[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/net/sched/act_police.c b/src/kernel/linux/v4.14/net/sched/act_police.c
new file mode 100644
index 0000000..a7fcc59
--- /dev/null
+++ b/src/kernel/linux/v4.14/net/sched/act_police.c
@@ -0,0 +1,362 @@
+/*
+ * net/sched/act_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 <linux/slab.h>
+#include <net/act_api.h>
+#include <net/netlink.h>
+
+struct tcf_police {
+ struct tc_action common;
+ int tcfp_result;
+ u32 tcfp_ewma_rate;
+ s64 tcfp_burst;
+ u32 tcfp_mtu;
+ s64 tcfp_toks;
+ s64 tcfp_ptoks;
+ s64 tcfp_mtu_ptoks;
+ s64 tcfp_t_c;
+ struct psched_ratecfg rate;
+ bool rate_present;
+ struct psched_ratecfg peak;
+ bool peak_present;
+};
+
+#define to_police(pc) ((struct tcf_police *)pc)
+
+/* 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;
+};
+
+/* Each policer is serialized by its individual spinlock */
+
+static unsigned int police_net_id;
+static struct tc_action_ops act_police_ops;
+
+static int tcf_act_police_walker(struct net *net, struct sk_buff *skb,
+ struct netlink_callback *cb, int type,
+ const struct tc_action_ops *ops)
+{
+ struct tc_action_net *tn = net_generic(net, police_net_id);
+
+ return tcf_generic_walker(tn, skb, cb, type, ops);
+}
+
+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 },
+};
+
+static int tcf_act_police_init(struct net *net, struct nlattr *nla,
+ struct nlattr *est, struct tc_action **a,
+ int ovr, int bind)
+{
+ int ret = 0, err;
+ struct nlattr *tb[TCA_POLICE_MAX + 1];
+ struct tc_police *parm;
+ struct tcf_police *police;
+ struct qdisc_rate_table *R_tab = NULL, *P_tab = NULL;
+ struct tc_action_net *tn = net_generic(net, police_net_id);
+ bool exists = false;
+ int size;
+
+ if (nla == NULL)
+ return -EINVAL;
+
+ err = nla_parse_nested(tb, TCA_POLICE_MAX, nla, police_policy, NULL);
+ if (err < 0)
+ return err;
+
+ if (tb[TCA_POLICE_TBF] == NULL)
+ return -EINVAL;
+ size = nla_len(tb[TCA_POLICE_TBF]);
+ if (size != sizeof(*parm) && size != sizeof(struct tc_police_compat))
+ return -EINVAL;
+
+ parm = nla_data(tb[TCA_POLICE_TBF]);
+ exists = tcf_idr_check(tn, parm->index, a, bind);
+ if (exists && bind)
+ return 0;
+
+ if (!exists) {
+ ret = tcf_idr_create(tn, parm->index, NULL, a,
+ &act_police_ops, bind, false);
+ if (ret)
+ return ret;
+ ret = ACT_P_CREATED;
+ } else {
+ tcf_idr_release(*a, bind);
+ if (!ovr)
+ return -EEXIST;
+ }
+
+ police = to_police(*a);
+ if (parm->rate.rate) {
+ err = -ENOMEM;
+ R_tab = qdisc_get_rtab(&parm->rate, tb[TCA_POLICE_RATE]);
+ if (R_tab == NULL)
+ goto failure;
+
+ if (parm->peakrate.rate) {
+ P_tab = qdisc_get_rtab(&parm->peakrate,
+ tb[TCA_POLICE_PEAKRATE]);
+ if (P_tab == NULL)
+ goto failure;
+ }
+ }
+
+ if (est) {
+ err = gen_replace_estimator(&police->tcf_bstats, NULL,
+ &police->tcf_rate_est,
+ &police->tcf_lock,
+ NULL, est);
+ if (err)
