X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fclassifier.c;h=dab8f620fbb6622422c8e6a37cdcf604462aec14;hb=2c8fcc9cd6a7bbb948f6c79879e89c7ed791c9b1;hp=fcc965c873aa7679533b022ad1c67840ec9a42b2;hpb=685a51a5b89750cead1b2934c2079d2bb9c52a4a;p=openvswitch

diff --git a/lib/classifier.c b/lib/classifier.c
index fcc965c8..dab8f620 100644
--- a/lib/classifier.c
+++ b/lib/classifier.c
@@ -32,9 +32,6 @@ static struct cls_table *find_table(const struct classifier *,
 static struct cls_table *insert_table(struct classifier *,
                                       const struct flow_wildcards *);
 
-static struct cls_table *classifier_first_table(const struct classifier *);
-static struct cls_table *classifier_next_table(const struct classifier *,
-                                               const struct cls_table *);
 static void destroy_table(struct classifier *, struct cls_table *);
 
 static struct cls_rule *find_match(const struct cls_table *,
@@ -45,7 +42,6 @@ static struct cls_rule *insert_rule(struct cls_table *, struct cls_rule *);
 
 static bool flow_equal_except(const struct flow *, const struct flow *,
                                 const struct flow_wildcards *);
-static void zero_wildcards(struct flow *, const struct flow_wildcards *);
 
 /* Iterates RULE over HEAD and all of the cls_rules on HEAD->list. */
 #define FOR_EACH_RULE_IN_LIST(RULE, HEAD)                               \
@@ -58,12 +54,6 @@ static void zero_wildcards(struct flow *, const struct flow_wildcards *);
 static struct cls_rule *next_rule_in_list__(struct cls_rule *);
 static struct cls_rule *next_rule_in_list(struct cls_rule *);
 
-static struct cls_table *
-cls_table_from_hmap_node(const struct hmap_node *node)
-{
-    return node ? CONTAINER_OF(node, struct cls_table, hmap_node) : NULL;
-}
-
 /* Converts the flow in 'flow' into a cls_rule in 'rule', with the given
  * 'wildcards' and 'priority'. */
 void
@@ -84,6 +74,7 @@ cls_rule_init_exact(const struct flow *flow,
                     unsigned int priority, struct cls_rule *rule)
 {
     rule->flow = *flow;
+    rule->flow.priority = 0;
     flow_wildcards_init_exact(&rule->wc);
     rule->priority = priority;
 }
@@ -109,7 +100,7 @@ cls_rule_init_catchall(struct cls_rule *rule, unsigned int priority)
 void
 cls_rule_zero_wildcarded_fields(struct cls_rule *rule)
 {
-    zero_wildcards(&rule->flow, &rule->wc);
+    flow_zero_wildcards(&rule->flow, &rule->wc);
 }
 
 void
@@ -142,10 +133,10 @@ cls_rule_set_tun_id_masked(struct cls_rule *rule,
 }
 
 void
-cls_rule_set_in_port(struct cls_rule *rule, uint16_t odp_port)
+cls_rule_set_in_port(struct cls_rule *rule, uint16_t ofp_port)
 {
     rule->wc.wildcards &= ~FWW_IN_PORT;
-    rule->flow.in_port = odp_port;
+    rule->flow.in_port = ofp_port;
 }
 
 void
@@ -162,6 +153,7 @@ cls_rule_set_dl_src(struct cls_rule *rule, const uint8_t dl_src[ETH_ADDR_LEN])
     memcpy(rule->flow.dl_src, dl_src, ETH_ADDR_LEN);
 }
 
+/* Modifies 'rule' so that the Ethernet address must match 'dl_dst' exactly. */
 void
 cls_rule_set_dl_dst(struct cls_rule *rule, const uint8_t dl_dst[ETH_ADDR_LEN])
 {
@@ -169,6 +161,25 @@ cls_rule_set_dl_dst(struct cls_rule *rule, const uint8_t dl_dst[ETH_ADDR_LEN])
     memcpy(rule->flow.dl_dst, dl_dst, ETH_ADDR_LEN);
 }
 
