#include <linux/if_vlan.h>
#include <net/llc_pdu.h>
#include <linux/kernel.h>
-#include <linux/jhash.h>
+#include <linux/hash.h>
#include <linux/jiffies.h>
#include <linux/llc.h>
#include <linux/module.h>
#include <net/ipv6.h>
#include <net/ndisc.h>
-#include "datapath.h"
#include "vlan.h"
#define TBL_MIN_BUCKETS 1024
*d++ = *s++ & *m++;
}
-struct sw_flow *ovs_flow_alloc(void)
+struct sw_flow *ovs_flow_alloc(bool percpu_stats)
{
struct sw_flow *flow;
+ int cpu;
flow = kmem_cache_alloc(flow_cache, GFP_KERNEL);
if (!flow)
return ERR_PTR(-ENOMEM);
- spin_lock_init(&flow->lock);
flow->sf_acts = NULL;
flow->mask = NULL;
+ flow->stats.is_percpu = percpu_stats;
+
+ if (!percpu_stats) {
+ flow->stats.stat = kzalloc(sizeof(*flow->stats.stat), GFP_KERNEL);
+ if (!flow->stats.stat)
+ goto err;
+
+ spin_lock_init(&flow->stats.stat->lock);
+ } else {
+ flow->stats.cpu_stats = alloc_percpu(struct flow_stats);
+ if (!flow->stats.cpu_stats)
+ goto err;
+
+ for_each_possible_cpu(cpu) {
+ struct flow_stats *cpu_stats;
+
+ cpu_stats = per_cpu_ptr(flow->stats.cpu_stats, cpu);
+ spin_lock_init(&cpu_stats->lock);
+ }
+ }
return flow;
+err:
+ kmem_cache_free(flow_cache, flow);
+ return ERR_PTR(-ENOMEM);
}
int ovs_flow_tbl_count(struct flow_table *table)
static void flow_free(struct sw_flow *flow)
{
kfree((struct sf_flow_acts __force *)flow->sf_acts);
+ if (flow->stats.is_percpu)
+ free_percpu(flow->stats.cpu_stats);
+ else
+ kfree(flow->stats.stat);
kmem_cache_free(flow_cache, flow);
}
kfree(mask);
}
-static void flow_mask_del_ref(struct sw_flow_mask *mask, bool deferred)
+void ovs_flow_free(struct sw_flow *flow, bool deferred)
{
- if (!mask)
+ if (!flow)
return;
- BUG_ON(!mask->ref_count);
- mask->ref_count--;
+ ASSERT_OVSL();
- if (!mask->ref_count) {
- list_del_rcu(&mask->list);
- if (deferred)
- call_rcu(&mask->rcu, rcu_free_sw_flow_mask_cb);
- else
- kfree(mask);
- }
-}
+ if (flow->mask) {
+ struct sw_flow_mask *mask = flow->mask;
-void ovs_flow_free(struct sw_flow *flow, bool deferred)
-{
- if (!flow)
- return;
+ BUG_ON(!mask->ref_count);
+ mask->ref_count--;
- flow_mask_del_ref(flow->mask, deferred);
+ if (!mask->ref_count) {
+ list_del_rcu(&mask->list);
+ if (deferred)
+ call_rcu(&mask->rcu, rcu_free_sw_flow_mask_cb);
+ else
+ kfree(mask);
+ }
+ }
if (deferred)
call_rcu(&flow->rcu, rcu_free_flow_callback);
flex_array_free(buckets);
}
+
static void __table_instance_destroy(struct table_instance *ti)
{
- int i;
-
- if (ti->keep_flows)
- goto skip_flows;
-
- for (i = 0; i < ti->n_buckets; i++) {
- struct sw_flow *flow;
- struct hlist_head *head = flex_array_get(ti->buckets, i);
- struct hlist_node *n;
- int ver = ti->node_ver;
-
- hlist_for_each_entry_safe(flow, n, head, hash_node[ver]) {
- hlist_del(&flow->hash_node[ver]);
- ovs_flow_free(flow, false);
- }
- }
-
-skip_flows:
free_buckets(ti->buckets);
kfree(ti);
}
static void table_instance_destroy(struct table_instance *ti, bool deferred)
{
+ int i;
+
if (!ti)
return;
+ if (ti->keep_flows)
+ goto skip_flows;
+
+ for (i = 0; i < ti->n_buckets; i++) {
+ struct sw_flow *flow;
+ struct hlist_head *head = flex_array_get(ti->buckets, i);
