1) Old code was hard to maintain, due to complex lock chains.
(We probably will be able to remove some kfree_rcu() in callers)
2) Using a single timer to update all estimators does not scale.
3) Code was buggy on 32bit kernel (WRITE_ONCE() on 64bit quantity
is not supposed to work well)
In this rewrite :
- I removed the RB tree that had to be scanned in
gen_estimator_active(). qdisc dumps should be much faster.
- Each estimator has its own timer.
- Estimations are maintained in net_rate_estimator structure,
instead of dirtying the qdisc. Minor, but part of the simplification.
- Reading the estimator uses RCU and a seqcount to provide proper
support for 32bit kernels.
- We reduce memory need when estimators are not used, since
we store a pointer, instead of the bytes/packets counters.
- xt_rateest_mt() no longer has to grab a spinlock.
(In the future, xt_rateest_tg() could be switched to per cpu counters)
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
struct tcf_t tcfa_tm;
struct gnet_stats_basic_packed tcfa_bstats;
struct gnet_stats_queue tcfa_qstats;
- struct gnet_stats_rate_est64 tcfa_rate_est;
+ struct net_rate_estimator __rcu *tcfa_rate_est;
spinlock_t tcfa_lock;
struct rcu_head tcfa_rcu;
struct gnet_stats_basic_cpu __percpu *cpu_bstats;
struct u64_stats_sync syncp;
};
+struct net_rate_estimator;
+
struct gnet_dump {
spinlock_t * lock;
struct sk_buff * skb;
struct gnet_stats_basic_cpu __percpu *cpu,
struct gnet_stats_basic_packed *b);
int gnet_stats_copy_rate_est(struct gnet_dump *d,
- const struct gnet_stats_basic_packed *b,
- struct gnet_stats_rate_est64 *r);
+ struct net_rate_estimator __rcu **ptr);
int gnet_stats_copy_queue(struct gnet_dump *d,
struct gnet_stats_queue __percpu *cpu_q,
struct gnet_stats_queue *q, __u32 qlen);
int gen_new_estimator(struct gnet_stats_basic_packed *bstats,
struct gnet_stats_basic_cpu __percpu *cpu_bstats,
- struct gnet_stats_rate_est64 *rate_est,
+ struct net_rate_estimator __rcu **rate_est,
spinlock_t *stats_lock,
seqcount_t *running, struct nlattr *opt);
-void gen_kill_estimator(struct gnet_stats_basic_packed *bstats,
- struct gnet_stats_rate_est64 *rate_est);
+void gen_kill_estimator(struct net_rate_estimator __rcu **ptr);
int gen_replace_estimator(struct gnet_stats_basic_packed *bstats,
struct gnet_stats_basic_cpu __percpu *cpu_bstats,
- struct gnet_stats_rate_est64 *rate_est,
+ struct net_rate_estimator __rcu **ptr,
spinlock_t *stats_lock,
seqcount_t *running, struct nlattr *opt);
-bool gen_estimator_active(const struct gnet_stats_basic_packed *bstats,
- const struct gnet_stats_rate_est64 *rate_est);
+bool gen_estimator_active(struct net_rate_estimator __rcu **ptr);
+bool gen_estimator_read(struct net_rate_estimator __rcu **ptr,
+ struct gnet_stats_rate_est64 *sample);
#endif
#ifndef _XT_RATEEST_H
#define _XT_RATEEST_H
+#include <net/gen_stats.h>
+
struct xt_rateest {
/* keep lock and bstats on same cache line to speedup xt_rateest_tg() */
struct gnet_stats_basic_packed bstats;
spinlock_t lock;
- /* keep rstats and lock on same cache line to speedup xt_rateest_mt() */
- struct gnet_stats_rate_est64 rstats;
+
/* following fields not accessed in hot path */
+ unsigned int refcnt;
struct hlist_node list;
char name[IFNAMSIZ];
- unsigned int refcnt;
struct gnet_estimator params;
struct rcu_head rcu;
+
+ /* keep this field far away to speedup xt_rateest_mt() */
+ struct net_rate_estimator __rcu *rate_est;
};
struct xt_rateest *xt_rateest_lookup(const char *name);
struct netdev_queue *dev_queue;
- struct gnet_stats_rate_est64 rate_est;
+ struct net_rate_estimator __rcu *rate_est;
struct gnet_stats_basic_cpu __percpu *cpu_bstats;
struct gnet_stats_queue __percpu *cpu_qstats;
* 2 of the License, or (at your option) any later version.