+/* Modifies 'rule' so that the Ethernet address must match 'dl_dst' after each
+ * byte is ANDed with the appropriate byte in 'mask'.
+ *
+ * This function will assert-fail if 'mask' is invalid.  Only 'mask' values
+ * accepted by flow_wildcards_is_dl_dst_mask_valid() are allowed. */
+void
+cls_rule_set_dl_dst_masked(struct cls_rule *rule,
+                           const uint8_t dl_dst[ETH_ADDR_LEN],
+                           const uint8_t mask[ETH_ADDR_LEN])
+{
+    flow_wildcards_t *wc = &rule->wc.wildcards;
+    size_t i;
+
+    *wc = flow_wildcards_set_dl_dst_mask(*wc, mask);
+    for (i = 0; i < ETH_ADDR_LEN; i++) {
+        rule->flow.dl_dst[i] = dl_dst[i] & mask[i];
+    }
+}
+
 void
 cls_rule_set_dl_tci(struct cls_rule *rule, ovs_be16 tci)
 {
@@ -207,12 +218,10 @@ cls_rule_set_any_vid(struct cls_rule *rule)
 void
 cls_rule_set_dl_vlan(struct cls_rule *rule, ovs_be16 dl_vlan)
 {
+    flow_set_vlan_vid(&rule->flow, dl_vlan);
     if (dl_vlan == htons(OFP_VLAN_NONE)) {
-        cls_rule_set_dl_tci(rule, htons(0));
+        rule->wc.vlan_tci_mask = htons(UINT16_MAX);
     } else {
-        dl_vlan &= htons(VLAN_VID_MASK);
-        rule->flow.vlan_tci &= ~htons(VLAN_VID_MASK);
-        rule->flow.vlan_tci |= htons(VLAN_CFI) | dl_vlan;
         rule->wc.vlan_tci_mask |= htons(VLAN_VID_MASK | VLAN_CFI);
     }
 }
@@ -236,9 +245,7 @@ cls_rule_set_any_pcp(struct cls_rule *rule)
 void
 cls_rule_set_dl_vlan_pcp(struct cls_rule *rule, uint8_t dl_vlan_pcp)
 {
-    dl_vlan_pcp &= 0x07;
-    rule->flow.vlan_tci &= ~htons(VLAN_PCP_MASK);
-    rule->flow.vlan_tci |= htons((dl_vlan_pcp << VLAN_PCP_SHIFT) | VLAN_CFI);
+    flow_set_vlan_pcp(&rule->flow, dl_vlan_pcp);
     rule->wc.vlan_tci_mask |= htons(VLAN_CFI | VLAN_PCP_MASK);
 }
 
@@ -266,57 +273,82 @@ cls_rule_set_nw_proto(struct cls_rule *rule, uint8_t nw_proto)
 void
 cls_rule_set_nw_src(struct cls_rule *rule, ovs_be32 nw_src)
 {
-    cls_rule_set_nw_src_masked(rule, nw_src, htonl(UINT32_MAX));
+    rule->flow.nw_src = nw_src;
+    rule->wc.nw_src_mask = htonl(UINT32_MAX);
 }
 
-bool
-cls_rule_set_nw_src_masked(struct cls_rule *rule, ovs_be32 ip, ovs_be32 mask)
+void
+cls_rule_set_nw_src_masked(struct cls_rule *rule,
+                           ovs_be32 nw_src, ovs_be32 mask)
 {
-    if (flow_wildcards_set_nw_src_mask(&rule->wc, mask)) {
-        rule->flow.nw_src = ip & mask;
-        return true;
-    } else {
-        return false;
-    }
+    rule->flow.nw_src = nw_src & mask;
+    rule->wc.nw_src_mask = mask;
 }
 
 void
 cls_rule_set_nw_dst(struct cls_rule *rule, ovs_be32 nw_dst)
 {
-    cls_rule_set_nw_dst_masked(rule, nw_dst, htonl(UINT32_MAX));
+    rule->flow.nw_dst = nw_dst;
+    rule->wc.nw_dst_mask = htonl(UINT32_MAX);
 }
 
