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Eliminate two duplicated lines codes to enhance the xt_hashlimit.c of ne... #128

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Eliminate two duplicated lines codes to enhance the xt_hashlimit.c of ne... #128

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Eliminate two duplicated lines codes to enhance the xt_hashlimit.c of…
gfreewind Oct 24, 2014
a392824
Merge branch 'master' of github.com:torvalds/linux
gfreewind Nov 20, 2014
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20 changes: 9 additions & 11 deletions net/netfilter/xt_hashlimit.c
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Original file line number Diff line number Diff line change
Expand Up @@ -158,7 +158,7 @@ dsthash_find(const struct xt_hashlimit_htable *ht,
/* allocate dsthash_ent, initialize dst, put in htable and lock it */
static struct dsthash_ent *
dsthash_alloc_init(struct xt_hashlimit_htable *ht,
const struct dsthash_dst *dst, bool *race)
const struct dsthash_dst *dst, bool *new)
{
struct dsthash_ent *ent;

Expand All @@ -170,7 +170,6 @@ dsthash_alloc_init(struct xt_hashlimit_htable *ht,
ent = dsthash_find(ht, dst);
if (ent != NULL) {
spin_unlock(&ht->lock);
*race = true;
return ent;
}

Expand All @@ -194,6 +193,7 @@ dsthash_alloc_init(struct xt_hashlimit_htable *ht,
spin_lock(&ent->lock);
hlist_add_head_rcu(&ent->node, &ht->hash[hash_dst(ht, dst)]);
ht->count++;
*new = true;
}
spin_unlock(&ht->lock);
return ent;
Expand Down Expand Up @@ -610,7 +610,7 @@ hashlimit_mt(const struct sk_buff *skb, struct xt_action_param *par)
unsigned long now = jiffies;
struct dsthash_ent *dh;
struct dsthash_dst dst;
bool race = false;
bool new = false;
u32 cost;

if (hashlimit_init_dst(hinfo, &dst, skb, par->thoff) < 0)
Expand All @@ -619,18 +619,16 @@ hashlimit_mt(const struct sk_buff *skb, struct xt_action_param *par)
rcu_read_lock_bh();
dh = dsthash_find(hinfo, &dst);
if (dh == NULL) {
dh = dsthash_alloc_init(hinfo, &dst, &race);
dh = dsthash_alloc_init(hinfo, &dst, &new);
if (dh == NULL) {
rcu_read_unlock_bh();
goto hotdrop;
} else if (race) {
/* Already got an entry, update expiration timeout */
dh->expires = now + msecs_to_jiffies(hinfo->cfg.expire);
rateinfo_recalc(dh, now, hinfo->cfg.mode);
} else {
dh->expires = jiffies + msecs_to_jiffies(hinfo->cfg.expire);
rateinfo_init(dh, hinfo);
}
}

if (unlikely(new)) {
dh->expires = jiffies + msecs_to_jiffies(hinfo->cfg.expire);
rateinfo_init(dh, hinfo);
} else {
/* update expiration timeout */
dh->expires = now + msecs_to_jiffies(hinfo->cfg.expire);
Expand Down