cls_match_alloc(const struct cls_rule *rule, cls_version_t version,
const struct cls_conjunction conj[], size_t n)
{
- int count = count_1bits(rule->match.flow->map);
+ size_t count = miniflow_n_values(rule->match.flow);
struct cls_match *cls_match
= xmalloc(sizeof *cls_match + MINIFLOW_VALUES_SIZE(count));
return rule;
}
+/* Type with maximum supported prefix length. */
+union trie_prefix {
+ struct in6_addr ipv6; /* For sizing. */
+ ovs_be32 be32; /* For access. */
+};
+
static unsigned int minimask_get_prefix_len(const struct minimask *,
const struct mf_field *);
static void trie_init(struct classifier *cls, int trie_idx,
const struct mf_field *);
static unsigned int trie_lookup(const struct cls_trie *, const struct flow *,
- union mf_value *plens);
+ union trie_prefix *plens);
static unsigned int trie_lookup_value(const rcu_trie_ptr *,
const ovs_be32 value[], ovs_be32 plens[],
unsigned int value_bits);
return a->priority == b->priority && minimatch_equal(&a->match, &b->match);
}
-/* Returns a hash value for 'rule', folding in 'basis'. */
-uint32_t
-cls_rule_hash(const struct cls_rule *rule, uint32_t basis)
-{
- return minimatch_hash(&rule->match, hash_int(rule->priority, basis));
-}
-
/* Appends a string describing 'rule' to 's'. */
void
cls_rule_format(const struct cls_rule *rule, struct ds *s)
return minimask_is_catchall(rule->match.mask);
}
-/* Makes rule invisible after 'version'. Once that version is made invisible
- * (by changing the version parameter used in lookups), the rule should be
- * actually removed via ovsrcu_postpone().
+/* Makes 'rule' invisible in 'remove_version'. Once that version is used in
+ * lookups, the caller should remove 'rule' via ovsrcu_postpone().
*
- * 'rule_' must be in a classifier. */
+ * 'rule' must be in a classifier. */
void
cls_rule_make_invisible_in_version(const struct cls_rule *rule,
cls_version_t remove_version)
cls->n_rules = 0;
cmap_init(&cls->subtables_map);
pvector_init(&cls->subtables);
- cmap_init(&cls->partitions);
cls->n_flow_segments = 0;
if (flow_segments) {
while (cls->n_flow_segments < CLS_MAX_INDICES
classifier_destroy(struct classifier *cls)
{
if (cls) {
- struct cls_partition *partition;
struct cls_subtable *subtable;
int i;
}
cmap_destroy(&cls->subtables_map);
- CMAP_FOR_EACH (partition, cmap_node, &cls->partitions) {
- ovsrcu_postpone(free, partition);
- }
- cmap_destroy(&cls->partitions);
-
pvector_destroy(&cls->subtables);
}
}
return cls->n_rules;
}
-static uint32_t
-hash_metadata(ovs_be64 metadata)
-{
- return hash_uint64((OVS_FORCE uint64_t) metadata);
-}
-
-static struct cls_partition *
-find_partition(const struct classifier *cls, ovs_be64 metadata, uint32_t hash)
-{
- struct cls_partition *partition;
-
- CMAP_FOR_EACH_WITH_HASH (partition, cmap_node, hash, &cls->partitions) {
- if (partition->metadata == metadata) {
- return partition;
- }
- }
-
- return NULL;
-}
-
-static struct cls_partition *
-create_partition(struct classifier *cls, struct cls_subtable *subtable,
- ovs_be64 metadata)
-{
- uint32_t hash = hash_metadata(metadata);
- struct cls_partition *partition = find_partition(cls, metadata, hash);
- if (!partition) {
- partition = xmalloc(sizeof *partition);
- partition->metadata = metadata;
- partition->tags = 0;
- tag_tracker_init(&partition->tracker);
- cmap_insert(&cls->partitions, &partition->cmap_node, hash);
- }
- tag_tracker_add(&partition->tracker, &partition->tags, subtable->tag);
- return partition;
-}
-
static inline ovs_be32 minimatch_get_ports(const struct minimatch *match)
{
