2008-09-12 23:30:20 +00:00
|
|
|
/*
|
|
|
|
* 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, write to the Free Software Foundation, Inc., 59 Temple
|
|
|
|
* Place - Suite 330, Boston, MA 02111-1307 USA.
|
|
|
|
*
|
|
|
|
* Author: Alexander Duyck <alexander.h.duyck@intel.com>
|
|
|
|
*/
|
|
|
|
|
|
|
|
#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 struct tcf_common *tcf_skbedit_ht[SKBEDIT_TAB_MASK + 1];
|
|
|
|
static u32 skbedit_idx_gen;
|
|
|
|
static DEFINE_RWLOCK(skbedit_lock);
|
|
|
|
|
|
|
|
static struct tcf_hashinfo skbedit_hash_info = {
|
|
|
|
.htab = tcf_skbedit_ht,
|
|
|
|
.hmask = SKBEDIT_TAB_MASK,
|
|
|
|
.lock = &skbedit_lock,
|
|
|
|
};
|
|
|
|
|
2011-07-05 23:25:42 +00:00
|
|
|
static int tcf_skbedit(struct sk_buff *skb, const struct tc_action *a,
|
2008-09-12 23:30:20 +00:00
|
|
|
struct tcf_result *res)
|
|
|
|
{
|
|
|
|
struct tcf_skbedit *d = a->priv;
|
|
|
|
|
|
|
|
spin_lock(&d->tcf_lock);
|
|
|
|
d->tcf_tm.lastuse = jiffies;
|
2011-01-09 08:30:54 +00:00
|
|
|
bstats_update(&d->tcf_bstats, skb);
|
2008-09-12 23:30:20 +00:00
|
|
|
|
|
|
|
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);
|
2009-10-15 03:09:18 +00:00
|
|
|
if (d->flags & SKBEDIT_F_MARK)
|
|
|
|
skb->mark = d->mark;
|
2008-09-12 23:30:20 +00:00
|
|
|
|
|
|
|
spin_unlock(&d->tcf_lock);
|
|
|
|
return d->tcf_action;
|
|
|
|
}
|
|
|
|
|
|
|
|
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) },
|
2009-10-15 03:09:18 +00:00
|
|
|
[TCA_SKBEDIT_MARK] = { .len = sizeof(u32) },
|
2008-09-12 23:30:20 +00:00
|
|
|
};
|
|
|
|
|
2013-01-14 05:15:39 +00:00
|
|
|
static int tcf_skbedit_init(struct net *net, struct nlattr *nla,
|
|
|
|
struct nlattr *est, struct tc_action *a,
|
|
|
|
int ovr, int bind)
|
2008-09-12 23:30:20 +00:00
|
|
|
{
|
|
|
|
struct nlattr *tb[TCA_SKBEDIT_MAX + 1];
|
|
|
|
struct tc_skbedit *parm;
|
|
|
|
struct tcf_skbedit *d;
|
|
|
|
struct tcf_common *pc;
|
2009-10-15 03:09:18 +00:00
|
|
|
u32 flags = 0, *priority = NULL, *mark = NULL;
|
2008-09-12 23:30:20 +00:00
|
|
|
u16 *queue_mapping = NULL;
|
|
|
|
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]);
|
|
|
|
}
|
2009-10-15 03:09:18 +00:00
|
|
|
|
|
|
|
if (tb[TCA_SKBEDIT_MARK] != NULL) {
|
|
|
|
flags |= SKBEDIT_F_MARK;
|
|
|
|
mark = nla_data(tb[TCA_SKBEDIT_MARK]);
|
|
|
|
}
|
|
|
|
|
2008-09-12 23:30:20 +00:00
|
|
|
if (!flags)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
parm = nla_data(tb[TCA_SKBEDIT_PARMS]);
|
|
|
|
|
|
|
|
pc = tcf_hash_check(parm->index, a, bind, &skbedit_hash_info);
|
|
|
|
if (!pc) {
|
|
|
|
pc = tcf_hash_create(parm->index, est, a, sizeof(*d), bind,
|
|
|
|
&skbedit_idx_gen, &skbedit_hash_info);
|
2008-11-26 05:12:32 +00:00
|
|
|
if (IS_ERR(pc))
|
2011-01-19 19:26:56 +00:00
|
|
|
return PTR_ERR(pc);
|
2008-09-12 23:30:20 +00:00
|
|
|
|
|
|
|
d = to_skbedit(pc);
|
|
|
|
ret = ACT_P_CREATED;
|
|
|
|
} else {
|
|
|
|
d = to_skbedit(pc);
|
|
|
|
if (!ovr) {
|
|
|
|
tcf_hash_release(pc, bind, &skbedit_hash_info);
|
|
|
|
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;
|
2009-10-15 03:09:18 +00:00
|
|
|
if (flags & SKBEDIT_F_MARK)
|
|
|
|
d->mark = *mark;
|
|
|
|
|
