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netfilter: nf_conntrack: use is_vmalloc_addr()

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Use is_vmalloc_addr() in nf_ct_free_hashtable() and get rid of
the vmalloc flags to indicate that a hash table has been allocated
using vmalloc().

Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Patrick McHardy 2011-01-14 15:45:56 +01:00
parent 0134e89c7b
commit d862a6622e
7 changed files with 19 additions and 39 deletions
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4
include/net/netfilter/nf_conntrack.h
View File

@ -202,9 +202,9 @@ extern void nf_ct_l3proto_module_put(unsigned short l3proto);
* Allocate a hashtable of hlist_head (if nulls == 0),
* or hlist_nulls_head (if nulls == 1)
*/
extern void *nf_ct_alloc_hashtable(unsigned int *sizep, int *vmalloced, int nulls);
extern void *nf_ct_alloc_hashtable(unsigned int *sizep, int nulls);
extern void nf_ct_free_hashtable(void *hash, int vmalloced, unsigned int size);
extern void nf_ct_free_hashtable(void *hash, unsigned int size);
extern struct nf_conntrack_tuple_hash *
__nf_conntrack_find(struct net *net, u16 zone,

2
include/net/netns/conntrack.h
View File

@ -28,8 +28,6 @@ struct netns_ct {
struct ctl_table_header *acct_sysctl_header;
struct ctl_table_header *event_sysctl_header;
#endif
int hash_vmalloc;
int expect_vmalloc;
char *slabname;
};
#endif

1
include/net/netns/ipv4.h
View File

@ -43,7 +43,6 @@ struct netns_ipv4 {
struct xt_table *nat_table;
struct hlist_head *nat_bysource;
unsigned int nat_htable_size;
int nat_vmalloced;
#endif
int sysctl_icmp_echo_ignore_all;

6
net/ipv4/netfilter/nf_nat_core.c
View File

@ -682,8 +682,7 @@ static int __net_init nf_nat_net_init(struct net *net)
{
/* Leave them the same for the moment. */
net->ipv4.nat_htable_size = net->ct.htable_size;
net->ipv4.nat_bysource = nf_ct_alloc_hashtable(&net->ipv4.nat_htable_size,
&net->ipv4.nat_vmalloced, 0);
net->ipv4.nat_bysource = nf_ct_alloc_hashtable(&net->ipv4.nat_htable_size, 0);
if (!net->ipv4.nat_bysource)
return -ENOMEM;
return 0;
@ -705,8 +704,7 @@ static void __net_exit nf_nat_net_exit(struct net *net)
{
nf_ct_iterate_cleanup(net, &clean_nat, NULL);
synchronize_rcu();
nf_ct_free_hashtable(net->ipv4.nat_bysource, net->ipv4.nat_vmalloced,
net->ipv4.nat_htable_size);
nf_ct_free_hashtable(net->ipv4.nat_bysource, net->ipv4.nat_htable_size);
}
static struct pernet_operations nf_nat_net_ops = {

26
net/netfilter/nf_conntrack_core.c
View File

@ -1202,9 +1202,9 @@ static int kill_all(struct nf_conn *i, void *data)
return 1;
}
void nf_ct_free_hashtable(void *hash, int vmalloced, unsigned int size)
void nf_ct_free_hashtable(void *hash, unsigned int size)
{
if (vmalloced)
if (is_vmalloc_addr(hash))
vfree(hash);
else
free_pages((unsigned long)hash,
@ -1271,8 +1271,7 @@ static void nf_conntrack_cleanup_net(struct net *net)
goto i_see_dead_people;
}
nf_ct_free_hashtable(net->ct.hash, net->ct.hash_vmalloc,
net->ct.htable_size);
nf_ct_free_hashtable(net->ct.hash, net->ct.htable_size);
nf_conntrack_ecache_fini(net);
nf_conntrack_acct_fini(net);
nf_conntrack_expect_fini(net);
@ -1301,21 +1300,18 @@ void nf_conntrack_cleanup(struct net *net)
}
}
void *nf_ct_alloc_hashtable(unsigned int *sizep, int *vmalloced, int nulls)
void *nf_ct_alloc_hashtable(unsigned int *sizep, int nulls)
{
struct hlist_nulls_head *hash;
unsigned int nr_slots, i;
size_t sz;
*vmalloced = 0;
BUILD_BUG_ON(sizeof(struct hlist_nulls_head) != sizeof(struct hlist_head));
nr_slots = *sizep = roundup(*sizep, PAGE_SIZE / sizeof(struct hlist_nulls_head));
sz = nr_slots * sizeof(struct hlist_nulls_head);
hash = (void *)__get_free_pages(GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO,
get_order(sz));
if (!hash) {
*vmalloced = 1;
printk(KERN_WARNING "nf_conntrack: falling back to vmalloc.\n");
hash = __vmalloc(sz, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO,
PAGE_KERNEL);
@ -1331,7 +1327,7 @@ EXPORT_SYMBOL_GPL(nf_ct_alloc_hashtable);
int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp)
{
int i, bucket, vmalloced, old_vmalloced;
int i, bucket;
unsigned int hashsize, old_size;
struct hlist_nulls_head *hash, *old_hash;
struct nf_conntrack_tuple_hash *h;
@ -1348,7 +1344,7 @@ int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp)
if (!hashsize)
return -EINVAL;
hash = nf_ct_alloc_hashtable(&hashsize, &vmalloced, 1);
hash = nf_ct_alloc_hashtable(&hashsize, 1);
if (!hash)
return -ENOMEM;
@ -1370,15 +1366,13 @@ int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp)
}
}
old_size = init_net.ct.htable_size;
old_vmalloced = init_net.ct.hash_vmalloc;
old_hash = init_net.ct.hash;
init_net.ct.htable_size = nf_conntrack_htable_size = hashsize;
init_net.ct.hash_vmalloc = vmalloced;
init_net.ct.hash = hash;
spin_unlock_bh(&nf_conntrack_lock);
nf_ct_free_hashtable(old_hash, old_vmalloced, old_size);
nf_ct_free_hashtable(old_hash, old_size);
return 0;
}
EXPORT_SYMBOL_GPL(nf_conntrack_set_hashsize);
@ -1491,8 +1485,7 @@ static int nf_conntrack_init_net(struct net *net)
}
net->ct.htable_size = nf_conntrack_htable_size;
net->ct.hash = nf_ct_alloc_hashtable(&net->ct.htable_size,
&net->ct.hash_vmalloc, 1);
net->ct.hash = nf_ct_alloc_hashtable(&net->ct.htable_size, 1);
if (!net->ct.hash) {
ret = -ENOMEM;
printk(KERN_ERR "Unable to create nf_conntrack_hash\n");
@ -1515,8 +1508,7 @@ err_ecache:
err_acct:
nf_conntrack_expect_fini(net);
err_expect:
nf_ct_free_hashtable(net->ct.hash, net->ct.hash_vmalloc,
net->ct.htable_size);
nf_ct_free_hashtable(net->ct.hash, net->ct.htable_size);
err_hash:
kmem_cache_destroy(net->ct.nf_conntrack_cachep);
err_cache:

