#include <linux/mutex.h>
#include <linux/err.h>
#include <net/compat.h>
+#include <net/sock.h>
#include <asm/uaccess.h>
#include <linux/netfilter/x_tables.h>
do { \
if (!(x)) \
printk("ARP_NF_ASSERT: %s:%s:%u\n", \
- __FUNCTION__, __FILE__, __LINE__); \
+ __func__, __FILE__, __LINE__); \
} while(0)
#else
#define ARP_NF_ASSERT(x)
#endif
static inline int arp_devaddr_compare(const struct arpt_devaddr_info *ap,
- char *hdr_addr, int len)
+ const char *hdr_addr, int len)
{
int i, ret;
const char *outdev,
const struct arpt_arp *arpinfo)
{
- char *arpptr = (char *)(arphdr + 1);
- char *src_devaddr, *tgt_devaddr;
+ const char *arpptr = (char *)(arphdr + 1);
+ const char *src_devaddr, *tgt_devaddr;
__be32 src_ipaddr, tgt_ipaddr;
int i, ret;
unsigned int hook,
const struct net_device *in,
const struct net_device *out,
- struct arpt_table *table)
+ struct xt_table *table)
{
static const char nulldevname[IFNAMSIZ];
unsigned int verdict = NF_DROP;
- struct arphdr *arp;
+ const struct arphdr *arp;
bool hotdrop = false;
struct arpt_entry *e, *back;
const char *indev, *outdev;
void *table_base;
- struct xt_table_info *private;
+ const struct xt_table_info *private;
- /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
- if (!pskb_may_pull(skb, (sizeof(struct arphdr) +
- (2 * skb->dev->addr_len) +
- (2 * sizeof(u32)))))
+ if (!pskb_may_pull(skb, arp_hdr_len(skb->dev)))
return NF_DROP;
indev = in ? in->name : nulldevname;
e->counters.pcnt = pos;
for (;;) {
- struct arpt_standard_target *t
+ const struct arpt_standard_target *t
= (void *)arpt_get_target(e);
int visited = e->comefrom & (1 << hook);
static inline int check_entry(struct arpt_entry *e, const char *name)
{
- struct arpt_entry_target *t;
+ const struct arpt_entry_target *t;
if (!arp_checkentry(&e->arp)) {
duprintf("arp_tables: arp check failed %p %s.\n", e, name);
static inline int check_target(struct arpt_entry *e, const char *name)
{
struct arpt_entry_target *t;
- struct arpt_target *target;
+ struct xt_target *target;
int ret;
t = arpt_get_target(e);
unsigned int *i)
{
struct arpt_entry_target *t;
- struct arpt_target *target;
+ struct xt_target *target;
int ret;
ret = check_entry(e, name);
}
}
-static inline struct xt_counters *alloc_counters(struct arpt_table *table)
+static inline struct xt_counters *alloc_counters(struct xt_table *table)
{
unsigned int countersize;
struct xt_counters *counters;
- struct xt_table_info *private = table->private;
+ const struct xt_table_info *private = table->private;
/* We need atomic snapshot of counters: rest doesn't change
* (other than comefrom, which userspace doesn't care
}
static int copy_entries_to_user(unsigned int total_size,
- struct arpt_table *table,
+ struct xt_table *table,
void __user *userptr)
{
unsigned int off, num;
}
#endif
-static int get_info(void __user *user, int *len, int compat)
+static int get_info(struct net *net, void __user *user, int *len, int compat)
{
char name[ARPT_TABLE_MAXNAMELEN];
- struct arpt_table *t;
+ struct xt_table *t;
int ret;
if (*len != sizeof(struct arpt_getinfo)) {
if (compat)
xt_compat_lock(NF_ARP);
#endif
- t = try_then_request_module(xt_find_table_lock(NF_ARP, name),
+ t = try_then_request_module(xt_find_table_lock(net, NF_ARP, name),
"arptable_%s", name);
if (t && !IS_ERR(t)) {
struct arpt_getinfo info;
- struct xt_table_info *private = t->private;
+ const struct xt_table_info *private = t->private;
#ifdef CONFIG_COMPAT
if (compat) {
return ret;
}
-static int get_entries(struct arpt_get_entries __user *uptr, int *len)
+static int get_entries(struct net *net, struct arpt_get_entries __user *uptr,
+ int *len)
{
int ret;
struct arpt_get_entries get;
- struct arpt_table *t;
+ struct xt_table *t;
if (*len < sizeof(get)) {
duprintf("get_entries: %u < %Zu\n", *len, sizeof(get));
return -EINVAL;
}
- t = xt_find_table_lock(NF_ARP, get.name);
+ t = xt_find_table_lock(net, NF_ARP, get.name);
if (t && !IS_ERR(t)) {
