2 * net/sched/cls_matchll.c Match-all classifier
4 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/module.h>
16 #include <net/sch_generic.h>
17 #include <net/pkt_cls.h>
19 struct cls_mall_head
{
21 struct tcf_result res
;
27 static int mall_classify(struct sk_buff
*skb
, const struct tcf_proto
*tp
,
28 struct tcf_result
*res
)
30 struct cls_mall_head
*head
= rcu_dereference_bh(tp
->root
);
32 if (tc_skip_sw(head
->flags
))
36 return tcf_exts_exec(skb
, &head
->exts
, res
);
39 static int mall_init(struct tcf_proto
*tp
)
44 static void mall_destroy_rcu(struct rcu_head
*rcu
)
46 struct cls_mall_head
*head
= container_of(rcu
, struct cls_mall_head
,
49 tcf_exts_destroy(&head
->exts
);
53 static int mall_replace_hw_filter(struct tcf_proto
*tp
,
54 struct cls_mall_head
*head
,
57 struct net_device
*dev
= tp
->q
->dev_queue
->dev
;
58 struct tc_cls_matchall_offload cls_mall
= {};
61 tc_cls_common_offload_init(&cls_mall
.common
, tp
);
62 cls_mall
.command
= TC_CLSMATCHALL_REPLACE
;
63 cls_mall
.exts
= &head
->exts
;
64 cls_mall
.cookie
= cookie
;
66 err
= dev
->netdev_ops
->ndo_setup_tc(dev
, TC_SETUP_CLSMATCHALL
,
69 head
->flags
|= TCA_CLS_FLAGS_IN_HW
;
74 static void mall_destroy_hw_filter(struct tcf_proto
*tp
,
75 struct cls_mall_head
*head
,
78 struct net_device
*dev
= tp
->q
->dev_queue
->dev
;
79 struct tc_cls_matchall_offload cls_mall
= {};
81 tc_cls_common_offload_init(&cls_mall
.common
, tp
);
82 cls_mall
.command
= TC_CLSMATCHALL_DESTROY
;
83 cls_mall
.cookie
= cookie
;
85 dev
->netdev_ops
->ndo_setup_tc(dev
, TC_SETUP_CLSMATCHALL
, &cls_mall
);
88 static void mall_destroy(struct tcf_proto
*tp
)
90 struct cls_mall_head
*head
= rtnl_dereference(tp
->root
);
91 struct net_device
*dev
= tp
->q
->dev_queue
->dev
;
96 if (tc_should_offload(dev
, head
->flags
))
97 mall_destroy_hw_filter(tp
, head
, (unsigned long) head
);
99 call_rcu(&head
->rcu
, mall_destroy_rcu
);
102 static void *mall_get(struct tcf_proto
*tp
, u32 handle
)
107 static const struct nla_policy mall_policy
[TCA_MATCHALL_MAX
+ 1] = {
108 [TCA_MATCHALL_UNSPEC
] = { .type
= NLA_UNSPEC
},
109 [TCA_MATCHALL_CLASSID
] = { .type
= NLA_U32
},
112 static int mall_set_parms(struct net
*net
, struct tcf_proto
*tp
,
113 struct cls_mall_head
*head
,
114 unsigned long base
, struct nlattr
**tb
,
115 struct nlattr
*est
, bool ovr
)
119 err
= tcf_exts_validate(net
, tp
, tb
, est
, &head
->exts
, ovr
);
123 if (tb
[TCA_MATCHALL_CLASSID
]) {
124 head
->res
.classid
= nla_get_u32(tb
[TCA_MATCHALL_CLASSID
]);
125 tcf_bind_filter(tp
, &head
->res
, base
);
130 static int mall_change(struct net
*net
, struct sk_buff
*in_skb
,
131 struct tcf_proto
*tp
, unsigned long base
,
132 u32 handle
, struct nlattr
**tca
,
133 void **arg
, bool ovr
)
135 struct cls_mall_head
*head