+ goto failure;
+ } else if (tb[TCA_POLICE_AVRATE] &&
+ (ret == ACT_P_CREATED ||
+ !gen_estimator_active(&police->tcf_rate_est))) {
+ err = -EINVAL;
+ goto failure;
+ }
+
+ spin_lock_bh(&police->tcf_lock);
+ /* No failure allowed after this point */
+ police->tcfp_mtu = parm->mtu;
+ if (police->tcfp_mtu == 0) {
+ police->tcfp_mtu = ~0;
+ if (R_tab)
+ police->tcfp_mtu = 255 << R_tab->rate.cell_log;
+ }
+ if (R_tab) {
+ police->rate_present = true;
+ psched_ratecfg_precompute(&police->rate, &R_tab->rate, 0);
+ qdisc_put_rtab(R_tab);
+ } else {
+ police->rate_present = false;
+ }
+ if (P_tab) {
+ police->peak_present = true;
+ psched_ratecfg_precompute(&police->peak, &P_tab->rate, 0);
+ qdisc_put_rtab(P_tab);
+ } else {
+ police->peak_present = false;
+ }
+
+ if (tb[TCA_POLICE_RESULT])
+ police->tcfp_result = nla_get_u32(tb[TCA_POLICE_RESULT]);
+ police->tcfp_burst = PSCHED_TICKS2NS(parm->burst);
+ police->tcfp_toks = police->tcfp_burst;
+ if (police->peak_present) {
+ police->tcfp_mtu_ptoks = (s64) psched_l2t_ns(&police->peak,
+ police->tcfp_mtu);
+ police->tcfp_ptoks = police->tcfp_mtu_ptoks;
+ }
+ police->tcf_action = parm->action;
+
+ if (tb[TCA_POLICE_AVRATE])
+ police->tcfp_ewma_rate = nla_get_u32(tb[TCA_POLICE_AVRATE]);
+
+ spin_unlock_bh(&police->tcf_lock);
+ if (ret != ACT_P_CREATED)
+ return ret;
+
+ police->tcfp_t_c = ktime_get_ns();
+ tcf_idr_insert(tn, *a);
+
+ return ret;
+
+failure:
+ qdisc_put_rtab(P_tab);
+ qdisc_put_rtab(R_tab);
+ if (ret == ACT_P_CREATED)
+ tcf_idr_release(*a, bind);
+ return err;
+}
+
+static int tcf_act_police(struct sk_buff *skb, const struct tc_action *a,
+ struct tcf_result *res)
+{
+ struct tcf_police *police = to_police(a);
+ s64 now;
+ s64 toks;
+ s64 ptoks = 0;
+
+ spin_lock(&police->tcf_lock);
+
+ bstats_update(&police->tcf_bstats, skb);
+ tcf_lastuse_update(&police->tcf_tm);
+
+ 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 (!police->rate_present) {
+ spin_unlock(&police->tcf_lock);
+ return police->tcfp_result;
+ }
+
+ now = ktime_get_ns();
+ toks = min_t(s64, now - police->tcfp_t_c,
+ police->tcfp_burst);
+ if (police->peak_present) {
+ ptoks = toks + police->tcfp_ptoks;
+ if (ptoks > police->tcfp_mtu_ptoks)
+ ptoks = police->tcfp_mtu_ptoks;
+ ptoks -= (s64) psched_l2t_ns(&police->peak,
+ qdisc_pkt_len(skb));
+ }
+ toks += police->tcfp_toks;
+ if (toks > police->tcfp_burst)
+ toks = police->tcfp_burst;
+ toks -= (s64) psched_l2t_ns(&police->rate, qdisc_pkt_len(skb));
+ if ((toks|ptoks) >= 0) {
+ police->tcfp_t_c = now;
+ police->tcfp_toks = toks;
+ police->tcfp_ptoks = ptoks;
+ if (police->tcfp_result == TC_ACT_SHOT)
+ police->tcf_qstats.drops++;
+ spin_unlock(&police->tcf_lock);
+ return police->tcfp_result;
+ }
+ }
+
+ police->tcf_qstats.overlimits++;
+ if (police->tcf_action == TC_ACT_SHOT)
+ police->tcf_qstats.drops++;
+ spin_unlock(&police->tcf_lock);
