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![Cong Wang](/assets/img/avatar_default.png)
No one actually uses it. Cc: Jiri Pirko <jiri@mellanox.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1485 lines
33 KiB
C
1485 lines
33 KiB
C
/*
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* net/sched/act_api.c Packet action API.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Author: Jamal Hadi Salim
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*
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*
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/skbuff.h>
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#include <linux/init.h>
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#include <linux/kmod.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/rhashtable.h>
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#include <linux/list.h>
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#include <net/net_namespace.h>
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#include <net/sock.h>
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#include <net/sch_generic.h>
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#include <net/pkt_cls.h>
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#include <net/act_api.h>
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#include <net/netlink.h>
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static int tcf_action_goto_chain_init(struct tc_action *a, struct tcf_proto *tp)
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{
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u32 chain_index = a->tcfa_action & TC_ACT_EXT_VAL_MASK;
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if (!tp)
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return -EINVAL;
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a->goto_chain = tcf_chain_get(tp->chain->block, chain_index, true);
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if (!a->goto_chain)
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return -ENOMEM;
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return 0;
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}
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static void tcf_action_goto_chain_fini(struct tc_action *a)
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{
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tcf_chain_put(a->goto_chain);
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}
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static void tcf_action_goto_chain_exec(const struct tc_action *a,
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struct tcf_result *res)
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{
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const struct tcf_chain *chain = a->goto_chain;
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res->goto_tp = rcu_dereference_bh(chain->filter_chain);
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}
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/* XXX: For standalone actions, we don't need a RCU grace period either, because
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* actions are always connected to filters and filters are already destroyed in
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* RCU callbacks, so after a RCU grace period actions are already disconnected
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* from filters. Readers later can not find us.
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*/
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static void free_tcf(struct tc_action *p)
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{
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free_percpu(p->cpu_bstats);
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free_percpu(p->cpu_qstats);
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if (p->act_cookie) {
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kfree(p->act_cookie->data);
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kfree(p->act_cookie);
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}
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if (p->goto_chain)
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tcf_action_goto_chain_fini(p);
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kfree(p);
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}
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static void tcf_idr_remove(struct tcf_idrinfo *idrinfo, struct tc_action *p)
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{
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spin_lock_bh(&idrinfo->lock);
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idr_remove_ext(&idrinfo->action_idr, p->tcfa_index);
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spin_unlock_bh(&idrinfo->lock);
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gen_kill_estimator(&p->tcfa_rate_est);
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free_tcf(p);
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}
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int __tcf_idr_release(struct tc_action *p, bool bind, bool strict)
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{
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int ret = 0;
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ASSERT_RTNL();
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if (p) {
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if (bind)
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p->tcfa_bindcnt--;
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else if (strict && p->tcfa_bindcnt > 0)
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return -EPERM;
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p->tcfa_refcnt--;
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if (p->tcfa_bindcnt <= 0 && p->tcfa_refcnt <= 0) {
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if (p->ops->cleanup)
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p->ops->cleanup(p);
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tcf_idr_remove(p->idrinfo, p);
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ret = ACT_P_DELETED;
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}
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}
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return ret;
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}
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EXPORT_SYMBOL(__tcf_idr_release);
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static int tcf_dump_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb,
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struct netlink_callback *cb)
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{
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int err = 0, index = -1, s_i = 0, n_i = 0;
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u32 act_flags = cb->args[2];
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unsigned long jiffy_since = cb->args[3];
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struct nlattr *nest;
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struct idr *idr = &idrinfo->action_idr;
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struct tc_action *p;
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unsigned long id = 1;
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spin_lock_bh(&idrinfo->lock);
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s_i = cb->args[0];
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idr_for_each_entry_ext(idr, p, id) {
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index++;
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if (index < s_i)
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continue;
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if (jiffy_since &&
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time_after(jiffy_since,
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(unsigned long)p->tcfa_tm.lastuse))
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continue;
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nest = nla_nest_start(skb, n_i);
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if (!nest)
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goto nla_put_failure;
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err = tcf_action_dump_1(skb, p, 0, 0);
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if (err < 0) {
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index--;
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nlmsg_trim(skb, nest);
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goto done;
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}
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nla_nest_end(skb, nest);
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n_i++;
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if (!(act_flags & TCA_FLAG_LARGE_DUMP_ON) &&
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n_i >= TCA_ACT_MAX_PRIO)
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goto done;
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}
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done:
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if (index >= 0)
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cb->args[0] = index + 1;
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spin_unlock_bh(&idrinfo->lock);
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if (n_i) {
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if (act_flags & TCA_FLAG_LARGE_DUMP_ON)
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cb->args[1] = n_i;
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}
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return n_i;
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nla_put_failure:
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nla_nest_cancel(skb, nest);
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goto done;
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}
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static int tcf_del_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb,
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const struct tc_action_ops *ops)
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{
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struct nlattr *nest;
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int n_i = 0;
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int ret = -EINVAL;
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struct idr *idr = &idrinfo->action_idr;
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struct tc_action *p;
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unsigned long id = 1;
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nest = nla_nest_start(skb, 0);
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if (nest == NULL)
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goto nla_put_failure;
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if (nla_put_string(skb, TCA_KIND, ops->kind))
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goto nla_put_failure;
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idr_for_each_entry_ext(idr, p, id) {
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ret = __tcf_idr_release(p, false, true);
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if (ret == ACT_P_DELETED) {
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module_put(ops->owner);
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n_i++;
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} else if (ret < 0) {
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goto nla_put_failure;
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}
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}
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if (nla_put_u32(skb, TCA_FCNT, n_i))
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goto nla_put_failure;