+ struct hlist_node *n;
+ int ver = ti->node_ver;
+
+ hlist_for_each_entry_safe(flow, n, head, hash_node[ver]) {
+ hlist_del_rcu(&flow->hash_node[ver]);
+ ovs_flow_free(flow, deferred);
+ }
+ }
+
+skip_flows:
if (deferred)
call_rcu(&ti->rcu, flow_tbl_destroy_rcu_cb);
else
__table_instance_destroy(ti);
}
-void ovs_flow_tbl_destroy(struct flow_table *table)
+void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred)
{
struct table_instance *ti = ovsl_dereference(table->ti);
- table_instance_destroy(ti, false);
+ table_instance_destroy(ti, deferred);
}
struct sw_flow *ovs_flow_tbl_dump_next(struct table_instance *ti,
/* Make sure number of hash bytes are multiple of u32. */
BUILD_BUG_ON(sizeof(long) % sizeof(u32));
- return jhash2(hash_key, hash_u32s, 0);
+ return arch_fast_hash2(hash_key, hash_u32s, 0);
}
static int flow_key_start(const struct sw_flow_key *key)
hash = flow_hash(&masked_key, key_start, key_end);
head = find_bucket(ti, hash);
hlist_for_each_entry_rcu(flow, head, hash_node[ti->node_ver]) {
- if (flow->mask == mask &&
+ if (flow->mask == mask && flow->hash == hash &&
flow_cmp_masked_key(flow, &masked_key,
key_start, key_end))
return flow;
return NULL;
}
-struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *tbl,
- const struct sw_flow_key *key)
+struct sw_flow *ovs_flow_tbl_lookup_stats(struct flow_table *tbl,
+ const struct sw_flow_key *key,
+ u32 *n_mask_hit)
{
- struct table_instance *ti = rcu_dereference(tbl->ti);
+ struct table_instance *ti = rcu_dereference_ovsl(tbl->ti);
struct sw_flow_mask *mask;
struct sw_flow *flow;
+ *n_mask_hit = 0;
list_for_each_entry_rcu(mask, &tbl->mask_list, list) {
+ (*n_mask_hit)++;
flow = masked_flow_lookup(ti, key, mask);
if (flow) /* Found */
return flow;
return NULL;
}
+struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *tbl,
+ const struct sw_flow_key *key)
+{
+ u32 __always_unused n_mask_hit;
+
+ return ovs_flow_tbl_lookup_stats(tbl, key, &n_mask_hit);
+}
+
+int ovs_flow_tbl_num_masks(const struct flow_table *table)
+{
+ struct sw_flow_mask *mask;
+ int num = 0;
+
+ list_for_each_entry(mask, &table->mask_list, list)
+ num++;
+
+ return num;
+}
+
static struct table_instance *table_instance_expand(struct table_instance *ti)
{
return table_instance_rehash(ti, ti->n_buckets * 2);
mask = kmalloc(sizeof(*mask), GFP_KERNEL);
if (mask)
- mask->ref_count = 0;
+ mask->ref_count = 1;
return mask;
}
-static void mask_add_ref(struct sw_flow_mask *mask)
-{
- mask->ref_count++;
-}
-
static bool mask_equal(const struct sw_flow_mask *a,
const struct sw_flow_mask *b)
{
return NULL;
}
-/**
- * add a new mask into the mask list.
- * The caller needs to make sure that 'mask' is not the same
- * as any masks that are already on the list.
- */
+/* Add 'mask' into the mask list, if it is not already there. */
static int flow_mask_insert(struct flow_table *tbl, struct sw_flow *flow,
struct sw_flow_mask *new)
{
mask->key = new->key;
mask->range = new->range;
list_add_rcu(&mask->list, &tbl->mask_list);
+ } else {
+ BUG_ON(!mask->ref_count);
+ mask->ref_count++;
}
- mask_add_ref(mask);
flow->mask = mask;
return 0;
}