+ return police->tcf_action;
+}
+
+static int tcf_act_police_dump(struct sk_buff *skb, struct tc_action *a,
+ int bind, int ref)
+{
+ unsigned char *b = skb_tail_pointer(skb);
+ struct tcf_police *police = to_police(a);
+ struct tc_police opt = {
+ .index = police->tcf_index,
+ .action = police->tcf_action,
+ .mtu = police->tcfp_mtu,
+ .burst = PSCHED_NS2TICKS(police->tcfp_burst),
+ .refcnt = police->tcf_refcnt - ref,
+ .bindcnt = police->tcf_bindcnt - bind,
+ };
+ struct tcf_t t;
+
+ if (police->rate_present)
+ psched_ratecfg_getrate(&opt.rate, &police->rate);
+ if (police->peak_present)
+ psched_ratecfg_getrate(&opt.peakrate, &police->peak);
+ if (nla_put(skb, TCA_POLICE_TBF, sizeof(opt), &opt))
+ goto nla_put_failure;
+ if (police->tcfp_result &&
+ nla_put_u32(skb, TCA_POLICE_RESULT, police->tcfp_result))
+ goto nla_put_failure;
+ if (police->tcfp_ewma_rate &&
+ nla_put_u32(skb, TCA_POLICE_AVRATE, police->tcfp_ewma_rate))
+ goto nla_put_failure;
+
+ t.install = jiffies_to_clock_t(jiffies - police->tcf_tm.install);
+ t.lastuse = jiffies_to_clock_t(jiffies - police->tcf_tm.lastuse);
+ t.firstuse = jiffies_to_clock_t(jiffies - police->tcf_tm.firstuse);
+ t.expires = jiffies_to_clock_t(police->tcf_tm.expires);
+ if (nla_put_64bit(skb, TCA_POLICE_TM, sizeof(t), &t, TCA_POLICE_PAD))
+ goto nla_put_failure;
+
+ return skb->len;
+
+nla_put_failure:
+ nlmsg_trim(skb, b);
+ return -1;
+}
+
+static int tcf_police_search(struct net *net, struct tc_action **a, u32 index)
+{
+ struct tc_action_net *tn = net_generic(net, police_net_id);
+
+ return tcf_idr_search(tn, a, index);
+}
+
+MODULE_AUTHOR("Alexey Kuznetsov");
+MODULE_DESCRIPTION("Policing actions");
+MODULE_LICENSE("GPL");
+
+static struct tc_action_ops act_police_ops = {
+ .kind = "police",
+ .type = TCA_ID_POLICE,
+ .owner = THIS_MODULE,
+ .act = tcf_act_police,
+ .dump = tcf_act_police_dump,
+ .init = tcf_act_police_init,
+ .walk = tcf_act_police_walker,
+ .lookup = tcf_police_search,
+ .size = sizeof(struct tcf_police),
+};
+
+static __net_init int police_init_net(struct net *net)
+{
+ struct tc_action_net *tn = net_generic(net, police_net_id);
+
+ return tc_action_net_init(net, tn, &act_police_ops);
+}
+
+static void __net_exit police_exit_net(struct net *net)
+{
+ struct tc_action_net *tn = net_generic(net, police_net_id);
+
+ tc_action_net_exit(tn);
+}
+
+static struct pernet_operations police_net_ops = {
+ .init = police_init_net,
+ .exit = police_exit_net,
+ .id = &police_net_id,
+ .size = sizeof(struct tc_action_net),
+};
+
+static int __init police_init_module(void)
+{
+ return tcf_register_action(&act_police_ops, &police_net_ops);
+}
+
+static void __exit police_cleanup_module(void)
+{
+ tcf_unregister_action(&act_police_ops, &police_net_ops);
+}
+
+module_init(police_init_module);
+module_exit(police_cleanup_module);