Release 4.14 net/sched/cls_fw.c
/*
* net/sched/cls_fw.c Classifier mapping ipchains' fwmark to traffic class.
*
* 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>
*
* Changes:
* Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_walk off by one
* Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_delete killed all the filter (and kernel).
* Alex <alex@pilotsoft.com> : 2004xxyy: Added Action extension
*
* JHS: We should remove the CONFIG_NET_CLS_IND from here
* eventually when the meta match extension is made available
*
*/
#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/skbuff.h>
#include <net/netlink.h>
#include <net/act_api.h>
#include <net/pkt_cls.h>
#define HTSIZE 256
struct fw_head {
u32 mask;
struct fw_filter __rcu *ht[HTSIZE];
struct rcu_head rcu;
};
struct fw_filter {
struct fw_filter __rcu *next;
u32 id;
struct tcf_result res;
#ifdef CONFIG_NET_CLS_IND
int ifindex;
#endif /* CONFIG_NET_CLS_IND */
struct tcf_exts exts;
struct tcf_proto *tp;
union {
struct work_struct work;
struct rcu_head rcu;
};
};
static u32 fw_hash(u32 handle)
{
handle ^= (handle >> 16);
handle ^= (handle >> 8);
return handle % HTSIZE;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Graf | 12 | 40.00% | 1 | 33.33% |
Linus Torvalds (pre-git) | 10 | 33.33% | 1 | 33.33% |
Eric Dumazet | 8 | 26.67% | 1 | 33.33% |
Total | 30 | 100.00% | 3 | 100.00% |
static int fw_classify(struct sk_buff *skb, const struct tcf_proto *tp,
struct tcf_result *res)
{
struct fw_head *head = rcu_dereference_bh(tp->root);
struct fw_filter *f;
int r;
u32 id = skb->mark;
if (head != NULL) {
id &= head->mask;
for (f = rcu_dereference_bh(head->ht[fw_hash(id)]); f;
f = rcu_dereference_bh(f->next)) {
if (f->id == id) {
*res = f->res;
#ifdef CONFIG_NET_CLS_IND
if (!tcf_match_indev(skb, f->ifindex))
continue;
#endif /* CONFIG_NET_CLS_IND */
r = tcf_exts_exec(skb, &f->exts, res);
if (r < 0)
continue;
return r;
}
}
} else {
/* Old method: classify the packet using its skb mark. */
if (id && (TC_H_MAJ(id) == 0 ||
!(TC_H_MAJ(id ^ tp->q->handle)))) {
res->classid = id;
res->class = 0;
return 0;
}
}
return -1;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 139 | 67.80% | 4 | 28.57% |
Thomas Graf | 25 | 12.20% | 3 | 21.43% |
Jamal Hadi Salim | 21 | 10.24% | 1 | 7.14% |
John Fastabend | 9 | 4.39% | 1 | 7.14% |
Patrick McHardy | 6 | 2.93% | 1 | 7.14% |
David S. Miller | 2 | 0.98% | 1 | 7.14% |
Américo Wang | 2 | 0.98% | 2 | 14.29% |
Eric Dumazet | 1 | 0.49% | 1 | 7.14% |
Total | 205 | 100.00% | 14 | 100.00% |
static void *fw_get(struct tcf_proto *tp, u32 handle)
{
struct fw_head *head = rtnl_dereference(tp->root);
struct fw_filter *f;
if (head == NULL)
return NULL;
f = rtnl_dereference(head->ht[fw_hash(handle)]);
for (; f; f = rtnl_dereference(f->next)) {
if (f->id == handle)
return f;
}
return NULL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 70 | 81.40% | 2 | 50.00% |
John Fastabend | 12 | 13.95% | 1 | 25.00% |
Américo Wang | 4 | 4.65% | 1 | 25.00% |
Total | 86 | 100.00% | 4 | 100.00% |
static int fw_init(struct tcf_proto *tp)
{
/* We don't allocate fw_head here, because in the old method
* we don't need it at all.