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nla_nest_end(skb, nest);
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return n_i;
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nla_put_failure:
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nla_nest_cancel(skb, nest);
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return ret;
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}
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int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
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struct netlink_callback *cb, int type,
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const struct tc_action_ops *ops)
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{
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struct tcf_idrinfo *idrinfo = tn->idrinfo;
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if (type == RTM_DELACTION) {
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return tcf_del_walker(idrinfo, skb, ops);
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} else if (type == RTM_GETACTION) {
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return tcf_dump_walker(idrinfo, skb, cb);
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} else {
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WARN(1, "tcf_generic_walker: unknown action %d\n", type);
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return -EINVAL;
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}
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}
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EXPORT_SYMBOL(tcf_generic_walker);
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static struct tc_action *tcf_idr_lookup(u32 index, struct tcf_idrinfo *idrinfo)
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{
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struct tc_action *p = NULL;
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spin_lock_bh(&idrinfo->lock);
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p = idr_find_ext(&idrinfo->action_idr, index);
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spin_unlock_bh(&idrinfo->lock);
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return p;
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}
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int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index)
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{
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struct tcf_idrinfo *idrinfo = tn->idrinfo;
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struct tc_action *p = tcf_idr_lookup(index, idrinfo);
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if (p) {
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*a = p;
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return 1;
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}
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return 0;
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}
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EXPORT_SYMBOL(tcf_idr_search);
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bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
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int bind)
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{
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struct tcf_idrinfo *idrinfo = tn->idrinfo;
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struct tc_action *p = tcf_idr_lookup(index, idrinfo);
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if (index && p) {
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if (bind)
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p->tcfa_bindcnt++;
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p->tcfa_refcnt++;
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*a = p;
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return true;
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}
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return false;
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}
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EXPORT_SYMBOL(tcf_idr_check);
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void tcf_idr_cleanup(struct tc_action *a, struct nlattr *est)
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{
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if (est)
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gen_kill_estimator(&a->tcfa_rate_est);
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free_tcf(a);
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}
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EXPORT_SYMBOL(tcf_idr_cleanup);
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int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
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struct tc_action **a, const struct tc_action_ops *ops,
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int bind, bool cpustats)
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{
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struct tc_action *p = kzalloc(ops->size, GFP_KERNEL);
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struct tcf_idrinfo *idrinfo = tn->idrinfo;
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struct idr *idr = &idrinfo->action_idr;
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int err = -ENOMEM;
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unsigned long idr_index;
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if (unlikely(!p))
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return -ENOMEM;
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p->tcfa_refcnt = 1;
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if (bind)
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p->tcfa_bindcnt = 1;
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if (cpustats) {
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p->cpu_bstats = netdev_alloc_pcpu_stats(struct gnet_stats_basic_cpu);
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if (!p->cpu_bstats) {
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err1:
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kfree(p);
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return err;
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}
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p->cpu_qstats = alloc_percpu(struct gnet_stats_queue);
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if (!p->cpu_qstats) {
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err2:
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free_percpu(p->cpu_bstats);
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goto err1;
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}
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}
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spin_lock_init(&p->tcfa_lock);
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/* user doesn't specify an index */
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if (!index) {
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idr_preload(GFP_KERNEL);
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spin_lock_bh(&idrinfo->lock);
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err = idr_alloc_ext(idr, NULL, &idr_index, 1, 0,
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GFP_ATOMIC);
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spin_unlock_bh(&idrinfo->lock);
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idr_preload_end();
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if (err) {
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err3:
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free_percpu(p->cpu_qstats);
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goto err2;
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}
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p->tcfa_index = idr_index;
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} else {
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idr_preload(GFP_KERNEL);
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spin_lock_bh(&idrinfo->lock);
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err = idr_alloc_ext(idr, NULL, NULL, index, index + 1,
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GFP_ATOMIC);
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spin_unlock_bh(&idrinfo->lock);
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idr_preload_end();
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if (err)
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goto err3;
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p->tcfa_index = index;
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}
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p->tcfa_tm.install = jiffies;
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p->tcfa_tm.lastuse = jiffies;
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p->tcfa_tm.firstuse = 0;
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if (est) {
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err = gen_new_estimator(&p->tcfa_bstats, p->cpu_bstats,
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&p->tcfa_rate_est,
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&p->tcfa_lock, NULL, est);
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if (err) {
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goto err3;
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}
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}
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p->idrinfo = idrinfo;
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p->ops = ops;
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INIT_LIST_HEAD(&p->list);
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*a = p;
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return 0;
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}
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EXPORT_SYMBOL(tcf_idr_create);
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|
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void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a)
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{
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struct tcf_idrinfo *idrinfo = tn->idrinfo;
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|
|
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spin_lock_bh(&idrinfo->lock);
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idr_replace_ext(&idrinfo->action_idr, a, a->tcfa_index);
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spin_unlock_bh(&idrinfo->lock);
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}
|
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EXPORT_SYMBOL(tcf_idr_insert);
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|
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void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
|
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struct tcf_idrinfo *idrinfo)
|
|
{
|
|
struct idr *idr = &idrinfo->action_idr;
|
|
struct tc_action *p;
|
|
int ret;
|
|
unsigned long id = 1;
|
|
|
|
idr_for_each_entry_ext(idr, p, id) {
|
|
ret = __tcf_idr_release(p, false, true);
|
|
if (ret == ACT_P_DELETED)
|
|
module_put(ops->owner);
|
|
else if (ret < 0)
|
|
return;
|
|
}
|
|
idr_destroy(&idrinfo->action_idr);
|
|
}
|
|
EXPORT_SYMBOL(tcf_idrinfo_destroy);
|
|
|
|
static LIST_HEAD(act_base);
|
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static DEFINE_RWLOCK(act_mod_lock);
|
|
|
|
int tcf_register_action(struct tc_action_ops *act,
|
|
struct pernet_operations *ops)
|
|
{
|
|
struct tc_action_ops *a;
|
|
int ret;
|
|
|
|
if (!act->act || !act->dump || !act->init || !act->walk || !act->lookup)
|
|
return -EINVAL;
|
|
|
|
/* We have to register pernet ops before making the action ops visible,
|
|
* otherwise tcf_action_init_1() could get a partially initialized
|
|
* netns.
