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[DCCP] ackvec: Introduce dccp_ackvec_slab 

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo 2006-03-20 17:16:17 -08:00 committed by David S. Miller
parent fa23e2ecd3
commit 9b07ef5dda
3 changed files with 52 additions and 3 deletions
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34
net/dccp/ackvec.c
View File

@ -13,10 +13,16 @@
#include "dccp.h"
#include <linux/dccp.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <net/sock.h>
static kmem_cache_t *dccp_ackvec_slab;
int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb)
{
struct dccp_sock *dp = dccp_sk(sk);
@ -96,7 +102,7 @@ int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb)
struct dccp_ackvec *dccp_ackvec_alloc(const gfp_t priority)
{
struct dccp_ackvec *av = kmalloc(sizeof(*av), priority);
struct dccp_ackvec *av = kmem_cache_alloc(dccp_ackvec_slab, priority);
if (av != NULL) {
av->dccpav_buf_head =
@ -115,7 +121,7 @@ struct dccp_ackvec *dccp_ackvec_alloc(const gfp_t priority)
void dccp_ackvec_free(struct dccp_ackvec *av)
{
kfree(av);
kmem_cache_free(dccp_ackvec_slab, av);
}
static inline u8 dccp_ackvec_state(const struct dccp_ackvec *av,
@ -420,3 +426,27 @@ int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb,
len, value);
return 0;
}
static char dccp_ackvec_slab_msg[] __initdata =
KERN_CRIT "DCCP: Unable to create ack vectors slab cache\n";
int __init dccp_ackvec_init(void)
{
dccp_ackvec_slab = kmem_cache_create("dccp_ackvec",
sizeof(struct dccp_ackvec), 0,
SLAB_HWCACHE_ALIGN, NULL, NULL);
if (dccp_ackvec_slab == NULL) {
printk(dccp_ackvec_slab_msg);
return -ENOBUFS;
}
return 0;
}
void dccp_ackvec_exit(void)
{
if (dccp_ackvec_slab != NULL) {
kmem_cache_destroy(dccp_ackvec_slab);
dccp_ackvec_slab = NULL;
}
}

12
net/dccp/ackvec.h
View File

@ -71,6 +71,9 @@ struct sock;
struct sk_buff;
#ifdef CONFIG_IP_DCCP_ACKVEC
extern int dccp_ackvec_init(void);
extern void dccp_ackvec_exit(void);
extern struct dccp_ackvec *dccp_ackvec_alloc(const gfp_t priority);
extern void dccp_ackvec_free(struct dccp_ackvec *av);
@ -89,6 +92,15 @@ static inline int dccp_ackvec_pending(const struct dccp_ackvec *av)
return av->dccpav_sent_len != av->dccpav_vec_len;
}
#else /* CONFIG_IP_DCCP_ACKVEC */
static inline int dccp_ackvec_init(void)
{
return 0;
}
static inline void dccp_ackvec_exit(void)
{
}
static inline struct dccp_ackvec *dccp_ackvec_alloc(const gfp_t priority)
{
return NULL;

9
net/dccp/proto.c
View File

@ -877,11 +877,17 @@ static int __init dccp_init(void)
inet_register_protosw(&dccp_v4_protosw);
rc = dccp_ctl_sock_init();
rc = dccp_ackvec_init();
if (rc)
goto out_unregister_protosw;
rc = dccp_ctl_sock_init();
if (rc)
goto out_ackvec_exit;
out:
return rc;
out_ackvec_exit:
dccp_ackvec_exit();
out_unregister_protosw:
inet_unregister_protosw(&dccp_v4_protosw);
inet_del_protocol(&dccp_protocol, IPPROTO_DCCP);
@ -923,6 +929,7 @@ static void __exit dccp_fini(void)
sizeof(struct inet_ehash_bucket)));
kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep);
proto_unregister(&dccp_prot);
dccp_ackvec_exit();
}
module_init(dccp_init);