-bool
+void
 cls_rule_set_nw_dst_masked(struct cls_rule *rule, ovs_be32 ip, ovs_be32 mask)
 {
-    if (flow_wildcards_set_nw_dst_mask(&rule->wc, mask)) {
-        rule->flow.nw_dst = ip & mask;
-        return true;
-    } else {
-        return false;
-    }
+    rule->flow.nw_dst = ip & mask;
+    rule->wc.nw_dst_mask = mask;
+}
+
+void
+cls_rule_set_nw_dscp(struct cls_rule *rule, uint8_t nw_dscp)
+{
+    rule->wc.wildcards &= ~FWW_NW_DSCP;
+    rule->flow.nw_tos &= ~IP_DSCP_MASK;
+    rule->flow.nw_tos |= nw_dscp & IP_DSCP_MASK;
+}
+
+void
+cls_rule_set_nw_ecn(struct cls_rule *rule, uint8_t nw_ecn)
+{
+    rule->wc.wildcards &= ~FWW_NW_ECN;
+    rule->flow.nw_tos &= ~IP_ECN_MASK;
+    rule->flow.nw_tos |= nw_ecn & IP_ECN_MASK;
 }
 
 void
-cls_rule_set_nw_tos(struct cls_rule *rule, uint8_t nw_tos)
+cls_rule_set_nw_ttl(struct cls_rule *rule, uint8_t nw_ttl)
 {
-    rule->wc.wildcards &= ~FWW_NW_TOS;
-    rule->flow.nw_tos = nw_tos & IP_DSCP_MASK;
+    rule->wc.wildcards &= ~FWW_NW_TTL;
+    rule->flow.nw_ttl = nw_ttl;
+}
+
+void
+cls_rule_set_nw_frag(struct cls_rule *rule, uint8_t nw_frag)
+{
+    rule->wc.nw_frag_mask |= FLOW_NW_FRAG_MASK;
+    rule->flow.nw_frag = nw_frag;
+}
+
+void
+cls_rule_set_nw_frag_masked(struct cls_rule *rule,
+                            uint8_t nw_frag, uint8_t mask)
+{
+    rule->flow.nw_frag = nw_frag & mask;
+    rule->wc.nw_frag_mask = mask;
 }
 
 void
 cls_rule_set_icmp_type(struct cls_rule *rule, uint8_t icmp_type)
 {
     rule->wc.wildcards &= ~FWW_TP_SRC;
-    rule->flow.icmp_type = htons(icmp_type);
-
+    rule->flow.tp_src = htons(icmp_type);
 }
 
 void
 cls_rule_set_icmp_code(struct cls_rule *rule, uint8_t icmp_code)
 {
     rule->wc.wildcards &= ~FWW_TP_DST;
-    rule->flow.icmp_code = htons(icmp_code);
+    rule->flow.tp_dst = htons(icmp_code);
 }
 
 void
@@ -336,44 +368,45 @@ cls_rule_set_arp_tha(struct cls_rule *rule, const uint8_t tha[ETH_ADDR_LEN])
 void
 cls_rule_set_ipv6_src(struct cls_rule *rule, const struct in6_addr *src)
 {
-    cls_rule_set_ipv6_src_masked(rule, src, &in6addr_exact);
+    rule->flow.ipv6_src = *src;
+    rule->wc.ipv6_src_mask = in6addr_exact;
 }
 