- struct xt_table_info *private = t->private;
+ const struct xt_table_info *private = t->private;
+
duprintf("t->private->number = %u\n",
private->number);
if (get.size == private->size)
else {
duprintf("get_entries: I've got %u not %u!\n",
private->size, get.size);
- ret = -EINVAL;
+ ret = -EAGAIN;
}
module_put(t->me);
xt_table_unlock(t);
return ret;
}
-static int __do_replace(const char *name, unsigned int valid_hooks,
+static int __do_replace(struct net *net, const char *name,
+ unsigned int valid_hooks,
struct xt_table_info *newinfo,
unsigned int num_counters,
void __user *counters_ptr)
{
int ret;
- struct arpt_table *t;
+ struct xt_table *t;
struct xt_table_info *oldinfo;
struct xt_counters *counters;
void *loc_cpu_old_entry;
goto out;
}
- t = try_then_request_module(xt_find_table_lock(NF_ARP, name),
+ t = try_then_request_module(xt_find_table_lock(net, NF_ARP, name),
"arptable_%s", name);
if (!t || IS_ERR(t)) {
ret = t ? PTR_ERR(t) : -ENOENT;
return ret;
}
-static int do_replace(void __user *user, unsigned int len)
+static int do_replace(struct net *net, void __user *user, unsigned int len)
{
int ret;
struct arpt_replace tmp;
duprintf("arp_tables: Translated table\n");
- ret = __do_replace(tmp.name, tmp.valid_hooks, newinfo,
+ ret = __do_replace(net, tmp.name, tmp.valid_hooks, newinfo,
tmp.num_counters, tmp.counters);
if (ret)
goto free_newinfo_untrans;
return 0;
}
-static int do_add_counters(void __user *user, unsigned int len, int compat)
+static int do_add_counters(struct net *net, void __user *user, unsigned int len,
+ int compat)
{
unsigned int i;
struct xt_counters_info tmp;
struct xt_counters *paddc;
unsigned int num_counters;
- char *name;
+ const char *name;
int size;
void *ptmp;
- struct arpt_table *t;
- struct xt_table_info *private;
+ struct xt_table *t;
+ const struct xt_table_info *private;
int ret = 0;
void *loc_cpu_entry;
#ifdef CONFIG_COMPAT
goto free;
}
- t = xt_find_table_lock(NF_ARP, name);
+ t = xt_find_table_lock(net, NF_ARP, name);
if (!t || IS_ERR(t)) {
ret = t ? PTR_ERR(t) : -ENOENT;
goto free;
struct compat_arpt_entry entries[0];
};
-static int compat_do_replace(void __user *user, unsigned int len)
+static int compat_do_replace(struct net *net, void __user *user,
+ unsigned int len)
{
int ret;
struct compat_arpt_replace tmp;
duprintf("compat_do_replace: Translated table\n");
- ret = __do_replace(tmp.name, tmp.valid_hooks, newinfo,
+ ret = __do_replace(net, tmp.name, tmp.valid_hooks, newinfo,
tmp.num_counters, compat_ptr(tmp.counters));
if (ret)
goto free_newinfo_untrans;
switch (cmd) {
case ARPT_SO_SET_REPLACE:
- ret = compat_do_replace(user, len);
+ ret = compat_do_replace(sock_net(sk), user, len);
break;
case ARPT_SO_SET_ADD_COUNTERS:
- ret = do_add_counters(user, len, 1);
+ ret = do_add_counters(sock_net(sk), user, len, 1);
break;
default:
}
static int compat_copy_entries_to_user(unsigned int total_size,
- struct arpt_table *table,
+ struct xt_table *table,
void __user *userptr)
{
struct xt_counters *counters;
- struct xt_table_info *private = table->private;
+ const struct xt_table_info *private = table->private;
void __user *pos;
unsigned int size;
int ret = 0;
struct compat_arpt_entry entrytable[0];
};
-static int compat_get_entries(struct compat_arpt_get_entries __user *uptr,
+static int compat_get_entries(struct net *net,
+ struct compat_arpt_get_entries __user *uptr,
int *len)
{
int ret;
struct compat_arpt_get_entries get;
- struct arpt_table *t;
+ struct xt_table *t;
if (*len < sizeof(get)) {
duprintf("compat_get_entries: %u < %zu\n", *len, sizeof(get));
}
xt_compat_lock(NF_ARP);
- t = xt_find_table_lock(NF_ARP, get.name);
+ t = xt_find_table_lock(net, NF_ARP, get.name);
if (t && !IS_ERR(t)) {
- struct xt_table_info *private = t->private;
+ const struct xt_table_info *private = t->private;
struct xt_table_info info;
duprintf("t->private->number = %u\n", private->number);
} else if (!ret) {
duprintf("compat_get_entries: I've got %u not %u!\n",
