cregit-Linux how code gets into the kernel

Release 4.8 net/sched/act_skbedit.c

Directory: net/sched
 * Copyright (c) 2008, Intel Corporation.
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, see <>.
 * Author: Alexander Duyck <>

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>

#include <linux/tc_act/tc_skbedit.h>
#include <net/tc_act/tc_skbedit.h>

#define SKBEDIT_TAB_MASK     15

static int skbedit_net_id;

static struct tc_action_ops act_skbedit_ops;

static int tcf_skbedit(struct sk_buff *skb, const struct tc_action *a, struct tcf_result *res) { struct tcf_skbedit *d = to_skbedit(a); spin_lock(&d->tcf_lock); tcf_lastuse_update(&d->tcf_tm); bstats_update(&d->tcf_bstats, skb); if (d->flags & SKBEDIT_F_PRIORITY) skb->priority = d->priority; if (d->flags & SKBEDIT_F_QUEUE_MAPPING && skb->dev->real_num_tx_queues > d->queue_mapping) skb_set_queue_mapping(skb, d->queue_mapping); if (d->flags & SKBEDIT_F_MARK) skb->mark = d->mark; if (d->flags & SKBEDIT_F_PTYPE) skb->pkt_type = d->ptype; spin_unlock(&d->tcf_lock); return d->tcf_action; }


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jamal hadi salimjamal hadi salim3624.66%342.86%
eric dumazeteric dumazet53.42%228.57%
americo wangamerico wang32.05%114.29%

static const struct nla_policy skbedit_policy[TCA_SKBEDIT_MAX + 1] = { [TCA_SKBEDIT_PARMS] = { .len = sizeof(struct tc_skbedit) }, [TCA_SKBEDIT_PRIORITY] = { .len = sizeof(u32) }, [TCA_SKBEDIT_QUEUE_MAPPING] = { .len = sizeof(u16) }, [TCA_SKBEDIT_MARK] = { .len = sizeof(u32) }, [TCA_SKBEDIT_PTYPE] = { .len = sizeof(u16) }, };
static int tcf_skbedit_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, skbedit_net_id); struct nlattr *tb[TCA_SKBEDIT_MAX + 1]; struct tc_skbedit *parm; struct tcf_skbedit *d; u32 flags = 0, *priority = NULL, *mark = NULL; u16 *queue_mapping = NULL, *ptype = NULL; bool exists = false; int ret = 0, err; if (nla == NULL) return -EINVAL; err = nla_parse_nested(tb, TCA_SKBEDIT_MAX, nla, skbedit_policy); if (err < 0) return err; if (tb[TCA_SKBEDIT_PARMS] == NULL) return -EINVAL; if (tb[TCA_SKBEDIT_PRIORITY] != NULL) { flags |= SKBEDIT_F_PRIORITY; priority = nla_data(tb[TCA_SKBEDIT_PRIORITY]); } if (tb[TCA_SKBEDIT_QUEUE_MAPPING] != NULL) { flags |= SKBEDIT_F_QUEUE_MAPPING; queue_mapping = nla_data(tb[TCA_SKBEDIT_QUEUE_MAPPING]); } if (tb[TCA_SKBEDIT_PTYPE] != NULL) { ptype = nla_data(tb[TCA_SKBEDIT_PTYPE]); if (!skb_pkt_type_ok(*ptype)) return -EINVAL; flags |= SKBEDIT_F_PTYPE; } if (tb[TCA_SKBEDIT_MARK] != NULL) { flags |= SKBEDIT_F_MARK; mark = nla_data(tb[TCA_SKBEDIT_MARK]); } parm = nla_data(tb[TCA_SKBEDIT_PARMS]); exists = tcf_hash_check(tn, parm->index, a, bind); if (exists && bind) return 0; if (!flags) { tcf_hash_release(*a, bind); return -EINVAL; } if (!exists) { ret = tcf_hash_create(tn, parm->index, est, a, &act_skbedit_ops, bind, false); if (ret) return ret; d = to_skbedit(*a); ret = ACT_P_CREATED; } else { d = to_skbedit(*a); tcf_hash_release(*a, bind); if (!ovr) return -EEXIST; } spin_lock_bh(&d->tcf_lock); d->flags = flags; if (flags & SKBEDIT_F_PRIORITY) d->priority = *priority; if (flags & SKBEDIT_F_QUEUE_MAPPING) d->queue_mapping = *queue_mapping; if (flags & SKBEDIT_F_MARK) d->mark = *mark; if (flags & SKBEDIT_F_PTYPE) d->ptype = *ptype; d->tcf_action = parm->action; spin_unlock_bh(&d->tcf_lock); if (ret == ACT_P_CREATED) tcf_hash_insert(tn, *a); return ret; }