-bool
+void
 cls_rule_set_ipv6_src_masked(struct cls_rule *rule, const struct in6_addr *src,
                              const struct in6_addr *mask)
 {
-    if (flow_wildcards_set_ipv6_src_mask(&rule->wc, mask)) {
-        rule->flow.ipv6_src = ipv6_addr_bitand(src, mask);
-        return true;
-    } else {
-        return false;
-    }
+    rule->flow.ipv6_src = ipv6_addr_bitand(src, mask);
+    rule->wc.ipv6_src_mask = *mask;
 }
 
 void
 cls_rule_set_ipv6_dst(struct cls_rule *rule, const struct in6_addr *dst)
 {
-    cls_rule_set_ipv6_dst_masked(rule, dst, &in6addr_exact);
+    rule->flow.ipv6_dst = *dst;
+    rule->wc.ipv6_dst_mask = in6addr_exact;
 }
 
-bool
+void
 cls_rule_set_ipv6_dst_masked(struct cls_rule *rule, const struct in6_addr *dst,
                              const struct in6_addr *mask)
 {
-    if (flow_wildcards_set_ipv6_dst_mask(&rule->wc, mask)) {
-        rule->flow.ipv6_dst = ipv6_addr_bitand(dst, mask);
-        return true;
-    } else {
-        return false;
-    }
+    rule->flow.ipv6_dst = ipv6_addr_bitand(dst, mask);
+    rule->wc.ipv6_dst_mask = *mask;
+}
+
+void
+cls_rule_set_ipv6_label(struct cls_rule *rule, ovs_be32 ipv6_label)
+{
+    rule->wc.wildcards &= ~FWW_IPV6_LABEL;
+    rule->flow.ipv6_label = ipv6_label;
 }
 
 void
-cls_rule_set_nd_target(struct cls_rule *rule, const struct in6_addr target)
+cls_rule_set_nd_target(struct cls_rule *rule, const struct in6_addr *target)
 {
     rule->wc.wildcards &= ~FWW_ND_TARGET;
-    rule->flow.nd_target = target;
+    rule->flow.nd_target = *target;
 }
 
 /* Returns true if 'a' and 'b' have the same priority, wildcard the same
@@ -386,20 +419,23 @@ cls_rule_equal(const struct cls_rule *a, const struct cls_rule *b)
             && flow_equal(&a->flow, &b->flow));
 }
 
+/* Returns a hash value for the flow, wildcards, and priority in 'rule',
+ * starting from 'basis'. */
+uint32_t
+cls_rule_hash(const struct cls_rule *rule, uint32_t basis)
+{
+    uint32_t h0 = flow_hash(&rule->flow, basis);
+    uint32_t h1 = flow_wildcards_hash(&rule->wc, h0);
+    return hash_int(rule->priority, h1);
+}
+
 static void
 format_ip_netmask(struct ds *s, const char *name, ovs_be32 ip,
                   ovs_be32 netmask)
 {
     if (netmask) {
-        ds_put_format(s, "%s="IP_FMT, name, IP_ARGS(&ip));
-        if (netmask != htonl(UINT32_MAX)) {
-            if (ip_is_cidr(netmask)) {
-                int wcbits = ofputil_netmask_to_wcbits(netmask);
-                ds_put_format(s, "/%d", 32 - wcbits);
-            } else {
-                ds_put_format(s, "/"IP_FMT, IP_ARGS(&netmask));
-            }
-        }
+        ds_put_format(s, "%s=", name);
+        ip_format_masked(ip, netmask, s);
         ds_put_char(s, ',');
     }
 }
@@ -411,16 +447,7 @@ format_ipv6_netmask(struct ds *s, const char *name,
 {
     if (!ipv6_mask_is_any(netmask)) {
         ds_put_format(s, "%s=", name);
-        print_ipv6_addr(s, addr);
-        if (!ipv6_mask_is_exact(netmask)) {
-            if (ipv6_is_cidr(netmask)) {
-                int cidr_bits = ipv6_count_cidr_bits(netmask);
-                ds_put_format(s, "/%d", cidr_bits);
-            } else {
-                ds_put_char(s, '/');
-                print_ipv6_addr(s, netmask);
-            }
-        }
+        print_ipv6_masked(s, addr, netmask);
         ds_put_char(s, ',');
     }
 }
@@ -437,6 +464,8 @@ cls_rule_format(const struct cls_rule *rule, struct ds *s)
 
     int i;
 
