302 lines
6.7 KiB
C
302 lines
6.7 KiB
C
/*
|
|
* net/sched/cls_matchll.c Match-all classifier
|
|
*
|
|
* Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <net/sch_generic.h>
|
|
#include <net/pkt_cls.h>
|
|
|
|
struct cls_mall_head {
|
|
struct tcf_exts exts;
|
|
struct tcf_result res;
|
|
u32 handle;
|
|
u32 flags;
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
static int mall_classify(struct sk_buff *skb, const struct tcf_proto *tp,
|
|
struct tcf_result *res)
|
|
{
|
|
struct cls_mall_head *head = rcu_dereference_bh(tp->root);
|
|
|
|
if (tc_skip_sw(head->flags))
|
|
return -1;
|
|
|
|
return tcf_exts_exec(skb, &head->exts, res);
|
|
}
|
|
|
|
static int mall_init(struct tcf_proto *tp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void mall_destroy_rcu(struct rcu_head *rcu)
|
|
{
|
|
struct cls_mall_head *head = container_of(rcu, struct cls_mall_head,
|
|
rcu);
|
|
|
|
tcf_exts_destroy(&head->exts);
|
|
kfree(head);
|
|
}
|
|
|
|
static int mall_replace_hw_filter(struct tcf_proto *tp,
|
|
struct cls_mall_head *head,
|
|
unsigned long cookie)
|
|
{
|
|
struct net_device *dev = tp->q->dev_queue->dev;
|
|
struct tc_to_netdev offload;
|
|
struct tc_cls_matchall_offload mall_offload = {0};
|
|
int err;
|
|
|
|
offload.type = TC_SETUP_MATCHALL;
|
|
offload.cls_mall = &mall_offload;
|
|
offload.cls_mall->command = TC_CLSMATCHALL_REPLACE;
|
|
offload.cls_mall->exts = &head->exts;
|
|
offload.cls_mall->cookie = cookie;
|
|
|
|
err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol,
|
|
&offload);
|
|
if (!err)
|
|
head->flags |= TCA_CLS_FLAGS_IN_HW;
|
|
|
|
return err;
|
|
}
|
|
|
|
static void mall_destroy_hw_filter(struct tcf_proto *tp,
|
|
struct cls_mall_head *head,
|
|
unsigned long cookie)
|
|
{
|
|
struct net_device *dev = tp->q->dev_queue->dev;
|
|
struct tc_to_netdev offload;
|
|
struct tc_cls_matchall_offload mall_offload = {0};
|
|
|
|
offload.type = TC_SETUP_MATCHALL;
|
|
offload.cls_mall = &mall_offload;
|
|
offload.cls_mall->command = TC_CLSMATCHALL_DESTROY;
|
|
offload.cls_mall->exts = NULL;
|
|
offload.cls_mall->cookie = cookie;
|
|
|
|
dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol,
|
|
&offload);
|
|
}
|
|
|
|
static bool mall_destroy(struct tcf_proto *tp, bool force)
|
|
{
|
|
struct cls_mall_head *head = rtnl_dereference(tp->root);
|
|
struct net_device *dev = tp->q->dev_queue->dev;
|
|
|
|
if (!head)
|
|
return true;
|
|
|
|
if (tc_should_offload(dev, tp, head->flags))
|
|
mall_destroy_hw_filter(tp, head, (unsigned long) head);
|
|
|
|
call_rcu(&head->rcu, mall_destroy_rcu);
|
|
return true;
|
|
}
|
|
|
|
static unsigned long mall_get(struct tcf_proto *tp, u32 handle)
|
|
{
|
|
return 0UL;
|
|
}
|
|
|
|
static const struct nla_policy mall_policy[TCA_MATCHALL_MAX + 1] = {
|
|
[TCA_MATCHALL_UNSPEC] = { .type = NLA_UNSPEC },
|
|
[TCA_MATCHALL_CLASSID] = { .type = NLA_U32 },
|
|
};
|
|
|
|
static int mall_set_parms(struct net *net, struct tcf_proto *tp,
|
|
struct cls_mall_head *head,
|
|
unsigned long base, struct nlattr **tb,
|
|
struct nlattr *est, bool ovr)
|
|
{
|
|
struct tcf_exts e;
|
|
int err;
|
|
|
|
err = tcf_exts_init(&e, TCA_MATCHALL_ACT, 0);
|
|
if (err)
|
|
return err;
|
|
err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
|
|
if (err < 0)
|
|
goto errout;
|
|
|
|
if (tb[TCA_MATCHALL_CLASSID]) {
|
|
head->res.classid = nla_get_u32(tb[TCA_MATCHALL_CLASSID]);
|
|
tcf_bind_filter(tp, &head->res, base);
|
|
}
|
|
|
|
tcf_exts_change(tp, &head->exts, &e);
|
|
|
|
return 0;
|
|
errout:
|
|
tcf_exts_destroy(&e);
|
|
return err;
|
|
}
|
|
|
|
static int mall_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)
|
|
{
|
|