*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ * Eric Dumazet <edumazet@google.com>
*
* Changes:
* Jamal Hadi Salim - moved it to net/core and reshulfed
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
#include <linux/init.h>
-#include <linux/rbtree.h>
#include <linux/slab.h>
+#include <linux/seqlock.h>
#include <net/sock.h>
#include <net/gen_stats.h>
-/*
- This code is NOT intended to be used for statistics collection,
- its purpose is to provide a base for statistical multiplexing
- for controlled load service.
- If you need only statistics, run a user level daemon which
- periodically reads byte counters.
-
- Unfortunately, rate estimation is not a very easy task.
- F.e. I did not find a simple way to estimate the current peak rate
- and even failed to formulate the problem 8)8)
-
- So I preferred not to built an estimator into the scheduler,
- but run this task separately.
- Ideally, it should be kernel thread(s), but for now it runs
- from timers, which puts apparent top bounds on the number of rated
- flows, has minimal overhead on small, but is enough
- to handle controlled load service, sets of aggregates.
-
- We measure rate over A=(1<<interval) seconds and evaluate EWMA:
-
- avrate = avrate*(1-W) + rate*W
-
- where W is chosen as negative power of 2: W = 2^(-ewma_log)
-
- The resulting time constant is:
-
- T = A/(-ln(1-W))
-
-
- NOTES.
-
- * avbps and avpps are scaled by 2^5.
- * both values are reported as 32 bit unsigned values. bps can
- overflow for fast links : max speed being 34360Mbit/sec
- * Minimal interval is HZ/4=250msec (it is the greatest common divisor
- for HZ=100 and HZ=1024 8)), maximal interval
- is (HZ*2^EST_MAX_INTERVAL)/4 = 8sec. Shorter intervals
- are too expensive, longer ones can be implemented
- at user level painlessly.
+/* This code is NOT intended to be used for statistics collection,
+ * its purpose is to provide a base for statistical multiplexing
+ * for controlled load service.
+ * If you need only statistics, run a user level daemon which
+ * periodically reads byte counters.
*/
-#define EST_MAX_INTERVAL 5
-
-struct gen_estimator {
- struct list_head list;
+struct net_rate_estimator {
struct gnet_stats_basic_packed *bstats;
- struct gnet_stats_rate_est64 *rate_est;
spinlock_t *stats_lock;
seqcount_t *running;
- int ewma_log;
+ struct gnet_stats_basic_cpu __percpu *cpu_bstats;
+ u8 ewma_log;
+ u8 intvl_log; /* period : (250ms << intvl_log) */
+
+ seqcount_t seq;
u32 last_packets;
- unsigned long avpps;
u64 last_bytes;
+
+ u64 avpps;
u64 avbps;
- struct rcu_head e_rcu;
- struct rb_node node;
- struct gnet_stats_basic_cpu __percpu *cpu_bstats;
- struct rcu_head head;
-};
-struct gen_estimator_head {
- unsigned long next_jiffies;
- struct timer_list timer;
- struct list_head list;
+ unsigned long next_jiffies;
+ struct timer_list timer;
+ struct rcu_head rcu;
};
-static struct gen_estimator_head elist[EST_MAX_INTERVAL+1];
