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net: sched: add percpu stats to actions 

Reuse existing percpu infrastructure John Fastabend added for qdisc.

This patch adds a new cpustats parameter to tcf_hash_create() and all
actions pass false, meaning this patch should have no effect yet.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2015-07-06 05:18:04 -07:00 committed by David S. Miller
parent 24ea591d22
commit 519c818e8f
13 changed files with 57 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/net/act_api.h
View File

@ -21,6 +21,8 @@ struct tcf_common {
struct gnet_stats_rate_est64 tcfc_rate_est;
spinlock_t tcfc_lock;
struct rcu_head tcfc_rcu;
struct gnet_stats_basic_cpu __percpu *cpu_bstats;
struct gnet_stats_queue __percpu *cpu_qstats;
};
#define tcf_head common.tcfc_head
#define tcf_index common.tcfc_index
@ -103,7 +105,7 @@ int tcf_hash_release(struct tc_action *a, int bind);
u32 tcf_hash_new_index(struct tcf_hashinfo *hinfo);
int tcf_hash_check(u32 index, struct tc_action *a, int bind);
int tcf_hash_create(u32 index, struct nlattr *est, struct tc_action *a,
int size, int bind);
int size, int bind, bool cpustats);
void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
void tcf_hash_insert(struct tc_action *a);

44
net/sched/act_api.c
View File

@ -27,6 +27,15 @@
#include <net/act_api.h>
#include <net/netlink.h>
static void free_tcf(struct rcu_head *head)
{
struct tcf_common *p = container_of(head, struct tcf_common, tcfc_rcu);
free_percpu(p->cpu_bstats);
free_percpu(p->cpu_qstats);
kfree(p);
}
void tcf_hash_destroy(struct tc_action *a)
{
struct tcf_common *p = a->priv;
@ -41,7 +50,7 @@ void tcf_hash_destroy(struct tc_action *a)
* gen_estimator est_timer() might access p->tcfc_lock
* or bstats, wait a RCU grace period before freeing p
*/
kfree_rcu(p, tcfc_rcu);
call_rcu(&p->tcfc_rcu, free_tcf);
}
EXPORT_SYMBOL(tcf_hash_destroy);
@ -230,15 +239,16 @@ void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est)
if (est)
gen_kill_estimator(&pc->tcfc_bstats,
&pc->tcfc_rate_est);
kfree_rcu(pc, tcfc_rcu);
call_rcu(&pc->tcfc_rcu, free_tcf);
}
EXPORT_SYMBOL(tcf_hash_cleanup);
int tcf_hash_create(u32 index, struct nlattr *est, struct tc_action *a,
int size, int bind)
int size, int bind, bool cpustats)
{
struct tcf_hashinfo *hinfo = a->ops->hinfo;
struct tcf_common *p = kzalloc(size, GFP_KERNEL);
int err = -ENOMEM;
if (unlikely(!p))
return -ENOMEM;
@ -246,18 +256,32 @@ int tcf_hash_create(u32 index, struct nlattr *est, struct tc_action *a,
if (bind)
p->tcfc_bindcnt = 1;
if (cpustats) {
p->cpu_bstats = netdev_alloc_pcpu_stats(struct gnet_stats_basic_cpu);
if (!p->cpu_bstats) {
err1:
kfree(p);
return err;
}
p->cpu_qstats = alloc_percpu(struct gnet_stats_queue);
if (!p->cpu_qstats) {
err2:
free_percpu(p->cpu_bstats);
goto err1;
}
}
spin_lock_init(&p->tcfc_lock);
INIT_HLIST_NODE(&p->tcfc_head);
p->tcfc_index = index ? index : tcf_hash_new_index(hinfo);
p->tcfc_tm.install = jiffies;
p->tcfc_tm.lastuse = jiffies;
if (est) {
int err = gen_new_estimator(&p->tcfc_bstats, NULL,
&p->tcfc_rate_est,
&p->tcfc_lock, est);
err = gen_new_estimator(&p->tcfc_bstats, p->cpu_bstats,
&p->tcfc_rate_est,
&p->tcfc_lock, est);
if (err) {
kfree(p);
return err;
free_percpu(p->cpu_qstats);
goto err2;
}
}
@ -615,10 +639,10 @@ int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a,
if (err < 0)
goto errout;
if (gnet_stats_copy_basic(&d, NULL, &p->tcfc_bstats) < 0 ||
if (gnet_stats_copy_basic(&d, p->cpu_bstats, &p->tcfc_bstats) < 0 ||
gnet_stats_copy_rate_est(&d, &p->tcfc_bstats,
&p->tcfc_rate_est) < 0 ||
gnet_stats_copy_queue(&d, NULL,
gnet_stats_copy_queue(&d, p->cpu_qstats,
&p->tcfc_qstats,
p->tcfc_qstats.qlen) < 0)
goto errout;

2
net/sched/act_bpf.c
View File

@ -281,7 +281,7 @@ static int tcf_bpf_init(struct net *net, struct nlattr *nla,
if (!tcf_hash_check(parm->index, act, bind)) {
ret = tcf_hash_create(parm->index, est, act,
sizeof(*prog), bind);
sizeof(*prog), bind, false);
if (ret < 0)
goto destroy_fp;