*/
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 14 | 93.33% | 1 | 50.00% |
Américo Wang | 1 | 6.67% | 1 | 50.00% |
Total | 15 | 100.00% | 2 | 100.00% |
static void __fw_delete_filter(struct fw_filter *f)
{
tcf_exts_destroy(&f->exts);
tcf_exts_put_net(&f->exts);
kfree(f);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Américo Wang | 32 | 100.00% | 1 | 100.00% |
Total | 32 | 100.00% | 1 | 100.00% |
static void fw_delete_filter_work(struct work_struct *work)
{
struct fw_filter *f = container_of(work, struct fw_filter, work);
rtnl_lock();
__fw_delete_filter(f);
rtnl_unlock();
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Américo Wang | 37 | 100.00% | 2 | 100.00% |
Total | 37 | 100.00% | 2 | 100.00% |
static void fw_delete_filter(struct rcu_head *head)
{
struct fw_filter *f = container_of(head, struct fw_filter, rcu);
INIT_WORK(&f->work, fw_delete_filter_work);
tcf_queue_work(&f->work);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Graf | 21 | 47.73% | 1 | 33.33% |
John Fastabend | 15 | 34.09% | 1 | 33.33% |
Américo Wang | 8 | 18.18% | 1 | 33.33% |
Total | 44 | 100.00% | 3 | 100.00% |
static void fw_destroy(struct tcf_proto *tp)
{
struct fw_head *head = rtnl_dereference(tp->root);
struct fw_filter *f;
int h;
if (head == NULL)
return;
for (h = 0; h < HTSIZE; h++) {
while ((f = rtnl_dereference(head->ht[h])) != NULL) {
RCU_INIT_POINTER(head->ht[h],
rtnl_dereference(f->next));
tcf_unbind_filter(tp, &f->res);
if (tcf_exts_get_net(&f->exts))
call_rcu(&f->rcu, fw_delete_filter);
else
__fw_delete_filter(f);
}
}
kfree_rcu(head, rcu);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 82 | 61.65% | 2 | 28.57% |
John Fastabend | 32 | 24.06% | 2 | 28.57% |
Américo Wang | 18 | 13.53% | 2 | 28.57% |
Thomas Graf | 1 | 0.75% | 1 | 14.29% |
Total | 133 | 100.00% | 7 | 100.00% |
static int fw_delete(struct tcf_proto *tp, void *arg, bool *last)
{
struct fw_head *head = rtnl_dereference(tp->root);
struct fw_filter *f = arg;
struct fw_filter __rcu **fp;
struct fw_filter *pfp;
int ret = -EINVAL;
int h;
if (head == NULL || f == NULL)
goto out;
fp = &head->ht[fw_hash(f->id)];
for (pfp = rtnl_dereference(*fp); pfp;
fp = &pfp->next, pfp = rtnl_dereference(*fp)) {
if (pfp == f) {
RCU_INIT_POINTER(*fp, rtnl_dereference(f->next));
tcf_unbind_filter(tp, &f->res);
tcf_exts_get_net(&f->exts);
call_rcu(&f->rcu, fw_delete_filter);
ret = 0;
break;
}
}
*last = true;
for (h = 0; h < HTSIZE; h++) {
if (rcu_access_pointer(head->ht[h])) {
*last = false;
break;
}
}
out:
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 92 | 42.79% | 3 | 33.33% |
Américo Wang | 68 | 31.63% | 3 | 33.33% |
John Fastabend | 50 | 23.26% | 2 | 22.22% |
Arnaldo Carvalho de Melo | 5 | 2.33% | 1 | 11.11% |
Total | 215 | 100.00% | 9 | 100.00% |
