[Feature] add GA346 baseline version
Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/net/sched/act_gact.c b/src/kernel/linux/v4.19/net/sched/act_gact.c
new file mode 100644
index 0000000..dfef962
--- /dev/null
+++ b/src/kernel/linux/v4.19/net/sched/act_gact.c
@@ -0,0 +1,302 @@
+/*
+ * net/sched/act_gact.c Generic actions
+ *
+ * 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.
+ *
+ * copyright Jamal Hadi Salim (2002-4)
+ *
+ */
+
+#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/module.h>
+#include <linux/init.h>
+#include <net/netlink.h>
+#include <net/pkt_sched.h>
+#include <linux/tc_act/tc_gact.h>
+#include <net/tc_act/tc_gact.h>
+
+static unsigned int gact_net_id;
+static struct tc_action_ops act_gact_ops;
+
+#ifdef CONFIG_GACT_PROB
+static int gact_net_rand(struct tcf_gact *gact)
+{
+ smp_rmb(); /* coupled with smp_wmb() in tcf_gact_init() */
+ if (prandom_u32() % gact->tcfg_pval)
+ return gact->tcf_action;
+ return gact->tcfg_paction;
+}
+
+static int gact_determ(struct tcf_gact *gact)
+{
+ u32 pack = atomic_inc_return(&gact->packets);
+
+ smp_rmb(); /* coupled with smp_wmb() in tcf_gact_init() */
+ if (pack % gact->tcfg_pval)
+ return gact->tcf_action;
+ return gact->tcfg_paction;
+}
+
+typedef int (*g_rand)(struct tcf_gact *gact);
+static g_rand gact_rand[MAX_RAND] = { NULL, gact_net_rand, gact_determ };
+#endif /* CONFIG_GACT_PROB */
+
+static const struct nla_policy gact_policy[TCA_GACT_MAX + 1] = {
+ [TCA_GACT_PARMS] = { .len = sizeof(struct tc_gact) },
+ [TCA_GACT_PROB] = { .len = sizeof(struct tc_gact_p) },
+};
+
+static int tcf_gact_init(struct net *net, struct nlattr *nla,
+ struct nlattr *est, struct tc_action **a,
+ int ovr, int bind, bool rtnl_held,
+ struct netlink_ext_ack *extack)
+{
+ struct tc_action_net *tn = net_generic(net, gact_net_id);
+ struct nlattr *tb[TCA_GACT_MAX + 1];
+ struct tc_gact *parm;
+ struct tcf_gact *gact;
+ int ret = 0;
+ u32 index;
+ int err;
+#ifdef CONFIG_GACT_PROB
+ struct tc_gact_p *p_parm = NULL;
+#endif
+
+ if (nla == NULL)
+ return -EINVAL;
+
+ err = nla_parse_nested(tb, TCA_GACT_MAX, nla, gact_policy, NULL);
+ if (err < 0)
+ return err;
+
+ if (tb[TCA_GACT_PARMS] == NULL)
+ return -EINVAL;
+ parm = nla_data(tb[TCA_GACT_PARMS]);
+ index = parm->index;
+
+#ifndef CONFIG_GACT_PROB
+ if (tb[TCA_GACT_PROB] != NULL)
+ return -EOPNOTSUPP;
+#else
+ if (tb[TCA_GACT_PROB]) {
+ p_parm = nla_data(tb[TCA_GACT_PROB]);
+ if (p_parm->ptype >= MAX_RAND)
+ return -EINVAL;
+ }
+#endif
+
+ err = tcf_idr_check_alloc(tn, &index, a, bind);
+ if (!err) {
+ ret = tcf_idr_create(tn, index, est, a,
+ &act_gact_ops, bind, true);
+ if (ret) {
+ tcf_idr_cleanup(tn, index);
+ return ret;
+ }
+ ret = ACT_P_CREATED;
+ } else if (err > 0) {
+ if (bind)/* dont override defaults */
+ return 0;
+ if (!ovr) {
+ tcf_idr_release(*a, bind);
+ return -EEXIST;
+ }
+ } else {
+ return err;
+ }
+
+ gact = to_gact(*a);
+
+ spin_lock_bh(&gact->tcf_lock);
+ gact->tcf_action = parm->action;
+#ifdef CONFIG_GACT_PROB
+ if (p_parm) {
+ gact->tcfg_paction = p_parm->paction;
+ gact->tcfg_pval = max_t(u16, 1, p_parm->pval);
+ /* Make sure tcfg_pval is written before tcfg_ptype
+ * coupled with smp_rmb() in gact_net_rand() & gact_determ()
+ */
+ smp_wmb();
+ gact->tcfg_ptype = p_parm->ptype;
+ }
+#endif
+ spin_unlock_bh(&gact->tcf_lock);
+
+ if (ret == ACT_P_CREATED)
+ tcf_idr_insert(tn, *a);
+ return ret;
+}
+
+static int tcf_gact_act(struct sk_buff *skb, const struct tc_action *a,
+ struct tcf_result *res)
+{
+ struct tcf_gact *gact = to_gact(a);
+ int action = READ_ONCE(gact->tcf_action);
+
+#ifdef CONFIG_GACT_PROB
+ {
+ u32 ptype = READ_ONCE(gact->tcfg_ptype);
+
+ if (ptype)
+ action = gact_rand[ptype](gact);
+ }
+#endif
+ bstats_cpu_update(this_cpu_ptr(gact->common.cpu_bstats), skb);
+ if (action == TC_ACT_SHOT)
+ qstats_drop_inc(this_cpu_ptr(gact->common.cpu_qstats));
+
+ tcf_lastuse_update(&gact->tcf_tm);
+
+ return action;
+}
+
+static void tcf_gact_stats_update(struct tc_action *a, u64 bytes, u32 packets,
+ u64 lastuse)
+{
+ struct tcf_gact *gact = to_gact(a);
+ int action = READ_ONCE(gact->tcf_action);
+ struct tcf_t *tm = &gact->tcf_tm;
+
+ _bstats_cpu_update(this_cpu_ptr(gact->common.cpu_bstats), bytes,
+ packets);
+ if (action == TC_ACT_SHOT)
+ this_cpu_ptr(gact->common.cpu_qstats)->drops += packets;
+
+ tm->lastuse = max_t(u64, tm->lastuse, lastuse);
+}
+
+static int tcf_gact_dump(struct sk_buff *skb, struct tc_action *a,
+ int bind, int ref)
+{
+ unsigned char *b = skb_tail_pointer(skb);
+ struct tcf_gact *gact = to_gact(a);
+ struct tc_gact opt = {
+ .index = gact->tcf_index,
+ .refcnt = refcount_read(&gact->tcf_refcnt) - ref,
+ .bindcnt = atomic_read(&gact->tcf_bindcnt) - bind,
+ };
+ struct tcf_t t;
+
+ spin_lock_bh(&gact->tcf_lock);
+ opt.action = gact->tcf_action;
+ if (nla_put(skb, TCA_GACT_PARMS, sizeof(opt), &opt))
+ goto nla_put_failure;
+#ifdef CONFIG_GACT_PROB
+ if (gact->tcfg_ptype) {
+ struct tc_gact_p p_opt = {
+ .paction = gact->tcfg_paction,
+ .pval = gact->tcfg_pval,
+ .ptype = gact->tcfg_ptype,
+ };
+
+ if (nla_put(skb, TCA_GACT_PROB, sizeof(p_opt), &p_opt))
+ goto nla_put_failure;
+ }
+#endif
+ tcf_tm_dump(&t, &gact->tcf_tm);
+ if (nla_put_64bit(skb, TCA_GACT_TM, sizeof(t), &t, TCA_GACT_PAD))
+ goto nla_put_failure;
+ spin_unlock_bh(&gact->tcf_lock);
+
+ return skb->len;
+
+nla_put_failure:
+ spin_unlock_bh(&gact->tcf_lock);
+ nlmsg_trim(skb, b);
+ return -1;
+}
+
+static int tcf_gact_walker(struct net *net, struct sk_buff *skb,
+ struct netlink_callback *cb, int type,
+ const struct tc_action_ops *ops,
+ struct netlink_ext_ack *extack)
+{
+ struct tc_action_net *tn = net_generic(net, gact_net_id);
+
+ return tcf_generic_walker(tn, skb, cb, type, ops, extack);
+}
+
+static int tcf_gact_search(struct net *net, struct tc_action **a, u32 index,
+ struct netlink_ext_ack *extack)
+{
+ struct tc_action_net *tn = net_generic(net, gact_net_id);
+
+ return tcf_idr_search(tn, a, index);
+}
+
+static size_t tcf_gact_get_fill_size(const struct tc_action *act)
+{
+ size_t sz = nla_total_size(sizeof(struct tc_gact)); /* TCA_GACT_PARMS */
+
+#ifdef CONFIG_GACT_PROB
+ if (to_gact(act)->tcfg_ptype)
+ /* TCA_GACT_PROB */
+ sz += nla_total_size(sizeof(struct tc_gact_p));
+#endif
+
+ return sz;
+}
+
+static struct tc_action_ops act_gact_ops = {
+ .kind = "gact",
+ .type = TCA_ACT_GACT,
+ .owner = THIS_MODULE,
+ .act = tcf_gact_act,
+ .stats_update = tcf_gact_stats_update,
+ .dump = tcf_gact_dump,
+ .init = tcf_gact_init,
+ .walk = tcf_gact_walker,
+ .lookup = tcf_gact_search,
+ .get_fill_size = tcf_gact_get_fill_size,
+ .size = sizeof(struct tcf_gact),
+};
+
+static __net_init int gact_init_net(struct net *net)
+{
+ struct tc_action_net *tn = net_generic(net, gact_net_id);
+
+ return tc_action_net_init(net, tn, &act_gact_ops);
+}
+
+static void __net_exit gact_exit_net(struct list_head *net_list)
+{
+ tc_action_net_exit(net_list, gact_net_id);
+}
+
+static struct pernet_operations gact_net_ops = {
+ .init = gact_init_net,
+ .exit_batch = gact_exit_net,
+ .id = &gact_net_id,
+ .size = sizeof(struct tc_action_net),
+};
+
+MODULE_AUTHOR("Jamal Hadi Salim(2002-4)");
+MODULE_DESCRIPTION("Generic Classifier actions");
+MODULE_LICENSE("GPL");
+
+static int __init gact_init_module(void)
+{
+#ifdef CONFIG_GACT_PROB
+ pr_info("GACT probability on\n");
+#else
+ pr_info("GACT probability NOT on\n");
+#endif
+
+ return tcf_register_action(&act_gact_ops, &gact_net_ops);
+}
+
+static void __exit gact_cleanup_module(void)
+{
+ tcf_unregister_action(&act_gact_ops, &gact_net_ops);
+}
+
+module_init(gact_init_module);
+module_exit(gact_cleanup_module);