* J Hadi Salim (action changes)
*/
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <linux/bitops.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/socket.h>
-#include <linux/sockios.h>
-#include <linux/in.h>
#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/netdevice.h>
#include <linux/skbuff.h>
-#include <linux/module.h>
#include <linux/rtnetlink.h>
#include <linux/init.h>
-#include <net/sock.h>
#include <net/act_api.h>
#include <net/netlink.h>
/* Each policer is serialized by its individual spinlock */
-#ifdef CONFIG_NET_CLS_ACT
static int tcf_act_police_walker(struct sk_buff *skb, struct netlink_callback *cb,
int type, struct tc_action *a)
{
nlmsg_trim(skb, r);
goto done;
}
-#endif
-void tcf_police_destroy(struct tcf_police *p)
+static void tcf_police_destroy(struct tcf_police *p)
{
unsigned int h = tcf_hash(p->tcf_index, POL_TAB_MASK);
struct tcf_common **p1p;
write_lock_bh(&police_lock);
*p1p = p->tcf_next;
write_unlock_bh(&police_lock);
-#ifdef CONFIG_NET_ESTIMATOR
gen_kill_estimator(&p->tcf_bstats,
&p->tcf_rate_est);
-#endif
if (p->tcfp_R_tab)
qdisc_put_rtab(p->tcfp_R_tab);
if (p->tcfp_P_tab)
BUG_TRAP(0);
}
-#ifdef CONFIG_NET_CLS_ACT
static int tcf_act_police_locate(struct rtattr *rta, struct rtattr *est,
struct tc_action *a, int ovr, int bind)
{
ret = ACT_P_CREATED;
police->tcf_refcnt = 1;
spin_lock_init(&police->tcf_lock);
- police->tcf_stats_lock = &police->tcf_lock;
if (bind)
police->tcf_bindcnt = 1;
override:
police->tcfp_ptoks = L2T_P(police, police->tcfp_mtu);
police->tcf_action = parm->action;
-#ifdef CONFIG_NET_ESTIMATOR
if (tb[TCA_POLICE_AVRATE-1])
police->tcfp_ewma_rate =
*(u32*)RTA_DATA(tb[TCA_POLICE_AVRATE-1]);
if (est)
gen_replace_estimator(&police->tcf_bstats,
&police->tcf_rate_est,
- police->tcf_stats_lock, est);
-#endif
+ &police->tcf_lock, est);
spin_unlock_bh(&police->tcf_lock);
if (ret != ACT_P_CREATED)
static int tcf_act_police_cleanup(struct tc_action *a, int bind)
{
struct tcf_police *p = a->priv;
+ int ret = 0;
+
+ if (p != NULL) {
+ if (bind)
+ p->tcf_bindcnt--;
- if (p != NULL)
- return tcf_police_release(p, bind);
- return 0;
+ p->tcf_refcnt--;
+ if (p->tcf_refcnt <= 0 && !p->tcf_bindcnt) {
+ tcf_police_destroy(p);
+ ret = 1;
+ }
+ }
+ return ret;
}
static int tcf_act_police(struct sk_buff *skb, struct tc_action *a,
police->tcf_bstats.bytes += skb->len;
police->tcf_bstats.packets++;
-#ifdef CONFIG_NET_ESTIMATOR
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;
}
-#endif
if (skb->len <= police->tcfp_mtu) {
if (police->tcfp_R_tab == NULL) {
if (police->tcfp_result)
RTA_PUT(skb, TCA_POLICE_RESULT, sizeof(int),
&police->tcfp_result);
-#ifdef CONFIG_NET_ESTIMATOR
if (police->tcfp_ewma_rate)
RTA_PUT(skb, TCA_POLICE_AVRATE, 4, &police->tcfp_ewma_rate);
-#endif
return skb->len;
rtattr_failure:
module_init(police_init_module);