static const struct nla_policy fw_policy[TCA_FW_MAX + 1] = {
[TCA_FW_CLASSID] = { .type = NLA_U32 },
[TCA_FW_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ },
[TCA_FW_MASK] = { .type = NLA_U32 },
};
static int fw_set_parms(struct net *net, struct tcf_proto *tp,
struct fw_filter *f, struct nlattr **tb,
struct nlattr **tca, unsigned long base, bool ovr)
{
struct fw_head *head = rtnl_dereference(tp->root);
u32 mask;
int err;
err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &f->exts, ovr);
if (err < 0)
return err;
if (tb[TCA_FW_CLASSID]) {
f->res.classid = nla_get_u32(tb[TCA_FW_CLASSID]);
tcf_bind_filter(tp, &f->res, base);
}
#ifdef CONFIG_NET_CLS_IND
if (tb[TCA_FW_INDEV]) {
int ret;
ret = tcf_change_indev(net, tb[TCA_FW_INDEV]);
if (ret < 0)
return ret;
f->ifindex = ret;
}
#endif /* CONFIG_NET_CLS_IND */
err = -EINVAL;
if (tb[TCA_FW_MASK]) {
mask = nla_get_u32(tb[TCA_FW_MASK]);
if (mask != head->mask)
return err;
} else if (head->mask != 0xFFFFFFFF)
return err;
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 64 | 29.09% | 2 | 11.11% |
Patrick McHardy | 50 | 22.73% | 3 | 16.67% |
Thomas Graf | 49 | 22.27% | 3 | 16.67% |
Américo Wang | 14 | 6.36% | 2 | 11.11% |
Jiri Pirko | 14 | 6.36% | 2 | 11.11% |
Jamal Hadi Salim | 8 | 3.64% | 1 | 5.56% |
Benjamin LaHaise | 7 | 3.18% | 1 | 5.56% |
Wei Yongjun | 6 | 2.73% | 2 | 11.11% |
Cong Wang | 5 | 2.27% | 1 | 5.56% |
John Fastabend | 3 | 1.36% | 1 | 5.56% |
Total | 220 | 100.00% | 18 | 100.00% |
static int fw_change(struct net *net, struct sk_buff *in_skb,
struct tcf_proto *tp, unsigned long base,
u32 handle, struct nlattr **tca, void **arg,
bool ovr)
{
struct fw_head *head = rtnl_dereference(tp->root);
struct fw_filter *f = *arg;
struct nlattr *opt = tca[TCA_OPTIONS];
struct nlattr *tb[TCA_FW_MAX + 1];
int err;
if (!opt)
return handle ? -EINVAL : 0; /* Succeed if it is old method. */
err = nla_parse_nested(tb, TCA_FW_MAX, opt, fw_policy, NULL);
if (err < 0)
return err;
if (f) {
struct fw_filter *pfp, *fnew;
struct fw_filter __rcu **fp;
if (f->id != handle && handle)
return -EINVAL;
fnew = kzalloc(sizeof(struct fw_filter), GFP_KERNEL);
if (!fnew)
return -ENOBUFS;
fnew->id = f->id;
fnew->res = f->res;
#ifdef CONFIG_NET_CLS_IND
fnew->ifindex = f->ifindex;
#endif /* CONFIG_NET_CLS_IND */
fnew->tp = f->tp;
err = tcf_exts_init(&fnew->exts, TCA_FW_ACT, TCA_FW_POLICE);
if (err < 0) {
kfree(fnew);
return err;
}
err = fw_set_parms(net, tp, fnew, tb, tca, base, ovr);
if (err < 0) {
tcf_exts_destroy(&fnew->exts);
kfree(fnew);
return err;
}
fp = &head->ht[fw_hash(fnew->id)];
for (pfp = rtnl_dereference(*fp); pfp;
fp = &pfp->next, pfp = rtnl_dereference(*fp))
if (pfp == f)
break;
RCU_INIT_POINTER(fnew->next, rtnl_dereference(pfp->next));