|
|
*/
|
|
ret = register_pernet_subsys(ops);
|
|
if (ret)
|
|
return ret;
|
|
|
|
write_lock(&act_mod_lock);
|
|
list_for_each_entry(a, &act_base, head) {
|
|
if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) {
|
|
write_unlock(&act_mod_lock);
|
|
unregister_pernet_subsys(ops);
|
|
return -EEXIST;
|
|
}
|
|
}
|
|
list_add_tail(&act->head, &act_base);
|
|
write_unlock(&act_mod_lock);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(tcf_register_action);
|
|
|
|
int tcf_unregister_action(struct tc_action_ops *act,
|
|
struct pernet_operations *ops)
|
|
{
|
|
struct tc_action_ops *a;
|
|
int err = -ENOENT;
|
|
|
|
write_lock(&act_mod_lock);
|
|
list_for_each_entry(a, &act_base, head) {
|
|
if (a == act) {
|
|
list_del(&act->head);
|
|
err = 0;
|
|
break;
|
|
}
|
|
}
|
|
write_unlock(&act_mod_lock);
|
|
if (!err)
|
|
unregister_pernet_subsys(ops);
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(tcf_unregister_action);
|
|
|
|
/* lookup by name */
|
|
static struct tc_action_ops *tc_lookup_action_n(char *kind)
|
|
{
|
|
struct tc_action_ops *a, *res = NULL;
|
|
|
|
if (kind) {
|
|
read_lock(&act_mod_lock);
|
|
list_for_each_entry(a, &act_base, head) {
|
|
if (strcmp(kind, a->kind) == 0) {
|
|
if (try_module_get(a->owner))
|
|
res = a;
|
|
break;
|
|
}
|
|
}
|
|
read_unlock(&act_mod_lock);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/* lookup by nlattr */
|
|
static struct tc_action_ops *tc_lookup_action(struct nlattr *kind)
|
|
{
|
|
struct tc_action_ops *a, *res = NULL;
|
|
|
|
if (kind) {
|
|
read_lock(&act_mod_lock);
|
|
list_for_each_entry(a, &act_base, head) {
|
|
if (nla_strcmp(kind, a->kind) == 0) {
|
|
if (try_module_get(a->owner))
|
|
res = a;
|
|
break;
|
|
}
|
|
}
|
|
read_unlock(&act_mod_lock);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/*TCA_ACT_MAX_PRIO is 32, there count upto 32 */
|
|
#define TCA_ACT_MAX_PRIO_MASK 0x1FF
|
|
int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
|
|
int nr_actions, struct tcf_result *res)
|
|
{
|
|
u32 jmp_prgcnt = 0;
|
|
u32 jmp_ttl = TCA_ACT_MAX_PRIO; /*matches actions per filter */
|
|
int i;
|
|
int ret = TC_ACT_OK;
|
|
|
|
if (skb_skip_tc_classify(skb))
|
|
return TC_ACT_OK;
|
|
|
|
restart_act_graph:
|
|
for (i = 0; i < nr_actions; i++) {
|
|
const struct tc_action *a = actions[i];
|
|
|
|
if (jmp_prgcnt > 0) {
|
|
jmp_prgcnt -= 1;
|
|
continue;
|
|
}
|
|
repeat:
|
|
ret = a->ops->act(skb, a, res);
|
|
if (ret == TC_ACT_REPEAT)
|
|
goto repeat; /* we need a ttl - JHS */
|
|
|
|
if (TC_ACT_EXT_CMP(ret, TC_ACT_JUMP)) {
|
|
jmp_prgcnt = ret & TCA_ACT_MAX_PRIO_MASK;
|
|
if (!jmp_prgcnt || (jmp_prgcnt > nr_actions)) {
|
|
/* faulty opcode, stop pipeline */
|
|
return TC_ACT_OK;
|
|
} else {
|
|
jmp_ttl -= 1;
|
|
if (jmp_ttl > 0)
|
|
goto restart_act_graph;
|
|
else /* faulty graph, stop pipeline */
|
|
return TC_ACT_OK;
|
|
}
|
|
} else if (TC_ACT_EXT_CMP(ret, TC_ACT_GOTO_CHAIN)) {
|
|
tcf_action_goto_chain_exec(a, res);
|
|
}
|
|
|
|
if (ret != TC_ACT_PIPE)
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(tcf_action_exec);
|
|
|
|
int tcf_action_destroy(struct list_head *actions, int bind)
|
|
{
|
|
const struct tc_action_ops *ops;
|
|
struct tc_action *a, *tmp;
|
|
int ret = 0;
|
|
|
|
list_for_each_entry_safe(a, tmp, actions, list) {
|
|
ops = a->ops;
|
|
ret = __tcf_idr_release(a, bind, true);
|
|
if (ret == ACT_P_DELETED)
|
|
module_put(ops->owner);
|
|
else if (ret < 0)
|
|
return ret;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
|
|
{
|
|
return a->ops->dump(skb, a, bind, ref);
|
|
}
|
|
|
|
int
|
|
tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
|
|
{
|
|
int err = -EINVAL;
|
|
unsigned char *b = skb_tail_pointer(skb);
|
|
struct nlattr *nest;
|
|
|
|
if (nla_put_string(skb, TCA_KIND, a->ops->kind))
|
|
goto nla_put_failure;
|
|
if (tcf_action_copy_stats(skb, a, 0))
|
|
goto nla_put_failure;
|
|
if (a->act_cookie) {
|
|
if (nla_put(skb, TCA_ACT_COOKIE, a->act_cookie->len,
|
|
a->act_cookie->data))
|
|
goto nla_put_failure;
|
|
}
|
|
|
|
nest = nla_nest_start(skb, TCA_OPTIONS);
|
|
if (nest == NULL)
|
|
goto nla_put_failure;
|
|
err = tcf_action_dump_old(skb, a, bind, ref);
|
|
if (err > 0) {
|
|
nla_nest_end(skb, nest);
|
|
return err;
|
|
}
|
|
|
|
nla_put_failure:
|
|
nlmsg_trim(skb, b);
|
|
return -1;
|
|
}
|
|
EXPORT_SYMBOL(tcf_action_dump_1);
|
|
|
|
int tcf_action_dump(struct sk_buff *skb, struct list_head *actions,
|
|
int bind, int ref)
|
|
{
|
|
struct tc_action *a;
|
|
int err = -EINVAL;
|
|
struct nlattr *nest;
|
|
|
|
list_for_each_entry(a, actions, list) {
|
|
nest = nla_nest_start(skb, a->order);
|
|
if (nest == NULL)
|
|
goto nla_put_failure;
|
|
err = tcf_action_dump_1(skb, a, bind, ref);
