[NETFILTER]: nf_conntrack: replace horrible hack with ksize()
There's a horrible slab abuse in net/netfilter/nf_conntrack_extend.c
that can be replaced with a call to ksize().
Cc: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/netfilter/nf_conntrack_extend.h b/include/net/netfilter/nf_conntrack_extend.h
index 49aac63..f736e84 100644
--- a/include/net/netfilter/nf_conntrack_extend.h
+++ b/include/net/netfilter/nf_conntrack_extend.h
@@ -17,7 +17,6 @@
struct nf_ct_ext {
u8 offset[NF_CT_EXT_NUM];
u8 len;
- u8 real_len;
char data[0];
};
diff --git a/net/netfilter/nf_conntrack_extend.c b/net/netfilter/nf_conntrack_extend.c
index 8b9be1e..2bd9963 100644
--- a/net/netfilter/nf_conntrack_extend.c
+++ b/net/netfilter/nf_conntrack_extend.c
@@ -19,14 +19,6 @@
static struct nf_ct_ext_type *nf_ct_ext_types[NF_CT_EXT_NUM];
static DEFINE_MUTEX(nf_ct_ext_type_mutex);
-/* Horrible trick to figure out smallest amount worth kmallocing. */
-#define CACHE(x) (x) + 0 *
-enum {
- NF_CT_EXT_MIN_SIZE =
-#include <linux/kmalloc_sizes.h>
- 1 };
-#undef CACHE
-
void __nf_ct_ext_destroy(struct nf_conn *ct)
{
unsigned int i;
@@ -53,7 +45,7 @@
static void *
nf_ct_ext_create(struct nf_ct_ext **ext, enum nf_ct_ext_id id, gfp_t gfp)
{
- unsigned int off, len, real_len;
+ unsigned int off, len;
struct nf_ct_ext_type *t;
rcu_read_lock();
@@ -61,16 +53,14 @@
BUG_ON(t == NULL);
off = ALIGN(sizeof(struct nf_ct_ext), t->align);
len = off + t->len;
- real_len = t->alloc_size;
rcu_read_unlock();
- *ext = kzalloc(real_len, gfp);
+ *ext = kzalloc(t->alloc_size, gfp);
if (!*ext)
return NULL;
(*ext)->offset[id] = off;
(*ext)->len = len;
- (*ext)->real_len = real_len;
return (void *)(*ext) + off;
}
@@ -95,7 +85,7 @@
newlen = newoff + t->len;
rcu_read_unlock();
- if (newlen >= ct->ext->real_len) {
+ if (newlen >= ksize(ct->ext)) {
new = kmalloc(newlen, gfp);
if (!new)
return NULL;
@@ -114,7 +104,6 @@
rcu_read_unlock();
}
kfree(ct->ext);
- new->real_len = newlen;
ct->ext = new;
}
@@ -156,8 +145,6 @@
t1->alloc_size = ALIGN(t1->alloc_size, t2->align)
+ t2->len;
}
- if (t1->alloc_size < NF_CT_EXT_MIN_SIZE)
- t1->alloc_size = NF_CT_EXT_MIN_SIZE;
}
}