module_exit(police_cleanup_module);
-
-#else /* CONFIG_NET_CLS_ACT */
-
-static struct tcf_common *tcf_police_lookup(u32 index)
-{
- struct tcf_hashinfo *hinfo = &police_hash_info;
- struct tcf_common *p;
-
- read_lock(hinfo->lock);
- for (p = hinfo->htab[tcf_hash(index, hinfo->hmask)]; p;
- p = p->tcfc_next) {
- if (p->tcfc_index == index)
- break;
- }
- read_unlock(hinfo->lock);
-
- return p;
-}
-
-static u32 tcf_police_new_index(void)
-{
- u32 *idx_gen = &police_idx_gen;
- u32 val = *idx_gen;
-
- do {
- if (++val == 0)
- val = 1;
- } while (tcf_police_lookup(val));
-
- return (*idx_gen = val);
-}
-
-struct tcf_police *tcf_police_locate(struct rtattr *rta, struct rtattr *est)
-{
- unsigned int h;
- struct tcf_police *police;
- struct rtattr *tb[TCA_POLICE_MAX];
- struct tc_police *parm;
- int size;
-
- if (rtattr_parse_nested(tb, TCA_POLICE_MAX, rta) < 0)
- return NULL;
-
- if (tb[TCA_POLICE_TBF-1] == NULL)
- return NULL;
- size = RTA_PAYLOAD(tb[TCA_POLICE_TBF-1]);
- if (size != sizeof(*parm) && size != sizeof(struct tc_police_compat))
- return NULL;
-
- parm = RTA_DATA(tb[TCA_POLICE_TBF-1]);
-
- if (parm->index) {
- struct tcf_common *pc;
-
- pc = tcf_police_lookup(parm->index);
- if (pc) {
- police = to_police(pc);
- police->tcf_refcnt++;
- return police;
- }
- }
- police = kzalloc(sizeof(*police), GFP_KERNEL);
- if (unlikely(!police))
- return NULL;
-
- police->tcf_refcnt = 1;
- spin_lock_init(&police->tcf_lock);
- police->tcf_stats_lock = &police->tcf_lock;
- if (parm->rate.rate) {
- police->tcfp_R_tab =
- qdisc_get_rtab(&parm->rate, tb[TCA_POLICE_RATE-1]);
- if (police->tcfp_R_tab == NULL)
- goto failure;
- if (parm->peakrate.rate) {
- police->tcfp_P_tab =
- qdisc_get_rtab(&parm->peakrate,
- tb[TCA_POLICE_PEAKRATE-1]);
- if (police->tcfp_P_tab == NULL)
- goto failure;
- }
- }
- if (tb[TCA_POLICE_RESULT-1]) {
- if (RTA_PAYLOAD(tb[TCA_POLICE_RESULT-1]) != sizeof(u32))
- goto failure;
- police->tcfp_result = *(u32*)RTA_DATA(tb[TCA_POLICE_RESULT-1]);
- }
-#ifdef CONFIG_NET_ESTIMATOR
- if (tb[TCA_POLICE_AVRATE-1]) {
- if (RTA_PAYLOAD(tb[TCA_POLICE_AVRATE-1]) != sizeof(u32))
- goto failure;
- police->tcfp_ewma_rate =
- *(u32*)RTA_DATA(tb[TCA_POLICE_AVRATE-1]);
- }
-#endif
- 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;
- }
- if (police->tcfp_P_tab)
- police->tcfp_ptoks = L2T_P(police, police->tcfp_mtu);
- police->tcfp_t_c = psched_get_time();
- police->tcf_index = parm->index ? parm->index :
- tcf_police_new_index();
- police->tcf_action = parm->action;
-#ifdef CONFIG_NET_ESTIMATOR
- if (est)
- gen_new_estimator(&police->tcf_bstats, &police->tcf_rate_est,
- police->tcf_stats_lock, est);
-#endif
- h = tcf_hash(police->tcf_index, POL_TAB_MASK);
- write_lock_bh(&police_lock);
- police->tcf_next = tcf_police_ht[h];
- tcf_police_ht[h] = &police->common;