-
-/* Protects against NULL dereference */
-static DEFINE_RWLOCK(est_lock);
-
-/* Protects against soft lockup during large deletion */
-static struct rb_root est_root = RB_ROOT;
-static DEFINE_SPINLOCK(est_tree_lock);
-
-static void est_timer(unsigned long arg)
+static void est_fetch_counters(struct net_rate_estimator *e,
+ struct gnet_stats_basic_packed *b)
{
- int idx = (int)arg;
- struct gen_estimator *e;
+ if (e->stats_lock)
+ spin_lock(e->stats_lock);
- rcu_read_lock();
- list_for_each_entry_rcu(e, &elist[idx].list, list) {
- struct gnet_stats_basic_packed b = {0};
- unsigned long rate;
- u64 brate;
-
- if (e->stats_lock)
- spin_lock(e->stats_lock);
- read_lock(&est_lock);
- if (e->bstats == NULL)
- goto skip;
-
- __gnet_stats_copy_basic(e->running, &b, e->cpu_bstats, e->bstats);
-
- brate = (b.bytes - e->last_bytes)<<(7 - idx);
- e->last_bytes = b.bytes;
- e->avbps += (brate >> e->ewma_log) - (e->avbps >> e->ewma_log);
- WRITE_ONCE(e->rate_est->bps, (e->avbps + 0xF) >> 5);
-
- rate = b.packets - e->last_packets;
- rate <<= (7 - idx);
- e->last_packets = b.packets;
- e->avpps += (rate >> e->ewma_log) - (e->avpps >> e->ewma_log);
- WRITE_ONCE(e->rate_est->pps, (e->avpps + 0xF) >> 5);
-skip:
- read_unlock(&est_lock);
- if (e->stats_lock)
- spin_unlock(e->stats_lock);
- }
+ __gnet_stats_copy_basic(e->running, b, e->cpu_bstats, e->bstats);
- if (!list_empty(&elist[idx].list)) {
- elist[idx].next_jiffies += ((HZ/4) << idx);
+ if (e->stats_lock)
+ spin_unlock(e->stats_lock);
- if (unlikely(time_after_eq(jiffies, elist[idx].next_jiffies))) {
- /* Ouch... timer was delayed. */
- elist[idx].next_jiffies = jiffies + 1;
- }
- mod_timer(&elist[idx].timer, elist[idx].next_jiffies);
- }
- rcu_read_unlock();
}
-static void gen_add_node(struct gen_estimator *est)
+static void est_timer(unsigned long arg)
{
- struct rb_node **p = &est_root.rb_node, *parent = NULL;
+ struct net_rate_estimator *est = (struct net_rate_estimator *)arg;
+ struct gnet_stats_basic_packed b;
+ u64 rate, brate;
- while (*p) {
- struct gen_estimator *e;
+ est_fetch_counters(est, &b);
+ brate = (b.bytes - est->last_bytes) << (8 - est->ewma_log);
+ brate -= (est->avbps >> est->ewma_log);
- parent = *p;
- e = rb_entry(parent, struct gen_estimator, node);
+ rate = (u64)(b.packets - est->last_packets) << (8 - est->ewma_log);
+ rate -= (est->avpps >> est->ewma_log);
- if (est->bstats > e->bstats)
- p = &parent->rb_right;
- else
- p = &parent->rb_left;
- }
- rb_link_node(&est->node, parent, p);
- rb_insert_color(&est->node, &est_root);
-}
-
-static
-struct gen_estimator *gen_find_node(const struct gnet_stats_basic_packed *bstats,
- const struct gnet_stats_rate_est64 *rate_est)
-{
- struct rb_node *p = est_root.rb_node;
+ write_seqcount_begin(&est->seq);
+ est->avbps += brate;
+ est->avpps += rate;
+ write_seqcount_end(&est->seq);
- while (p) {
- struct gen_estimator *e;
+ est->last_bytes = b.bytes;