/* Could optimize to use the same map if needed for fast path. */
{
/* Rule's data is already in the tries. */
- new->partition = head->partition; /* Steal partition, if any. */
- head->partition = NULL;
-
for (int i = 0; i < subtable->n_indices; i++) {
cmap_replace(&subtable->indices[i], &head->index_nodes[i],
&new->index_nodes[i], ihash[i]);
struct cls_match *new;
struct cls_subtable *subtable;
uint32_t ihash[CLS_MAX_INDICES];
- uint8_t prev_be64ofs = 0;
struct cls_match *head;
+ unsigned int mask_offset;
size_t n_rules = 0;
uint32_t basis;
uint32_t hash;
- int i;
+ unsigned int i;
/* 'new' is initially invisible to lookups. */
new = cls_match_alloc(rule, version, conjs, n_conjs);
/* Compute hashes in segments. */
basis = 0;
+ mask_offset = 0;
for (i = 0; i < subtable->n_indices; i++) {
- ihash[i] = minimatch_hash_range(&rule->match, prev_be64ofs,
- subtable->index_ofs[i], &basis);
- prev_be64ofs = subtable->index_ofs[i];
+ ihash[i] = minimatch_hash_range(&rule->match, subtable->index_maps[i],
+ &mask_offset, &basis);
}
- hash = minimatch_hash_range(&rule->match, prev_be64ofs, FLOW_U64S, &basis);
+ hash = minimatch_hash_range(&rule->match, subtable->index_maps[i],
+ &mask_offset, &basis);
head = find_equal(subtable, rule->match.flow, hash);
if (!head) {
subtable->ports_mask_len);
}
- /* Add rule to partitions.
- *
- * Concurrent readers might miss seeing the rule until this update,
- * which might require being fixed up by revalidation later. */
- new->partition = NULL;
- if (minimask_get_metadata_mask(rule->match.mask) == OVS_BE64_MAX) {
- ovs_be64 metadata = miniflow_get_metadata(rule->match.flow);
-
- new->partition = create_partition(cls, subtable, metadata);
- }
-
/* Add new node to segment indices.
*
* Readers may find the rule in the indices before the rule is visible
classifier_remove(struct classifier *cls, const struct cls_rule *cls_rule)
{
struct cls_match *rule, *prev, *next, *head;
- struct cls_partition *partition;
struct cls_conjunction_set *conj_set;
struct cls_subtable *subtable;
- int i;
uint32_t basis = 0, hash, ihash[CLS_MAX_INDICES];
- uint8_t prev_be64ofs = 0;
+ unsigned int mask_offset;
size_t n_rules;
+ unsigned int i;
rule = cls_rule->cls_match;
if (!rule) {
subtable = find_subtable(cls, cls_rule->match.mask);
ovs_assert(subtable);
+ mask_offset = 0;
for (i = 0; i < subtable->n_indices; i++) {
- ihash[i] = minimatch_hash_range(&cls_rule->match, prev_be64ofs,
- subtable->index_ofs[i], &basis);
- prev_be64ofs = subtable->index_ofs[i];
+ ihash[i] = minimatch_hash_range(&cls_rule->match,
+ subtable->index_maps[i],
+ &mask_offset, &basis);
}
- hash = minimatch_hash_range(&cls_rule->match, prev_be64ofs, FLOW_U64S,
- &basis);
+ hash = minimatch_hash_range(&cls_rule->match, subtable->index_maps[i],
+ &mask_offset, &basis);
head = find_equal(subtable, cls_rule->match.flow, hash);
}
n_rules = cmap_remove(&subtable->rules, &rule->cmap_node, hash);
- partition = rule->partition;
- if (partition) {
- tag_tracker_subtract(&partition->tracker, &partition->tags,
- subtable->tag);
- if (!partition->tags) {
- cmap_remove(&cls->partitions, &partition->cmap_node,
- hash_metadata(partition->metadata));
- ovsrcu_postpone(free, partition);
- }
- }
-
if (n_rules == 0) {
destroy_subtable(cls, subtable);
} else {
bool lookup_done; /* Status of the lookup. */
uint8_t be32ofs; /* U32 offset of the field in question. */
unsigned int maskbits; /* Prefix length needed to avoid false matches. */
- union mf_value match_plens; /* Bitmask of prefix lengths with possible
- * matches. */