2008-09-12 23:30:20 +00:00
|
|
|
d->tcf_action = parm->action;
|
|
|
|
|
|
|
|
spin_unlock_bh(&d->tcf_lock);
|
|
|
|
|
|
|
|
if (ret == ACT_P_CREATED)
|
|
|
|
tcf_hash_insert(pc, &skbedit_hash_info);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2011-01-19 19:26:56 +00:00
|
|
|
static int tcf_skbedit_cleanup(struct tc_action *a, int bind)
|
2008-09-12 23:30:20 +00:00
|
|
|
{
|
|
|
|
struct tcf_skbedit *d = a->priv;
|
|
|
|
|
|
|
|
if (d)
|
|
|
|
return tcf_hash_release(&d->common, bind, &skbedit_hash_info);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-01-19 19:26:56 +00:00
|
|
|
static int tcf_skbedit_dump(struct sk_buff *skb, struct tc_action *a,
|
|
|
|
int bind, int ref)
|
2008-09-12 23:30:20 +00:00
|
|
|
{
|
|
|
|
unsigned char *b = skb_tail_pointer(skb);
|
|
|
|
struct tcf_skbedit *d = a->priv;
|
2010-08-16 20:04:22 +00:00
|
|
|
struct tc_skbedit opt = {
|
|
|
|
.index = d->tcf_index,
|
|
|
|
.refcnt = d->tcf_refcnt - ref,
|
|
|
|
.bindcnt = d->tcf_bindcnt - bind,
|
|
|
|
.action = d->tcf_action,
|
|
|
|
};
|
2008-09-12 23:30:20 +00:00
|
|
|
struct tcf_t t;
|
|
|
|
|
2012-03-29 09:11:39 +00:00
|
|
|
if (nla_put(skb, TCA_SKBEDIT_PARMS, sizeof(opt), &opt))
|
|
|
|
goto nla_put_failure;
|
|
|
|
if ((d->flags & SKBEDIT_F_PRIORITY) &&
|
|
|
|
nla_put(skb, TCA_SKBEDIT_PRIORITY, sizeof(d->priority),
|
|
|
|
&d->priority))
|
|
|
|
goto nla_put_failure;
|
|
|
|
if ((d->flags & SKBEDIT_F_QUEUE_MAPPING) &&
|
|
|
|
nla_put(skb, TCA_SKBEDIT_QUEUE_MAPPING,
|
|
|
|
sizeof(d->queue_mapping), &d->queue_mapping))
|
|
|
|
goto nla_put_failure;
|
|
|
|
if ((d->flags & SKBEDIT_F_MARK) &&
|
|
|
|
nla_put(skb, TCA_SKBEDIT_MARK, sizeof(d->mark),
|
|
|
|
&d->mark))
|
|
|
|
goto nla_put_failure;
|
2008-09-12 23:30:20 +00:00
|
|
|
t.install = jiffies_to_clock_t(jiffies - d->tcf_tm.install);
|
|
|
|
t.lastuse = jiffies_to_clock_t(jiffies - d->tcf_tm.lastuse);
|
|
|
|
t.expires = jiffies_to_clock_t(d->tcf_tm.expires);
|
2012-03-29 09:11:39 +00:00
|
|
|
if (nla_put(skb, TCA_SKBEDIT_TM, sizeof(t), &t))
|
|
|
|
goto nla_put_failure;
|
2008-09-12 23:30:20 +00:00
|
|
|
return skb->len;
|
|
|
|
|
|
|
|
nla_put_failure:
|
|
|
|
nlmsg_trim(skb, b);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct tc_action_ops act_skbedit_ops = {
|
|
|
|
.kind = "skbedit",
|
|
|
|
.hinfo = &skbedit_hash_info,
|
|
|
|
.type = TCA_ACT_SKBEDIT,
|
|
|
|
.capab = TCA_CAP_NONE,
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.act = tcf_skbedit,
|
|
|
|
.dump = tcf_skbedit_dump,
|
|
|
|
.cleanup = tcf_skbedit_cleanup,
|
|
|
|
.init = tcf_skbedit_init,
|
|
|
|
};
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Alexander Duyck, <alexander.h.duyck@intel.com>");
|
|
|
|
MODULE_DESCRIPTION("SKB Editing");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
|
|
static int __init skbedit_init_module(void)
|
|
|
|
{
|
|
|
|
return tcf_register_action(&act_skbedit_ops);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit skbedit_cleanup_module(void)
|
|
|
|
{
|
|
|
|
tcf_unregister_action(&act_skbedit_ops);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(skbedit_init_module);
|
|
|
|
module_exit(skbedit_cleanup_module);
|