|
|
if (err < 0)
|
|
goto errout;
|
|
nla_nest_end(skb, nest);
|
|
}
|
|
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
err = -EINVAL;
|
|
errout:
|
|
nla_nest_cancel(skb, nest);
|
|
return err;
|
|
}
|
|
|
|
static struct tc_cookie *nla_memdup_cookie(struct nlattr **tb)
|
|
{
|
|
struct tc_cookie *c = kzalloc(sizeof(*c), GFP_KERNEL);
|
|
if (!c)
|
|
return NULL;
|
|
|
|
c->data = nla_memdup(tb[TCA_ACT_COOKIE], GFP_KERNEL);
|
|
if (!c->data) {
|
|
kfree(c);
|
|
return NULL;
|
|
}
|
|
c->len = nla_len(tb[TCA_ACT_COOKIE]);
|
|
|
|
return c;
|
|
}
|
|
|
|
struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
|
|
struct nlattr *nla, struct nlattr *est,
|
|
char *name, int ovr, int bind)
|
|
{
|
|
struct tc_action *a;
|
|
struct tc_action_ops *a_o;
|
|
struct tc_cookie *cookie = NULL;
|
|
char act_name[IFNAMSIZ];
|
|
struct nlattr *tb[TCA_ACT_MAX + 1];
|
|
struct nlattr *kind;
|
|
int err;
|
|
|
|
if (name == NULL) {
|
|
err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL, NULL);
|
|
if (err < 0)
|
|
goto err_out;
|
|
err = -EINVAL;
|
|
kind = tb[TCA_ACT_KIND];
|
|
if (kind == NULL)
|
|
goto err_out;
|
|
if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ)
|
|
goto err_out;
|
|
if (tb[TCA_ACT_COOKIE]) {
|
|
int cklen = nla_len(tb[TCA_ACT_COOKIE]);
|
|
|
|
if (cklen > TC_COOKIE_MAX_SIZE)
|
|
goto err_out;
|
|
|
|
cookie = nla_memdup_cookie(tb);
|
|
if (!cookie) {
|
|
err = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
}
|
|
} else {
|
|
err = -EINVAL;
|
|
if (strlcpy(act_name, name, IFNAMSIZ) >= IFNAMSIZ)
|
|
goto err_out;
|
|
}
|
|
|
|
a_o = tc_lookup_action_n(act_name);
|
|
if (a_o == NULL) {
|
|
#ifdef CONFIG_MODULES
|
|
rtnl_unlock();
|
|
request_module("act_%s", act_name);
|
|
rtnl_lock();
|
|
|
|
a_o = tc_lookup_action_n(act_name);
|
|
|
|
/* We dropped the RTNL semaphore in order to
|
|
* perform the module load. So, even if we
|
|
* succeeded in loading the module we have to
|
|
* tell the caller to replay the request. We
|
|
* indicate this using -EAGAIN.
|
|
*/
|
|
if (a_o != NULL) {
|
|
err = -EAGAIN;
|
|
goto err_mod;
|
|
}
|
|
#endif
|
|
err = -ENOENT;
|
|
goto err_out;
|
|
}
|
|
|
|
/* backward compatibility for policer */
|
|
if (name == NULL)
|
|
err = a_o->init(net, tb[TCA_ACT_OPTIONS], est, &a, ovr, bind);
|
|
else
|
|
err = a_o->init(net, nla, est, &a, ovr, bind);
|
|
if (err < 0)
|
|
goto err_mod;
|
|
|
|
if (name == NULL && tb[TCA_ACT_COOKIE]) {
|
|
if (a->act_cookie) {
|
|
kfree(a->act_cookie->data);
|
|
kfree(a->act_cookie);
|
|
}
|
|
a->act_cookie = cookie;
|
|
}
|
|
|
|
/* module count goes up only when brand new policy is created
|
|
* if it exists and is only bound to in a_o->init() then
|
|
* ACT_P_CREATED is not returned (a zero is).
|
|
*/
|
|
if (err != ACT_P_CREATED)
|
|
module_put(a_o->owner);
|
|
|
|
if (TC_ACT_EXT_CMP(a->tcfa_action, TC_ACT_GOTO_CHAIN)) {
|
|
err = tcf_action_goto_chain_init(a, tp);
|
|
if (err) {
|
|
LIST_HEAD(actions);
|
|
|
|
list_add_tail(&a->list, &actions);
|
|
tcf_action_destroy(&actions, bind);
|
|
return ERR_PTR(err);
|
|
}
|
|
}
|
|
|
|
return a;
|
|
|
|
err_mod:
|
|
module_put(a_o->owner);
|
|
err_out:
|
|
if (cookie) {
|
|
kfree(cookie->data);
|
|
kfree(cookie);
|
|
}
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
static void cleanup_a(struct list_head *actions, int ovr)
|
|
{
|
|
struct tc_action *a;
|
|
|
|
if (!ovr)
|
|
return;
|
|
|
|
list_for_each_entry(a, actions, list)
|
|
a->tcfa_refcnt--;
|
|
}
|
|
|
|
int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
|
|
struct nlattr *est, char *name, int ovr, int bind,
|
|
struct list_head *actions)
|
|
{
|
|
struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
|
|
struct tc_action *act;
|
|
int err;
|
|
int i;
|
|
|
|
err = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL, NULL);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
|
|
act = tcf_action_init_1(net, tp, tb[i], est, name, ovr, bind);
|
|
if (IS_ERR(act)) {
|
|
err = PTR_ERR(act);
|
|
goto err;
|
|
}
|
|
act->order = i;
|
|
if (ovr)
|
|
act->tcfa_refcnt++;
|
|
list_add_tail(&act->list, actions);
|
|
}
|
|
|
|
/* Remove the temp refcnt which was necessary to protect against
|
|
* destroying an existing action which was being replaced
|
|
*/
|
|
cleanup_a(actions, ovr);
|
|
return 0;
|
|
|
|
err:
|
|
tcf_action_destroy(actions, bind);
|
|
return err;
|
|
}
|
|
|
|
int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *p,
|
|
int compat_mode)
|
|
{
|
|
int err = 0;
|
|
struct gnet_dump d;
|
|
|
|
if (p == NULL)
|
|
goto errout;
|
|
|
|
/* compat_mode being true specifies a call that is supposed
|
|
* to add additional backward compatibility statistic TLVs.
