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net_sched: get rid of struct tcf_common

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After the previous patch, struct tc_action should be enough
to represent the generic tc action, tcf_common is not necessary
any more. This patch gets rid of it to make tc action code
more readable.

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>
This commit is contained in:
WANG Cong 2016-07-25 16:09:42 -07:00 committed by David S. Miller
parent a85a970af2
commit ec0595cc44
15 changed files with 113 additions and 121 deletions
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61
include/net/act_api.h
View File

@ -22,42 +22,39 @@ struct tc_action_ops;
struct tc_action {
const struct tc_action_ops *ops;
__u32 type; /* for backward compat(TCA_OLD_COMPAT) */
__u32 order;
struct list_head list;
struct tcf_hashinfo *hinfo;
};
__u32 type; /* for backward compat(TCA_OLD_COMPAT) */
__u32 order;
struct list_head list;
struct tcf_hashinfo *hinfo;
struct tcf_common {
struct tc_action tcfc_act;
struct hlist_node tcfc_head;
u32 tcfc_index;
int tcfc_refcnt;
int tcfc_bindcnt;
u32 tcfc_capab;
int tcfc_action;
struct tcf_t tcfc_tm;
struct gnet_stats_basic_packed tcfc_bstats;
struct gnet_stats_queue tcfc_qstats;
struct gnet_stats_rate_est64 tcfc_rate_est;
spinlock_t tcfc_lock;
struct rcu_head tcfc_rcu;
struct hlist_node tcfa_head;
u32 tcfa_index;
int tcfa_refcnt;
int tcfa_bindcnt;
u32 tcfa_capab;
int tcfa_action;
struct tcf_t tcfa_tm;
struct gnet_stats_basic_packed tcfa_bstats;
struct gnet_stats_queue tcfa_qstats;
struct gnet_stats_rate_est64 tcfa_rate_est;
spinlock_t tcfa_lock;
struct rcu_head tcfa_rcu;
struct gnet_stats_basic_cpu __percpu *cpu_bstats;
struct gnet_stats_queue __percpu *cpu_qstats;
};
#define tcf_act common.tcfc_act
#define tcf_head common.tcfc_head
#define tcf_index common.tcfc_index
#define tcf_refcnt common.tcfc_refcnt
#define tcf_bindcnt common.tcfc_bindcnt
#define tcf_capab common.tcfc_capab
#define tcf_action common.tcfc_action
#define tcf_tm common.tcfc_tm
#define tcf_bstats common.tcfc_bstats
#define tcf_qstats common.tcfc_qstats
#define tcf_rate_est common.tcfc_rate_est
#define tcf_lock common.tcfc_lock
#define tcf_rcu common.tcfc_rcu
#define tcf_act common.tcfa_act
#define tcf_head common.tcfa_head
#define tcf_index common.tcfa_index
#define tcf_refcnt common.tcfa_refcnt
#define tcf_bindcnt common.tcfa_bindcnt
#define tcf_capab common.tcfa_capab
#define tcf_action common.tcfa_action
#define tcf_tm common.tcfa_tm
#define tcf_bstats common.tcfa_bstats
#define tcf_qstats common.tcfa_qstats
#define tcf_rate_est common.tcfa_rate_est
#define tcf_lock common.tcfa_lock
#define tcf_rcu common.tcfa_rcu
static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
{

2
include/net/tc_act/tc_bpf.h
View File

@ -14,7 +14,7 @@
#include <net/act_api.h>
struct tcf_bpf {
struct tcf_common common;
struct tc_action common;
struct bpf_prog __rcu *filter;
union {
u32 bpf_fd;

2
include/net/tc_act/tc_connmark.h
View File

@ -4,7 +4,7 @@
#include <net/act_api.h>
struct tcf_connmark_info {
struct tcf_common common;
struct tc_action common;
struct net *net;
u16 zone;
};

2
include/net/tc_act/tc_csum.h
View File

@ -5,7 +5,7 @@
#include <net/act_api.h>
struct tcf_csum {
struct tcf_common common;
struct tc_action common;
u32 update_flags;
};

