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Commit d4ad4d22 authored by Nikolay Aleksandrov's avatar Nikolay Aleksandrov Committed by David S. Miller
Browse files

inet: frags: use kmem_cache for inet_frag_queue 



Use kmem_cache to allocate/free inet_frag_queue objects since they're
all the same size per inet_frags user and are alloced/freed in high volumes
thus making it a perfect case for kmem_cache.

Signed-off-by: default avatarNikolay Aleksandrov <nikolay@redhat.com>
Acked-by: default avatarFlorian Westphal <fw@strlen.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2e404f63

include/net/inet_frag.h

+3 −1
Original line number Diff line number Diff line
@@ -101,9 +101,11 @@ struct inet_frags { 
	void			(*destructor)(struct inet_frag_queue *);

	void			(*skb_free)(struct sk_buff *);

	void			(*frag_expire)(unsigned long data);

	struct kmem_cache	*frags_cachep;

	const char		*frags_cache_name;

};



void inet_frags_init(struct inet_frags *);

int inet_frags_init(struct inet_frags *);

void inet_frags_fini(struct inet_frags *);



void inet_frags_init_net(struct netns_frags *nf);

net/ieee802154/reassembly.c

+6 −1
Original line number Diff line number Diff line
@@ -30,6 +30,8 @@ 


#include "reassembly.h"



static const char lowpan_frags_cache_name[] = "lowpan-frags";



struct lowpan_frag_info {

	__be16 d_tag;

	u16 d_size;
@@ -571,7 +573,10 @@ int __init lowpan_net_frag_init(void) 
	lowpan_frags.qsize = sizeof(struct frag_queue);

	lowpan_frags.match = lowpan_frag_match;

	lowpan_frags.frag_expire = lowpan_frag_expire;

	inet_frags_init(&lowpan_frags);

	lowpan_frags.frags_cache_name = lowpan_frags_cache_name;

	ret = inet_frags_init(&lowpan_frags);

	if (ret)

		goto err_pernet;



	return ret;

err_pernet:

net/ipv4/inet_fragment.c

+10 −3
Original line number Diff line number Diff line
@@ -198,7 +198,7 @@ static void inet_frag_schedule_worker(struct inet_frags *f) 
		schedule_work(&f->frags_work);

}



void inet_frags_init(struct inet_frags *f)

int inet_frags_init(struct inet_frags *f)

{

	int i;
@@ -213,6 +213,12 @@ void inet_frags_init(struct inet_frags *f) 


	seqlock_init(&f->rnd_seqlock);

	f->last_rebuild_jiffies = 0;

	f->frags_cachep = kmem_cache_create(f->frags_cache_name, f->qsize, 0, 0,

					    NULL);

	if (!f->frags_cachep)

		return -ENOMEM;



	return 0;

}

EXPORT_SYMBOL(inet_frags_init);
@@ -225,6 +231,7 @@ EXPORT_SYMBOL(inet_frags_init_net); 
void inet_frags_fini(struct inet_frags *f)

{

	cancel_work_sync(&f->frags_work);

	kmem_cache_destroy(f->frags_cachep);

}

EXPORT_SYMBOL(inet_frags_fini);
@@ -327,7 +334,7 @@ void inet_frag_destroy(struct inet_frag_queue *q, struct inet_frags *f) 


	if (f->destructor)

		f->destructor(q);

	kfree(q);

	kmem_cache_free(f->frags_cachep, q);

}

EXPORT_SYMBOL(inet_frag_destroy);
@@ -377,7 +384,7 @@ static struct inet_frag_queue *inet_frag_alloc(struct netns_frags *nf, 
		return NULL;

	}



	q = kzalloc(f->qsize, GFP_ATOMIC);

	q = kmem_cache_zalloc(f->frags_cachep, GFP_ATOMIC);

	if (q == NULL)

		return NULL;

net/ipv4/ip_fragment.c

+4 −1
Original line number Diff line number Diff line
@@ -55,6 +55,7 @@ 
 */



static int sysctl_ipfrag_max_dist __read_mostly = 64;

static const char ip_frag_cache_name[] = "ip4-frags";



struct ipfrag_skb_cb

{
@@ -860,5 +861,7 @@ void __init ipfrag_init(void) 
	ip4_frags.qsize = sizeof(struct ipq);

	ip4_frags.match = ip4_frag_match;

	ip4_frags.frag_expire = ip_expire;

	inet_frags_init(&ip4_frags);

	ip4_frags.frags_cache_name = ip_frag_cache_name;

	if (inet_frags_init(&ip4_frags))

		panic("IP: failed to allocate ip4_frags cache\n");

}

net/ipv6/netfilter/nf_conntrack_reasm.c

+6 −2
Original line number Diff line number Diff line
@@ -50,6 +50,7 @@ 
#include <linux/module.h>

#include <net/netfilter/ipv6/nf_defrag_ipv6.h>



static const char nf_frags_cache_name[] = "nf-frags";



struct nf_ct_frag6_skb_cb

{
@@ -677,12 +678,15 @@ int nf_ct_frag6_init(void) 
	nf_frags.qsize = sizeof(struct frag_queue);

	nf_frags.match = ip6_frag_match;

	nf_frags.frag_expire = nf_ct_frag6_expire;

	inet_frags_init(&nf_frags);



	nf_frags.frags_cache_name = nf_frags_cache_name;

	ret = inet_frags_init(&nf_frags);

	if (ret)

		goto out;

	ret = register_pernet_subsys(&nf_ct_net_ops);

	if (ret)

		inet_frags_fini(&nf_frags);



out:

	return ret;

}