2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* net/sched/police.c Input police filter.
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or
|
|
|
|
* modify it under the terms of the GNU General Public License
|
|
|
|
* as published by the Free Software Foundation; either version
|
|
|
|
* 2 of the License, or (at your option) any later version.
|
|
|
|
*
|
|
|
|
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
|
|
|
|
* J Hadi Salim (action changes)
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/types.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/string.h>
|
|
|
|
#include <linux/errno.h>
|
|
|
|
#include <linux/skbuff.h>
|
|
|
|
#include <linux/rtnetlink.h>
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <net/act_api.h>
|
2007-03-26 06:06:12 +00:00
|
|
|
#include <net/netlink.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-09-12 14:35:24 +00:00
|
|
|
#define L2T(p,L) qdisc_l2t((p)->tcfp_R_tab, L)
|
|
|
|
#define L2T_P(p,L) qdisc_l2t((p)->tcfp_P_tab, L)
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-08-22 06:54:55 +00:00
|
|
|
#define POL_TAB_MASK 15
|
|
|
|
static struct tcf_common *tcf_police_ht[POL_TAB_MASK + 1];
|
|
|
|
static u32 police_idx_gen;
|
|
|
|
static DEFINE_RWLOCK(police_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-08-22 06:54:55 +00:00
|
|
|
static struct tcf_hashinfo police_hash_info = {
|
|
|
|
.htab = tcf_police_ht,
|
|
|
|
.hmask = POL_TAB_MASK,
|
|
|
|
.lock = &police_lock,
|
|
|
|
};
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-12-01 03:54:05 +00:00
|
|
|
/* old policer structure from before tc actions */
|
|
|
|
struct tc_police_compat
|
|
|
|
{
|
|
|
|
u32 index;
|
|
|
|
int action;
|
|
|
|
u32 limit;
|
|
|
|
u32 burst;
|
|
|
|
u32 mtu;
|
|
|
|
struct tc_ratespec rate;
|
|
|
|
struct tc_ratespec peakrate;
|
|
|
|
};
|
|
|
|
|
2006-08-22 06:54:55 +00:00
|
|
|
/* Each policer is serialized by its individual spinlock */
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-04-07 05:24:22 +00:00
|
|
|
static int tcf_act_police_walker(struct sk_buff *skb, struct netlink_callback *cb,
|
2007-02-09 14:25:16 +00:00
|
|
|
int type, struct tc_action *a)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2006-08-22 06:54:55 +00:00
|
|
|
struct tcf_common *p;
|
2005-04-16 22:20:36 +00:00
|
|
|
int err = 0, index = -1, i = 0, s_i = 0, n_i = 0;
|
2008-01-24 04:34:11 +00:00
|
|
|
struct nlattr *nest;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
[NET_SCHED] protect action config/dump from irqs
(with no apologies to C Heston)
On Mon, 2007-10-09 at 21:00 +0800, Herbert Xu wrote:
On Sun, Sep 02, 2007 at 01:11:29PM +0000, Christian Kujau wrote:
> >
> > after upgrading to 2.6.23-rc5 (and applying davem's fix [0]), lockdep
> > was quite noisy when I tried to shape my external (wireless) interface:
> >
> > [ 6400.534545] FahCore_78.exe/3552 just changed the state of lock:
> > [ 6400.534713] (&dev->ingress_lock){-+..}, at: [<c038d595>]
> > netif_receive_skb+0x2d5/0x3c0
> > [ 6400.534941] but this lock took another, soft-read-irq-unsafe lock in the
> > past:
> > [ 6400.535145] (police_lock){-.--}
>
> This is a genuine dead-lock. The police lock can be taken
> for reading with softirqs on. If a second CPU tries to take
> the police lock for writing, while holding the ingress lock,
> then a softirq on the first CPU can dead-lock when it tries
> to get the ingress lock.
Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-09-12 14:32:59 +00:00
|
|
|
read_lock_bh(&police_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
s_i = cb->args[0];
|
|
|
|
|
2006-08-22 06:54:55 +00:00
|
|
|
for (i = 0; i < (POL_TAB_MASK + 1); i++) {
|
|
|
|
p = tcf_police_ht[tcf_hash(i, POL_TAB_MASK)];
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-08-22 06:54:55 +00:00
|
|
|
for (; p; p = p->tcfc_next) {
|
2005-04-16 22:20:36 +00:00
|
|
|
index++;
|
|
|
|
if (index < s_i)
|
|
|
|
continue;
|
|
|
|
a->priv = p;
|
|
|
|
a->order = index;
|
2008-01-24 04:34:11 +00:00
|
|
|
nest = nla_nest_start(skb, a->order);
|
|
|
|
if (nest == NULL)
|
|
|
|
goto nla_put_failure;
|
2005-04-16 22:20:36 +00:00
|
|
|
if (type == RTM_DELACTION)
|
|
|
|
err = tcf_action_dump_1(skb, a, 0, 1);
|
|
|
|
else
|
|
|
|
err = tcf_action_dump_1(skb, a, 0, 0);
|
|
|
|
if (err < 0) {
|
|
|
|
index--;
|
2008-01-24 04:34:11 +00:00
|
|
|
nla_nest_cancel(skb, nest);
|
2005-04-16 22:20:36 +00:00
|
|
|
goto done;
|
|
|
|
}
|
2008-01-24 04:34:11 +00:00
|
|
|
nla_nest_end(skb, nest);
|
2005-04-16 22:20:36 +00:00
|
|
|
n_i++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
done:
|
[NET_SCHED] protect action config/dump from irqs
(with no apologies to C Heston)
On Mon, 2007-10-09 at 21:00 +0800, Herbert Xu wrote:
On Sun, Sep 02, 2007 at 01:11:29PM +0000, Christian Kujau wrote:
> >
> > after upgrading to 2.6.23-rc5 (and applying davem's fix [0]), lockdep
> > was quite noisy when I tried to shape my external (wireless) interface:
> >
> > [ 6400.534545] FahCore_78.exe/3552 just changed the state of lock:
> > [ 6400.534713] (&dev->ingress_lock){-+..}, at: [<c038d595>]
> > netif_receive_skb+0x2d5/0x3c0
> > [ 6400.534941] but this lock took another, soft-read-irq-unsafe lock in the
> > past:
> > [ 6400.535145] (police_lock){-.--}
>
> This is a genuine dead-lock. The police lock can be taken
> for reading with softirqs on. If a second CPU tries to take
> the police lock for writing, while holding the ingress lock,
> then a softirq on the first CPU can dead-lock when it tries
> to get the ingress lock.
Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-09-12 14:32:59 +00:00
|
|
|
read_unlock_bh(&police_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (n_i)
|
|
|
|
cb->args[0] += n_i;
|
|
|
|
return n_i;
|
|
|
|
|
2008-01-23 06:11:50 +00:00
|
|
|
nla_put_failure:
|
2008-01-24 04:34:11 +00:00
|
|
|
nla_nest_cancel(skb, nest);
|
2005-04-16 22:20:36 +00:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
2007-07-15 07:03:05 +00:00
|
|
|
static void tcf_police_destroy(struct tcf_police *p)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2006-08-22 06:54:55 +00:00
|
|
|
unsigned int h = tcf_hash(p->tcf_index, POL_TAB_MASK);
|
|
|
|
struct tcf_common **p1p;
|
2007-02-09 14:25:16 +00:00
|
|
|
|
2006-08-22 06:54:55 +00:00
|
|
|
for (p1p = &tcf_police_ht[h]; *p1p; p1p = &(*p1p)->tcfc_next) {
|
|
|
|
if (*p1p == &p->common) {
|
2005-04-16 22:20:36 +00:00
|
|
|
write_lock_bh(&police_lock);
|
2006-08-22 06:54:55 +00:00
|
|
|
*p1p = p->tcf_next;
|
2005-04-16 22:20:36 +00:00
|
|
|
write_unlock_bh(&police_lock);
|
2006-08-22 06:54:55 +00:00