+ est->last_packets = b.packets;
- e = rb_entry(p, struct gen_estimator, node);
+ est->next_jiffies += ((HZ/4) << est->intvl_log);
- if (bstats > e->bstats)
- p = p->rb_right;
- else if (bstats < e->bstats || rate_est != e->rate_est)
- p = p->rb_left;
- else
- return e;
+ if (unlikely(time_after_eq(jiffies, est->next_jiffies))) {
+ /* Ouch... timer was delayed. */
+ est->next_jiffies = jiffies + 1;
}
- return NULL;
+ mod_timer(&est->timer, est->next_jiffies);
}
/**
*/
int gen_new_estimator(struct gnet_stats_basic_packed *bstats,
struct gnet_stats_basic_cpu __percpu *cpu_bstats,
- struct gnet_stats_rate_est64 *rate_est,
+ struct net_rate_estimator __rcu **rate_est,
spinlock_t *stats_lock,
seqcount_t *running,
struct nlattr *opt)
{
- struct gen_estimator *est;
struct gnet_estimator *parm = nla_data(opt);
- struct gnet_stats_basic_packed b = {0};
- int idx;
+ struct net_rate_estimator *old, *est;
+ struct gnet_stats_basic_packed b;
+ int intvl_log;
if (nla_len(opt) < sizeof(*parm))
return -EINVAL;
+ /* allowed timer periods are :
+ * -2 : 250ms, -1 : 500ms, 0 : 1 sec
+ * 1 : 2 sec, 2 : 4 sec, 3 : 8 sec
+ */
if (parm->interval < -2 || parm->interval > 3)
return -EINVAL;
est = kzalloc(sizeof(*est), GFP_KERNEL);
- if (est == NULL)
+ if (!est)
return -ENOBUFS;
- __gnet_stats_copy_basic(running, &b, cpu_bstats, bstats);
-
- idx = parm->interval + 2;
+ seqcount_init(&est->seq);
+ intvl_log = parm->interval + 2;
est->bstats = bstats;
- est->rate_est = rate_est;
est->stats_lock = stats_lock;
est->running = running;
est->ewma_log = parm->ewma_log;
- est->last_bytes = b.bytes;
- est->avbps = rate_est->bps<<5;
- est->last_packets = b.packets;
- est->avpps = rate_est->pps<<10;
+ est->intvl_log = intvl_log;
est->cpu_bstats = cpu_bstats;
- spin_lock_bh(&est_tree_lock);
- if (!elist[idx].timer.function) {
- INIT_LIST_HEAD(&elist[idx].list);
- setup_timer(&elist[idx].timer, est_timer, idx);
+ est_fetch_counters(est, &b);
+ est->last_bytes = b.bytes;
+ est->last_packets = b.packets;
+ old = rcu_dereference_protected(*rate_est, 1);
+ if (old) {
+ del_timer_sync(&old->timer);
+ est->avbps = old->avbps;
+ est->avpps = old->avpps;
}
- if (list_empty(&elist[idx].list)) {
- elist[idx].next_jiffies = jiffies + ((HZ/4) << idx);
- mod_timer(&elist[idx].timer, elist[idx].next_jiffies);
- }
- list_add_rcu(&est->list, &elist[idx].list);
- gen_add_node(est);
- spin_unlock_bh(&est_tree_lock);
+ est->next_jiffies = jiffies + ((HZ/4) << intvl_log);
+ setup_timer(&est->timer, est_timer, (unsigned long)est);
+ mod_timer(&est->timer, est->next_jiffies);
+ rcu_assign_pointer(*rate_est, est);
+ if (old)
+ kfree_rcu(old, rcu);
return 0;
}
EXPORT_SYMBOL(gen_new_estimator);
/**
* gen_kill_estimator - remove a rate estimator
- * @bstats: basic statistics
- * @rate_est: rate estimator statistics
+ * @rate_est: rate estimator
*
- * Removes the rate estimator specified by &bstats and &rate_est.
+ * Removes the rate estimator.