= rtnl_dereference(tp
->root
);
136 struct net_device
*dev
= tp
->q
->dev_queue
->dev
;
137 struct nlattr
*tb
[TCA_MATCHALL_MAX
+ 1];
138 struct cls_mall_head
*new;
142 if (!tca
[TCA_OPTIONS
])
148 err
= nla_parse_nested(tb
, TCA_MATCHALL_MAX
, tca
[TCA_OPTIONS
],
153 if (tb
[TCA_MATCHALL_FLAGS
]) {
154 flags
= nla_get_u32(tb
[TCA_MATCHALL_FLAGS
]);
155 if (!tc_flags_valid(flags
))
159 new = kzalloc(sizeof(*new), GFP_KERNEL
);
163 err
= tcf_exts_init(&new->exts
, TCA_MATCHALL_ACT
, 0);
169 new->handle
= handle
;
172 err
= mall_set_parms(net
, tp
, new, base
, tb
, tca
[TCA_RATE
], ovr
);
176 if (tc_should_offload(dev
, flags
)) {
177 err
= mall_replace_hw_filter(tp
, new, (unsigned long) new);
179 if (tc_skip_sw(flags
))
180 goto err_replace_hw_filter
;
186 if (!tc_in_hw(new->flags
))
187 new->flags
|= TCA_CLS_FLAGS_NOT_IN_HW
;
190 rcu_assign_pointer(tp
->root
, new);
193 err_replace_hw_filter
:
195 tcf_exts_destroy(&new->exts
);
201 static int mall_delete(struct tcf_proto
*tp
, void *arg
, bool *last
)
206 static void mall_walk(struct tcf_proto
*tp
, struct tcf_walker
*arg
)
208 struct cls_mall_head
*head
= rtnl_dereference(tp
->root
);
210 if (arg
->count
< arg
->skip
)
212 if (arg
->fn(tp
, head
, arg
) < 0)
218 static int mall_dump(struct net
*net
, struct tcf_proto
*tp
, void *fh
,
219 struct sk_buff
*skb
, struct tcmsg
*t
)
221 struct cls_mall_head
*head
= fh
;
227 t
->tcm_handle
= head
->handle
;
229 nest
= nla_nest_start(skb
, TCA_OPTIONS
);
231 goto nla_put_failure
;
233 if (head
->res
.classid
&&
234 nla_put_u32(skb
, TCA_MATCHALL_CLASSID
, head
->res
.classid
))
235 goto nla_put_failure
;
237 if (head
->flags
&& nla_put_u32(skb
, TCA_MATCHALL_FLAGS
, head
->flags
))
238 goto nla_put_failure
;
240 if (tcf_exts_dump(skb
, &head
->exts
))
241 goto nla_put_failure
;
243 nla_nest_end(skb
, nest
);
245 if (tcf_exts_dump_stats(skb
, &head
->exts
) < 0)
246 goto nla_put_failure
;
251 nla_nest_cancel(skb
, nest
);
255 static void mall_bind_class(void *fh
, u32 classid
, unsigned long cl
)
257 struct cls_mall_head
*head
= fh
;
259 if (head
&& head
->res
.classid
== classid
)
260 head
->res
.class = cl
;
263 static struct tcf_proto_ops cls_mall_ops __read_mostly
= {
265 .classify
= mall_classify
,
267 .destroy
= mall_destroy
,
269 .change
= mall_change
,
270 .delete = mall_delete
,
273 .bind_class
= mall_bind_class
,
274 .owner
= THIS_MODULE
,
277 static int __init
cls_mall_init(void)
279 return register_tcf_proto_ops(&cls_mall_ops
);
282 static void __exit
cls_mall_exit(void)
284 unregister_tcf_proto_ops(&cls_mall_ops
);
287 module_init(cls_mall_init
);
288 module_exit(cls_mall_exit
);
290 MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
291 MODULE_DESCRIPTION("Match-all classifier");
292 MODULE_LICENSE("GPL v2");