|
|
|
gen_kill_estimator(&p->tcf_bstats,
|
|
|
|
&p->tcf_rate_est);
|
|
|
|
if (p->tcfp_R_tab)
|
|
|
|
qdisc_put_rtab(p->tcfp_R_tab);
|
|
|
|
if (p->tcfp_P_tab)
|
|
|
|
qdisc_put_rtab(p->tcfp_P_tab);
|
2005-04-16 22:20:36 +00:00
|
|
|
kfree(p);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
2008-07-26 04:43:18 +00:00
|
|
|
WARN_ON(1);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2008-01-24 04:36:30 +00:00
|
|
|
static const struct nla_policy police_policy[TCA_POLICE_MAX + 1] = {
|
|
|
|
[TCA_POLICE_RATE] = { .len = TC_RTAB_SIZE },
|
|
|
|
[TCA_POLICE_PEAKRATE] = { .len = TC_RTAB_SIZE },
|
|
|
|
[TCA_POLICE_AVRATE] = { .type = NLA_U32 },
|
|
|
|
[TCA_POLICE_RESULT] = { .type = NLA_U32 },
|
|
|
|
};
|
|
|
|
|
2008-01-23 06:11:50 +00:00
|
|
|
static int tcf_act_police_locate(struct nlattr *nla, struct nlattr *est,
|
2007-02-09 14:25:16 +00:00
|
|
|
struct tc_action *a, int ovr, int bind)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
unsigned h;
|
|
|
|
int ret = 0, err;
|
2008-01-23 06:11:50 +00:00
|
|
|
struct nlattr *tb[TCA_POLICE_MAX + 1];
|
2005-04-16 22:20:36 +00:00
|
|
|
struct tc_police *parm;
|
2006-08-22 06:54:55 +00:00
|
|
|
struct tcf_police *police;
|
2005-04-16 22:20:36 +00:00
|
|
|
struct qdisc_rate_table *R_tab = NULL, *P_tab = NULL;
|
2006-12-01 03:54:05 +00:00
|
|
|
int size;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-01-24 04:33:32 +00:00
|
|
|
if (nla == NULL)
|
2005-04-16 22:20:36 +00:00
|
|
|
return -EINVAL;
|
|
|
|
|
2008-01-24 04:36:30 +00:00
|
|
|
err = nla_parse_nested(tb, TCA_POLICE_MAX, nla, police_policy);
|
2008-01-24 04:33:32 +00:00
|
|
|
if (err < 0)
|
|
|
|
return err;
|
|
|
|
|
2008-01-23 06:11:50 +00:00
|
|
|
if (tb[TCA_POLICE_TBF] == NULL)
|
2006-12-01 03:54:05 +00:00
|
|
|
return -EINVAL;
|
2008-01-23 06:11:50 +00:00
|
|
|
size = nla_len(tb[TCA_POLICE_TBF]);
|
2006-12-01 03:54:05 +00:00
|
|
|
if (size != sizeof(*parm) && size != sizeof(struct tc_police_compat))
|
2005-04-16 22:20:36 +00:00
|
|
|
return -EINVAL;
|
2008-01-23 06:11:50 +00:00
|
|
|
parm = nla_data(tb[TCA_POLICE_TBF]);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-08-22 06:54:55 +00:00
|
|
|
if (parm->index) {
|
|
|
|
struct tcf_common *pc;
|
|
|
|
|
|
|
|
pc = tcf_hash_lookup(parm->index, &police_hash_info);
|
|
|
|
if (pc != NULL) {
|
|
|
|
a->priv = pc;
|
|
|
|
police = to_police(pc);
|
|
|
|
if (bind) {
|
|
|
|
police->tcf_bindcnt += 1;
|
|
|
|
police->tcf_refcnt += 1;
|
|
|
|
}
|
|
|
|
if (ovr)
|
|
|
|
goto override;
|
|
|
|
return ret;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2006-08-22 06:54:55 +00:00
|
|
|
police = kzalloc(sizeof(*police), GFP_KERNEL);
|
|
|
|
if (police == NULL)
|
2005-04-16 22:20:36 +00:00
|
|
|
return -ENOMEM;
|
|
|
|
ret = ACT_P_CREATED;
|
2006-08-22 06:54:55 +00:00
|
|
|
police->tcf_refcnt = 1;
|
|
|
|
spin_lock_init(&police->tcf_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (bind)
|
2006-08-22 06:54:55 +00:00
|
|
|
police->tcf_bindcnt = 1;
|
2005-04-16 22:20:36 +00:00
|
|
|
override:
|
|
|
|
if (parm->rate.rate) {
|
|
|
|
err = -ENOMEM;
|
2008-01-23 06:11:50 +00:00
|
|
|