*
- * Note : Caller should respect an RCU grace period before freeing stats_lock
*/
-void gen_kill_estimator(struct gnet_stats_basic_packed *bstats,
- struct gnet_stats_rate_est64 *rate_est)
+void gen_kill_estimator(struct net_rate_estimator __rcu **rate_est)
{
- struct gen_estimator *e;
-
- spin_lock_bh(&est_tree_lock);
- while ((e = gen_find_node(bstats, rate_est))) {
- rb_erase(&e->node, &est_root);
+ struct net_rate_estimator *est;
- write_lock(&est_lock);
- e->bstats = NULL;
- write_unlock(&est_lock);
-
- list_del_rcu(&e->list);
- kfree_rcu(e, e_rcu);
+ est = xchg((__force struct net_rate_estimator **)rate_est, NULL);
+ if (est) {
+ del_timer_sync(&est->timer);
+ kfree_rcu(est, rcu);
}
- spin_unlock_bh(&est_tree_lock);
}
EXPORT_SYMBOL(gen_kill_estimator);
*/
int gen_replace_estimator(struct gnet_stats_basic_packed *bstats,
struct gnet_stats_basic_cpu __percpu *cpu_bstats,
- struct gnet_stats_rate_est64 *rate_est,
+ struct net_rate_estimator __rcu **rate_est,
spinlock_t *stats_lock,
seqcount_t *running, struct nlattr *opt)
{
- gen_kill_estimator(bstats, rate_est);
- return gen_new_estimator(bstats, cpu_bstats, rate_est, stats_lock, running, opt);
+ return gen_new_estimator(bstats, cpu_bstats, rate_est,
+ stats_lock, running, opt);
}
EXPORT_SYMBOL(gen_replace_estimator);
/**
* gen_estimator_active - test if estimator is currently in use
- * @bstats: basic statistics
- * @rate_est: rate estimator statistics
+ * @rate_est: rate estimator
*
* Returns true if estimator is active, and false if not.
*/
-bool gen_estimator_active(const struct gnet_stats_basic_packed *bstats,
- const struct gnet_stats_rate_est64 *rate_est)
+bool gen_estimator_active(struct net_rate_estimator __rcu **rate_est)
{
- bool res;
+ return !!rcu_access_pointer(*rate_est);
+}
+EXPORT_SYMBOL(gen_estimator_active);
- ASSERT_RTNL();
+bool gen_estimator_read(struct net_rate_estimator __rcu **rate_est,
+ struct gnet_stats_rate_est64 *sample)
+{
+ struct net_rate_estimator *est;
+ unsigned seq;
+
+ rcu_read_lock();
+ est = rcu_dereference(*rate_est);
+ if (!est) {
+ rcu_read_unlock();
+ return false;
+ }
- spin_lock_bh(&est_tree_lock);
- res = gen_find_node(bstats, rate_est) != NULL;
- spin_unlock_bh(&est_tree_lock);
+ do {
+ seq = read_seqcount_begin(&est->seq);
+ sample->bps = est->avbps >> 8;
+ sample->pps = est->avpps >> 8;
+ } while (read_seqcount_retry(&est->seq, seq));
- return res;
+ rcu_read_unlock();
+ return true;
}
-EXPORT_SYMBOL(gen_estimator_active);
+EXPORT_SYMBOL(gen_estimator_read);
/**
* gnet_stats_copy_rate_est - copy rate estimator statistics into statistics TLV
* @d: dumping handle
- * @b: basic statistics
- * @r: rate estimator statistics
+ * @rate_est: rate estimator
*
* Appends the rate estimator statistics to the top level TLV created by
* gnet_stats_start_copy().
