ATTR_IN_PORT]) {
+ uint32_t in_port = nl_attr_get_u32(attrs[OVS_KEY_ATTR_IN_PORT]);
+ if (in_port >= UINT16_MAX || in_port >= OFPP_MAX) {
+ VLOG_ERR_RL(&rl, "in_port %"PRIu32" out of supported range",
+ in_port);
+ return EINVAL;
+ }
+ flow->in_port = odp_port_to_ofp_port(in_port);
+ expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_IN_PORT;
+ } else {
+ flow->in_port = OFPP_NONE;
+ }
+
+ if (attrs[OVS_KEY_ATTR_ETHERNET]) {
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;
- uint16_t type = nl_attr_type(nla);
- int len = odp_flow_key_attr_len(type);
+ eth_key = nl_attr_get(attrs[OVS_KEY_ATTR_ETHERNET]);
+ memcpy(flow->dl_src, eth_key->eth_src, ETH_ADDR_LEN);
+ memcpy(flow->dl_dst, eth_key->eth_dst, ETH_ADDR_LEN);
+ } else {
+ VLOG_ERR_RL(&rl, "missing Ethernet attribute in flow key");
+ return EINVAL;
+ }
+ expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ETHERNET;
+
+ if (attrs[OVS_KEY_ATTR_8021Q]) {
+ const struct ovs_key_8021q *q_key;
- if (nl_attr_get_size(nla) != len && len != -1) {
+ q_key = nl_attr_get(attrs[OVS_KEY_ATTR_8021Q]);
+ if (q_key->q_tpid != htons(ETH_TYPE_VLAN)) {
+ VLOG_ERR_RL(&rl, "unsupported 802.1Q TPID %"PRIu16" in flow key",
+ ntohs(q_key->q_tpid));
+ return EINVAL;
+ }
+ if (q_key->q_tci & htons(VLAN_CFI)) {
+ VLOG_ERR_RL(&rl, "invalid 802.1Q TCI %"PRIu16" in flow key",
+ ntohs(q_key->q_tci));
return EINVAL;
}
+ flow->vlan_tci = q_key->q_tci | htons(VLAN_CFI);
+ expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_8021Q;
+ }
-#define TRANSITION(PREV_TYPE, TYPE) (((PREV_TYPE) << 16) | (TYPE))
- switch (TRANSITION(prev_type, type)) {
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_PRIORITY):
- flow->priority = nl_attr_get_u32(nla);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_TUN_ID):
- case TRANSITION(OVS_KEY_ATTR_PRIORITY, OVS_KEY_ATTR_TUN_ID):
- flow->tun_id = nl_attr_get_be64(nla);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_IN_PORT):
- case TRANSITION(OVS_KEY_ATTR_PRIORITY, OVS_KEY_ATTR_IN_PORT):
- case TRANSITION(OVS_KEY_ATTR_TUN_ID, OVS_KEY_ATTR_IN_PORT):
- if (nl_attr_get_u32(nla) >= UINT16_MAX) {
- return EINVAL;
- }
- flow->in_port = odp_port_to_ofp_port(nl_attr_get_u32(nla));
- break;
-
- case TRANSITION(OVS_KEY_ATTR_UNSPEC, OVS_KEY_ATTR_ETHERNET):
- case TRANSITION(OVS_KEY_ATTR_PRIORITY, OVS_KEY_ATTR_ETHERNET):
- case TRANSITION(OVS_KEY_ATTR_TUN_ID, OVS_KEY_ATTR_ETHERNET):
- case TRANSITION(OVS_KEY_ATTR_IN_PORT, OVS_KEY_ATTR_ETHERNET):
- eth_key = nl_attr_get(nla);
- memcpy(flow->dl_src, eth_key->eth_src, ETH_ADDR_LEN);
- memcpy(flow->dl_dst, eth_key->eth_dst, ETH_ADDR_LEN);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_ETHERNET, OVS_KEY_ATTR_8021Q):
- q_key = nl_attr_get(nla);
- if (q_key->q_tpid != htons(ETH_TYPE_VLAN)) {
- /* Only standard 0x8100 VLANs currently supported. */
- return EINVAL;
- }