R_tab = qdisc_get_rtab(&parm->rate, tb[TCA_POLICE_RATE]);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (R_tab == NULL)
|
|
|
|
goto failure;
|
2008-11-26 05:14:06 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
if (parm->peakrate.rate) {
|
|
|
|
P_tab = qdisc_get_rtab(&parm->peakrate,
|
2008-01-23 06:11:50 +00:00
|
|
|
tb[TCA_POLICE_PEAKRATE]);
|
2008-11-26 05:13:31 +00:00
|
|
|
if (P_tab == NULL)
|
2005-04-16 22:20:36 +00:00
|
|
|
goto failure;
|
|
|
|
}
|
|
|
|
}
|
2008-11-26 05:13:31 +00:00
|
|
|
|
2006-08-22 06:54:55 +00:00
|
|
|
spin_lock_bh(&police->tcf_lock);
|
2008-11-26 05:13:31 +00:00
|
|
|
if (est) {
|
|
|
|
err = gen_replace_estimator(&police->tcf_bstats,
|
|
|
|
&police->tcf_rate_est,
|
|
|
|
&police->tcf_lock, est);
|
|
|
|
if (err)
|
|
|
|
goto failure_unlock;
|
2009-03-05 01:38:10 +00:00
|
|
|
} else if (tb[TCA_POLICE_AVRATE] &&
|
|
|
|
(ret == ACT_P_CREATED ||
|
|
|
|
!gen_estimator_active(&police->tcf_bstats,
|
|
|
|
&police->tcf_rate_est))) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto failure_unlock;
|
2008-11-26 05:13:31 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* No failure allowed after this point */
|
2005-04-16 22:20:36 +00:00
|
|
|
if (R_tab != NULL) {
|
2006-08-22 06:54:55 +00:00
|
|
|
qdisc_put_rtab(police->tcfp_R_tab);
|
|
|
|
police->tcfp_R_tab = R_tab;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
if (P_tab != NULL) {
|
2006-08-22 06:54:55 +00:00
|
|
|
qdisc_put_rtab(police->tcfp_P_tab);
|
|
|
|
police->tcfp_P_tab = P_tab;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2008-01-23 06:11:50 +00:00
|
|
|
if (tb[TCA_POLICE_RESULT])
|
2008-01-24 04:35:03 +00:00
|
|
|
police->tcfp_result = nla_get_u32(tb[TCA_POLICE_RESULT]);
|
2006-08-22 06:54:55 +00:00
|
|
|
police->tcfp_toks = police->tcfp_burst = parm->burst;
|
|
|
|
police->tcfp_mtu = parm->mtu;
|
|
|
|
if (police->tcfp_mtu == 0) {
|
|
|
|
police->tcfp_mtu = ~0;
|
|
|
|
if (police->tcfp_R_tab)
|
|
|
|
police->tcfp_mtu = 255<<police->tcfp_R_tab->rate.cell_log;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
2006-08-22 06:54:55 +00:00
|
|
|
if (police->tcfp_P_tab)
|
|
|
|
police->tcfp_ptoks = L2T_P(police, police->tcfp_mtu);
|
|
|
|
police->tcf_action = parm->action;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-01-23 06:11:50 +00:00
|
|
|
if (tb[TCA_POLICE_AVRATE])
|
2008-01-24 04:35:03 +00:00
|
|
|
police->tcfp_ewma_rate = nla_get_u32(tb[TCA_POLICE_AVRATE]);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-08-22 06:54:55 +00:00
|
|
|
spin_unlock_bh(&police->tcf_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (ret != ACT_P_CREATED)
|
|
|
|
return ret;
|
|
|
|
|
2007-03-23 18:29:25 +00:00
|
|
|
police->tcfp_t_c = psched_get_time();
|
2006-08-22 06:54:55 +00:00
|
|
|
police->tcf_index = parm->index ? parm->index :
|
|
|
|
tcf_hash_new_index(&police_idx_gen, &police_hash_info);
|
|
|
|
h = tcf_hash(police->tcf_index, POL_TAB_MASK);
|
2005-04-16 22:20:36 +00:00
|
|
|
write_lock_bh(&police_lock);
|
2006-08-22 06:54:55 +00:00
|
|
|
police->tcf_next = tcf_police_ht[h];
|
|
|
|
tcf_police_ht[h] = &police->common;
|
2005-04-16 22:20:36 +00:00
|
|
|
write_unlock_bh(&police_lock);
|
|
|
|
|
2006-08-22 06:54:55 +00:00
|
|
|
a->priv = police;
