}
static struct cls_match *
-cls_match_alloc(const struct cls_rule *rule,
+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);
ovsrcu_init(&cls_match->next, NULL);
*CONST_CAST(const struct cls_rule **, &cls_match->cls_rule) = rule;
*CONST_CAST(int *, &cls_match->priority) = rule->priority;
- *CONST_CAST(cls_version_t *, &cls_match->add_version) = rule->version;
- atomic_init(&cls_match->remove_version, rule->version); /* Initially
- invisible. */
+ *CONST_CAST(cls_version_t *, &cls_match->add_version) = version;
+ atomic_init(&cls_match->remove_version, version); /* Initially
+ * invisible. */
miniflow_clone_inline(CONST_CAST(struct miniflow *, &cls_match->flow),
&rule->match.flow, count);
ovsrcu_set_hidden(&cls_match->conj_set,
/* cls_rule. */
static inline void
-cls_rule_init__(struct cls_rule *rule, unsigned int priority,
- cls_version_t version)
+cls_rule_init__(struct cls_rule *rule, unsigned int priority)
{
rculist_init(&rule->node);
*CONST_CAST(int *, &rule->priority) = priority;
- *CONST_CAST(cls_version_t *, &rule->version) = version;
rule->cls_match = NULL;
}
* Clients should not use priority INT_MIN. (OpenFlow uses priorities between
* 0 and UINT16_MAX, inclusive.) */
void
-cls_rule_init(struct cls_rule *rule, const struct match *match, int priority,
- cls_version_t version)
+cls_rule_init(struct cls_rule *rule, const struct match *match, int priority)
{
- cls_rule_init__(rule, priority, version);
+ cls_rule_init__(rule, priority);
minimatch_init(CONST_CAST(struct minimatch *, &rule->match), match);
}
/* Same as cls_rule_init() for initialization from a "struct minimatch". */
void
cls_rule_init_from_minimatch(struct cls_rule *rule,
- const struct minimatch *match, int priority,
- cls_version_t version)
+ const struct minimatch *match, int priority)
{
- cls_rule_init__(rule, priority, version);
+ cls_rule_init__(rule, priority);
minimatch_clone(CONST_CAST(struct minimatch *, &rule->match), match);
}
-/* Initializes 'dst' as a copy of 'src', but with 'version'.
- *
- * The caller must eventually destroy 'dst' with cls_rule_destroy(). */
-void
-cls_rule_clone_in_version(struct cls_rule *dst, const struct cls_rule *src,
- cls_version_t version)
-{
- cls_rule_init__(dst, src->priority, version);
- minimatch_clone(CONST_CAST(struct minimatch *, &dst->match), &src->match);
-}
-
/* Initializes 'dst' as a copy of 'src'.
*
* The caller must eventually destroy 'dst' with cls_rule_destroy(). */
void
cls_rule_clone(struct cls_rule *dst, const struct cls_rule *src)
{
- cls_rule_clone_in_version(dst, src, src->version);
+ cls_rule_init__(dst, src->priority);
+ minimatch_clone(CONST_CAST(struct minimatch *, &dst->match), &src->match);
}
/* Initializes 'dst' with the data in 'src', destroying 'src'.
void
cls_rule_move(struct cls_rule *dst, struct cls_rule *src)
{
- cls_rule_init__(dst, src->priority, src->version);
+ cls_rule_init__(dst, src->priority);
minimatch_move(CONST_CAST(struct minimatch *, &dst->match),
CONST_CAST(struct minimatch *, &src->match));
}
cls_match_set_remove_version(rule->cls_match, remove_version);
}
-/* This undoes the change made by cls_rule_make_invisible_after_version().
+/* This undoes the change made by cls_rule_make_invisible_in_version().
*
* 'rule' must be in a classifier. */
void
cmap_replace(&subtable->rules, &head->cmap_node, &new->cmap_node, hash);
}
-/* Inserts 'rule' into 'cls'. Until 'rule' is removed from 'cls', the caller
- * must not modify or free it.
+/* Inserts 'rule' into 'cls' in 'version'. Until 'rule' is removed from 'cls',
+ * the caller must not modify or free it.
*
* If 'cls' already contains an identical rule (including wildcards, values of
- * fixed fields, and priority), replaces the old rule by 'rule' and returns the
- * rule that was replaced. The caller takes ownership of the returned rule and
- * is thus responsible for destroying it with cls_rule_destroy(), after RCU
- * grace period has passed (see ovsrcu_postpone()).
+ * fixed fields, and priority) that is visible in 'version', replaces the old
+ * rule by 'rule' and returns the rule that was replaced. The caller takes
+ * ownership of the returned rule and is thus responsible for destroying it
+ * with cls_rule_destroy(), after RCU grace period has passed (see
+ * ovsrcu_postpone()).
*
* Returns NULL if 'cls' does not contain a rule with an identical key, after
* inserting the new rule. In this case, no rules are displaced by the new
*/
const struct cls_rule *
classifier_replace(struct classifier *cls, const struct cls_rule *rule,
+ cls_version_t version,
const struct cls_conjunction *conjs, size_t n_conjs)
{
struct cls_match *new;
int i;
/* 'new' is initially invisible to lookups. */
- new = cls_match_alloc(rule, conjs, n_conjs);
+ new = cls_match_alloc(rule, version, conjs, n_conjs);
CONST_CAST(struct cls_rule *, rule)->cls_match = new;
* such a rule. */
void
classifier_insert(struct classifier *cls, const struct cls_rule *rule,
- const struct cls_conjunction conj[], size_t n_conj)
+ cls_version_t version, const struct cls_conjunction conj[],
+ size_t n_conj)
{
const struct cls_rule *displaced_rule
- = classifier_replace(cls, rule, conj, n_conj);
+ = classifier_replace(cls, rule, version, conj, n_conj);
ovs_assert(!displaced_rule);
}
}
/* Finds and returns a rule in 'cls' with exactly the same priority and
- * matching criteria as 'target', and that is visible in 'target->version.