- if (q_key->q_tci & htons(VLAN_CFI)) {
- return EINVAL;
- }
- flow->vlan_tci = q_key->q_tci | htons(VLAN_CFI);
- break;
+ if (attrs[OVS_KEY_ATTR_ETHERTYPE]) {
+ flow->dl_type = nl_attr_get_be16(attrs[OVS_KEY_ATTR_ETHERTYPE]);
+ if (ntohs(flow->dl_type) < 1536) {
+ VLOG_ERR_RL(&rl, "invalid Ethertype %"PRIu16" in flow key",
+ ntohs(flow->dl_type));
+ return EINVAL;
+ }
+ expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ETHERTYPE;
+ } else {
+ flow->dl_type = htons(FLOW_DL_TYPE_NONE);
+ }
- case TRANSITION(OVS_KEY_ATTR_8021Q, OVS_KEY_ATTR_ETHERTYPE):
- case TRANSITION(OVS_KEY_ATTR_ETHERNET, OVS_KEY_ATTR_ETHERTYPE):
- flow->dl_type = nl_attr_get_be16(nla);
- if (ntohs(flow->dl_type) < 1536) {
- return EINVAL;
- }
- break;
+ if (flow->dl_type == htons(ETH_TYPE_IP)) {
+ expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_IPV4;
+ if (attrs[OVS_KEY_ATTR_IPV4]) {
+ const struct ovs_key_ipv4 *ipv4_key;
- case TRANSITION(OVS_KEY_ATTR_ETHERTYPE, OVS_KEY_ATTR_IPV4):
- if (flow->dl_type != htons(ETH_TYPE_IP)) {
- return EINVAL;
- }
- ipv4_key = nl_attr_get(nla);
+ ipv4_key = nl_attr_get(attrs[OVS_KEY_ATTR_IPV4]);
flow->nw_src = ipv4_key->ipv4_src;
flow->nw_dst = ipv4_key->ipv4_dst;
flow->nw_proto = ipv4_key->ipv4_proto;
if (!odp_to_ovs_frag(ipv4_key->ipv4_frag, flow)) {
return EINVAL;
}
- break;
+ }
+ } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
+ expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_IPV6;
+ if (attrs[OVS_KEY_ATTR_IPV6]) {
+ const struct ovs_key_ipv6 *ipv6_key;
- case TRANSITION(OVS_KEY_ATTR_ETHERTYPE, OVS_KEY_ATTR_IPV6):
- if (flow->dl_type != htons(ETH_TYPE_IPV6)) {
- return EINVAL;
- }
- ipv6_key = nl_attr_get(nla);
+ ipv6_key = nl_attr_get(attrs[OVS_KEY_ATTR_IPV6]);
memcpy(&flow->ipv6_src, ipv6_key->ipv6_src, sizeof flow->ipv6_src);
memcpy(&flow->ipv6_dst, ipv6_key->ipv6_dst, sizeof flow->ipv6_dst);
flow->ipv6_label = ipv6_key->ipv6_label;
if (!odp_to_ovs_frag(ipv6_key->ipv6_frag, flow)) {
return EINVAL;
}
- break;
-
- case TRANSITION(OVS_KEY_ATTR_IPV4, OVS_KEY_ATTR_TCP):
- case TRANSITION(OVS_KEY_ATTR_IPV6, OVS_KEY_ATTR_TCP):
- if (flow->nw_proto != IPPROTO_TCP) {
- return EINVAL;
- }
- tcp_key = nl_attr_get(nla);
- flow->tp_src = tcp_key->tcp_src;
- flow->tp_dst = tcp_key->tcp_dst;
- break;
-
- case TRANSITION(OVS_KEY_ATTR_IPV4, OVS_KEY_ATTR_UDP):
- case TRANSITION(OVS_KEY_ATTR_IPV6, OVS_KEY_ATTR_UDP):
- if (flow->nw_proto != IPPROTO_UDP) {
- return EINVAL;
- }
- udp_key = nl_attr_get(nla);
- flow->tp_src = udp_key->udp_src;
- flow->tp_dst = udp_key->udp_dst;
- break;
-
- case TRANSITION(OVS_KEY_ATTR_IPV4, OVS_KEY_ATTR_ICMP):
- if (flow->nw_proto != IPPROTO_ICMP) {
- return EINVAL;
- }
- icmp_key = nl_attr_get(nla);
- flow->tp_src = htons(icmp_key->icmp_type);
- flow->tp_dst = htons(icmp_key->icmp_code);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_IPV6, OVS_KEY_ATTR_ICMPV6):