*/
int
gnet_stats_copy_rate_est(struct gnet_dump *d,
- const struct gnet_stats_basic_packed *b,
- struct gnet_stats_rate_est64 *r)
+ struct net_rate_estimator __rcu **rate_est)
{
+ struct gnet_stats_rate_est64 sample;
struct gnet_stats_rate_est est;
int res;
- if (b && !gen_estimator_active(b, r))
+ if (!gen_estimator_read(rate_est, &sample))
return 0;
-
- est.bps = min_t(u64, UINT_MAX, r->bps);
+ est.bps = min_t(u64, UINT_MAX, sample.bps);
/* we have some time before reaching 2^32 packets per second */
- est.pps = r->pps;
+ est.pps = sample.pps;
if (d->compat_tc_stats) {
d->tc_stats.bps = est.bps;
if (d->tail) {
res = gnet_stats_copy(d, TCA_STATS_RATE_EST, &est, sizeof(est),
TCA_STATS_PAD);
- if (res < 0 || est.bps == r->bps)
+ if (res < 0 || est.bps == sample.bps)
return res;
/* emit 64bit stats only if needed */
- return gnet_stats_copy(d, TCA_STATS_RATE_EST64, r, sizeof(*r),
- TCA_STATS_PAD);
+ return gnet_stats_copy(d, TCA_STATS_RATE_EST64, &sample,
+ sizeof(sample), TCA_STATS_PAD);
}
return 0;
mutex_lock(&xt_rateest_mutex);
if (--est->refcnt == 0) {
hlist_del(&est->list);
- gen_kill_estimator(&est->bstats, &est->rstats);
+ gen_kill_estimator(&est->rate_est);
/*
* gen_estimator est_timer() might access est->lock or bstats,
* wait a RCU grace period before freeing 'est'
cfg.est.interval = info->interval;
cfg.est.ewma_log = info->ewma_log;
- ret = gen_new_estimator(&est->bstats, NULL, &est->rstats,
+ ret = gen_new_estimator(&est->bstats, NULL, &est->rate_est,
&est->lock, NULL, &cfg.opt);
if (ret < 0)
goto err2;
xt_rateest_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_rateest_match_info *info = par->matchinfo;
- struct gnet_stats_rate_est64 *r;
+ struct gnet_stats_rate_est64 sample = {0};
u_int32_t bps1, bps2, pps1, pps2;
bool ret = true;
- spin_lock_bh(&info->est1->lock);
- r = &info->est1->rstats;
+ gen_estimator_read(&info->est1->rate_est, &sample);
+
if (info->flags & XT_RATEEST_MATCH_DELTA) {
- bps1 = info->bps1 >= r->bps ? info->bps1 - r->bps : 0;
- pps1 = info->pps1 >= r->pps ? info->pps1 - r->pps : 0;
+ bps1 = info->bps1 >= sample.bps ? info->bps1 - sample.bps : 0;
+ pps1 = info->pps1 >= sample.pps ? info->pps1 - sample.pps : 0;
} else {
- bps1 = r->bps;
- pps1 = r->pps;
+ bps1 = sample.bps;
+ pps1 = sample.pps;
}
- spin_unlock_bh(&info->est1->lock);
if (info->flags & XT_RATEEST_MATCH_ABS) {
bps2 = info->bps2;
pps2 = info->pps2;
} else {
- spin_lock_bh(&info->est2->lock);
- r = &info->est2->rstats;
+ gen_estimator_read(&info->est2->rate_est, &sample);
+
if (info->flags & XT_RATEEST_MATCH_DELTA) {
- bps2 = info->bps2 >= r->bps ? info->bps2 - r->bps : 0;
- pps2 = info->pps2 >= r->pps ? info->pps2 - r->pps : 0;
+ bps2 = info->bps2 >= sample.bps ? info->bps2 - sample.bps : 0;
+ pps2 = info->pps2 >= sample.pps ? info->pps2 - sample.pps : 0;
} else {
- bps2 = r->bps;
- pps2 = r->pps;
+ bps2 = sample.bps;
+ pps2 = sample.pps;
}
- spin_unlock_bh(&info->est2->lock);
}
switch (info->mode) {
spin_lock_bh(&hinfo->lock);
hlist_del(&p->tcfa_head);
spin_unlock_bh(&hinfo->lock);
- gen_kill_estimator(&p->tcfa_bstats,