+ * matching criteria as 'target', and that is visible in 'version'.
* Only one such rule may ever exist. Returns a null pointer if 'cls' doesn't
* contain an exact match. */
const struct cls_rule *
classifier_find_rule_exactly(const struct classifier *cls,
- const struct cls_rule *target)
+ const struct cls_rule *target,
+ cls_version_t version)
{
const struct cls_match *head, *rule;
const struct cls_subtable *subtable;
break; /* Not found. */
}
if (rule->priority == target->priority
- && cls_match_visible_in_version(rule, target->version)) {
+ && cls_match_visible_in_version(rule, version)) {
return rule->cls_rule;
}
}
const struct cls_rule *retval;
struct cls_rule cr;
- cls_rule_init(&cr, target, priority, version);
- retval = classifier_find_rule_exactly(cls, &cr);
+ cls_rule_init(&cr, target, priority);
+ retval = classifier_find_rule_exactly(cls, &cr, version);
cls_rule_destroy(&cr);
return retval;
}
-/* Checks if 'target' would overlap any other rule in 'cls'. Two rules are
- * considered to overlap if both rules have the same priority and a packet
- * could match both, and if both rules are visible in the same version.
+/* Checks if 'target' would overlap any other rule in 'cls' in 'version'. Two
+ * rules are considered to overlap if both rules have the same priority and a
+ * packet could match both, and if both rules are visible in the same version.
*
* A trivial example of overlapping rules is two rules matching disjoint sets
* of fields. E.g., if one rule matches only on port number, while another only
* dl_type could match both, if the rules also have the same priority. */
bool
classifier_rule_overlaps(const struct classifier *cls,
- const struct cls_rule *target)
+ const struct cls_rule *target, cls_version_t version)
{
struct cls_subtable *subtable;
if (rule->priority == target->priority
&& miniflow_equal_in_minimask(&target->match.flow,
&rule->match.flow, &mask)
- && cls_match_visible_in_version(rule->cls_match,
- target->version)) {
+ && cls_match_visible_in_version(rule->cls_match, version)) {
return true;
}
}
\f
/* Iteration. */
-/* Rule may only match a target if it is visible in target's version. For NULL
- * target we only return rules that are not invisible in any version. */
static bool
-rule_matches(const struct cls_rule *rule, const struct cls_rule *target)
+rule_matches(const struct cls_rule *rule, const struct cls_rule *target,
+ cls_version_t version)
{
- /* Iterators never see duplicate rules with the same priority. */
- return target
- ? (miniflow_equal_in_minimask(&rule->match.flow, &target->match.flow,
- &target->match.mask)
- && cls_match_visible_in_version(rule->cls_match, target->version))
- : !cls_match_is_eventually_invisible(rule->cls_match);
+ /* Rule may only match a target if it is visible in target's version. */
+ return cls_match_visible_in_version(rule->cls_match, version)
+ && (!target || miniflow_equal_in_minimask(&rule->match.flow,
+ &target->match.flow,
+ &target->match.mask));
}
static const struct cls_rule *
const struct cls_rule *rule;
RCULIST_FOR_EACH (rule, node, &subtable->rules_list) {
- if (rule_matches(rule, cursor->target)) {
+ if (rule_matches(rule, cursor->target, cursor->version)) {
return rule;
}
}
}
/* Initializes 'cursor' for iterating through rules in 'cls', and returns the
- * first matching cls_rule via '*pnode', or NULL if there are no matches.
+ * cursor.
*
- * - If 'target' is null, or if the 'target' is a catchall target and the
- * target's version is CLS_MAX_VERSION, the cursor will visit every rule
- * in 'cls' that is not invisible in any version.
+ * - If 'target' is null, or if the 'target' is a catchall target, the
+ * cursor will visit every rule in 'cls' that is visible in 'version'.
*
* - If 'target' is nonnull, the cursor will visit each 'rule' in 'cls'
* such that cls_rule_is_loose_match(rule, target) returns true and that
- * the rule is visible in 'target->version'.
+ * the rule is visible in 'version'.
*
* Ignores target->priority. */
struct cls_cursor
-cls_cursor_start(const struct classifier *cls, const struct cls_rule *target)
+cls_cursor_start(const struct classifier *cls, const struct cls_rule *target,
+ cls_version_t version)
{
struct cls_cursor cursor;
struct cls_subtable *subtable;
cursor.cls = cls;
- cursor.target = target && (!cls_rule_is_catchall(target)
- || target->version != CLS_MAX_VERSION)
- ? target : NULL;
+ cursor.target = target && !cls_rule_is_catchall(target) ? target : NULL;
+ cursor.version = version;
cursor.rule = NULL;
/* Find first rule. */
rule = cursor->rule;
subtable = cursor->subtable;
RCULIST_FOR_EACH_CONTINUE (rule, node, &subtable->rules_list) {
- if (rule_matches(rule, cursor->target)) {
+ if (rule_matches(rule, cursor->target, cursor->version)) {
return rule;
}
}
projects / cascardo / ovs.git / blobdiff