|
|
*/
|
|
if (compat_mode) {
|
|
if (p->type == TCA_OLD_COMPAT)
|
|
err = gnet_stats_start_copy_compat(skb, 0,
|
|
TCA_STATS,
|
|
TCA_XSTATS,
|
|
&p->tcfa_lock, &d,
|
|
TCA_PAD);
|
|
else
|
|
return 0;
|
|
} else
|
|
err = gnet_stats_start_copy(skb, TCA_ACT_STATS,
|
|
&p->tcfa_lock, &d, TCA_ACT_PAD);
|
|
|
|
if (err < 0)
|
|
goto errout;
|
|
|
|
if (gnet_stats_copy_basic(NULL, &d, p->cpu_bstats, &p->tcfa_bstats) < 0 ||
|
|
gnet_stats_copy_rate_est(&d, &p->tcfa_rate_est) < 0 ||
|
|
gnet_stats_copy_queue(&d, p->cpu_qstats,
|
|
&p->tcfa_qstats,
|
|
p->tcfa_qstats.qlen) < 0)
|
|
goto errout;
|
|
|
|
if (gnet_stats_finish_copy(&d) < 0)
|
|
goto errout;
|
|
|
|
return 0;
|
|
|
|
errout:
|
|
return -1;
|
|
}
|
|
|
|
static int tca_get_fill(struct sk_buff *skb, struct list_head *actions,
|
|
u32 portid, u32 seq, u16 flags, int event, int bind,
|
|
int ref)
|
|
{
|
|
struct tcamsg *t;
|
|
struct nlmsghdr *nlh;
|
|
unsigned char *b = skb_tail_pointer(skb);
|
|
struct nlattr *nest;
|
|
|
|
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*t), flags);
|
|
if (!nlh)
|
|
goto out_nlmsg_trim;
|
|
t = nlmsg_data(nlh);
|
|
t->tca_family = AF_UNSPEC;
|
|
t->tca__pad1 = 0;
|
|
t->tca__pad2 = 0;
|
|
|
|
nest = nla_nest_start(skb, TCA_ACT_TAB);
|
|
if (nest == NULL)
|
|
goto out_nlmsg_trim;
|
|
|
|
if (tcf_action_dump(skb, actions, bind, ref) < 0)
|
|
goto out_nlmsg_trim;
|
|
|
|
nla_nest_end(skb, nest);
|
|
|
|
nlh->nlmsg_len = skb_tail_pointer(skb) - b;
|
|
return skb->len;
|
|
|
|
out_nlmsg_trim:
|
|
nlmsg_trim(skb, b);
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
tcf_get_notify(struct net *net, u32 portid, struct nlmsghdr *n,
|
|
struct list_head *actions, int event)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
|
|
if (!skb)
|
|
return -ENOBUFS;
|
|
if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, event,
|
|
0, 0) <= 0) {
|
|
kfree_skb(skb);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return rtnl_unicast(skb, net, portid);
|
|
}
|
|
|
|
static struct tc_action *tcf_action_get_1(struct net *net, struct nlattr *nla,
|
|
struct nlmsghdr *n, u32 portid)
|
|
{
|
|
struct nlattr *tb[TCA_ACT_MAX + 1];
|
|
const struct tc_action_ops *ops;
|
|
struct tc_action *a;
|
|
int index;
|
|
int err;
|
|
|
|
err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL, NULL);
|
|
if (err < 0)
|
|
goto err_out;
|
|
|
|
err = -EINVAL;
|
|
if (tb[TCA_ACT_INDEX] == NULL ||
|
|
nla_len(tb[TCA_ACT_INDEX]) < sizeof(index))
|
|
goto err_out;
|
|
index = nla_get_u32(tb[TCA_ACT_INDEX]);
|
|
|
|
err = -EINVAL;
|
|
ops = tc_lookup_action(tb[TCA_ACT_KIND]);
|
|
if (!ops) /* could happen in batch of actions */
|
|
goto err_out;
|
|
err = -ENOENT;
|
|
if (ops->lookup(net, &a, index) == 0)
|
|
goto err_mod;
|
|
|
|
module_put(ops->owner);
|
|
return a;
|
|
|
|
err_mod:
|
|
module_put(ops->owner);
|
|
err_out:
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
static int tca_action_flush(struct net *net, struct nlattr *nla,
|
|
struct nlmsghdr *n, u32 portid)
|
|
{
|
|
struct sk_buff *skb;
|
|
unsigned char *b;
|
|
struct nlmsghdr *nlh;
|
|
struct tcamsg *t;
|
|
struct netlink_callback dcb;
|
|
struct nlattr *nest;
|
|
struct nlattr *tb[TCA_ACT_MAX + 1];
|
|
const struct tc_action_ops *ops;
|
|
struct nlattr *kind;
|
|
int err = -ENOMEM;
|
|
|
|
skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
|
|
if (!skb) {
|
|
pr_debug("tca_action_flush: failed skb alloc\n");
|
|
return err;
|
|
}
|
|
|
|
b = skb_tail_pointer(skb);
|
|
|
|
err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL, NULL);
|
|
if (err < 0)
|
|
goto err_out;
|
|
|
|
err = -EINVAL;
|
|
kind = tb[TCA_ACT_KIND];
|
|
ops = tc_lookup_action(kind);
|
|
if (!ops) /*some idjot trying to flush unknown action */
|
|
goto err_out;
|
|
|
|
nlh = nlmsg_put(skb, portid, n->nlmsg_seq, RTM_DELACTION,
|
|
sizeof(*t), 0);
|
|
if (!nlh)
|
|
goto out_module_put;
|
|
t = nlmsg_data(nlh);
|
|
t->tca_family = AF_UNSPEC;
|
|
t->tca__pad1 = 0;
|
|
t->tca__pad2 = 0;
|
|
|
|
nest = nla_nest_start(skb, TCA_ACT_TAB);
|
|
if (nest == NULL)
|
|
goto out_module_put;
|
|
|
|
err = ops->walk(net, skb, &dcb, RTM_DELACTION, ops);
|
|
if (err <= 0)
|
|
goto out_module_put;
|
|
|
|
nla_nest_end(skb, nest);
|
|
|
|
nlh->nlmsg_len = skb_tail_pointer(skb) - b;
|
|
nlh->nlmsg_flags |= NLM_F_ROOT;
|
|
module_put(ops->owner);
|
|
err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
|
|
n->nlmsg_flags & NLM_F_ECHO);
|
|
if (err > 0)
|
|
return 0;
|
|
|
|
return err;
|
|
|
|
out_module_put:
|
|
module_put(ops->owner);