- &p->tcfa_rate_est);
+ gen_kill_estimator(&p->tcfa_rate_est);
/*
* gen_estimator est_timer() might access p->tcfa_lock
* or bstats, wait a RCU grace period before freeing p
void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est)
{
if (est)
- gen_kill_estimator(&a->tcfa_bstats,
- &a->tcfa_rate_est);
+ gen_kill_estimator(&a->tcfa_rate_est);
call_rcu(&a->tcfa_rcu, free_tcf);
}
EXPORT_SYMBOL(tcf_hash_cleanup);
goto errout;
if (gnet_stats_copy_basic(NULL, &d, p->cpu_bstats, &p->tcfa_bstats) < 0 ||
- gnet_stats_copy_rate_est(&d, &p->tcfa_bstats,
- &p->tcfa_rate_est) < 0 ||
+ gnet_stats_copy_rate_est(&d, &p->tcfa_rate_est) < 0 ||
gnet_stats_copy_queue(&d, p->cpu_qstats,
&p->tcfa_qstats,
p->tcfa_qstats.qlen) < 0)
goto failure_unlock;
} else if (tb[TCA_POLICE_AVRATE] &&
(ret == ACT_P_CREATED ||
- !gen_estimator_active(&police->tcf_bstats,
- &police->tcf_rate_est))) {
+ !gen_estimator_active(&police->tcf_rate_est))) {
err = -EINVAL;
goto failure_unlock;
}
bstats_update(&police->tcf_bstats, skb);
tcf_lastuse_update(&police->tcf_tm);
- if (police->tcfp_ewma_rate &&
- police->tcf_rate_est.bps >= police->tcfp_ewma_rate) {
- police->tcf_qstats.overlimits++;
- if (police->tcf_action == TC_ACT_SHOT)
- police->tcf_qstats.drops++;
- spin_unlock(&police->tcf_lock);
- return police->tcf_action;
+ if (police->tcfp_ewma_rate) {
+ struct gnet_stats_rate_est64 sample;
+
+ if (!gen_estimator_read(&police->tcf_rate_est, &sample) ||
+ sample.bps >= police->tcfp_ewma_rate) {
+ police->tcf_qstats.overlimits++;
+ if (police->tcf_action == TC_ACT_SHOT)
+ police->tcf_qstats.drops++;
+ spin_unlock(&police->tcf_lock);
+ return police->tcf_action;
+ }
}
if (qdisc_pkt_len(skb) <= police->tcfp_mtu) {
if (gnet_stats_copy_basic(qdisc_root_sleeping_running(q),
&d, cpu_bstats, &q->bstats) < 0 ||
- gnet_stats_copy_rate_est(&d, &q->bstats, &q->rate_est) < 0 ||
+ gnet_stats_copy_rate_est(&d, &q->rate_est) < 0 ||
gnet_stats_copy_queue(&d, cpu_qstats, &q->qstats, qlen) < 0)
goto nla_put_failure;
psched_time_t penalized;
struct gnet_stats_basic_packed bstats;
struct gnet_stats_queue qstats;
- struct gnet_stats_rate_est64 rate_est;
+ struct net_rate_estimator __rcu *rate_est;
struct tc_cbq_xstats xstats;
struct tcf_proto __rcu *filter_list;
if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch),
d, NULL, &cl->bstats) < 0 ||
- gnet_stats_copy_rate_est(d, &cl->bstats, &cl->rate_est) < 0 ||
+ gnet_stats_copy_rate_est(d, &cl->rate_est) < 0 ||
gnet_stats_copy_queue(d, NULL, &cl->qstats, cl->q->q.qlen) < 0)
return -1;
tcf_destroy_chain(&cl->filter_list);
qdisc_destroy(cl->q);
qdisc_put_rtab(cl->R_tab);
- gen_kill_estimator(&cl->bstats, &cl->rate_est);
+ gen_kill_estimator(&cl->rate_est);
if (cl != &q->link)
kfree(cl);
}
struct gnet_stats_basic_packed bstats;
struct gnet_stats_queue qstats;
- struct gnet_stats_rate_est64 rate_est;
+ struct net_rate_estimator __rcu *rate_est;
struct list_head alist;
struct Qdisc *qdisc;
static void drr_destroy_class(struct Qdisc *sch, struct drr_class *cl)
{
- gen_kill_estimator(&cl->bstats, &cl->rate_est);