+ union trie_prefix match_plens; /* Bitmask of prefix lengths with possible
+ * matches. */
};
static void
struct flow *flow, struct flow_wildcards *wc,
bool allow_conjunctive_matches)
{
- const struct cls_partition *partition;
struct trie_ctx trie_ctx[CLS_MAX_TRIES];
const struct cls_match *match;
- tag_type tags;
-
/* Highest-priority flow in 'cls' that certainly matches 'flow'. */
const struct cls_match *hard = NULL;
int hard_pri = INT_MIN; /* hard ? hard->priority : INT_MIN. */
* startup. */
atomic_thread_fence(memory_order_acquire);
- /* Determine 'tags' such that, if 'subtable->tag' doesn't intersect them,
- * then 'flow' cannot possibly match in 'subtable':
- *
- * - If flow->metadata maps to a given 'partition', then we can use
- * 'tags' for 'partition->tags'.
- *
- * - If flow->metadata has no partition, then no rule in 'cls' has an
- * exact-match for flow->metadata. That means that we don't need to
- * search any subtable that includes flow->metadata in its mask.
- *
- * In either case, we always need to search any cls_subtables that do not
- * include flow->metadata in its mask. One way to do that would be to
- * check the "cls_subtable"s explicitly for that, but that would require an
- * extra branch per subtable. Instead, we mark such a cls_subtable's
- * 'tags' as TAG_ALL and make sure that 'tags' is never empty. This means
- * that 'tags' always intersects such a cls_subtable's 'tags', so we don't
- * need a special case.
- */
- partition = (cmap_is_empty(&cls->partitions)
- ? NULL
- : find_partition(cls, flow->metadata,
- hash_metadata(flow->metadata)));
- tags = partition ? partition->tags : TAG_ARBITRARY;
-
/* Initialize trie contexts for find_match_wc(). */
for (int i = 0; i < cls->n_tries; i++) {
trie_ctx_init(&trie_ctx[i], &cls->tries[i]);
&cls->subtables) {
struct cls_conjunction_set *conj_set;
- /* Skip subtables not in our partition. */
- if (!tag_intersects(tags, subtable->tag)) {
- continue;
- }
-
/* Skip subtables with no match, or where the match is lower-priority
* than some certain match we've already found. */
match = find_match_wc(subtable, version, flow, trie_ctx, cls->n_tries,
return NULL;
}
+/* Initializes 'map' with a subset of 'miniflow''s maps that includes only the
+ * portions with u64-offset 'i' such that 'start' <= i < 'end'. Does not copy
+ * any data from 'miniflow' to 'map'. */
+static struct flowmap
+miniflow_get_map_in_range(const struct miniflow *miniflow, uint8_t start,
+ uint8_t end)
+{
+ struct flowmap map;
+ size_t ofs = 0;
+
+ map = miniflow->map;
+
+ /* Clear the bits before 'start'. */
+ while (start >= MAP_T_BITS) {
+ start -= MAP_T_BITS;
+ ofs += MAP_T_BITS;
+ map.bits[start / MAP_T_BITS] = 0;
+ }
+ if (start > 0) {
+ flowmap_clear(&map, ofs, start);
+ }
+
+ /* Clear the bits starting at 'end'. */
+ if (end < FLOW_U64S) {
+ /* flowmap_clear() can handle at most MAP_T_BITS at a time. */
+ ovs_assert(FLOW_U64S - end <= MAP_T_BITS);
+ flowmap_clear(&map, end, FLOW_U64S - end);
+ }
+ return map;
+}
+
/* The new subtable will be visible to the readers only after this. */
static struct cls_subtable *
insert_subtable(struct classifier *cls, const struct minimask *mask)
uint32_t hash = minimask_hash(mask, 0);
struct cls_subtable *subtable;
int i, index = 0;
- struct flow_wildcards old, new;
+ struct flowmap stage_map;
uint8_t prev;
- int count = count_1bits(mask->masks.map);
+ size_t count = miniflow_n_values(&mask->masks);
subtable = xzalloc(sizeof *subtable + MINIFLOW_VALUES_SIZE(count));
cmap_init(&subtable->rules);
&mask->masks, count);