+    BUILD_ASSERT_DECL(FLOW_WC_SEQ == 7);
+
     if (rule->priority != OFP_DEFAULT_PRIORITY) {
         ds_put_format(s, "priority=%d,", rule->priority);
     }
@@ -506,8 +535,7 @@ cls_rule_format(const struct cls_rule *rule, struct ds *s)
         break;
     }
     if (!(w & FWW_IN_PORT)) {
-        ds_put_format(s, "in_port=%"PRIu16",",
-                      odp_port_to_ofp_port(f->in_port));
+        ds_put_format(s, "in_port=%"PRIu16",", f->in_port);
     }
     if (wc->vlan_tci_mask) {
         ovs_be16 vid_mask = wc->vlan_tci_mask & htons(VLAN_VID_MASK);
@@ -526,6 +554,8 @@ cls_rule_format(const struct cls_rule *rule, struct ds *s)
                 ds_put_format(s, "dl_vlan_pcp=%d,",
                               vlan_tci_to_pcp(f->vlan_tci));
             }
+        } else if (wc->vlan_tci_mask == htons(0xffff)) {
+            ds_put_format(s, "vlan_tci=0x%04"PRIx16",", ntohs(f->vlan_tci));
         } else {
             ds_put_format(s, "vlan_tci=0x%04"PRIx16"/0x%04"PRIx16",",
                           ntohs(f->vlan_tci), ntohs(wc->vlan_tci_mask));
@@ -555,13 +585,16 @@ cls_rule_format(const struct cls_rule *rule, struct ds *s)
     if (f->dl_type == htons(ETH_TYPE_IPV6)) {
         format_ipv6_netmask(s, "ipv6_src", &f->ipv6_src, &wc->ipv6_src_mask);
         format_ipv6_netmask(s, "ipv6_dst", &f->ipv6_dst, &wc->ipv6_dst_mask);
+        if (!(w & FWW_IPV6_LABEL)) {
+            ds_put_format(s, "ipv6_label=0x%05"PRIx32",", ntohl(f->ipv6_label));
+        }
     } else {
         format_ip_netmask(s, "nw_src", f->nw_src, wc->nw_src_mask);
         format_ip_netmask(s, "nw_dst", f->nw_dst, wc->nw_dst_mask);
     }
     if (!skip_proto && !(w & FWW_NW_PROTO)) {
         if (f->dl_type == htons(ETH_TYPE_ARP)) {
-            ds_put_format(s, "opcode=%"PRIu8",", f->nw_proto);
+            ds_put_format(s, "arp_op=%"PRIu8",", f->nw_proto);
         } else {
             ds_put_format(s, "nw_proto=%"PRIu8",", f->nw_proto);
         }
@@ -576,8 +609,32 @@ cls_rule_format(const struct cls_rule *rule, struct ds *s)
                     ETH_ADDR_ARGS(f->arp_tha));
         }
     }
-    if (!(w & FWW_NW_TOS)) {
-        ds_put_format(s, "nw_tos=%"PRIu8",", f->nw_tos);
+    if (!(w & FWW_NW_DSCP)) {
+        ds_put_format(s, "nw_tos=%"PRIu8",", f->nw_tos & IP_DSCP_MASK);
+    }
+    if (!(w & FWW_NW_ECN)) {
+        ds_put_format(s, "nw_ecn=%"PRIu8",", f->nw_tos & IP_ECN_MASK);
+    }
+    if (!(w & FWW_NW_TTL)) {
+        ds_put_format(s, "nw_ttl=%"PRIu8",", f->nw_ttl);
+    }
+    switch (wc->nw_frag_mask) {
+    case FLOW_NW_FRAG_ANY | FLOW_NW_FRAG_LATER:
+        ds_put_format(s, "nw_frag=%s,",
+                      f->nw_frag & FLOW_NW_FRAG_ANY
+                      ? (f->nw_frag & FLOW_NW_FRAG_LATER ? "later" : "first")
+                      : (f->nw_frag & FLOW_NW_FRAG_LATER ? "<error>" : "no"));
+        break;
+
+    case FLOW_NW_FRAG_ANY:
+        ds_put_format(s, "nw_frag=%s,",
+                      f->nw_frag & FLOW_NW_FRAG_ANY ? "yes" : "no");
+        break;
+
+    case FLOW_NW_FRAG_LATER:
+        ds_put_format(s, "nw_frag=%s,",
+                      f->nw_frag & FLOW_NW_FRAG_LATER ? "later" : "not_later");
+        break;
     }
     if (f->nw_proto == IPPROTO_ICMP) {
         if (!(w & FWW_TP_SRC)) {
@@ -599,11 +656,11 @@ cls_rule_format(const struct cls_rule *rule, struct ds *s)
             ds_put_char(s, ',');
         }
         if (!(w & FWW_ARP_SHA)) {
-            ds_put_format(s, "nd_sll="ETH_ADDR_FMT",", 
+            ds_put_format(s, "nd_sll="ETH_ADDR_FMT",",
                     ETH_ADDR_ARGS(f->arp_sha));
         }
         if (!(w & FWW_ARP_THA)) {
-            ds_put_format(s, "nd_tll="ETH_ADDR_FMT",", 
+            ds_put_format(s, "nd_tll="ETH_ADDR_FMT",",
                     ETH_ADDR_ARGS(f->arp_tha));
         }
    } else {
@@ -691,7 +748,7 @@ classifier_count(const struct classifier *cls)
  * rule, even rules that cannot have any effect because the new rule matches a
  * superset of their flows and has higher priority. */
 struct cls_rule *
-classifier_insert(struct classifier *cls, struct cls_rule *rule)
+classifier_replace(struct classifier *cls, struct cls_rule *rule)
 {
     struct cls_rule *old_rule;
     struct cls_table *table;
@@ -709,6 +766,19 @@ classifier_insert(struct classifier *cls, struct cls_rule *rule)
     return old_rule;
 }
 