|
|
err_out:
|
|
kfree_skb(skb);
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
tcf_del_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions,
|
|
u32 portid)
|
|
{
|
|
int ret;
|
|
struct sk_buff *skb;
|
|
|
|
skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
|
|
if (!skb)
|
|
return -ENOBUFS;
|
|
|
|
if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, RTM_DELACTION,
|
|
0, 1) <= 0) {
|
|
kfree_skb(skb);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* now do the delete */
|
|
ret = tcf_action_destroy(actions, 0);
|
|
if (ret < 0) {
|
|
kfree_skb(skb);
|
|
return ret;
|
|
}
|
|
|
|
ret = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
|
|
n->nlmsg_flags & NLM_F_ECHO);
|
|
if (ret > 0)
|
|
return 0;
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
tca_action_gd(struct net *net, struct nlattr *nla, struct nlmsghdr *n,
|
|
u32 portid, int event)
|
|
{
|
|
int i, ret;
|
|
struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
|
|
struct tc_action *act;
|
|
LIST_HEAD(actions);
|
|
|
|
ret = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL, NULL);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (event == RTM_DELACTION && n->nlmsg_flags & NLM_F_ROOT) {
|
|
if (tb[1] != NULL)
|
|
return tca_action_flush(net, tb[1], n, portid);
|
|
else
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
|
|
act = tcf_action_get_1(net, tb[i], n, portid);
|
|
if (IS_ERR(act)) {
|
|
ret = PTR_ERR(act);
|
|
goto err;
|
|
}
|
|
act->order = i;
|
|
list_add_tail(&act->list, &actions);
|
|
}
|
|
|
|
if (event == RTM_GETACTION)
|
|
ret = tcf_get_notify(net, portid, n, &actions, event);
|
|
else { /* delete */
|
|
ret = tcf_del_notify(net, n, &actions, portid);
|
|
if (ret)
|
|
goto err;
|
|
return ret;
|
|
}
|
|
err:
|
|
if (event != RTM_GETACTION)
|
|
tcf_action_destroy(&actions, 0);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
tcf_add_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions,
|
|
u32 portid)
|
|
{
|
|
struct sk_buff *skb;
|
|
int err = 0;
|
|
|
|
skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
|
|
if (!skb)
|
|
return -ENOBUFS;
|
|
|
|
if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, n->nlmsg_flags,
|
|
RTM_NEWACTION, 0, 0) <= 0) {
|
|
kfree_skb(skb);
|
|
return -EINVAL;
|
|
}
|
|
|
|
err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
|
|
n->nlmsg_flags & NLM_F_ECHO);
|
|
if (err > 0)
|
|
err = 0;
|
|
return err;
|
|
}
|
|
|
|
static int tcf_action_add(struct net *net, struct nlattr *nla,
|
|
struct nlmsghdr *n, u32 portid, int ovr)
|
|
{
|
|
int ret = 0;
|
|
LIST_HEAD(actions);
|
|
|
|
ret = tcf_action_init(net, NULL, nla, NULL, NULL, ovr, 0, &actions);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return tcf_add_notify(net, n, &actions, portid);
|
|
}
|
|
|
|
static u32 tcaa_root_flags_allowed = TCA_FLAG_LARGE_DUMP_ON;
|
|
static const struct nla_policy tcaa_policy[TCA_ROOT_MAX + 1] = {
|
|
[TCA_ROOT_FLAGS] = { .type = NLA_BITFIELD32,
|
|
.validation_data = &tcaa_root_flags_allowed },
|
|
[TCA_ROOT_TIME_DELTA] = { .type = NLA_U32 },
|
|
};
|
|
|
|
static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct nlattr *tca[TCA_ROOT_MAX + 1];
|
|
u32 portid = skb ? NETLINK_CB(skb).portid : 0;
|
|
int ret = 0, ovr = 0;
|
|
|
|
if ((n->nlmsg_type != RTM_GETACTION) &&
|
|
!netlink_capable(skb, CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
ret = nlmsg_parse(n, sizeof(struct tcamsg), tca, TCA_ROOT_MAX, NULL,
|
|
extack);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (tca[TCA_ACT_TAB] == NULL) {
|
|
pr_notice("tc_ctl_action: received NO action attribs\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* n->nlmsg_flags & NLM_F_CREATE */
|
|
switch (n->nlmsg_type) {
|
|
case RTM_NEWACTION:
|
|
/* we are going to assume all other flags
|
|
* imply create only if it doesn't exist
|
|
* Note that CREATE | EXCL implies that
|
|
* but since we want avoid ambiguity (eg when flags
|
|
* is zero) then just set this
|
|
*/
|
|
if (n->nlmsg_flags & NLM_F_REPLACE)
|
|
ovr = 1;
|
|
replay:
|
|
ret = tcf_action_add(net, tca[TCA_ACT_TAB], n, portid, ovr);
|
|
if (ret == -EAGAIN)
|
|
goto replay;
|
|
break;
|
|
case RTM_DELACTION:
|
|
ret = tca_action_gd(net, tca[TCA_ACT_TAB], n,
|
|
portid, RTM_DELACTION);
|
|
break;
|
|
case RTM_GETACTION:
|
|
ret = tca_action_gd(net, tca[TCA_ACT_TAB], n,
|
|
portid, RTM_GETACTION);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct nlattr *find_dump_kind(struct nlattr **nla)
|
|
{
|
|
struct nlattr *tb1, *tb2[TCA_ACT_MAX + 1];
