net_sched: act: move idx_gen into struct tcf_hashinfo

There is no need to store the index separatedly
since tcf_hashinfo is allocated statically too.

Cc: Jamal Hadi Salim <[e-mail]>
Cc: David S. Miller <[e-mail]>
Signed-off-by: Cong Wang <[e-mail]>
Signed-off-by: Jamal Hadi Salim <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

include/net/act_api.h

···
 	struct hlist_head	*htab;
 	unsigned int		hmask;
 	spinlock_t		lock;
+	u32			index;
 };
 
 static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
···
 	int i;
 
 	spin_lock_init(&hf->lock);
+	hf->index = 0;
 	hf->hmask = mask;
 	hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
 			   GFP_KERNEL);
···
 void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo);
 int tcf_hash_release(struct tcf_common *p, int bind,
 		     struct tcf_hashinfo *hinfo);
-u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo);
+u32 tcf_hash_new_index(struct tcf_hashinfo *hinfo);
 struct tcf_common *tcf_hash_check(u32 index, struct tc_action *a,
 				  int bind, struct tcf_hashinfo *hinfo);
 struct tcf_common *tcf_hash_create(u32 index, struct nlattr *est,
 				   struct tc_action *a, int size,
-				   int bind, u32 *idx_gen,
-				   struct tcf_hashinfo *hinfo);
+				   int bind, struct tcf_hashinfo *hinfo);
 void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo);
 
 int tcf_register_action(struct tc_action_ops *a);

net/sched/act_api.c

···
 }
 EXPORT_SYMBOL(tcf_hash_lookup);
 
-u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo)
+u32 tcf_hash_new_index(struct tcf_hashinfo *hinfo)
 {
-	u32 val = *idx_gen;
+	u32 val = hinfo->index;
 
 	do {
 		if (++val == 0)
 			val = 1;
 	} while (tcf_hash_lookup(val, hinfo));
 
-	*idx_gen = val;
+	hinfo->index = val;
 	return val;
 }
 EXPORT_SYMBOL(tcf_hash_new_index);
···
 
 struct tcf_common *tcf_hash_create(u32 index, struct nlattr *est,
 				   struct tc_action *a, int size, int bind,
-				   u32 *idx_gen, struct tcf_hashinfo *hinfo)
+				   struct tcf_hashinfo *hinfo)
 {
 	struct tcf_common *p = kzalloc(size, GFP_KERNEL);
 
···
 
 	spin_lock_init(&p->tcfc_lock);
 	INIT_HLIST_NODE(&p->tcfc_head);
-	p->tcfc_index = index ? index : tcf_hash_new_index(idx_gen, hinfo);
+	p->tcfc_index = index ? index : tcf_hash_new_index(hinfo);
 	p->tcfc_tm.install = jiffies;
 	p->tcfc_tm.lastuse = jiffies;
 	if (est) {

net/sched/act_csum.c

···
 #include <net/tc_act/tc_csum.h>
 
 #define CSUM_TAB_MASK 15
-static u32 csum_idx_gen;
 static struct tcf_hashinfo csum_hash_info;
 
 static const struct nla_policy csum_policy[TCA_CSUM_MAX + 1] = {
···
 	pc = tcf_hash_check(parm->index, a, bind, &csum_hash_info);
 	if (!pc) {
 		pc = tcf_hash_create(parm->index, est, a, sizeof(*p), bind,
-				     &csum_idx_gen, &csum_hash_info);
+				     &csum_hash_info);
 		if (IS_ERR(pc))
 			return PTR_ERR(pc);
 		ret = ACT_P_CREATED;

net/sched/act_gact.c

···
 #include <net/tc_act/tc_gact.h>
 
 #define GACT_TAB_MASK	15
-static u32 gact_idx_gen;
 static struct tcf_hashinfo gact_hash_info;
 