/* Init indices for segmented lookup, if any. */
- flow_wildcards_init_catchall(&new);
- old = new;
prev = 0;
for (i = 0; i < cls->n_flow_segments; i++) {
- flow_wildcards_fold_minimask_range(&new, mask, prev,
- cls->flow_segments[i]);
+ stage_map = miniflow_get_map_in_range(&mask->masks, prev,
+ cls->flow_segments[i]);
/* Add an index if it adds mask bits. */
- if (!flow_wildcards_equal(&new, &old)) {
+ if (!flowmap_is_empty(stage_map)) {
cmap_init(&subtable->indices[index]);
- *CONST_CAST(uint8_t *, &subtable->index_ofs[index])
- = cls->flow_segments[i];
+ *CONST_CAST(struct flowmap *, &subtable->index_maps[index])
+ = stage_map;
index++;
- old = new;
}
prev = cls->flow_segments[i];
}
- /* Check if the rest of the subtable's mask adds any bits,
+ /* Map for the final stage. */
+ *CONST_CAST(struct flowmap *, &subtable->index_maps[index])
+ = miniflow_get_map_in_range(&mask->masks, prev, FLOW_U64S);
+ /* Check if the final stage adds any bits,
* and remove the last index if it doesn't. */
if (index > 0) {
- flow_wildcards_fold_minimask_range(&new, mask, prev, FLOW_U64S);
- if (flow_wildcards_equal(&new, &old)) {
+ if (flowmap_equal(subtable->index_maps[index],
+ subtable->index_maps[index - 1])) {
--index;
- *CONST_CAST(uint8_t *, &subtable->index_ofs[index]) = 0;
cmap_destroy(&subtable->indices[index]);
}
}
*CONST_CAST(uint8_t *, &subtable->n_indices) = index;
- *CONST_CAST(tag_type *, &subtable->tag) =
- (minimask_get_metadata_mask(mask) == OVS_BE64_MAX
- ? tag_create_deterministic(hash)
- : TAG_ALL);
-
for (i = 0; i < cls->n_tries; i++) {
subtable->trie_plen[i] = minimask_get_prefix_len(mask,
cls->tries[i].field);
ovsrcu_postpone(free, subtable);
}
-struct range {
- uint8_t start;
- uint8_t end;
-};
-
static unsigned int be_get_bit_at(const ovs_be32 value[], unsigned int ofs);
/* Return 'true' if can skip rest of the subtable based on the prefix trie
static inline bool
check_tries(struct trie_ctx trie_ctx[CLS_MAX_TRIES], unsigned int n_tries,
const unsigned int field_plen[CLS_MAX_TRIES],
- const struct range ofs, const struct flow *flow,
+ const struct flowmap range_map, const struct flow *flow,
struct flow_wildcards *wc)
{
int j;
* fields using the prefix tries. The trie checks are done only as
* needed to avoid folding in additional bits to the wildcards mask. */
for (j = 0; j < n_tries; j++) {
- /* Is the trie field relevant for this subtable? */
- if (field_plen[j]) {
+ /* Is the trie field relevant for this subtable, and
+ is the trie field within the current range of fields? */
+ if (field_plen[j] &&
+ flowmap_is_set(&range_map, trie_ctx[j].be32ofs / 2)) {
struct trie_ctx *ctx = &trie_ctx[j];
- uint8_t be32ofs = ctx->be32ofs;
- uint8_t be64ofs = be32ofs / 2;
-
- /* Is the trie field within the current range of fields? */
- if (be64ofs >= ofs.start && be64ofs < ofs.end) {
- /* On-demand trie lookup. */
- if (!ctx->lookup_done) {
- memset(&ctx->match_plens, 0, sizeof ctx->match_plens);
- ctx->maskbits = trie_lookup(ctx->trie, flow,
- &ctx->match_plens);
- ctx->lookup_done = true;
+
+ /* On-demand trie lookup. */
+ if (!ctx->lookup_done) {
+ memset(&ctx->match_plens, 0, sizeof ctx->match_plens);
+ ctx->maskbits = trie_lookup(ctx->trie, flow, &ctx->match_plens);
+ ctx->lookup_done = true;
+ }
+ /* Possible to skip the rest of the subtable if subtable's
+ * prefix on the field is not included in the lookup result. */
+ if (!be_get_bit_at(&ctx->match_plens.be32, field_plen[j] - 1)) {
+ /* We want the trie lookup to never result in unwildcarding
+ * any bits that would not be unwildcarded otherwise.