|
|
struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
|
|
struct nlattr *kind;
|
|
|
|
tb1 = nla[TCA_ACT_TAB];
|
|
if (tb1 == NULL)
|
|
return NULL;
|
|
|
|
if (nla_parse(tb, TCA_ACT_MAX_PRIO, nla_data(tb1),
|
|
NLMSG_ALIGN(nla_len(tb1)), NULL, NULL) < 0)
|
|
return NULL;
|
|
|
|
if (tb[1] == NULL)
|
|
return NULL;
|
|
if (nla_parse_nested(tb2, TCA_ACT_MAX, tb[1], NULL, NULL) < 0)
|
|
return NULL;
|
|
kind = tb2[TCA_ACT_KIND];
|
|
|
|
return kind;
|
|
}
|
|
|
|
static int tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct nlmsghdr *nlh;
|
|
unsigned char *b = skb_tail_pointer(skb);
|
|
struct nlattr *nest;
|
|
struct tc_action_ops *a_o;
|
|
int ret = 0;
|
|
struct tcamsg *t = (struct tcamsg *) nlmsg_data(cb->nlh);
|
|
struct nlattr *tb[TCA_ROOT_MAX + 1];
|
|
struct nlattr *count_attr = NULL;
|
|
unsigned long jiffy_since = 0;
|
|
struct nlattr *kind = NULL;
|
|
struct nla_bitfield32 bf;
|
|
u32 msecs_since = 0;
|
|
u32 act_count = 0;
|
|
|
|
ret = nlmsg_parse(cb->nlh, sizeof(struct tcamsg), tb, TCA_ROOT_MAX,
|
|
tcaa_policy, NULL);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
kind = find_dump_kind(tb);
|
|
if (kind == NULL) {
|
|
pr_info("tc_dump_action: action bad kind\n");
|
|
return 0;
|
|
}
|
|
|
|
a_o = tc_lookup_action(kind);
|
|
if (a_o == NULL)
|
|
return 0;
|
|
|
|
cb->args[2] = 0;
|
|
if (tb[TCA_ROOT_FLAGS]) {
|
|
bf = nla_get_bitfield32(tb[TCA_ROOT_FLAGS]);
|
|
cb->args[2] = bf.value;
|
|
}
|
|
|
|
if (tb[TCA_ROOT_TIME_DELTA]) {
|
|
msecs_since = nla_get_u32(tb[TCA_ROOT_TIME_DELTA]);
|
|
}
|
|
|
|
nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
|
|
cb->nlh->nlmsg_type, sizeof(*t), 0);
|
|
if (!nlh)
|
|
goto out_module_put;
|
|
|
|
if (msecs_since)
|
|
jiffy_since = jiffies - msecs_to_jiffies(msecs_since);
|
|
|
|
t = nlmsg_data(nlh);
|
|
t->tca_family = AF_UNSPEC;
|
|
t->tca__pad1 = 0;
|
|
t->tca__pad2 = 0;
|
|
cb->args[3] = jiffy_since;
|
|
count_attr = nla_reserve(skb, TCA_ROOT_COUNT, sizeof(u32));
|
|
if (!count_attr)
|
|
goto out_module_put;
|
|
|
|
nest = nla_nest_start(skb, TCA_ACT_TAB);
|
|
if (nest == NULL)
|
|
goto out_module_put;
|
|
|
|
ret = a_o->walk(net, skb, cb, RTM_GETACTION, a_o);
|
|
if (ret < 0)
|
|
goto out_module_put;
|
|
|
|
if (ret > 0) {
|
|
nla_nest_end(skb, nest);
|
|
ret = skb->len;
|
|
act_count = cb->args[1];
|
|
memcpy(nla_data(count_attr), &act_count, sizeof(u32));
|
|
cb->args[1] = 0;
|
|
} else
|
|
nlmsg_trim(skb, b);
|
|
|
|
nlh->nlmsg_len = skb_tail_pointer(skb) - b;
|
|
if (NETLINK_CB(cb->skb).portid && ret)
|
|
nlh->nlmsg_flags |= NLM_F_MULTI;
|
|
module_put(a_o->owner);
|
|
return skb->len;
|
|
|
|
out_module_put:
|
|
module_put(a_o->owner);
|
|
nlmsg_trim(skb, b);
|
|
return skb->len;
|
|
}
|
|
|
|
struct tcf_action_net {
|
|
struct rhashtable egdev_ht;
|
|
};
|
|
|
|
static unsigned int tcf_action_net_id;
|
|
|
|
struct tcf_action_egdev_cb {
|
|
struct list_head list;
|
|
tc_setup_cb_t *cb;
|
|
void *cb_priv;
|
|
};
|
|
|
|
struct tcf_action_egdev {
|
|
struct rhash_head ht_node;
|
|
const struct net_device *dev;
|
|
unsigned int refcnt;
|
|
struct list_head cb_list;
|
|
};
|
|
|
|
static const struct rhashtable_params tcf_action_egdev_ht_params = {
|
|
.key_offset = offsetof(struct tcf_action_egdev, dev),
|
|
.head_offset = offsetof(struct tcf_action_egdev, ht_node),
|
|
.key_len = sizeof(const struct net_device *),
|
|
};
|
|
|
|
static struct tcf_action_egdev *
|
|
tcf_action_egdev_lookup(const struct net_device *dev)
|
|
{
|
|
struct net *net = dev_net(dev);
|
|
struct tcf_action_net *tan = net_generic(net, tcf_action_net_id);
|
|
|
|
return rhashtable_lookup_fast(&tan->egdev_ht, &dev,
|
|
tcf_action_egdev_ht_params);
|
|
}
|
|
|
|
static struct tcf_action_egdev *
|
|
tcf_action_egdev_get(const struct net_device *dev)
|
|
{
|
|
struct tcf_action_egdev *egdev;
|
|
struct tcf_action_net *tan;
|
|
|
|
egdev = tcf_action_egdev_lookup(dev);
|
|
if (egdev)
|
|
goto inc_ref;
|
|
|
|
egdev = kzalloc(sizeof(*egdev), GFP_KERNEL);
|
|
if (!egdev)
|
|
return NULL;
|
|
INIT_LIST_HEAD(&egdev->cb_list);
|
|
egdev->dev = dev;
|
|
tan = net_generic(dev_net(dev), tcf_action_net_id);
|
|
rhashtable_insert_fast(&tan->egdev_ht, &egdev->ht_node,
|
|
tcf_action_egdev_ht_params);
|
|
|
|
inc_ref:
|
|
egdev->refcnt++;
|
|
return egdev;
|
|
}
|
|
|
|
static void tcf_action_egdev_put(struct tcf_action_egdev *egdev)
|
|
{
|
|
struct tcf_action_net *tan;
|
|
|
|
if (--egdev->refcnt)
|
|
return;
|
|
tan = net_generic(dev_net(egdev->dev), tcf_action_net_id);
|
|