+/* Inserts 'rule' into 'cls'.  Until 'rule' is removed from 'cls', the caller
+ * must not modify or free it.
+ *
+ * 'cls' must not contain an identical rule (including wildcards, values of
+ * fixed fields, and priority).  Use classifier_find_rule_exactly() to find
+ * such a rule. */
+void
+classifier_insert(struct classifier *cls, struct cls_rule *rule)
+{
+    struct cls_rule *displaced_rule = classifier_replace(cls, rule);
+    assert(!displaced_rule);
+}
+
 /* Removes 'rule' from 'cls'.  It is the caller's responsibility to free
  * 'rule', if this is desirable. */
 void
@@ -759,10 +829,7 @@ classifier_lookup(const struct classifier *cls, const struct flow *flow)
 
 /* Finds and returns a rule in 'cls' with exactly the same priority and
  * matching criteria as 'target'.  Returns a null pointer if 'cls' doesn't
- * contain an exact match.
- *
- * Priority is ignored for exact-match rules (because OpenFlow 1.0 always
- * treats exact-match rules as highest priority). */
+ * contain an exact match. */
 struct cls_rule *
 classifier_find_rule_exactly(const struct classifier *cls,
                              const struct cls_rule *target)
@@ -776,9 +843,6 @@ classifier_find_rule_exactly(const struct classifier *cls,
     }
 
     head = find_equal(table, &target->flow, flow_hash(&target->flow, 0));
-    if (flow_wildcards_is_exact(&target->wc)) {
-        return head;
-    }
     FOR_EACH_RULE_IN_LIST (rule, head) {
         if (target->priority >= rule->priority) {
             return target->priority == rule->priority ? rule : NULL;
@@ -889,8 +953,7 @@ cls_cursor_first(struct cls_cursor *cursor)
 {
     struct cls_table *table;
 