+ * Since the trie is shared by the whole classifier, it is
+ * possible that the 'maskbits' contain bits that are
+ * irrelevant for the partition relevant for the current
+ * packet. Hence the checks below. */
+
+ /* Check that the trie result will not unwildcard more bits
+ * than this subtable would otherwise. */
+ if (ctx->maskbits <= field_plen[j]) {
+ /* Unwildcard the bits and skip the rest. */
+ mask_set_prefix_bits(wc, ctx->be32ofs, ctx->maskbits);
+ /* Note: Prerequisite already unwildcarded, as the only
+ * prerequisite of the supported trie lookup fields is
+ * the ethertype, which is always unwildcarded. */
+ return true;
}
- /* Possible to skip the rest of the subtable if subtable's
- * prefix on the field is not included in the lookup result. */
- if (!be_get_bit_at(&ctx->match_plens.be32, field_plen[j] - 1)) {
- /* We want the trie lookup to never result in unwildcarding
- * any bits that would not be unwildcarded otherwise.
- * Since the trie is shared by the whole classifier, it is
- * possible that the 'maskbits' contain bits that are
- * irrelevant for the partition relevant for the current
- * packet. Hence the checks below. */
-
- /* Check that the trie result will not unwildcard more bits
- * than this subtable would otherwise. */
- if (ctx->maskbits <= field_plen[j]) {
- /* Unwildcard the bits and skip the rest. */
- mask_set_prefix_bits(wc, be32ofs, ctx->maskbits);
- /* Note: Prerequisite already unwildcarded, as the only
- * prerequisite of the supported trie lookup fields is
- * the ethertype, which is always unwildcarded. */
- return true;
- }
- /* Can skip if the field is already unwildcarded. */
- if (mask_prefix_bits_set(wc, be32ofs, ctx->maskbits)) {
- return true;
- }
+ /* Can skip if the field is already unwildcarded. */
+ if (mask_prefix_bits_set(wc, ctx->be32ofs, ctx->maskbits)) {
+ return true;
}
}
}
const struct minimask *mask,
const struct flow *target)
{
- const uint64_t *flowp = flow->values;
- const uint64_t *maskp = mask->masks.values;
- int idx;
+ const uint64_t *flowp = miniflow_get_values(flow);
+ const uint64_t *maskp = miniflow_get_values(&mask->masks);
+ const uint64_t *target_u64 = (const uint64_t *)target;
+ map_t map;
- MAP_FOR_EACH_INDEX(idx, mask->masks.map) {
- uint64_t diff = (*flowp++ ^ flow_u64_value(target, idx)) & *maskp++;
+ FLOWMAP_FOR_EACH_MAP (map, mask->masks.map) {
+ size_t idx;
- if (diff) {
- return false;
+ MAP_FOR_EACH_INDEX (idx, map) {
+ if ((*flowp++ ^ target_u64[idx]) & *maskp++) {
+ return false;
+ }
}
+ target_u64 += MAP_T_BITS;
}
-
return true;
}
const struct flow *target,
struct flow_wildcards *wc)
{
- const uint64_t *flowp = flow->values;
- const uint64_t *maskp = mask->masks.values;
- int idx;
-
- MAP_FOR_EACH_INDEX(idx, mask->masks.map) {
- uint64_t mask = *maskp++;
- uint64_t diff = (*flowp++ ^ flow_u64_value(target, idx)) & mask;
-
- if (diff) {