3
net/sched/act_connmark.c
View File

@ -108,7 +108,8 @@ static int tcf_connmark_init(struct net *net, struct nlattr *nla,
parm = nla_data(tb[TCA_CONNMARK_PARMS]);
if (!tcf_hash_check(parm->index, a, bind)) {
ret = tcf_hash_create(parm->index, est, a, sizeof(*ci), bind);
ret = tcf_hash_create(parm->index, est, a, sizeof(*ci),
bind, false);
if (ret)
return ret;

3
net/sched/act_csum.c
View File

@ -62,7 +62,8 @@ static int tcf_csum_init(struct net *n, struct nlattr *nla, struct nlattr *est,
parm = nla_data(tb[TCA_CSUM_PARMS]);
if (!tcf_hash_check(parm->index, a, bind)) {
ret = tcf_hash_create(parm->index, est, a, sizeof(*p), bind);
ret = tcf_hash_create(parm->index, est, a, sizeof(*p),
bind, false);
if (ret)
return ret;
ret = ACT_P_CREATED;

3
net/sched/act_gact.c
View File

@ -85,7 +85,8 @@ static int tcf_gact_init(struct net *net, struct nlattr *nla,
#endif
if (!tcf_hash_check(parm->index, a, bind)) {
ret = tcf_hash_create(parm->index, est, a, sizeof(*gact), bind);
ret = tcf_hash_create(parm->index, est, a, sizeof(*gact),
bind, false);
if (ret)
return ret;
ret = ACT_P_CREATED;

2
net/sched/act_ipt.c
View File

@ -114,7 +114,7 @@ static int tcf_ipt_init(struct net *net, struct nlattr *nla, struct nlattr *est,
index = nla_get_u32(tb[TCA_IPT_INDEX]);
if (!tcf_hash_check(index, a, bind) ) {
ret = tcf_hash_create(index, est, a, sizeof(*ipt), bind);
ret = tcf_hash_create(index, est, a, sizeof(*ipt), bind, false);
if (ret)
return ret;
ret = ACT_P_CREATED;

3
net/sched/act_mirred.c
View File

@ -93,7 +93,8 @@ static int tcf_mirred_init(struct net *net, struct nlattr *nla,
if (!tcf_hash_check(parm->index, a, bind)) {
if (dev == NULL)
return -EINVAL;
ret = tcf_hash_create(parm->index, est, a, sizeof(*m), bind);
ret = tcf_hash_create(parm->index, est, a, sizeof(*m),
bind, false);
if (ret)
return ret;
ret = ACT_P_CREATED;

3
net/sched/act_nat.c
View File

@ -55,7 +55,8 @@ static int tcf_nat_init(struct net *net, struct nlattr *nla, struct nlattr *est,
parm = nla_data(tb[TCA_NAT_PARMS]);
if (!tcf_hash_check(parm->index, a, bind)) {
ret = tcf_hash_create(parm->index, est, a, sizeof(*p), bind);
ret = tcf_hash_create(parm->index, est, a, sizeof(*p),
bind, false);
if (ret)
return ret;
ret = ACT_P_CREATED;

3
net/sched/act_pedit.c
View File

@ -57,7 +57,8 @@ static int tcf_pedit_init(struct net *net, struct nlattr *nla,
if (!tcf_hash_check(parm->index, a, bind)) {
if (!parm->nkeys)
return -EINVAL;
ret = tcf_hash_create(parm->index, est, a, sizeof(*p), bind);
ret = tcf_hash_create(parm->index, est, a, sizeof(*p),
bind, false);
if (ret)
return ret;
p = to_pedit(a);

3
net/sched/act_simple.c
View File

@ -103,7 +103,8 @@ static int tcf_simp_init(struct net *net, struct nlattr *nla,
defdata = nla_data(tb[TCA_DEF_DATA]);
if (!tcf_hash_check(parm->index, a, bind)) {
ret = tcf_hash_create(parm->index, est, a, sizeof(*d), bind);
ret = tcf_hash_create(parm->index, est, a, sizeof(*d),
bind, false);
if (ret)
return ret;

3
net/sched/act_skbedit.c
View File

@ -99,7 +99,8 @@ static int tcf_skbedit_init(struct net *net, struct nlattr *nla,
parm = nla_data(tb[TCA_SKBEDIT_PARMS]);
if (!tcf_hash_check(parm->index, a, bind)) {
ret = tcf_hash_create(parm->index, est, a, sizeof(*d), bind);
ret = tcf_hash_create(parm->index, est, a, sizeof(*d),
bind, false);
if (ret)
return ret;

3
net/sched/act_vlan.c
View File

@ -116,7 +116,8 @@ static int tcf_vlan_init(struct net *net, struct nlattr *nla,
action = parm->v_action;
if (!tcf_hash_check(parm->index, a, bind)) {
ret = tcf_hash_create(parm->index, est, a, sizeof(*v), bind);
ret = tcf_hash_create(parm->index, est, a, sizeof(*v),
bind, false);
if (ret)
return ret;