2
include/net/tc_act/tc_defact.h
View File

@ -4,7 +4,7 @@
#include <net/act_api.h>
struct tcf_defact {
struct tcf_common common;
struct tc_action common;
u32 tcfd_datalen;
void *tcfd_defdata;
};

2
include/net/tc_act/tc_gact.h
View File

@ -5,7 +5,7 @@
#include <linux/tc_act/tc_gact.h>
struct tcf_gact {
struct tcf_common common;
struct tc_action common;
#ifdef CONFIG_GACT_PROB
u16 tcfg_ptype;
u16 tcfg_pval;

2
include/net/tc_act/tc_ife.h
View File

@ -8,7 +8,7 @@
#define IFE_METAHDRLEN 2
struct tcf_ife_info {
struct tcf_common common;
struct tc_action common;
u8 eth_dst[ETH_ALEN];
u8 eth_src[ETH_ALEN];
u16 eth_type;

2
include/net/tc_act/tc_ipt.h
View File

@ -6,7 +6,7 @@
struct xt_entry_target;
struct tcf_ipt {
struct tcf_common common;
struct tc_action common;
u32 tcfi_hook;
char *tcfi_tname;
struct xt_entry_target *tcfi_t;

2
include/net/tc_act/tc_mirred.h
View File

@ -5,7 +5,7 @@
#include <linux/tc_act/tc_mirred.h>
struct tcf_mirred {
struct tcf_common common;
struct tc_action common;
int tcfm_eaction;
int tcfm_ifindex;
int tcfm_ok_push;

2
include/net/tc_act/tc_nat.h
View File

@ -5,7 +5,7 @@
#include <net/act_api.h>
struct tcf_nat {
struct tcf_common common;
struct tc_action common;
__be32 old_addr;
__be32 new_addr;

2
include/net/tc_act/tc_pedit.h
View File

@ -4,7 +4,7 @@
#include <net/act_api.h>
struct tcf_pedit {
struct tcf_common common;
struct tc_action common;
unsigned char tcfp_nkeys;
unsigned char tcfp_flags;
struct tc_pedit_key *tcfp_keys;

2
include/net/tc_act/tc_skbedit.h
View File

@ -23,7 +23,7 @@
#include <linux/tc_act/tc_skbedit.h>
struct tcf_skbedit {
struct tcf_common common;
struct tc_action common;
u32 flags;
u32 priority;
u32 mark;

2
include/net/tc_act/tc_vlan.h
View File

@ -16,7 +16,7 @@
#define VLAN_F_PUSH 0x2
struct tcf_vlan {
struct tcf_common common;
struct tc_action common;
int tcfv_action;
u16 tcfv_push_vid;
__be16 tcfv_push_proto;