- if (flow->nw_proto != IPPROTO_ICMPV6) {
- return EINVAL;
- }
- icmpv6_key = nl_attr_get(nla);
- flow->tp_src = htons(icmpv6_key->icmpv6_type);
- flow->tp_dst = htons(icmpv6_key->icmpv6_code);
- break;
+ }
+ } else if (flow->dl_type == htons(ETH_TYPE_ARP)) {
+ expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ARP;
+ if (attrs[OVS_KEY_ATTR_ARP]) {
+ const struct ovs_key_arp *arp_key;
- case TRANSITION(OVS_KEY_ATTR_ETHERTYPE, OVS_KEY_ATTR_ARP):
- if (flow->dl_type != htons(ETH_TYPE_ARP)) {
- return EINVAL;
- }
- arp_key = nl_attr_get(nla);
+ arp_key = nl_attr_get(attrs[OVS_KEY_ATTR_ARP]);
flow->nw_src = arp_key->arp_sip;
flow->nw_dst = arp_key->arp_tip;
if (arp_key->arp_op & htons(0xff00)) {
+ VLOG_ERR_RL(&rl, "unsupported ARP opcode %"PRIu16" in flow "
+ "key", ntohs(arp_key->arp_op));
return EINVAL;
}
flow->nw_proto = ntohs(arp_key->arp_op);
memcpy(flow->arp_sha, arp_key->arp_sha, ETH_ADDR_LEN);
memcpy(flow->arp_tha, arp_key->arp_tha, ETH_ADDR_LEN);
- break;
-
- case TRANSITION(OVS_KEY_ATTR_ICMPV6, OVS_KEY_ATTR_ND):
- if (flow->tp_src != htons(ND_NEIGHBOR_SOLICIT)
- && flow->tp_src != htons(ND_NEIGHBOR_ADVERT)) {
- return EINVAL;
- }
- nd_key = nl_attr_get(nla);
- memcpy(&flow->nd_target, nd_key->nd_target, sizeof flow->nd_target);
- memcpy(flow->arp_sha, nd_key->nd_sll, ETH_ADDR_LEN);
- memcpy(flow->arp_tha, nd_key->nd_tll, ETH_ADDR_LEN);
- break;
-
- default:
- return EINVAL;
}
-
- prev_type = type;
}
- if (left) {
- return EINVAL;
- }
-
- switch (prev_type) {
- case OVS_KEY_ATTR_UNSPEC:
- return EINVAL;
- case OVS_KEY_ATTR_PRIORITY:
- case OVS_KEY_ATTR_TUN_ID:
- case OVS_KEY_ATTR_IN_PORT:
- return EINVAL;
-
- case OVS_KEY_ATTR_ETHERNET:
- case OVS_KEY_ATTR_8021Q:
- return 0;
-
- case OVS_KEY_ATTR_ETHERTYPE:
- if (flow->dl_type == htons(ETH_TYPE_IP)
- || flow->dl_type == htons(ETH_TYPE_IPV6)
- || flow->dl_type == htons(ETH_TYPE_ARP)) {
- return EINVAL;
- }
- return 0;
-
- case OVS_KEY_ATTR_IPV4:
- if (flow->nw_frag & FLOW_NW_FRAG_LATER) {
- return 0;
- }
- if (flow->nw_proto == IPPROTO_TCP
- || flow->nw_proto == IPPROTO_UDP
- || flow->nw_proto == IPPROTO_ICMP) {
- return EINVAL;
- }
- return 0;
+ if (flow->nw_proto == IPPROTO_TCP
+ && (flow->dl_type == htons(ETH_TYPE_IP) ||
+ flow->dl_type == htons(ETH_TYPE_IPV6))
+ && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
+ expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_TCP;
+ if (attrs[OVS_KEY_ATTR_TCP]) {
+ const struct ovs_key_tcp *tcp_key;
- case OVS_KEY_ATTR_IPV6:
- if (flow->nw_frag & FLOW_NW_FRAG_LATER) {
- return 0;
+ tcp_key = nl_attr_get(attrs[OVS_KEY_ATTR_TCP]);
+ flow->tp_src = tcp_key->tcp_src;
+ flow->tp_dst = tcp_key->tcp_dst;
}
- if (flow->nw_proto == IPPROTO_TCP
- || flow->nw_proto == IPPROTO_UDP
- || flow->nw_proto == IPPROTO_ICMPV6) {
- return EINVAL;
+ } else if (flow->nw_proto == IPPROTO_UDP
