![WANG Cong](/assets/img/avatar_default.png)
For bindcnt and refcnt etc., they are common for all actions, not need to repeat such operations for their own, they can be unified now. Actions just need to do its specific cleanup if needed. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
206 lines
5.3 KiB
C
206 lines
5.3 KiB
C
/*
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* Copyright (c) 2008, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Alexander Duyck <alexander.h.duyck@intel.com>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/skbuff.h>
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#include <linux/rtnetlink.h>
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#include <net/netlink.h>
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#include <net/pkt_sched.h>
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#include <linux/tc_act/tc_skbedit.h>
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#include <net/tc_act/tc_skbedit.h>
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#define SKBEDIT_TAB_MASK 15
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static struct tcf_hashinfo skbedit_hash_info;
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static int tcf_skbedit(struct sk_buff *skb, const struct tc_action *a,
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struct tcf_result *res)
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{
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struct tcf_skbedit *d = a->priv;
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spin_lock(&d->tcf_lock);
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d->tcf_tm.lastuse = jiffies;
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bstats_update(&d->tcf_bstats, skb);
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if (d->flags & SKBEDIT_F_PRIORITY)
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skb->priority = d->priority;
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if (d->flags & SKBEDIT_F_QUEUE_MAPPING &&
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skb->dev->real_num_tx_queues > d->queue_mapping)
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skb_set_queue_mapping(skb, d->queue_mapping);
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if (d->flags & SKBEDIT_F_MARK)
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skb->mark = d->mark;
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spin_unlock(&d->tcf_lock);
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return d->tcf_action;
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}
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static const struct nla_policy skbedit_policy[TCA_SKBEDIT_MAX + 1] = {
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[TCA_SKBEDIT_PARMS] = { .len = sizeof(struct tc_skbedit) },
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[TCA_SKBEDIT_PRIORITY] = { .len = sizeof(u32) },
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[TCA_SKBEDIT_QUEUE_MAPPING] = { .len = sizeof(u16) },
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[TCA_SKBEDIT_MARK] = { .len = sizeof(u32) },
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};
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static int tcf_skbedit_init(struct net *net, struct nlattr *nla,
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struct nlattr *est, struct tc_action *a,
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int ovr, int bind)
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{
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struct nlattr *tb[TCA_SKBEDIT_MAX + 1];
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struct tc_skbedit *parm;
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struct tcf_skbedit *d;
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u32 flags = 0, *priority = NULL, *mark = NULL;
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u16 *queue_mapping = NULL;
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int ret = 0, err;
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if (nla == NULL)
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return -EINVAL;
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err = nla_parse_nested(tb, TCA_SKBEDIT_MAX, nla, skbedit_policy);
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if (err < 0)
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return err;
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if (tb[TCA_SKBEDIT_PARMS] == NULL)
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return -EINVAL;
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if (tb[TCA_SKBEDIT_PRIORITY] != NULL) {
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flags |= SKBEDIT_F_PRIORITY;
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priority = nla_data(tb[TCA_SKBEDIT_PRIORITY]);
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}
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if (tb[TCA_SKBEDIT_QUEUE_MAPPING] != NULL) {
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flags |= SKBEDIT_F_QUEUE_MAPPING;
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queue_mapping = nla_data(tb[TCA_SKBEDIT_QUEUE_MAPPING]);
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}
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if (tb[TCA_SKBEDIT_MARK] != NULL) {
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flags |= SKBEDIT_F_MARK;
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mark = nla_data(tb[TCA_SKBEDIT_MARK]);
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}
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if (!flags)
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return -EINVAL;
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parm = nla_data(tb[TCA_SKBEDIT_PARMS]);
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if (!tcf_hash_check(parm->index, a, bind)) {
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ret = tcf_hash_create(parm->index, est, a, sizeof(*d), bind);
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if (ret)
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return ret;
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d = to_skbedit(a);
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ret = ACT_P_CREATED;
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} else {
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d = to_skbedit(a);
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if (bind)
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return 0;
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tcf_hash_release(a, bind);
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if (!ovr)
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return -EEXIST;
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}
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spin_lock_bh(&d->tcf_lock);
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d->flags = flags;
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if (flags & SKBEDIT_F_PRIORITY)
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d->priority = *priority;
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if (flags & SKBEDIT_F_QUEUE_MAPPING)
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d->queue_mapping = *queue_mapping;
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if (flags & SKBEDIT_F_MARK)
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d->mark = *mark;
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d->tcf_action = parm->action;
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spin_unlock_bh(&d->tcf_lock);
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if (ret == ACT_P_CREATED)
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tcf_hash_insert(a);
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return ret;
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}
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static int tcf_skbedit_dump(struct sk_buff *skb, struct tc_action *a,
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int bind, int ref)
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{
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unsigned char *b = skb_tail_pointer(skb);
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struct tcf_skbedit *d = a->priv;
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struct tc_skbedit opt = {
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.index = d->tcf_index,
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.refcnt = d->tcf_refcnt - ref,
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.bindcnt = d->tcf_bindcnt - bind,
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.action = d->tcf_action,
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};
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struct tcf_t t;
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if (nla_put(skb, TCA_SKBEDIT_PARMS, sizeof(opt), &opt))
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goto nla_put_failure;
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if ((d->flags & SKBEDIT_F_PRIORITY) &&
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nla_put(skb, TCA_SKBEDIT_PRIORITY, sizeof(d->priority),
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&d->priority))
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goto nla_put_failure;
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if ((d->flags & SKBEDIT_F_QUEUE_MAPPING) &&
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nla_put(skb, TCA_SKBEDIT_QUEUE_MAPPING,
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sizeof(d->queue_mapping), &d->queue_mapping))
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goto nla_put_failure;
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if ((d->flags & SKBEDIT_F_MARK) &&
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nla_put(skb, TCA_SKBEDIT_MARK, sizeof(d->mark),
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&d->mark))
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goto nla_put_failure;
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t.install = jiffies_to_clock_t(jiffies - d->tcf_tm.install);
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t.lastuse = jiffies_to_clock_t(jiffies - d->tcf_tm.lastuse);
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t.expires = jiffies_to_clock_t(d->tcf_tm.expires);
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if (nla_put(skb, TCA_SKBEDIT_TM, sizeof(t), &t))
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goto nla_put_failure;
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return skb->len;
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nla_put_failure:
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nlmsg_trim(skb, b);
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return -1;
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}
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static struct tc_action_ops act_skbedit_ops = {
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.kind = "skbedit",
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.hinfo = &skbedit_hash_info,
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.type = TCA_ACT_SKBEDIT,
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.owner = THIS_MODULE,
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.act = tcf_skbedit,
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.dump = tcf_skbedit_dump,
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.init = tcf_skbedit_init,
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};
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MODULE_AUTHOR("Alexander Duyck, <alexander.h.duyck@intel.com>");
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MODULE_DESCRIPTION("SKB Editing");
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MODULE_LICENSE("GPL");
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static int __init skbedit_init_module(void)
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{
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int err = tcf_hashinfo_init(&skbedit_hash_info, SKBEDIT_TAB_MASK);
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if (err)
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return err;
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return tcf_register_action(&act_skbedit_ops);
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}
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static void __exit skbedit_cleanup_module(void)
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{
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tcf_hashinfo_destroy(&skbedit_hash_info);
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tcf_unregister_action(&act_skbedit_ops);
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}
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module_init(skbedit_init_module);
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module_exit(skbedit_cleanup_module);
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