9
net/netfilter/nf_conntrack_expect.c
View File

@ -639,8 +639,7 @@ int nf_conntrack_expect_init(struct net *net)
}
net->ct.expect_count = 0;
net->ct.expect_hash = nf_ct_alloc_hashtable(&nf_ct_expect_hsize,
&net->ct.expect_vmalloc, 0);
net->ct.expect_hash = nf_ct_alloc_hashtable(&nf_ct_expect_hsize, 0);
if (net->ct.expect_hash == NULL)
goto err1;
@ -662,8 +661,7 @@ err3:
if (net_eq(net, &init_net))
kmem_cache_destroy(nf_ct_expect_cachep);
err2:
nf_ct_free_hashtable(net->ct.expect_hash, net->ct.expect_vmalloc,
nf_ct_expect_hsize);
nf_ct_free_hashtable(net->ct.expect_hash, nf_ct_expect_hsize);
err1:
return err;
}
@ -675,6 +673,5 @@ void nf_conntrack_expect_fini(struct net *net)
rcu_barrier(); /* Wait for call_rcu() before destroy */
kmem_cache_destroy(nf_ct_expect_cachep);
}
nf_ct_free_hashtable(net->ct.expect_hash, net->ct.expect_vmalloc,
nf_ct_expect_hsize);
nf_ct_free_hashtable(net->ct.expect_hash, nf_ct_expect_hsize);
}

10
net/netfilter/nf_conntrack_helper.c
View File

@ -33,7 +33,6 @@ static DEFINE_MUTEX(nf_ct_helper_mutex);
static struct hlist_head *nf_ct_helper_hash __read_mostly;
static unsigned int nf_ct_helper_hsize __read_mostly;
static unsigned int nf_ct_helper_count __read_mostly;
static int nf_ct_helper_vmalloc;
/* Stupid hash, but collision free for the default registrations of the
@ -267,8 +266,7 @@ int nf_conntrack_helper_init(void)
int err;
nf_ct_helper_hsize = 1; /* gets rounded up to use one page */
nf_ct_helper_hash = nf_ct_alloc_hashtable(&nf_ct_helper_hsize,
&nf_ct_helper_vmalloc, 0);
nf_ct_helper_hash = nf_ct_alloc_hashtable(&nf_ct_helper_hsize, 0);
if (!nf_ct_helper_hash)
return -ENOMEM;
@ -279,14 +277,12 @@ int nf_conntrack_helper_init(void)
return 0;
err1:
nf_ct_free_hashtable(nf_ct_helper_hash, nf_ct_helper_vmalloc,
nf_ct_helper_hsize);
nf_ct_free_hashtable(nf_ct_helper_hash, nf_ct_helper_hsize);
return err;
}
void nf_conntrack_helper_fini(void)
{
nf_ct_extend_unregister(&helper_extend);
nf_ct_free_hashtable(nf_ct_helper_hash, nf_ct_helper_vmalloc,
nf_ct_helper_hsize);
nf_ct_free_hashtable(nf_ct_helper_hash, nf_ct_helper_hsize);
}