Release 4.11 net/sched/cls_basic.c
/*
* net/sched/cls_basic.c Basic Packet Classifier.
*
* 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: Thomas Graf <tgraf@suug.ch>
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/rtnetlink.h>
#include <linux/skbuff.h>
#include <net/netlink.h>
#include <net/act_api.h>
#include <net/pkt_cls.h>
struct basic_head {
u32 hgenerator;
struct list_head flist;
struct rcu_head rcu;
};
struct basic_filter {
u32 handle;
struct tcf_exts exts;
struct tcf_ematch_tree ematches;
struct tcf_result res;
struct tcf_proto *tp;
struct list_head link;
struct rcu_head rcu;
};
static int basic_classify(struct sk_buff *skb, const struct tcf_proto *tp,
struct tcf_result *res)
{
int r;
struct basic_head *head = rcu_dereference_bh(tp->root);
struct basic_filter *f;
list_for_each_entry_rcu(f, &head->flist, link) {
if (!tcf_em_tree_match(skb, &f->ematches, NULL))
continue;
*res = f->res;
r = tcf_exts_exec(skb, &f->exts, res);
if (r < 0)
continue;
return r;
}
return -1;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 98 | 95.15% | 1 | 33.33% |
John Fastabend | 4 | 3.88% | 1 | 33.33% |
Eric Dumazet | 1 | 0.97% | 1 | 33.33% |
Total | 103 | 100.00% | 3 | 100.00% |
static unsigned long basic_get(struct tcf_proto *tp, u32 handle)
{
unsigned long l = 0UL;
struct basic_head *head = rtnl_dereference(tp->root);
struct basic_filter *f;
list_for_each_entry(f, &head->flist, link) {
if (f->handle == handle) {
l = (unsigned long) f;
break;
}
}
return l;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 62 | 88.57% | 1 | 33.33% |
Daniel Borkmann | 5 | 7.14% | 1 | 33.33% |
John Fastabend | 3 | 4.29% | 1 | 33.33% |
Total | 70 | 100.00% | 3 | 100.00% |
static int basic_init(struct tcf_proto *tp)
{
struct basic_head *head;
head = kzalloc(sizeof(*head), GFP_KERNEL);
if (head == NULL)
return -ENOBUFS;
INIT_LIST_HEAD(&head->flist);
rcu_assign_pointer(tp->root, head);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Patrick McHardy | 41 | 69.49% | 1 | 33.33% |
David S. Miller | 14 | 23.73% | 1 | 33.33% |
John Fastabend | 4 | 6.78% | 1 | 33.33% |
Total | 59 | 100.00% | 3 | 100.00% |
static void basic_delete_filter(struct rcu_head *head)
{
struct basic_filter *f = container_of(head, struct basic_filter, rcu);
tcf_exts_destroy(&f->exts);
tcf_em_tree_destroy(&f->ematches);
kfree(f);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 32 | 68.09% | 1 | 50.00% |
John Fastabend | 15 | 31.91% | 1 | 50.00% |
Total | 47 | 100.00% | 2 | 100.00% |
static bool basic_destroy(struct tcf_proto *tp, bool force)
{
struct basic_head *head = rtnl_dereference(tp->root);
struct basic_filter *f, *n;
if (!force && !list_empty(&head->flist))
return false;
list_for_each_entry_safe(f, n, &head->flist, link) {
list_del_rcu(&f->link);
tcf_unbind_filter(tp, &f->res);
call_rcu(&f->rcu, basic_delete_filter);
}
kfree_rcu(head, rcu);
return true;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 46 | 45.54% | 1 | 20.00% |
John Fastabend | 27 | 26.73% | 2 | 40.00% |
Cong Wang | 24 | 23.76% | 1 | 20.00% |
Patrick McHardy | 4 | 3.96% | 1 | 20.00% |
Total | 101 | 100.00% | 5 | 100.00% |
static int basic_delete(struct tcf_proto *tp, unsigned long arg)
{
struct basic_filter *f = (struct basic_filter *) arg;
list_del_rcu(&f->link);
tcf_unbind_filter(tp, &f->res);