struct cls_mall_head *head = rtnl_dereference(tp->root);
|
|
struct net_device *dev = tp->q->dev_queue->dev;
|
|
struct nlattr *tb[TCA_MATCHALL_MAX + 1];
|
|
struct cls_mall_head *new;
|
|
u32 flags = 0;
|
|
int err;
|
|
|
|
if (!tca[TCA_OPTIONS])
|
|
return -EINVAL;
|
|
|
|
if (head)
|
|
return -EEXIST;
|
|
|
|
err = nla_parse_nested(tb, TCA_MATCHALL_MAX,
|
|
tca[TCA_OPTIONS], mall_policy);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (tb[TCA_MATCHALL_FLAGS]) {
|
|
flags = nla_get_u32(tb[TCA_MATCHALL_FLAGS]);
|
|
if (!tc_flags_valid(flags))
|
|
return -EINVAL;
|
|
}
|
|
|
|
new = kzalloc(sizeof(*new), GFP_KERNEL);
|
|
if (!new)
|
|
return -ENOBUFS;
|
|
|
|
err = tcf_exts_init(&new->exts, TCA_MATCHALL_ACT, 0);
|
|
if (err)
|
|
goto err_exts_init;
|
|
|
|
if (!handle)
|
|
handle = 1;
|
|
new->handle = handle;
|
|
new->flags = flags;
|
|
|
|
err = mall_set_parms(net, tp, new, base, tb, tca[TCA_RATE], ovr);
|
|
if (err)
|
|
goto err_set_parms;
|
|
|
|
if (tc_should_offload(dev, tp, flags)) {
|
|
err = mall_replace_hw_filter(tp, new, (unsigned long) new);
|
|
if (err) {
|
|
if (tc_skip_sw(flags))
|
|
goto err_replace_hw_filter;
|
|
else
|
|
err = 0;
|
|
}
|
|
}
|
|
|
|
if (!tc_in_hw(new->flags))
|
|
new->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
|
|
|
|
*arg = (unsigned long) head;
|
|
rcu_assign_pointer(tp->root, new);
|
|
if (head)
|
|
call_rcu(&head->rcu, mall_destroy_rcu);
|
|
return 0;
|
|
|
|
err_replace_hw_filter:
|
|
err_set_parms:
|
|
tcf_exts_destroy(&new->exts);
|
|
err_exts_init:
|
|
kfree(new);
|
|
return err;
|
|
}
|
|
|
|
static int mall_delete(struct tcf_proto *tp, unsigned long arg)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static void mall_walk(struct tcf_proto *tp, struct tcf_walker *arg)
|
|
{
|
|
struct cls_mall_head *head = rtnl_dereference(tp->root);
|
|
|
|
if (arg->count < arg->skip)
|
|
goto skip;
|
|
if (arg->fn(tp, (unsigned long) head, arg) < 0)
|
|
arg->stop = 1;
|
|
skip:
|
|
arg->count++;
|
|
}
|
|
|
|
static int mall_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
|
|
struct sk_buff *skb, struct tcmsg *t)
|
|
{
|
|
struct cls_mall_head *head = (struct cls_mall_head *) fh;
|
|
struct nlattr *nest;
|
|
|
|
if (!head)
|
|
return skb->len;
|
|
|
|
t->tcm_handle = head->handle;
|
|
|
|
nest = nla_nest_start(skb, TCA_OPTIONS);
|
|
if (!nest)
|
|
goto nla_put_failure;
|
|
|
|
if (head->res.classid &&
|
|
nla_put_u32(skb, TCA_MATCHALL_CLASSID, head->res.classid))
|
|
goto nla_put_failure;
|
|
|
|
if (head->flags && nla_put_u32(skb, TCA_MATCHALL_FLAGS, head->flags))
|
|
goto nla_put_failure;
|
|
|
|
if (tcf_exts_dump(skb, &head->exts))
|
|
goto nla_put_failure;
|
|
|
|
nla_nest_end(skb, nest);
|
|
|
|
if (tcf_exts_dump_stats(skb, &head->exts) < 0)
|
|
goto nla_put_failure;
|
|
|
|
return skb->len;
|
|
|
|
nla_put_failure:
|
|
nla_nest_cancel(skb, nest);
|
|
return -1;
|
|
}
|
|
|
|
static struct tcf_proto_ops cls_mall_ops __read_mostly = {
|
|
.kind = "matchall",
|
|
.classify = mall_classify,
|
|
.init = mall_init,
|
|
.destroy = mall_destroy,
|
|
.get = mall_get,
|
|
.change = mall_change,
|
|
.delete = mall_delete,
|
|
.walk = mall_walk,
|
|
.dump = mall_dump,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static int __init cls_mall_init(void)
|
|
{
|
|
return register_tcf_proto_ops(&cls_mall_ops);
|
|
}
|
|
|
|
static void __exit cls_mall_exit(void)
|
|
{
|
|
unregister_tcf_proto_ops(&cls_mall_ops);
|
|
}
|
|
|
|
module_init(cls_mall_init);
|
|
module_exit(cls_mall_exit);
|
|
|
|
MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
|
|
MODULE_DESCRIPTION("Match-all classifier");
|
|
MODULE_LICENSE("GPL v2");
|