139
net/sched/act_api.c
View File

@ -29,46 +29,43 @@
static void free_tcf(struct rcu_head *head)
{
struct tcf_common *p = container_of(head, struct tcf_common, tcfc_rcu);
struct tc_action *p = container_of(head, struct tc_action, tcfa_rcu);
free_percpu(p->cpu_bstats);
free_percpu(p->cpu_qstats);
kfree(p);
}
static void tcf_hash_destroy(struct tcf_hashinfo *hinfo, struct tc_action *a)
static void tcf_hash_destroy(struct tcf_hashinfo *hinfo, struct tc_action *p)
{
struct tcf_common *p = (struct tcf_common *)a;
spin_lock_bh(&hinfo->lock);
hlist_del(&p->tcfc_head);
hlist_del(&p->tcfa_head);
spin_unlock_bh(&hinfo->lock);
gen_kill_estimator(&p->tcfc_bstats,
&p->tcfc_rate_est);
gen_kill_estimator(&p->tcfa_bstats,
&p->tcfa_rate_est);
/*
* gen_estimator est_timer() might access p->tcfc_lock
* gen_estimator est_timer() might access p->tcfa_lock
* or bstats, wait a RCU grace period before freeing p
*/
call_rcu(&p->tcfc_rcu, free_tcf);
call_rcu(&p->tcfa_rcu, free_tcf);
}
int __tcf_hash_release(struct tc_action *a, bool bind, bool strict)
int __tcf_hash_release(struct tc_action *p, bool bind, bool strict)
{
struct tcf_common *p = (struct tcf_common *)a;
int ret = 0;
if (p) {
if (bind)
p->tcfc_bindcnt--;
else if (strict && p->tcfc_bindcnt > 0)
p->tcfa_bindcnt--;
else if (strict && p->tcfa_bindcnt > 0)
return -EPERM;
p->tcfc_refcnt--;
if (p->tcfc_bindcnt <= 0 && p->tcfc_refcnt <= 0) {
if (a->ops->cleanup)
a->ops->cleanup(a, bind);
list_del(&a->list);
tcf_hash_destroy(a->hinfo, a);
p->tcfa_refcnt--;
if (p->tcfa_bindcnt <= 0 && p->tcfa_refcnt <= 0) {
if (p->ops->cleanup)
p->ops->cleanup(p, bind);
list_del(&p->list);
tcf_hash_destroy(p->hinfo, p);
ret = ACT_P_DELETED;
}
}
@ -89,11 +86,11 @@ static int tcf_dump_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb,
for (i = 0; i < (hinfo->hmask + 1); i++) {
struct hlist_head *head;
struct tcf_common *p;
struct tc_action *p;
head = &hinfo->htab[tcf_hash(i, hinfo->hmask)];
hlist_for_each_entry_rcu(p, head, tcfc_head) {
hlist_for_each_entry_rcu(p, head, tcfa_head) {
index++;
if (index < s_i)
continue;
@ -101,7 +98,7 @@ static int tcf_dump_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb,
nest = nla_nest_start(skb, n_i);
if (nest == NULL)
goto nla_put_failure;
err = tcf_action_dump_1(skb, (struct tc_action *)p, 0, 0);
err = tcf_action_dump_1(skb, p, 0, 0);
if (err < 0) {
index--;
nlmsg_trim(skb, nest);
@ -139,13 +136,13 @@ static int tcf_del_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb,
for (i = 0; i < (hinfo->hmask + 1); i++) {
struct hlist_head *head;
struct hlist_node *n;
struct tcf_common *p;
struct tc_action *p;
head = &hinfo->htab[tcf_hash(i, hinfo->hmask)];
hlist_for_each_entry_safe(p, n, head, tcfc_head) {
ret = __tcf_hash_release((struct tc_action *)p, false, true);
hlist_for_each_entry_safe(p, n, head, tcfa_head) {
ret = __tcf_hash_release(p, false, true);
if (ret == ACT_P_DELETED) {
module_put(p->tcfc_act.ops->owner);
module_put(p->ops->owner);
n_i++;
} else if (ret < 0)
goto nla_put_failure;
@ -178,15 +175,15 @@ int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
}
EXPORT_SYMBOL(tcf_generic_walker);
static struct tcf_common *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo)
static struct tc_action *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo)
{
struct tcf_common *p = NULL;
struct tc_action *p = NULL;
struct hlist_head *head;
spin_lock_bh(&hinfo->lock);
head = &hinfo->htab[tcf_hash(index, hinfo->hmask)];
hlist_for_each_entry_rcu(p, head, tcfc_head)
if (p->tcfc_index == index)
hlist_for_each_entry_rcu(p, head, tcfa_head)
if (p->tcfa_index == index)
break;
spin_unlock_bh(&hinfo->lock);
@ -211,10 +208,10 @@ EXPORT_SYMBOL(tcf_hash_new_index);
int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index)
{
struct tcf_hashinfo *hinfo = tn->hinfo;
struct tcf_common *p = tcf_hash_lookup(index, hinfo);
struct tc_action *p = tcf_hash_lookup(index, hinfo);
if (p) {
*a = &p->tcfc_act;
*a = p;
return 1;
}
return 0;
@ -225,12 +222,13 @@ bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
int bind)
{
struct tcf_hashinfo *hinfo = tn->hinfo;
struct tcf_common *p = NULL;
struct tc_action *p = NULL;
if (index && (p = tcf_hash_lookup(index, hinfo)) != NULL) {
if (bind)
p->tcfc_bindcnt++;
p->tcfc_refcnt++;