private->size, get.size);
- ret = -EINVAL;
+ ret = -EAGAIN;
}
xt_compat_flush_offsets(NF_ARP);
module_put(t->me);
switch (cmd) {
case ARPT_SO_GET_INFO:
- ret = get_info(user, len, 1);
+ ret = get_info(sock_net(sk), user, len, 1);
break;
case ARPT_SO_GET_ENTRIES:
- ret = compat_get_entries(user, len);
+ ret = compat_get_entries(sock_net(sk), user, len);
break;
default:
ret = do_arpt_get_ctl(sk, cmd, user, len);
switch (cmd) {
case ARPT_SO_SET_REPLACE:
- ret = do_replace(user, len);
+ ret = do_replace(sock_net(sk), user, len);
break;
case ARPT_SO_SET_ADD_COUNTERS:
- ret = do_add_counters(user, len, 0);
+ ret = do_add_counters(sock_net(sk), user, len, 0);
break;
default:
switch (cmd) {
case ARPT_SO_GET_INFO:
- ret = get_info(user, len, 0);
+ ret = get_info(sock_net(sk), user, len, 0);
break;
case ARPT_SO_GET_ENTRIES:
- ret = get_entries(user, len);
+ ret = get_entries(sock_net(sk), user, len);
break;
case ARPT_SO_GET_REVISION_TARGET: {
return ret;
}
-int arpt_register_table(struct arpt_table *table,
- const struct arpt_replace *repl)
+struct xt_table *arpt_register_table(struct net *net, struct xt_table *table,
+ const struct arpt_replace *repl)
{
int ret;
struct xt_table_info *newinfo;
struct xt_table_info bootstrap
= { 0, 0, 0, { 0 }, { 0 }, { } };
void *loc_cpu_entry;
+ struct xt_table *new_table;
newinfo = xt_alloc_table_info(repl->size);
if (!newinfo) {
ret = -ENOMEM;
- return ret;
+ goto out;
}
/* choose the copy on our node/cpu */
repl->underflow);
duprintf("arpt_register_table: translate table gives %d\n", ret);
- if (ret != 0) {
- xt_free_table_info(newinfo);
- return ret;
- }
+ if (ret != 0)
+ goto out_free;
- ret = xt_register_table(table, &bootstrap, newinfo);
- if (ret != 0) {
- xt_free_table_info(newinfo);
- return ret;
+ new_table = xt_register_table(net, table, &bootstrap, newinfo);
+ if (IS_ERR(new_table)) {
+ ret = PTR_ERR(new_table);
+ goto out_free;
}
+ return new_table;
- return 0;
+out_free:
+ xt_free_table_info(newinfo);
+out:
+ return ERR_PTR(ret);
}
-void arpt_unregister_table(struct arpt_table *table)
+void arpt_unregister_table(struct xt_table *table)
{
struct xt_table_info *private;
void *loc_cpu_entry;
+ struct module *table_owner = table->me;
private = xt_unregister_table(table);
loc_cpu_entry = private->entries[raw_smp_processor_id()];
ARPT_ENTRY_ITERATE(loc_cpu_entry, private->size,
cleanup_entry, NULL);
+ if (private->number > private->initial_entries)
+ module_put(table_owner);
xt_free_table_info(private);
}
/* The built-in targets: standard (NULL) and error. */
-static struct arpt_target arpt_standard_target __read_mostly = {
+static struct xt_target arpt_standard_target __read_mostly = {
.name = ARPT_STANDARD_TARGET,
.targetsize = sizeof(int),
.family = NF_ARP,
#endif
};
-static struct arpt_target arpt_error_target __read_mostly = {
+static struct xt_target arpt_error_target __read_mostly = {
.name = ARPT_ERROR_TARGET,
.target = arpt_error,
.targetsize = ARPT_FUNCTION_MAXNAMELEN,
.owner = THIS_MODULE,
};
+static int __net_init arp_tables_net_init(struct net *net)
+{
+ return xt_proto_init(net, NF_ARP);
+}
+
+static void __net_exit arp_tables_net_exit(struct net *net)
+{
+ xt_proto_fini(net, NF_ARP);
+}
+
+static struct pernet_operations arp_tables_net_ops = {
+ .init = arp_tables_net_init,
+ .exit = arp_tables_net_exit,
+};
+
static int __init arp_tables_init(void)
{
int ret;
- ret = xt_proto_init(NF_ARP);
+ ret = register_pernet_subsys(&arp_tables_net_ops);
if (ret < 0)
goto err1;
err3:
xt_unregister_target(&arpt_standard_target);
err2:
- xt_proto_fini(NF_ARP);
+ unregister_pernet_subsys(&arp_tables_net_ops);
err1:
return ret;
}
nf_unregister_sockopt(&arpt_sockopts);
xt_unregister_target(&arpt_error_target);
xt_unregister_target(&arpt_standard_target);
- xt_proto_fini(NF_ARP);
+ unregister_pernet_subsys(&arp_tables_net_ops);
}
EXPORT_SYMBOL(arpt_register_table);
projects / linux-2.6-omap-h63xx.git / blobdiff