call_rcu(&f->rcu, basic_delete_filter);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 39 | 67.24% | 1 | 25.00% |
John Fastabend | 16 | 27.59% | 2 | 50.00% |
Jiri Pirko | 3 | 5.17% | 1 | 25.00% |
Total | 58 | 100.00% | 4 | 100.00% |
static const struct nla_policy basic_policy[TCA_BASIC_MAX + 1] = {
[TCA_BASIC_CLASSID] = { .type = NLA_U32 },
[TCA_BASIC_EMATCHES] = { .type = NLA_NESTED },
};
static int basic_set_parms(struct net *net, struct tcf_proto *tp,
struct basic_filter *f, unsigned long base,
struct nlattr **tb,
struct nlattr *est, bool ovr)
{
int err;
struct tcf_exts e;
struct tcf_ematch_tree t;
err = tcf_exts_init(&e, TCA_BASIC_ACT, TCA_BASIC_POLICE);
if (err < 0)
return err;
err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
if (err < 0)
goto errout;
err = tcf_em_tree_validate(tp, tb[TCA_BASIC_EMATCHES], &t);
if (err < 0)
goto errout;
if (tb[TCA_BASIC_CLASSID]) {
f->res.classid = nla_get_u32(tb[TCA_BASIC_CLASSID]);
tcf_bind_filter(tp, &f->res, base);
}
tcf_exts_change(tp, &f->exts, &e);
tcf_em_tree_change(tp, &f->ematches, &t);
f->tp = tp;
return 0;
errout:
tcf_exts_destroy(&e);
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 158 | 77.83% | 1 | 12.50% |
Américo Wang | 24 | 11.82% | 2 | 25.00% |
Benjamin LaHaise | 7 | 3.45% | 1 | 12.50% |
John Fastabend | 6 | 2.96% | 1 | 12.50% |
Cong Wang | 5 | 2.46% | 1 | 12.50% |
Patrick McHardy | 3 | 1.48% | 2 | 25.00% |
Total | 203 | 100.00% | 8 | 100.00% |
static int basic_change(struct net *net, struct sk_buff *in_skb,
struct tcf_proto *tp, unsigned long base, u32 handle,
struct nlattr **tca, unsigned long *arg, bool ovr)
{
int err;
struct basic_head *head = rtnl_dereference(tp->root);
struct nlattr *tb[TCA_BASIC_MAX + 1];
struct basic_filter *fold = (struct basic_filter *) *arg;
struct basic_filter *fnew;
if (tca[TCA_OPTIONS] == NULL)
return -EINVAL;
err = nla_parse_nested(tb, TCA_BASIC_MAX, tca[TCA_OPTIONS],
basic_policy);
if (err < 0)
return err;
if (fold != NULL) {
if (handle && fold->handle != handle)
return -EINVAL;
}
fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
if (!fnew)
return -ENOBUFS;
err = tcf_exts_init(&fnew->exts, TCA_BASIC_ACT, TCA_BASIC_POLICE);
if (err < 0)
goto errout;
err = -EINVAL;
if (handle) {
fnew->handle = handle;
} else if (fold) {
fnew->handle = fold->handle;
} else {
unsigned int i = 0x80000000;
do {
if (++head->hgenerator == 0x7FFFFFFF)
head->hgenerator = 1;
} while (--i > 0 && basic_get(tp, head->hgenerator));
if (i <= 0) {
pr_err("Insufficient number of handles\n");
goto errout;
}
fnew->handle = head->hgenerator;
}
err = basic_set_parms(net, tp, fnew, base, tb, tca[TCA_RATE], ovr);
if (err < 0)
goto errout;
*arg = (unsigned long)fnew;
if (fold) {
list_replace_rcu(&fold->link, &fnew->link);
tcf_unbind_filter(tp, &fold->res);
call_rcu(&fold->rcu, basic_delete_filter);
} else {
list_add_rcu(&fnew->link, &head->flist);
}
return 0;
errout:
tcf_exts_destroy(&fnew->exts);
kfree(fnew);
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 251 | 61.82% | 1 | 6.25% |
John Fastabend | 86 | 21.18% | 2 | 12.50% |
Américo Wang | 30 | 7.39% | 3 | 18.75% |
Patrick McHardy | 14 | 3.45% | 3 | 18.75% |
Benjamin LaHaise | 7 | 1.72% | 1 | 6.25% |
Eric W. Biedermann | 5 | 1.23% | 1 | 6.25% |
Cong Wang | 5 | 1.23% | 1 | 6.25% |