+ gen_kill_estimator(&cl->rate_est);
qdisc_destroy(cl->qdisc);
kfree(cl);
}
if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch),
d, NULL, &cl->bstats) < 0 ||
- gnet_stats_copy_rate_est(d, &cl->bstats, &cl->rate_est) < 0 ||
+ gnet_stats_copy_rate_est(d, &cl->rate_est) < 0 ||
gnet_stats_copy_queue(d, NULL, &cl->qdisc->qstats, qlen) < 0)
return -1;
qdisc_put_stab(rtnl_dereference(qdisc->stab));
#endif
- gen_kill_estimator(&qdisc->bstats, &qdisc->rate_est);
+ gen_kill_estimator(&qdisc->rate_est);
if (ops->reset)
ops->reset(qdisc);
if (ops->destroy)
struct gnet_stats_basic_packed bstats;
struct gnet_stats_queue qstats;
- struct gnet_stats_rate_est64 rate_est;
+ struct net_rate_estimator __rcu *rate_est;
struct tcf_proto __rcu *filter_list; /* filter list */
unsigned int filter_cnt; /* filter count */
unsigned int level; /* class level in hierarchy */
tcf_destroy_chain(&cl->filter_list);
qdisc_destroy(cl->qdisc);
- gen_kill_estimator(&cl->bstats, &cl->rate_est);
+ gen_kill_estimator(&cl->rate_est);
if (cl != &q->root)
kfree(cl);
}
xstats.rtwork = cl->cl_cumul;
if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch), d, NULL, &cl->bstats) < 0 ||
- gnet_stats_copy_rate_est(d, &cl->bstats, &cl->rate_est) < 0 ||
+ gnet_stats_copy_rate_est(d, &cl->rate_est) < 0 ||
gnet_stats_copy_queue(d, NULL, &cl->qstats, cl->qdisc->q.qlen) < 0)
return -1;
unsigned int children;
struct htb_class *parent; /* parent class */
- struct gnet_stats_rate_est64 rate_est;
+ struct net_rate_estimator __rcu *rate_est;
/*
* Written often fields
if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch),
d, NULL, &cl->bstats) < 0 ||
- gnet_stats_copy_rate_est(d, &cl->bstats, &cl->rate_est) < 0 ||
+ gnet_stats_copy_rate_est(d, &cl->rate_est) < 0 ||
gnet_stats_copy_queue(d, NULL, &qs, qlen) < 0)
return -1;
WARN_ON(!cl->un.leaf.q);
qdisc_destroy(cl->un.leaf.q);
}
- gen_kill_estimator(&cl->bstats, &cl->rate_est);
+ gen_kill_estimator(&cl->rate_est);
tcf_destroy_chain(&cl->filter_list);
kfree(cl);
}
struct gnet_stats_basic_packed bstats;
struct gnet_stats_queue qstats;
- struct gnet_stats_rate_est64 rate_est;
+ struct net_rate_estimator __rcu *rate_est;
struct Qdisc *qdisc;
struct list_head alist; /* Link for active-classes list. */
struct qfq_aggregate *agg; /* Parent aggregate. */
new_agg = kzalloc(sizeof(*new_agg), GFP_KERNEL);
if (new_agg == NULL) {
err = -ENOBUFS;
- gen_kill_estimator(&cl->bstats, &cl->rate_est);
+ gen_kill_estimator(&cl->rate_est);
goto destroy_class;
}
sch_tree_lock(sch);
struct qfq_sched *q = qdisc_priv(sch);
qfq_rm_from_agg(q, cl);
- gen_kill_estimator(&cl->bstats, &cl->rate_est);
+ gen_kill_estimator(&cl->rate_est);
qdisc_destroy(cl->qdisc);
kfree(cl);
}
if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch),
d, NULL, &cl->bstats) < 0 ||
- gnet_stats_copy_rate_est(d, &cl->bstats, &cl->rate_est) < 0 ||
+ gnet_stats_copy_rate_est(d, &cl->rate_est) < 0 ||
gnet_stats_copy_queue(d, NULL,
&cl->qdisc->qstats, cl->qdisc->q.qlen) < 0)
return -1;
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff