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Release 4.11 net/sched/act_gact.c

Directory: net/sched
/*
 * 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>


#define GACT_TAB_MASK	15


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; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim2161.76%120.00%
David S. Miller720.59%120.00%
Eric Dumazet411.76%120.00%
Patrick McHardy12.94%120.00%
Aruna-Hewapathirane12.94%120.00%
Total34100.00%5100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim2045.45%120.00%
Eric Dumazet1636.36%240.00%
David S. Miller715.91%120.00%
Patrick McHardy12.27%120.00%
Total44100.00%5100.00%

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) { 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; 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); if (err < 0) return err; if (tb[TCA_GACT_PARMS] == NULL) return -EINVAL; parm = nla_data(tb[TCA_GACT_PARMS]); #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 if (!tcf_hash_check(tn, parm->index, a, bind)) { ret = tcf_hash_create(tn, parm->index, est, a, &act_gact_ops, bind, true); if (ret) return ret; ret = ACT_P_CREATED; } else { if (bind)/* dont override defaults */ return 0; tcf_hash_release(*a, bind); if (!ovr) return -EEXIST; } gact = to_gact(*a); ASSERT_RTNL(); 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 if (ret == ACT_P_CREATED) tcf_hash_insert(tn, *a); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim16446.59%211.11%
Patrick McHardy7320.74%633.33%
Hiroaki SHIMODA4613.07%15.56%
Américo Wang339.38%422.22%
David S. Miller164.55%15.56%
Eric Dumazet154.26%316.67%
Benjamin LaHaise51.42%15.56%
Total352100.00%18100.00%


static int tcf_gact(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; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim5850.00%19.09%
Eric Dumazet3530.17%327.27%
Patrick McHardy119.48%436.36%
David S. Miller86.90%19.09%
Américo Wang32.59%19.09%
Jussi Kivilinna10.86%19.09%
Total116100.00%11100.00%


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 = lastuse; }

Contributors

PersonTokensPropCommitsCommitProp
Amir Vadai8896.70%150.00%
Américo Wang33.30%150.00%
Total91100.00%2100.00%


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 = gact->tcf_refcnt - ref, .bindcnt = gact->tcf_bindcnt - bind, .action = gact->tcf_action, }; struct tcf_t t; 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; return skb->len; nla_put_failure: nlmsg_trim(skb, b); return -1; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim13864.19%321.43%
David S. Miller3918.14%214.29%
Eric Dumazet188.37%17.14%
Patrick McHardy104.65%428.57%
Arnaldo Carvalho de Melo41.86%214.29%
Nicolas Dichtel31.40%17.14%
Américo Wang31.40%17.14%
Total215100.00%14100.00%


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 tc_action_net *tn = net_generic(net, gact_net_id); return tcf_generic_walker(tn, skb, cb, type, ops); }

Contributors

PersonTokensPropCommitsCommitProp
Américo Wang56100.00%2100.00%
Total56100.00%2100.00%


static int tcf_gact_search(struct net *net, struct tc_action **a, u32 index) { struct tc_action_net *tn = net_generic(net, gact_net_id); return tcf_hash_search(tn, a, index); }

Contributors

PersonTokensPropCommitsCommitProp
Américo Wang42100.00%2100.00%
Total42100.00%2100.00%

static struct tc_action_ops act_gact_ops = { .kind = "gact", .type = TCA_ACT_GACT, .owner = THIS_MODULE, .act = tcf_gact, .stats_update = tcf_gact_stats_update, .dump = tcf_gact_dump, .init = tcf_gact_init, .walk = tcf_gact_walker, .lookup = tcf_gact_search, .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(tn, &act_gact_ops, GACT_TAB_MASK); }

Contributors

PersonTokensPropCommitsCommitProp
Américo Wang35100.00%1100.00%
Total35100.00%1100.00%


static void __net_exit gact_exit_net(struct net *net) { struct tc_action_net *tn = net_generic(net, gact_net_id); tc_action_net_exit(tn); }

Contributors

PersonTokensPropCommitsCommitProp
Américo Wang29100.00%1100.00%
Total29100.00%1100.00%

static struct pernet_operations gact_net_ops = { .init = gact_init_net, .exit = 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); }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim3186.11%125.00%
Américo Wang38.33%250.00%
Eric Dumazet25.56%125.00%
Total36100.00%4100.00%


static void __exit gact_cleanup_module(void) { tcf_unregister_action(&act_gact_ops, &gact_net_ops); }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim1583.33%150.00%
Américo Wang316.67%150.00%
Total18100.00%2100.00%

module_init(gact_init_module); module_exit(gact_cleanup_module);

Overall Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim56342.85%512.50%
Américo Wang27020.55%512.50%
Patrick McHardy15211.57%922.50%
Amir Vadai937.08%12.50%
Eric Dumazet906.85%820.00%
David S. Miller806.09%25.00%
Hiroaki SHIMODA463.50%12.50%
Arnaldo Carvalho de Melo70.53%25.00%
Benjamin LaHaise50.38%12.50%
Nicolas Dichtel30.23%12.50%
Jussi Kivilinna10.08%12.50%
Alexey Dobriyan10.08%12.50%
Jiri Pirko10.08%12.50%
Adrian Bunk10.08%12.50%
Aruna-Hewapathirane10.08%12.50%
Total1314100.00%40100.00%
Directory: net/sched
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