Jiri Pirko | 5 | 1.23% | 1 | 6.25% |
Kim Nordlund | 1 | 0.25% | 1 | 6.25% |
Panagiotis Issaris | 1 | 0.25% | 1 | 6.25% |
Eric Dumazet | 1 | 0.25% | 1 | 6.25% |
Total | 406 | 100.00% | 16 | 100.00% |
static void basic_walk(struct tcf_proto *tp, struct tcf_walker *arg)
{
struct basic_head *head = rtnl_dereference(tp->root);
struct basic_filter *f;
list_for_each_entry(f, &head->flist, link) {
if (arg->count < arg->skip)
goto skip;
if (arg->fn(tp, (unsigned long) f, arg) < 0) {
arg->stop = 1;
break;
}
skip:
arg->count++;
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 88 | 96.70% | 1 | 50.00% |
John Fastabend | 3 | 3.30% | 1 | 50.00% |
Total | 91 | 100.00% | 2 | 100.00% |
static int basic_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
struct sk_buff *skb, struct tcmsg *t)
{
struct basic_filter *f = (struct basic_filter *) fh;
struct nlattr *nest;
if (f == NULL)
return skb->len;
t->tcm_handle = f->handle;
nest = nla_nest_start(skb, TCA_OPTIONS);
if (nest == NULL)
goto nla_put_failure;
if (f->res.classid &&
nla_put_u32(skb, TCA_BASIC_CLASSID, f->res.classid))
goto nla_put_failure;
if (tcf_exts_dump(skb, &f->exts) < 0 ||
tcf_em_tree_dump(skb, &f->ematches, TCA_BASIC_EMATCHES) < 0)
goto nla_put_failure;
nla_nest_end(skb, nest);
if (tcf_exts_dump_stats(skb, &f->exts) < 0)
goto nla_put_failure;
return skb->len;
nla_put_failure:
nla_nest_cancel(skb, nest);
return -1;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 119 | 65.75% | 2 | 25.00% |
Patrick McHardy | 20 | 11.05% | 2 | 25.00% |
Thomas Graf | 18 | 9.94% | 1 | 12.50% |
Stephen Hemminger | 17 | 9.39% | 1 | 12.50% |
Américo Wang | 5 | 2.76% | 1 | 12.50% |
Arnaldo Carvalho de Melo | 2 | 1.10% | 1 | 12.50% |
Total | 181 | 100.00% | 8 | 100.00% |
static struct tcf_proto_ops cls_basic_ops __read_mostly = {
.kind = "basic",
.classify = basic_classify,
.init = basic_init,
.destroy = basic_destroy,
.get = basic_get,
.change = basic_change,
.delete = basic_delete,
.walk = basic_walk,
.dump = basic_dump,
.owner = THIS_MODULE,
};
static int __init init_basic(void)
{
return register_tcf_proto_ops(&cls_basic_ops);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 16 | 100.00% | 1 | 100.00% |
Total | 16 | 100.00% | 1 | 100.00% |
static void __exit exit_basic(void)
{
unregister_tcf_proto_ops(&cls_basic_ops);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 15 | 100.00% | 1 | 100.00% |
Total | 15 | 100.00% | 1 | 100.00% |
module_init(init_basic)
module_exit(exit_basic)
MODULE_LICENSE("GPL");
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 1072 | 69.66% | 2 | 6.25% |
John Fastabend | 177 | 11.50% | 2 | 6.25% |
Patrick McHardy | 118 | 7.67% | 8 | 25.00% |
Américo Wang | 59 | 3.83% | 4 | 12.50% |
Cong Wang | 34 | 2.21% | 2 | 6.25% |
Thomas Graf | 18 | 1.17% | 1 | 3.12% |
Stephen Hemminger | 17 | 1.10% | 1 | 3.12% |
Benjamin LaHaise | 14 | 0.91% | 1 | 3.12% |
Jiri Pirko | 8 | 0.52% | 2 | 6.25% |
Eric W. Biedermann | 5 | 0.32% | 1 | 3.12% |
Daniel Borkmann | 5 | 0.32% | 1 | 3.12% |
Arnaldo Carvalho de Melo | 5 | 0.32% | 2 | 6.25% |
Tejun Heo | 3 | 0.19% | 1 | 3.12% |
Eric Dumazet | 2 | 0.13% | 2 | 6.25% |
Panagiotis Issaris | 1 | 0.06% | 1 | 3.12% |
Kim Nordlund | 1 | 0.06% | 1 | 3.12% |
Total | 1539 | 100.00% | 32 | 100.00% |
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