alexander duyckalexander duyck30862.99%18.33%
jamal hadi salimjamal hadi salim13627.81%433.33%
americo wangamerico wang387.77%541.67%
benjamin lahaisebenjamin lahaise51.02%18.33%
eric dumazeteric dumazet20.41%18.33%

static int tcf_skbedit_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref) { unsigned char *b = skb_tail_pointer(skb); struct tcf_skbedit *d = to_skbedit(a); struct tc_skbedit opt = { .index = d->tcf_index, .refcnt = d->tcf_refcnt - ref, .bindcnt = d->tcf_bindcnt - bind, .action = d->tcf_action, }; struct tcf_t t; if (nla_put(skb, TCA_SKBEDIT_PARMS, sizeof(opt), &opt)) goto nla_put_failure; if ((d->flags & SKBEDIT_F_PRIORITY) && nla_put_u32(skb, TCA_SKBEDIT_PRIORITY, d->priority)) goto nla_put_failure; if ((d->flags & SKBEDIT_F_QUEUE_MAPPING) && nla_put_u16(skb, TCA_SKBEDIT_QUEUE_MAPPING, d->queue_mapping)) goto nla_put_failure; if ((d->flags & SKBEDIT_F_MARK) && nla_put_u32(skb, TCA_SKBEDIT_MARK, d->mark)) goto nla_put_failure; if ((d->flags & SKBEDIT_F_PTYPE) && nla_put_u16(skb, TCA_SKBEDIT_PTYPE, d->ptype)) goto nla_put_failure; tcf_tm_dump(&t, &d->tcf_tm); if (nla_put_64bit(skb, TCA_SKBEDIT_TM, sizeof(t), &t, TCA_SKBEDIT_PAD)) goto nla_put_failure; return skb->len; nla_put_failure: nlmsg_trim(skb, b); return -1; }


alexander duyckalexander duyck15260.56%110.00%
jamal hadi salimjamal hadi salim4819.12%550.00%
david s. millerdavid s. miller3413.55%110.00%
eric dumazeteric dumazet114.38%110.00%
americo wangamerico wang31.20%110.00%
nicolas dichtelnicolas dichtel31.20%110.00%

static int tcf_skbedit_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, skbedit_net_id); return tcf_generic_walker(tn, skb, cb, type, ops); }


americo wangamerico wang56100.00%2100.00%

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


americo wangamerico wang42100.00%2100.00%

static struct tc_action_ops act_skbedit_ops = { .kind = "skbedit", .type = TCA_ACT_SKBEDIT, .owner = THIS_MODULE, .act = tcf_skbedit, .dump = tcf_skbedit_dump, .init = tcf_skbedit_init, .walk = tcf_skbedit_walker, .lookup = tcf_skbedit_search, .size = sizeof(struct tcf_skbedit), };
static __net_init int skbedit_init_net(struct net *net) { struct tc_action_net *tn = net_generic(net, skbedit_net_id); return tc_action_net_init(tn, &act_skbedit_ops, SKBEDIT_TAB_MASK); }


americo wangamerico wang35100.00%1100.00%

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


americo wangamerico wang29100.00%1100.00%

static struct pernet_operations skbedit_net_ops = { .init = skbedit_init_net, .exit = skbedit_exit_net, .id = &skbedit_net_id, .size = sizeof(struct tc_action_net), }; MODULE_AUTHOR("Alexander Duyck, <>"); MODULE_DESCRIPTION("SKB Editing"); MODULE_LICENSE("GPL");
static int __init skbedit_init_module(void) { return tcf_register_action(&act_skbedit_ops, &skbedit_net_ops); }


alexander duyckalexander duyck1684.21%133.33%
americo wangamerico wang315.79%266.67%

static void __exit skbedit_cleanup_module(void) { tcf_unregister_action(&act_skbedit_ops, &skbedit_net_ops); }


alexander duyckalexander duyck1583.33%150.00%
americo wangamerico wang316.67%150.00%

module_init(skbedit_init_module); module_exit(skbedit_cleanup_module);

Overall Contributors

alexander duyckalexander duyck74256.08%14.35%
americo wangamerico wang27220.56%626.09%
jamal hadi salimjamal hadi salim24818.75%834.78%
david s. millerdavid s. miller342.57%14.35%
eric dumazeteric dumazet181.36%417.39%
benjamin lahaisebenjamin lahaise50.38%14.35%
nicolas dichtelnicolas dichtel30.23%14.35%
jeff kirsherjeff kirsher10.08%14.35%
Directory: net/sched
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