*a = &p->tcfc_act;
p->tcfa_bindcnt++;
p->tcfa_refcnt++;
*a = p;
return true;
}
return false;
@ -239,11 +237,10 @@ EXPORT_SYMBOL(tcf_hash_check);
void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est)
{
struct tcf_common *pc = (struct tcf_common *)a;
if (est)
gen_kill_estimator(&pc->tcfc_bstats,
&pc->tcfc_rate_est);
call_rcu(&pc->tcfc_rcu, free_tcf);
gen_kill_estimator(&a->tcfa_bstats,
&a->tcfa_rate_est);
call_rcu(&a->tcfa_rcu, free_tcf);
}
EXPORT_SYMBOL(tcf_hash_cleanup);
@ -251,15 +248,15 @@ int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
struct tc_action **a, const struct tc_action_ops *ops,
int bind, bool cpustats)
{
struct tcf_common *p = kzalloc(ops->size, GFP_KERNEL);
struct tc_action *p = kzalloc(ops->size, GFP_KERNEL);
struct tcf_hashinfo *hinfo = tn->hinfo;
int err = -ENOMEM;
if (unlikely(!p))
return -ENOMEM;
p->tcfc_refcnt = 1;
p->tcfa_refcnt = 1;
if (bind)
p->tcfc_bindcnt = 1;
p->tcfa_bindcnt = 1;
if (cpustats) {
p->cpu_bstats = netdev_alloc_pcpu_stats(struct gnet_stats_basic_cpu);
@ -275,38 +272,37 @@ int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
goto err1;
}
}
spin_lock_init(&p->tcfc_lock);
INIT_HLIST_NODE(&p->tcfc_head);
p->tcfc_index = index ? index : tcf_hash_new_index(tn);
p->tcfc_tm.install = jiffies;
p->tcfc_tm.lastuse = jiffies;
p->tcfc_tm.firstuse = 0;
spin_lock_init(&p->tcfa_lock);
INIT_HLIST_NODE(&p->tcfa_head);
p->tcfa_index = index ? index : tcf_hash_new_index(tn);
p->tcfa_tm.install = jiffies;
p->tcfa_tm.lastuse = jiffies;
p->tcfa_tm.firstuse = 0;
if (est) {
err = gen_new_estimator(&p->tcfc_bstats, p->cpu_bstats,
&p->tcfc_rate_est,
&p->tcfc_lock, NULL, est);
err = gen_new_estimator(&p->tcfa_bstats, p->cpu_bstats,
&p->tcfa_rate_est,
&p->tcfa_lock, NULL, est);
if (err) {
free_percpu(p->cpu_qstats);
goto err2;
}
}
p->tcfc_act.hinfo = hinfo;
p->tcfc_act.ops = ops;
INIT_LIST_HEAD(&p->tcfc_act.list);
*a = &p->tcfc_act;
p->hinfo = hinfo;
p->ops = ops;
INIT_LIST_HEAD(&p->list);
*a = p;
return 0;
}
EXPORT_SYMBOL(tcf_hash_create);
void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a)
{
struct tcf_common *p = (struct tcf_common *)a;
struct tcf_hashinfo *hinfo = tn->hinfo;
unsigned int h = tcf_hash(p->tcfc_index, hinfo->hmask);
unsigned int h = tcf_hash(a->tcfa_index, hinfo->hmask);
spin_lock_bh(&hinfo->lock);
hlist_add_head(&p->tcfc_head, &hinfo->htab[h]);
hlist_add_head(&a->tcfa_head, &hinfo->htab[h]);
spin_unlock_bh(&hinfo->lock);
}
EXPORT_SYMBOL(tcf_hash_insert);
@ -317,13 +313,13 @@ void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
int i;
for (i = 0; i < hinfo->hmask + 1; i++) {
struct tcf_common *p;
struct tc_action *p;
struct hlist_node *n;
hlist_for_each_entry_safe(p, n, &hinfo->htab[i], tcfc_head) {
hlist_for_each_entry_safe(p, n, &hinfo->htab[i], tcfa_head) {
int ret;
ret = __tcf_hash_release((struct tc_action *)p, false, true);
ret = __tcf_hash_release(p, false, true);
if (ret == ACT_P_DELETED)
module_put(ops->owner);
else if (ret < 0)
@ -625,12 +621,11 @@ int tcf_action_init(struct net *net, struct nlattr *nla,
return err;
}
int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a,
int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *p,
int compat_mode)
{
int err = 0;
struct gnet_dump d;
struct tcf_common *p = (struct tcf_common *)a;
if (p == NULL)
goto errout;
@ -639,27 +634,27 @@ int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a,
* to add additional backward compatibility statistic TLVs.
*/
if (compat_mode) {
if (a->type == TCA_OLD_COMPAT)
if (p->type == TCA_OLD_COMPAT)
err = gnet_stats_start_copy_compat(skb, 0,
TCA_STATS,
TCA_XSTATS,
&p->tcfc_lock, &d,
&p->tcfa_lock, &d,
TCA_PAD);
else
return 0;
} else
err = gnet_stats_start_copy(skb, TCA_ACT_STATS,
&p->tcfc_lock, &d, TCA_ACT_PAD);
&p->tcfa_lock, &d, TCA_ACT_PAD);
if (err < 0)
goto errout;
if (gnet_stats_copy_basic(NULL, &d, p->cpu_bstats, &p->tcfc_bstats) < 0 ||
gnet_stats_copy_rate_est(&d, &p->tcfc_bstats,
&p->tcfc_rate_est) < 0 ||
if (gnet_stats_copy_basic(NULL, &d, p->cpu_bstats, &p->tcfa_bstats) < 0 ||
gnet_stats_copy_rate_est(&d, &p->tcfa_bstats,
&p->tcfa_rate_est) < 0 ||
gnet_stats_copy_queue(&d, p->cpu_qstats,
&p->tcfc_qstats,
p->tcfc_qstats.qlen) < 0)
&p->tcfa_qstats,
p->tcfa_qstats.qlen) < 0)
goto errout;
if (gnet_stats_finish_copy(&d) < 0)