rhashtable_remove_fast(&tan->egdev_ht, &egdev->ht_node,
|
|
tcf_action_egdev_ht_params);
|
|
kfree(egdev);
|
|
}
|
|
|
|
static struct tcf_action_egdev_cb *
|
|
tcf_action_egdev_cb_lookup(struct tcf_action_egdev *egdev,
|
|
tc_setup_cb_t *cb, void *cb_priv)
|
|
{
|
|
struct tcf_action_egdev_cb *egdev_cb;
|
|
|
|
list_for_each_entry(egdev_cb, &egdev->cb_list, list)
|
|
if (egdev_cb->cb == cb && egdev_cb->cb_priv == cb_priv)
|
|
return egdev_cb;
|
|
return NULL;
|
|
}
|
|
|
|
static int tcf_action_egdev_cb_call(struct tcf_action_egdev *egdev,
|
|
enum tc_setup_type type,
|
|
void *type_data, bool err_stop)
|
|
{
|
|
struct tcf_action_egdev_cb *egdev_cb;
|
|
int ok_count = 0;
|
|
int err;
|
|
|
|
list_for_each_entry(egdev_cb, &egdev->cb_list, list) {
|
|
err = egdev_cb->cb(type, type_data, egdev_cb->cb_priv);
|
|
if (err) {
|
|
if (err_stop)
|
|
return err;
|
|
} else {
|
|
ok_count++;
|
|
}
|
|
}
|
|
return ok_count;
|
|
}
|
|
|
|
static int tcf_action_egdev_cb_add(struct tcf_action_egdev *egdev,
|
|
tc_setup_cb_t *cb, void *cb_priv)
|
|
{
|
|
struct tcf_action_egdev_cb *egdev_cb;
|
|
|
|
egdev_cb = tcf_action_egdev_cb_lookup(egdev, cb, cb_priv);
|
|
if (WARN_ON(egdev_cb))
|
|
return -EEXIST;
|
|
egdev_cb = kzalloc(sizeof(*egdev_cb), GFP_KERNEL);
|
|
if (!egdev_cb)
|
|
return -ENOMEM;
|
|
egdev_cb->cb = cb;
|
|
egdev_cb->cb_priv = cb_priv;
|
|
list_add(&egdev_cb->list, &egdev->cb_list);
|
|
return 0;
|
|
}
|
|
|
|
static void tcf_action_egdev_cb_del(struct tcf_action_egdev *egdev,
|
|
tc_setup_cb_t *cb, void *cb_priv)
|
|
{
|
|
struct tcf_action_egdev_cb *egdev_cb;
|
|
|
|
egdev_cb = tcf_action_egdev_cb_lookup(egdev, cb, cb_priv);
|
|
if (WARN_ON(!egdev_cb))
|
|
return;
|
|
list_del(&egdev_cb->list);
|
|
kfree(egdev_cb);
|
|
}
|
|
|
|
static int __tc_setup_cb_egdev_register(const struct net_device *dev,
|
|
tc_setup_cb_t *cb, void *cb_priv)
|
|
{
|
|
struct tcf_action_egdev *egdev = tcf_action_egdev_get(dev);
|
|
int err;
|
|
|
|
if (!egdev)
|
|
return -ENOMEM;
|
|
err = tcf_action_egdev_cb_add(egdev, cb, cb_priv);
|
|
if (err)
|
|
goto err_cb_add;
|
|
return 0;
|
|
|
|
err_cb_add:
|
|
tcf_action_egdev_put(egdev);
|
|
return err;
|
|
}
|
|
int tc_setup_cb_egdev_register(const struct net_device *dev,
|
|
tc_setup_cb_t *cb, void *cb_priv)
|
|
{
|
|
int err;
|
|
|
|
rtnl_lock();
|
|
err = __tc_setup_cb_egdev_register(dev, cb, cb_priv);
|
|
rtnl_unlock();
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(tc_setup_cb_egdev_register);
|
|
|
|
static void __tc_setup_cb_egdev_unregister(const struct net_device *dev,
|
|
tc_setup_cb_t *cb, void *cb_priv)
|
|
{
|
|
struct tcf_action_egdev *egdev = tcf_action_egdev_lookup(dev);
|
|
|
|
if (WARN_ON(!egdev))
|
|
return;
|
|
tcf_action_egdev_cb_del(egdev, cb, cb_priv);
|
|
tcf_action_egdev_put(egdev);
|
|
}
|
|
void tc_setup_cb_egdev_unregister(const struct net_device *dev,
|
|
tc_setup_cb_t *cb, void *cb_priv)
|
|
{
|
|
rtnl_lock();
|
|
__tc_setup_cb_egdev_unregister(dev, cb, cb_priv);
|
|
rtnl_unlock();
|
|
}
|
|
EXPORT_SYMBOL_GPL(tc_setup_cb_egdev_unregister);
|
|
|
|
int tc_setup_cb_egdev_call(const struct net_device *dev,
|
|
enum tc_setup_type type, void *type_data,
|
|
bool err_stop)
|
|
{
|
|
struct tcf_action_egdev *egdev = tcf_action_egdev_lookup(dev);
|
|
|
|
if (!egdev)
|
|
return 0;
|
|
return tcf_action_egdev_cb_call(egdev, type, type_data, err_stop);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tc_setup_cb_egdev_call);
|
|
|
|
static __net_init int tcf_action_net_init(struct net *net)
|
|
{
|
|
struct tcf_action_net *tan = net_generic(net, tcf_action_net_id);
|
|
|
|
return rhashtable_init(&tan->egdev_ht, &tcf_action_egdev_ht_params);
|
|
}
|
|
|
|
static void __net_exit tcf_action_net_exit(struct net *net)
|
|
{
|
|
struct tcf_action_net *tan = net_generic(net, tcf_action_net_id);
|
|
|
|
rhashtable_destroy(&tan->egdev_ht);
|
|
}
|
|
|
|
static struct pernet_operations tcf_action_net_ops = {
|
|
.init = tcf_action_net_init,
|
|
.exit = tcf_action_net_exit,
|
|
.id = &tcf_action_net_id,
|
|
.size = sizeof(struct tcf_action_net),
|
|
};
|
|
|
|
static int __init tc_action_init(void)
|
|
{
|
|
int err;
|
|
|
|
err = register_pernet_subsys(&tcf_action_net_ops);
|
|
if (err)
|
|
return err;
|
|
|
|
rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL, 0);
|
|
rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL, 0);
|
|
rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action,
|
|
0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
subsys_initcall(tc_action_init);
|