- write_unlock_bh(&police_lock);
- return police;
-
-failure:
- if (police->tcfp_R_tab)
- qdisc_put_rtab(police->tcfp_R_tab);
- kfree(police);
- return NULL;
-}
-
-int tcf_police(struct sk_buff *skb, struct tcf_police *police)
-{
- psched_time_t now;
- long toks;
- long ptoks = 0;
-
- spin_lock(&police->tcf_lock);
-
- police->tcf_bstats.bytes += skb->len;
- police->tcf_bstats.packets++;
-
-#ifdef CONFIG_NET_ESTIMATOR
- 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;
- }
-#endif
- if (skb->len <= police->tcfp_mtu) {
- if (police->tcfp_R_tab == NULL) {
- spin_unlock(&police->tcf_lock);
- return police->tcfp_result;
- }
-
- now = psched_get_time();
- toks = psched_tdiff_bounded(now, police->tcfp_t_c,
- police->tcfp_burst);
- 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);
- ptoks -= L2T_P(police, skb->len);
- }
- toks += police->tcfp_toks;
- if (toks > (long)police->tcfp_burst)
- toks = police->tcfp_burst;
- toks -= L2T(police, skb->len);
- if ((toks|ptoks) >= 0) {
- police->tcfp_t_c = now;
- police->tcfp_toks = toks;
- police->tcfp_ptoks = ptoks;
- spin_unlock(&police->tcf_lock);
- return police->tcfp_result;
- }
- }
-
- police->tcf_qstats.overlimits++;
- spin_unlock(&police->tcf_lock);
- return police->tcf_action;
-}
-EXPORT_SYMBOL(tcf_police);
-
-int tcf_police_dump(struct sk_buff *skb, struct tcf_police *police)
-{
- unsigned char *b = skb_tail_pointer(skb);
- struct tc_police opt;
-
- opt.index = police->tcf_index;
- opt.action = police->tcf_action;
- opt.mtu = police->tcfp_mtu;
- opt.burst = police->tcfp_burst;
- if (police->tcfp_R_tab)
- opt.rate = police->tcfp_R_tab->rate;
- else
- memset(&opt.rate, 0, sizeof(opt.rate));
- if (police->tcfp_P_tab)
- opt.peakrate = police->tcfp_P_tab->rate;
- else
- memset(&opt.peakrate, 0, sizeof(opt.peakrate));
- RTA_PUT(skb, TCA_POLICE_TBF, sizeof(opt), &opt);
- if (police->tcfp_result)
- RTA_PUT(skb, TCA_POLICE_RESULT, sizeof(int),
- &police->tcfp_result);
-#ifdef CONFIG_NET_ESTIMATOR
- if (police->tcfp_ewma_rate)
- RTA_PUT(skb, TCA_POLICE_AVRATE, 4, &police->tcfp_ewma_rate);
-#endif
- return skb->len;
-
-rtattr_failure:
- nlmsg_trim(skb, b);
- return -1;
-}
-
-int tcf_police_dump_stats(struct sk_buff *skb, struct tcf_police *police)
-{
- struct gnet_dump d;
-
- if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS,
- TCA_XSTATS, police->tcf_stats_lock,
- &d) < 0)
- goto errout;
-
- if (gnet_stats_copy_basic(&d, &police->tcf_bstats) < 0 ||
-#ifdef CONFIG_NET_ESTIMATOR
- gnet_stats_copy_rate_est(&d, &police->tcf_rate_est) < 0 ||
-#endif
- gnet_stats_copy_queue(&d, &police->tcf_qstats) < 0)
- goto errout;
-
- if (gnet_stats_finish_copy(&d) < 0)
- goto errout;
-
- return 0;
-
-errout:
- return -1;
-}
-
-#endif /* CONFIG_NET_CLS_ACT */
git.openpandora.org / pandora-kernel.git / blobdiff