 #ifdef CONFIG_GACT_PROB
···
 	pc = tcf_hash_check(parm->index, a, bind, &gact_hash_info);
 	if (!pc) {
 		pc = tcf_hash_create(parm->index, est, a, sizeof(*gact),
-				     bind, &gact_idx_gen, &gact_hash_info);
+				     bind, &gact_hash_info);
 		if (IS_ERR(pc))
 			return PTR_ERR(pc);
 		ret = ACT_P_CREATED;

net/sched/act_ipt.c

···
 
 
 #define IPT_TAB_MASK     15
-static u32 ipt_idx_gen;
 static struct tcf_hashinfo ipt_hash_info;
 
 static int ipt_init_target(struct xt_entry_target *t, char *table, unsigned int hook)
···
 	pc = tcf_hash_check(index, a, bind, &ipt_hash_info);
 	if (!pc) {
 		pc = tcf_hash_create(index, est, a, sizeof(*ipt), bind,
-				     &ipt_idx_gen, &ipt_hash_info);
+				     &ipt_hash_info);
 		if (IS_ERR(pc))
 			return PTR_ERR(pc);
 		ret = ACT_P_CREATED;

net/sched/act_mirred.c

···
 #include <linux/if_arp.h>
 
 #define MIRRED_TAB_MASK     7
-static u32 mirred_idx_gen;
 static LIST_HEAD(mirred_list);
 static struct tcf_hashinfo mirred_hash_info;
 
···
 		if (dev == NULL)
 			return -EINVAL;
 		pc = tcf_hash_create(parm->index, est, a, sizeof(*m), bind,
-				     &mirred_idx_gen, &mirred_hash_info);
+				     &mirred_hash_info);
 		if (IS_ERR(pc))
 			return PTR_ERR(pc);
 		ret = ACT_P_CREATED;

net/sched/act_nat.c

···
 
 
 #define NAT_TAB_MASK	15
-static u32 nat_idx_gen;
 
 static struct tcf_hashinfo nat_hash_info;
 
···
 	pc = tcf_hash_check(parm->index, a, bind, &nat_hash_info);
 	if (!pc) {
 		pc = tcf_hash_create(parm->index, est, a, sizeof(*p), bind,
-				     &nat_idx_gen, &nat_hash_info);
+				     &nat_hash_info);
 		if (IS_ERR(pc))
 			return PTR_ERR(pc);
 		ret = ACT_P_CREATED;

net/sched/act_pedit.c

···
 #include <net/tc_act/tc_pedit.h>
 
 #define PEDIT_TAB_MASK	15
-static u32 pedit_idx_gen;
 
 static struct tcf_hashinfo pedit_hash_info;
 
···
 		if (!parm->nkeys)
 			return -EINVAL;
 		pc = tcf_hash_create(parm->index, est, a, sizeof(*p), bind,
-				     &pedit_idx_gen, &pedit_hash_info);
+				     &pedit_hash_info);
 		if (IS_ERR(pc))
 			return PTR_ERR(pc);
 		p = to_pedit(pc);

net/sched/act_police.c

···
 	container_of(pc, struct tcf_police, common)
 
 #define POL_TAB_MASK     15
-static u32 police_idx_gen;
 static struct tcf_hashinfo police_hash_info;
 
 /* old policer structure from before tc actions */
···
 
 	police->tcfp_t_c = ktime_to_ns(ktime_get());
 	police->tcf_index = parm->index ? parm->index :
-		tcf_hash_new_index(&police_idx_gen, &police_hash_info);
+		tcf_hash_new_index(&police_hash_info);
 	h = tcf_hash(police->tcf_index, POL_TAB_MASK);
 	spin_lock_bh(&police_hash_info.lock);
 	hlist_add_head(&police->tcf_head, &police_hash_info.htab[h]);

net/sched/act_simple.c

···
 #include <net/tc_act/tc_defact.h>
 
 #define SIMP_TAB_MASK     7
-static u32 simp_idx_gen;
 static struct tcf_hashinfo simp_hash_info;
 
 #define SIMP_MAX_DATA	32
···
 	pc = tcf_hash_check(parm->index, a, bind, &simp_hash_info);
 	if (!pc) {
 		pc = tcf_hash_create(parm->index, est, a, sizeof(*d), bind,
-				     &simp_idx_gen, &simp_hash_info);
+				     &simp_hash_info);
 		if (IS_ERR(pc))
 			return PTR_ERR(pc);
 

net/sched/act_skbedit.c

···
 #include <net/tc_act/tc_skbedit.h>
 
 #define SKBEDIT_TAB_MASK     15
-static u32 skbedit_idx_gen;
 static struct tcf_hashinfo skbedit_hash_info;
 
 static int tcf_skbedit(struct sk_buff *skb, const struct tc_action *a,
···
 	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);
+				     &skbedit_hash_info);
 		if (IS_ERR(pc))
 			return PTR_ERR(pc);