|
2005-04-16 22:20:36 +00:00
|
|
|
return ret;
|
|
|
|
|
2008-11-26 05:13:31 +00:00
|
|
|
failure_unlock:
|
|
|
|
spin_unlock_bh(&police->tcf_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
failure:
|
2008-11-26 05:13:31 +00:00
|
|
|
if (P_tab)
|
|
|
|
qdisc_put_rtab(P_tab);
|
|
|
|
if (R_tab)
|
|
|
|
qdisc_put_rtab(R_tab);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (ret == ACT_P_CREATED)
|
2006-08-22 06:54:55 +00:00
|
|
|
kfree(police);
|
2005-04-16 22:20:36 +00:00
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int tcf_act_police_cleanup(struct tc_action *a, int bind)
|
|
|
|
{
|
2006-08-22 06:54:55 +00:00
|
|
|
struct tcf_police *p = a->priv;
|
2007-07-15 07:03:05 +00:00
|
|
|
int ret = 0;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-07-15 07:03:05 +00:00
|
|
|
if (p != NULL) {
|
|
|
|
if (bind)
|
|
|
|
p->tcf_bindcnt--;
|
|
|
|
|
|
|
|
p->tcf_refcnt--;
|
|
|
|
if (p->tcf_refcnt <= 0 && !p->tcf_bindcnt) {
|
|
|
|
tcf_police_destroy(p);
|
|
|
|
ret = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return ret;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2006-01-09 06:15:34 +00:00
|
|
|
static int tcf_act_police(struct sk_buff *skb, struct tc_action *a,
|
2007-02-09 14:25:16 +00:00
|
|
|
struct tcf_result *res)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2006-08-22 06:54:55 +00:00
|
|
|
struct tcf_police *police = a->priv;
|
2005-04-16 22:20:36 +00:00
|
|
|
psched_time_t now;
|
|
|
|
long toks;
|
|
|
|
long ptoks = 0;
|
|
|
|
|
2006-08-22 06:54:55 +00:00
|
|
|
spin_lock(&police->tcf_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-07-20 07:08:27 +00:00
|
|
|
police->tcf_bstats.bytes += qdisc_pkt_len(skb);
|
2006-08-22 06:54:55 +00:00
|
|
|
police->tcf_bstats.packets++;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-08-22 06:54:55 +00:00
|
|
|
if (police->tcfp_ewma_rate &&
|
|
|
|
police->tcf_rate_est.bps >= police->tcfp_ewma_rate) {
|
|
|
|
police->tcf_qstats.overlimits++;
|
|
|
|
spin_unlock(&police->tcf_lock);
|
|
|
|
return police->tcf_action;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2008-07-20 07:08:27 +00:00
|
|
|
if (qdisc_pkt_len(skb) <= police->tcfp_mtu) {
|
2006-08-22 06:54:55 +00:00
|
|
|
if (police->tcfp_R_tab == NULL) {
|
|
|
|
spin_unlock(&police->tcf_lock);
|
|
|
|
return police->tcfp_result;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2007-03-23 18:29:25 +00:00
|
|
|
now = psched_get_time();
|
2007-03-23 18:29:11 +00:00
|
|
|
toks = psched_tdiff_bounded(now, police->tcfp_t_c,
|
|
|
|
police->tcfp_burst);
|
2006-08-22 06:54:55 +00:00
|
|
|
if (police->tcfp_P_tab) {
|
|
|
|
ptoks = toks + police->tcfp_ptoks;
|
|
|
|
if (ptoks > (long)L2T_P(police, police->tcfp_mtu))
|
|
|
|
ptoks = (long)L2T_P(police, police->tcfp_mtu);
|
2008-07-20 07:08:27 +00:00
|
|
|
ptoks -= L2T_P(police, qdisc_pkt_len(skb));
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
2006-08-22 06:54:55 +00:00
|
|
|
toks += police->tcfp_toks;
|
|
|
|
if (toks > (long)police->tcfp_burst)
|
|
|
|
toks = police->tcfp_burst;
|
2008-07-20 07:08:27 +00:00
|
|
|
toks -= L2T(police, qdisc_pkt_len(skb));
|
2005-04-16 22:20:36 +00:00
|
|
|
if ((toks|ptoks) >= 0) {