-    for (table = classifier_first_table(cursor->cls); table;
-         table = classifier_next_table(cursor->cls, table)) {
+    HMAP_FOR_EACH (table, hmap_node, &cursor->cls->tables) {
         struct cls_rule *rule = search_table(table, cursor->target);
         if (rule) {
             cursor->table = table;
@@ -924,8 +987,8 @@ cls_cursor_next(struct cls_cursor *cursor, struct cls_rule *rule)
         }
     }
 
-    for (table = classifier_next_table(cursor->cls, cursor->table); table;
-         table = classifier_next_table(cursor->cls, table)) {
+    table = cursor->table;
+    HMAP_FOR_EACH_CONTINUE (table, hmap_node, &cursor->cls->tables) {
         rule = search_table(table, cursor->target);
         if (rule) {
             cursor->table = table;
@@ -941,7 +1004,7 @@ find_table(const struct classifier *cls, const struct flow_wildcards *wc)
 {
     struct cls_table *table;
 
-    HMAP_FOR_EACH_IN_BUCKET (table, hmap_node, flow_wildcards_hash(wc),
+    HMAP_FOR_EACH_IN_BUCKET (table, hmap_node, flow_wildcards_hash(wc, 0),
                              &cls->tables) {
         if (flow_wildcards_equal(wc, &table->wc)) {
             return table;
@@ -958,25 +1021,11 @@ insert_table(struct classifier *cls, const struct flow_wildcards *wc)
     table = xzalloc(sizeof *table);
     hmap_init(&table->rules);
     table->wc = *wc;
-    hmap_insert(&cls->tables, &table->hmap_node, flow_wildcards_hash(wc));
+    hmap_insert(&cls->tables, &table->hmap_node, flow_wildcards_hash(wc, 0));
 
     return table;
 }
 
-static struct cls_table *
-classifier_first_table(const struct classifier *cls)
-{
-    return cls_table_from_hmap_node(hmap_first(&cls->tables));
-}
-
-static struct cls_table *
-classifier_next_table(const struct classifier *cls,
-                      const struct cls_table *table)
-{
-    return cls_table_from_hmap_node(hmap_next(&cls->tables,
-                                              &table->hmap_node));
-}
-
 static void
 destroy_table(struct classifier *cls, struct cls_table *table)
 {
@@ -992,7 +1041,7 @@ find_match(const struct cls_table *table, const struct flow *flow)
     struct flow f;
 
     f = *flow;
-    zero_wildcards(&f, &table->wc);
+    flow_zero_wildcards(&f, &table->wc);
     HMAP_FOR_EACH_WITH_HASH (rule, hmap_node, flow_hash(&f, 0),
                              &table->rules) {
         if (flow_equal(&f, &rule->flow)) {
@@ -1100,7 +1149,7 @@ flow_equal_except(const struct flow *a, const struct flow *b,
     const flow_wildcards_t wc = wildcards->wildcards;
     int i;
 
-    BUILD_ASSERT_DECL(FLOW_SIG_SIZE == 100 + FLOW_N_REGS * 4);
+    BUILD_ASSERT_DECL(FLOW_WC_SEQ == 7);
 