- /* Only unwildcard if none of the differing bits is already
- * exact-matched. */
- if (!(flow_u64_value(&wc->masks, idx) & diff)) {
- /* Keep one bit of the difference. The selected bit may be
- * different in big-endian v.s. little-endian systems. */
- *flow_u64_lvalue(&wc->masks, idx) |= rightmost_1bit(diff);
+ const uint64_t *flowp = miniflow_get_values(flow);
+ const uint64_t *maskp = miniflow_get_values(&mask->masks);
+ const uint64_t *target_u64 = (const uint64_t *)target;
+ uint64_t *wc_u64 = (uint64_t *)&wc->masks;
+ uint64_t diff;
+ size_t idx;
+ map_t map;
+
+ FLOWMAP_FOR_EACH_MAP (map, mask->masks.map) {
+ MAP_FOR_EACH_INDEX(idx, map) {
+ uint64_t msk = *maskp++;
+
+ diff = (*flowp++ ^ target_u64[idx]) & msk;
+ if (diff) {
+ goto out;
}
- return false;
+
+ /* Fill in the bits that were looked at. */
+ wc_u64[idx] |= msk;
}
- /* Fill in the bits that were looked at. */
- *flow_u64_lvalue(&wc->masks, idx) |= mask;
+ target_u64 += MAP_T_BITS;
+ wc_u64 += MAP_T_BITS;
}
-
return true;
-}
-/* Unwildcard the fields looked up so far, if any. */
-static void
-fill_range_wc(const struct cls_subtable *subtable, struct flow_wildcards *wc,
- uint8_t to)
-{
- if (to) {
- flow_wildcards_fold_minimask_range(wc, &subtable->mask, 0, to);
+out:
+ /* Only unwildcard if none of the differing bits is already
+ * exact-matched. */
+ if (!(wc_u64[idx] & diff)) {
+ /* Keep one bit of the difference. The selected bit may be
+ * different in big-endian v.s. little-endian systems. */
+ wc_u64[idx] |= rightmost_1bit(diff);
}
+ return false;
}
static const struct cls_match *
const struct flow *flow, struct trie_ctx trie_ctx[CLS_MAX_TRIES],
unsigned int n_tries, struct flow_wildcards *wc)
{
- uint32_t basis = 0, hash;
- const struct cls_match *rule = NULL;
- int i;
- struct range ofs;
-
if (OVS_UNLIKELY(!wc)) {
return find_match(subtable, version, flow,
flow_hash_in_minimask(flow, &subtable->mask, 0));
}
- ofs.start = 0;
+ uint32_t basis = 0, hash;
+ const struct cls_match *rule = NULL;
+ struct flowmap stages_map = FLOWMAP_EMPTY_INITIALIZER;
+ unsigned int mask_offset = 0;
+ int i;
+
/* Try to finish early by checking fields in segments. */
for (i = 0; i < subtable->n_indices; i++) {
const struct cmap_node *inode;
- ofs.end = subtable->index_ofs[i];
-
- if (check_tries(trie_ctx, n_tries, subtable->trie_plen, ofs, flow,
- wc)) {
+ if (check_tries(trie_ctx, n_tries, subtable->trie_plen,
+ subtable->index_maps[i], flow, wc)) {
/* 'wc' bits for the trie field set, now unwildcard the preceding
* bits used so far. */
- fill_range_wc(subtable, wc, ofs.start);
- return NULL;
+ goto no_match;
}
- hash = flow_hash_in_minimask_range(flow, &subtable->mask, ofs.start,
- ofs.end, &basis);
+
+ /* Accumulate the map used so far. */
+ stages_map = flowmap_or(stages_map, subtable->index_maps[i]);
+
+ hash = flow_hash_in_minimask_range(flow, &subtable->mask,
+ subtable->index_maps[i],