rcu_assign_pointer(*fp, fnew);
tcf_unbind_filter(tp, &f->res);
tcf_exts_get_net(&f->exts);
call_rcu(&f->rcu, fw_delete_filter);
*arg = fnew;
return err;
}
if (!handle)
return -EINVAL;
if (!head) {
u32 mask = 0xFFFFFFFF;
if (tb[TCA_FW_MASK])
mask = nla_get_u32(tb[TCA_FW_MASK]);
head = kzalloc(sizeof(*head), GFP_KERNEL);
if (!head)
return -ENOBUFS;
head->mask = mask;
rcu_assign_pointer(tp->root, head);
}
f = kzalloc(sizeof(struct fw_filter), GFP_KERNEL);
if (f == NULL)
return -ENOBUFS;
err = tcf_exts_init(&f->exts, TCA_FW_ACT, TCA_FW_POLICE);
if (err < 0)
goto errout;
f->id = handle;
f->tp = tp;
err = fw_set_parms(net, tp, f, tb, tca, base, ovr);
if (err < 0)
goto errout;
RCU_INIT_POINTER(f->next, head->ht[fw_hash(handle)]);
rcu_assign_pointer(head->ht[fw_hash(handle)], f);
*arg = f;
return 0;
errout:
tcf_exts_destroy(&f->exts);
kfree(f);
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
John Fastabend | 219 | 35.49% | 3 | 12.00% |
Thomas Graf | 117 | 18.96% | 1 | 4.00% |
Américo Wang | 105 | 17.02% | 7 | 28.00% |
Linus Torvalds (pre-git) | 76 | 12.32% | 2 | 8.00% |
Jamal Hadi Salim | 38 | 6.16% | 1 | 4.00% |
Patrick McHardy | 36 | 5.83% | 5 | 20.00% |
Benjamin LaHaise | 9 | 1.46% | 1 | 4.00% |
Cong Wang | 7 | 1.13% | 1 | 4.00% |
Eric W. Biedermann | 5 | 0.81% | 1 | 4.00% |
Johannes Berg | 2 | 0.32% | 1 | 4.00% |
Jiri Pirko | 2 | 0.32% | 1 | 4.00% |
Panagiotis Issaris | 1 | 0.16% | 1 | 4.00% |
Total | 617 | 100.00% | 25 | 100.00% |
static void fw_walk(struct tcf_proto *tp, struct tcf_walker *arg)
{
struct fw_head *head = rtnl_dereference(tp->root);
int h;
if (head == NULL)
arg->stop = 1;
if (arg->stop)
return;
for (h = 0; h < HTSIZE; h++) {
struct fw_filter *f;
for (f = rtnl_dereference(head->ht[h]); f;
f = rtnl_dereference(f->next)) {
if (arg->count < arg->skip) {
arg->count++;
continue;
}
if (arg->fn(tp, f, arg) < 0) {
arg->stop = 1;
return;
}
arg->count++;
}
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 133 | 92.36% | 2 | 40.00% |
John Fastabend | 9 | 6.25% | 1 | 20.00% |
Thomas Graf | 2 | 1.39% | 2 | 40.00% |
Total | 144 | 100.00% | 5 | 100.00% |
static int fw_dump(struct net *net, struct tcf_proto *tp, void *fh,
struct sk_buff *skb, struct tcmsg *t)
{
struct fw_head *head = rtnl_dereference(tp->root);
struct fw_filter *f = fh;
struct nlattr *nest;
if (f == NULL)
return skb->len;
t->tcm_handle = f->id;
if (!f->res.classid && !tcf_exts_has_actions(&f->exts))
return skb->len;
nest = nla_nest_start(skb, TCA_OPTIONS);
if (nest == NULL)
goto nla_put_failure;
if (f->res.classid &&
nla_put_u32(skb, TCA_FW_CLASSID, f->res.classid))
goto nla_put_failure;
#ifdef CONFIG_NET_CLS_IND
if (f->ifindex) {
struct net_device *dev;
dev = __dev_get_by_index(net, f->ifindex);
