serial: fix enable_irq_wake/disable_irq_wake imbalance in serial_core.c

[linux-2.6-omap-h63xx.git] / net / netfilter / nf_conntrack_extend.c

diff --git a/net/netfilter/nf_conntrack_extend.c b/net/netfilter/nf_conntrack_extend.c
index cf6ba6659a8080938b3aaaa44c6ef46d0a47ad72..bcc19fa4ed1e07ab4277f7c02c933235cd0dc261 100644 (file)
--- 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 @@ EXPORT_SYMBOL(__nf_ct_ext_destroy);
 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 @@ nf_ct_ext_create(struct nf_ct_ext **ext, enum nf_ct_ext_id id, gfp_t gfp)
        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;
 }
@@ -81,6 +71,9 @@ void *__nf_ct_ext_add(struct nf_conn *ct, enum nf_ct_ext_id id, gfp_t gfp)
        int i, newlen, newoff;
        struct nf_ct_ext_type *t;
 
+       /* Conntrack must not be confirmed to avoid races on reallocation. */
+       NF_CT_ASSERT(!nf_ct_is_confirmed(ct));
+
        if (!ct->ext)
                return nf_ct_ext_create(&ct->ext, id, gfp);
 
@@ -95,7 +88,7 @@ void *__nf_ct_ext_add(struct nf_conn *ct, enum nf_ct_ext_id id, gfp_t gfp)
        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;
@@ -109,11 +102,11 @@ void *__nf_ct_ext_add(struct nf_conn *ct, enum nf_ct_ext_id id, gfp_t gfp)
                        rcu_read_lock();
                        t = rcu_dereference(nf_ct_ext_types[i]);
                        if (t && t->move)
-                               t->move(ct, ct->ext + ct->ext->offset[i]);
+                               t->move((void *)new + new->offset[i],
+                                       (void *)ct->ext + ct->ext->offset[i]);
                        rcu_read_unlock();
                }
                kfree(ct->ext);
-               new->real_len = newlen;
                ct->ext = new;
        }
 
@@ -155,8 +148,6 @@ static void update_alloc_size(struct nf_ct_ext_type *type)
                        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;
        }
 }