+ &mask_offset, &basis);
+
inode = cmap_find(&subtable->indices[i], hash);
if (!inode) {
- /* No match, can stop immediately, but must fold in the bits
- * used in lookup so far. */
- fill_range_wc(subtable, wc, ofs.end);
- return NULL;
+ goto no_match;
}
/* If we have narrowed down to a single rule already, check whether
}
return NULL;
}
- ofs.start = ofs.end;
}
- ofs.end = FLOW_U64S;
/* Trie check for the final range. */
- if (check_tries(trie_ctx, n_tries, subtable->trie_plen, ofs, flow, wc)) {
- fill_range_wc(subtable, wc, ofs.start);
- return NULL;
+ if (check_tries(trie_ctx, n_tries, subtable->trie_plen,
+ subtable->index_maps[i], flow, wc)) {
+ goto no_match;
}
- hash = flow_hash_in_minimask_range(flow, &subtable->mask, ofs.start,
- ofs.end, &basis);
+ hash = flow_hash_in_minimask_range(flow, &subtable->mask,
+ subtable->index_maps[i],
+ &mask_offset, &basis);
rule = find_match(subtable, version, flow, hash);
if (!rule && subtable->ports_mask_len) {
- /* Ports are always part of the final range, if any.
- * No match was found for the ports. Use the ports trie to figure out
- * which ports bits to unwildcard. */
+ /* The final stage had ports, but there was no match. Instead of
+ * unwildcarding all the ports bits, use the ports trie to figure out a
+ * smaller set of bits to unwildcard. */
unsigned int mbits;
ovs_be32 value, plens, mask;
((OVS_FORCE ovs_be32 *)&wc->masks)[TP_PORTS_OFS32] |=
mask & be32_prefix_mask(mbits);
- /* Unwildcard all bits in the mask upto the ports, as they were used
- * to determine there is no match. */
- fill_range_wc(subtable, wc, TP_PORTS_OFS64);
- return NULL;
+ goto no_match;
}
/* Must unwildcard all the fields, as they were looked at. */
flow_wildcards_fold_minimask(wc, &subtable->mask);
return rule;
+
+no_match:
+ /* Unwildcard the bits in stages so far, as they were used in determining
+ * there is no match. */
+ flow_wildcards_fold_minimask_in_map(wc, &subtable->mask, stages_map);
+ return NULL;
}
static struct cls_match *
static unsigned int
trie_lookup(const struct cls_trie *trie, const struct flow *flow,
- union mf_value *plens)
+ union trie_prefix *plens)
{
const struct mf_field *mf = trie->field;
static const ovs_be32 *
minimatch_get_prefix(const struct minimatch *match, const struct mf_field *mf)
{
- return (OVS_FORCE const ovs_be32 *)
- (match->flow->values
- + count_1bits(match->flow->map &
- ((UINT64_C(1) << mf->flow_be32ofs / 2) - 1)))
+ size_t u64_ofs = mf->flow_be32ofs / 2;
+
+ return (OVS_FORCE const ovs_be32 *)miniflow_get__(match->flow, u64_ofs)
+ (mf->flow_be32ofs & 1);
}
trie_remove_prefix(rcu_trie_ptr *root, const ovs_be32 *prefix, int mlen)
{
struct trie_node *node;
- rcu_trie_ptr *edges[sizeof(union mf_value) * 8];
+ rcu_trie_ptr *edges[sizeof(union trie_prefix) * CHAR_BIT];
int depth = 0, ofs = 0;
/* Walk the tree. */
projects / cascardo / ovs.git / blobdiff