|
2006-08-22 06:54:55 +00:00
|
|
|
police->tcfp_t_c = now;
|
|
|
|
police->tcfp_toks = toks;
|
|
|
|
police->tcfp_ptoks = ptoks;
|
|
|
|
spin_unlock(&police->tcf_lock);
|
|
|
|
return police->tcfp_result;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2006-08-22 06:54:55 +00:00
|
|
|
police->tcf_qstats.overlimits++;
|
|
|
|
spin_unlock(&police->tcf_lock);
|
|
|
|
return police->tcf_action;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
tcf_act_police_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
|
|
|
|
{
|
2007-04-20 03:29:13 +00:00
|
|
|
unsigned char *b = skb_tail_pointer(skb);
|
2006-08-22 06:54:55 +00:00
|
|
|
struct tcf_police *police = a->priv;
|
2005-04-16 22:20:36 +00:00
|
|
|
struct tc_police opt;
|
2006-08-22 06:54:55 +00:00
|
|
|
|
|
|
|
opt.index = police->tcf_index;
|
|
|
|
opt.action = police->tcf_action;
|
|
|
|
opt.mtu = police->tcfp_mtu;
|
|
|
|
opt.burst = police->tcfp_burst;
|
|
|
|
opt.refcnt = police->tcf_refcnt - ref;
|
|
|
|
opt.bindcnt = police->tcf_bindcnt - bind;
|
|
|
|
if (police->tcfp_R_tab)
|
|
|
|
opt.rate = police->tcfp_R_tab->rate;
|
2005-04-16 22:20:36 +00:00
|
|
|
else
|
|
|
|
memset(&opt.rate, 0, sizeof(opt.rate));
|
2006-08-22 06:54:55 +00:00
|
|
|
if (police->tcfp_P_tab)
|
|
|
|
opt.peakrate = police->tcfp_P_tab->rate;
|
2005-04-16 22:20:36 +00:00
|
|
|
else
|
|
|
|
memset(&opt.peakrate, 0, sizeof(opt.peakrate));
|
2008-01-23 06:11:50 +00:00
|
|
|
NLA_PUT(skb, TCA_POLICE_TBF, sizeof(opt), &opt);
|
2006-08-22 06:54:55 +00:00
|
|
|
if (police->tcfp_result)
|
2008-01-24 04:34:48 +00:00
|
|
|
NLA_PUT_U32(skb, TCA_POLICE_RESULT, police->tcfp_result);
|
2006-08-22 06:54:55 +00:00
|
|
|
if (police->tcfp_ewma_rate)
|
2008-01-24 04:34:48 +00:00
|
|
|
NLA_PUT_U32(skb, TCA_POLICE_AVRATE, police->tcfp_ewma_rate);
|
2005-04-16 22:20:36 +00:00
|
|
|
return skb->len;
|
|
|
|
|
2008-01-23 06:11:50 +00:00
|
|
|
nla_put_failure:
|
2007-03-26 06:06:12 +00:00
|
|
|
nlmsg_trim(skb, b);
|
2005-04-16 22:20:36 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Alexey Kuznetsov");
|
|
|
|
MODULE_DESCRIPTION("Policing actions");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
|
|
static struct tc_action_ops act_police_ops = {
|
|
|
|
.kind = "police",
|
2006-08-22 06:54:55 +00:00
|
|
|
.hinfo = &police_hash_info,
|
2005-04-16 22:20:36 +00:00
|
|
|
.type = TCA_ID_POLICE,
|
|
|
|
.capab = TCA_CAP_NONE,
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.act = tcf_act_police,
|
|
|
|
.dump = tcf_act_police_dump,
|
|
|
|
.cleanup = tcf_act_police_cleanup,
|
2006-08-22 06:54:55 +00:00
|
|
|
.lookup = tcf_hash_search,
|
2005-04-16 22:20:36 +00:00
|
|
|
.init = tcf_act_police_locate,
|
2006-04-07 05:24:22 +00:00
|
|
|
.walk = tcf_act_police_walker
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
static int __init
|
|
|
|
police_init_module(void)
|
|
|
|
{
|
|
|
|
return tcf_register_action(&act_police_ops);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit
|
|
|
|
police_cleanup_module(void)
|
|
|
|
{
|
|
|
|
tcf_unregister_action(&act_police_ops);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(police_init_module);
|
|
|
|
module_exit(police_cleanup_module);
|