+ && (flow->dl_type == htons(ETH_TYPE_IP) ||
+ flow->dl_type == htons(ETH_TYPE_IPV6))
+ && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
+ expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_UDP;
+ if (attrs[OVS_KEY_ATTR_UDP]) {
+ const struct ovs_key_udp *udp_key;
+
+ udp_key = nl_attr_get(attrs[OVS_KEY_ATTR_UDP]);
+ flow->tp_src = udp_key->udp_src;
+ flow->tp_dst = udp_key->udp_dst;
}
- return 0;
-
- case OVS_KEY_ATTR_ICMPV6:
- if (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT)
- || flow->tp_src == htons(ND_NEIGHBOR_ADVERT)
- || flow->nw_frag & FLOW_NW_FRAG_LATER) {
- return EINVAL;
+ } else if (flow->nw_proto == IPPROTO_ICMP
+ && flow->dl_type == htons(ETH_TYPE_IP)
+ && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
+ expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ICMP;
+ if (attrs[OVS_KEY_ATTR_ICMP]) {
+ const struct ovs_key_icmp *icmp_key;
+
+ icmp_key = nl_attr_get(attrs[OVS_KEY_ATTR_ICMP]);
+ flow->tp_src = htons(icmp_key->icmp_type);
+ flow->tp_dst = htons(icmp_key->icmp_code);
}
- return 0;
+ } else if (flow->nw_proto == IPPROTO_ICMPV6
+ && flow->dl_type == htons(ETH_TYPE_IPV6)
+ && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
+ expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ICMPV6;
+ if (attrs[OVS_KEY_ATTR_ICMPV6]) {
+ const struct ovs_key_icmpv6 *icmpv6_key;
+
+ icmpv6_key = nl_attr_get(attrs[OVS_KEY_ATTR_ICMPV6]);
+ flow->tp_src = htons(icmpv6_key->icmpv6_type);
+ flow->tp_dst = htons(icmpv6_key->icmpv6_code);
- case OVS_KEY_ATTR_TCP:
- case OVS_KEY_ATTR_UDP:
- case OVS_KEY_ATTR_ICMP:
- case OVS_KEY_ATTR_ND:
- if (flow->nw_frag & FLOW_NW_FRAG_LATER) {
- return EINVAL;
+ if (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT) ||
+ flow->tp_src == htons(ND_NEIGHBOR_ADVERT)) {
+ expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ND;
+ if (attrs[OVS_KEY_ATTR_ND]) {
+ const struct ovs_key_nd *nd_key;
+
+ nd_key = nl_attr_get(attrs[OVS_KEY_ATTR_ND]);
+ memcpy(&flow->nd_target, nd_key->nd_target,
+ sizeof flow->nd_target);
+ memcpy(flow->arp_sha, nd_key->nd_sll, ETH_ADDR_LEN);
+ memcpy(flow->arp_tha, nd_key->nd_tll, ETH_ADDR_LEN);
+ }
+ }
}
- return 0;
+ }
- case OVS_KEY_ATTR_ARP:
- return 0;
+ missing_attrs = expected_attrs & ~present_attrs;
+ if (missing_attrs) {
+ static struct vlog_rate_limit miss_rl = VLOG_RATE_LIMIT_INIT(10, 10);
+ log_odp_key_attributes(&miss_rl, "expected but not present",
+ missing_attrs, key, key_len);
+ return EINVAL;
+ }
- case __OVS_KEY_ATTR_MAX:
- default:
- NOT_REACHED();
+ extra_attrs = present_attrs & ~expected_attrs;
+ if (extra_attrs) {
+ static struct vlog_rate_limit extra_rl = VLOG_RATE_LIMIT_INIT(10, 10);
+ log_odp_key_attributes(&extra_rl, "present but not expected",
+ extra_attrs, key, key_len);
+ return EINVAL;
}
+
+ return 0;
}
projects / openvswitch / commitdiff