if (dev && nla_put_string(skb, TCA_FW_INDEV, dev->name))
goto nla_put_failure;
}
#endif /* CONFIG_NET_CLS_IND */
if (head->mask != 0xFFFFFFFF &&
nla_put_u32(skb, TCA_FW_MASK, head->mask))
goto nla_put_failure;
if (tcf_exts_dump(skb, &f->exts) < 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 |
Linus Torvalds (pre-git) | 131 | 49.06% | 3 | 16.67% |
Patrick McHardy | 44 | 16.48% | 3 | 16.67% |
Américo Wang | 30 | 11.24% | 3 | 16.67% |
Jamal Hadi Salim | 23 | 8.61% | 1 | 5.56% |
David S. Miller | 18 | 6.74% | 1 | 5.56% |
Thomas Graf | 13 | 4.87% | 3 | 16.67% |
John Fastabend | 3 | 1.12% | 1 | 5.56% |
Jiri Pirko | 3 | 1.12% | 2 | 11.11% |
Arnaldo Carvalho de Melo | 2 | 0.75% | 1 | 5.56% |
Total | 267 | 100.00% | 18 | 100.00% |
static void fw_bind_class(void *fh, u32 classid, unsigned long cl)
{
struct fw_filter *f = fh;
if (f && f->res.classid == classid)
f->res.class = cl;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Américo Wang | 44 | 100.00% | 1 | 100.00% |
Total | 44 | 100.00% | 1 | 100.00% |
static struct tcf_proto_ops cls_fw_ops __read_mostly = {
.kind = "fw",
.classify = fw_classify,
.init = fw_init,
.destroy = fw_destroy,
.get = fw_get,
.change = fw_change,
.delete = fw_delete,
.walk = fw_walk,
.dump = fw_dump,
.bind_class = fw_bind_class,
.owner = THIS_MODULE,
};
static int __init init_fw(void)
{
return register_tcf_proto_ops(&cls_fw_ops);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 13 | 81.25% | 1 | 50.00% |
Al Viro | 3 | 18.75% | 1 | 50.00% |
Total | 16 | 100.00% | 2 | 100.00% |
static void __exit exit_fw(void)
{
unregister_tcf_proto_ops(&cls_fw_ops);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 12 | 80.00% | 1 | 50.00% |
Al Viro | 3 | 20.00% | 1 | 50.00% |
Total | 15 | 100.00% | 2 | 100.00% |
module_init(init_fw)
module_exit(exit_fw)
MODULE_LICENSE("GPL");
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 914 | 38.88% | 6 | 9.52% |
Américo Wang | 378 | 16.08% | 12 | 19.05% |
John Fastabend | 367 | 15.61% | 3 | 4.76% |
Thomas Graf | 251 | 10.68% | 11 | 17.46% |
Patrick McHardy | 189 | 8.04% | 9 | 14.29% |
Jamal Hadi Salim | 95 | 4.04% | 1 | 1.59% |
David S. Miller | 53 | 2.25% | 3 | 4.76% |
Jiri Pirko | 19 | 0.81% | 4 | 6.35% |
Benjamin LaHaise | 16 | 0.68% | 1 | 1.59% |
Al Viro | 15 | 0.64% | 1 | 1.59% |
Eric Dumazet | 13 | 0.55% | 2 | 3.17% |
Cong Wang | 12 | 0.51% | 1 | 1.59% |
Arnaldo Carvalho de Melo | 7 | 0.30% | 2 | 3.17% |
Wei Yongjun | 6 | 0.26% | 2 | 3.17% |
Eric W. Biedermann | 5 | 0.21% | 1 | 1.59% |
Linus Torvalds | 5 | 0.21% | 1 | 1.59% |
Tejun Heo | 3 | 0.13% | 1 | 1.59% |
Johannes Berg | 2 | 0.09% | 1 | 1.59% |
Panagiotis Issaris | 1 | 0.04% | 1 | 1.59% |
Total | 2351 | 100.00% | 63 | 100.00% |
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