10
net/sched/act_police.c
View File

@ -23,7 +23,7 @@
#include <net/netlink.h>
struct tcf_police {
struct tcf_common common;
struct tc_action common;
int tcfp_result;
u32 tcfp_ewma_rate;
s64 tcfp_burst;
@ -73,11 +73,11 @@ static int tcf_act_police_walker(struct net *net, struct sk_buff *skb,
for (i = 0; i < (POL_TAB_MASK + 1); i++) {
struct hlist_head *head;
struct tcf_common *p;
struct tc_action *p;
head = &hinfo->htab[tcf_hash(i, POL_TAB_MASK)];
hlist_for_each_entry_rcu(p, head, tcfc_head) {
hlist_for_each_entry_rcu(p, head, tcfa_head) {
index++;
if (index < s_i)
continue;
@ -85,9 +85,9 @@ static int tcf_act_police_walker(struct net *net, struct sk_buff *skb,
if (nest == NULL)
goto nla_put_failure;
if (type == RTM_DELACTION)
err = tcf_action_dump_1(skb, (struct tc_action *)p, 0, 1);
err = tcf_action_dump_1(skb, p, 0, 1);
else
err = tcf_action_dump_1(skb, (struct tc_action *)p, 0, 0);
err = tcf_action_dump_1(skb, p, 0, 0);
if (err < 0) {
index--;
nla_nest_cancel(skb, nest);