     for (i = 0; i < FLOW_N_REGS; i++) {
         if ((a->regs[i] ^ b->regs[i]) & wildcards->reg_masks[i]) {
@@ -1127,71 +1176,17 @@ flow_equal_except(const struct flow *a, const struct flow *b,
             && (wc & FWW_ETH_MCAST
                 || !((a->dl_dst[0] ^ b->dl_dst[0]) & 0x01))
             && (wc & FWW_NW_PROTO || a->nw_proto == b->nw_proto)
-            && (wc & FWW_NW_TOS || a->nw_tos == b->nw_tos)
+            && (wc & FWW_NW_TTL || a->nw_ttl == b->nw_ttl)
+            && (wc & FWW_NW_DSCP || !((a->nw_tos ^ b->nw_tos) & IP_DSCP_MASK))
+            && (wc & FWW_NW_ECN || !((a->nw_tos ^ b->nw_tos) & IP_ECN_MASK))
+            && !((a->nw_frag ^ b->nw_frag) & wildcards->nw_frag_mask)
             && (wc & FWW_ARP_SHA || eth_addr_equals(a->arp_sha, b->arp_sha))
             && (wc & FWW_ARP_THA || eth_addr_equals(a->arp_tha, b->arp_tha))
+            && (wc & FWW_IPV6_LABEL || a->ipv6_label == b->ipv6_label)
             && ipv6_equal_except(&a->ipv6_src, &b->ipv6_src,
                     &wildcards->ipv6_src_mask)
             && ipv6_equal_except(&a->ipv6_dst, &b->ipv6_dst,
                     &wildcards->ipv6_dst_mask)
-            && (wc & FWW_ND_TARGET 
+            && (wc & FWW_ND_TARGET
                 || ipv6_addr_equals(&a->nd_target, &b->nd_target)));
 }
-
-static void
-zero_wildcards(struct flow *flow, const struct flow_wildcards *wildcards)
-{
-    const flow_wildcards_t wc = wildcards->wildcards;
-    int i;
-
-    BUILD_ASSERT_DECL(FLOW_SIG_SIZE == 100 + 4 * FLOW_N_REGS);
-
-    for (i = 0; i < FLOW_N_REGS; i++) {
-        flow->regs[i] &= wildcards->reg_masks[i];
-    }
-    flow->tun_id &= wildcards->tun_id_mask;
-    flow->nw_src &= wildcards->nw_src_mask;
-    flow->nw_dst &= wildcards->nw_dst_mask;
-    if (wc & FWW_IN_PORT) {
-        flow->in_port = 0;
-    }
-    flow->vlan_tci &= wildcards->vlan_tci_mask;
-    if (wc & FWW_DL_TYPE) {
-        flow->dl_type = 0;
-    }
-    if (wc & FWW_TP_SRC) {
-        flow->tp_src = 0;
-    }
-    if (wc & FWW_TP_DST) {
-        flow->tp_dst = 0;
-    }
-    if (wc & FWW_DL_SRC) {
-        memset(flow->dl_src, 0, sizeof flow->dl_src);
-    }
-    if (wc & FWW_DL_DST) {
-        flow->dl_dst[0] &= 0x01;
-        memset(&flow->dl_dst[1], 0, 5);
-    }
-    if (wc & FWW_ETH_MCAST) {
-        flow->dl_dst[0] &= 0xfe;
-    }
-    if (wc & FWW_NW_PROTO) {
-        flow->nw_proto = 0;
-    }
-    if (wc & FWW_NW_TOS) {
-        flow->nw_tos = 0;
-    }
-    if (wc & FWW_ARP_SHA) {
-        memset(flow->arp_sha, 0, sizeof flow->arp_sha);
-    }
-    if (wc & FWW_ARP_THA) {
-        memset(flow->arp_tha, 0, sizeof flow->arp_tha);
-    }
-    flow->ipv6_src = ipv6_addr_bitand(&flow->ipv6_src,
-            &wildcards->ipv6_src_mask);
-    flow->ipv6_dst = ipv6_addr_bitand(&flow->ipv6_dst,
-            &wildcards->ipv6_dst_mask);
-    if (wc & FWW_ND_TARGET) {
-        memset(&flow->nd_target, 0, sizeof flow->nd_target);
-    }
-}