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[NETFILTER]: arp_tables: move ARPT_SO_GET_INFO handling to seperate function 

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2007-12-17 22:26:24 -08:00 committed by David S. Miller
parent 27e2c26b85
commit 41acd975b9
1 changed files with 46 additions and 42 deletions
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88
net/ipv4/netfilter/arp_tables.c
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@ -782,6 +782,49 @@ static int copy_entries_to_user(unsigned int total_size,
return ret;
}
static int get_info(void __user *user, int *len)
{
char name[ARPT_TABLE_MAXNAMELEN];
struct arpt_table *t;
int ret;
if (*len != sizeof(struct arpt_getinfo)) {
duprintf("length %u != %Zu\n", *len,
sizeof(struct arpt_getinfo));
return -EINVAL;
}
if (copy_from_user(name, user, sizeof(name)) != 0)
return -EFAULT;
name[ARPT_TABLE_MAXNAMELEN-1] = '\0';
t = try_then_request_module(xt_find_table_lock(NF_ARP, name),
"arptable_%s", name);
if (t && !IS_ERR(t)) {
struct arpt_getinfo info;
struct xt_table_info *private = t->private;
info.valid_hooks = t->valid_hooks;
memcpy(info.hook_entry, private->hook_entry,
sizeof(info.hook_entry));
memcpy(info.underflow, private->underflow,
sizeof(info.underflow));
info.num_entries = private->number;
info.size = private->size;
strcpy(info.name, name);
if (copy_to_user(user, &info, *len) != 0)
ret = -EFAULT;
else
ret = 0;
xt_table_unlock(t);
module_put(t->me);
} else
ret = t ? PTR_ERR(t) : -ENOENT;
return ret;
}
static int get_entries(const struct arpt_get_entries *entries,
struct arpt_get_entries __user *uptr)
{
@ -1008,48 +1051,9 @@ static int do_arpt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len
return -EPERM;
switch (cmd) {
case ARPT_SO_GET_INFO: {
char name[ARPT_TABLE_MAXNAMELEN];
struct arpt_table *t;
if (*len != sizeof(struct arpt_getinfo)) {
duprintf("length %u != %Zu\n", *len,
sizeof(struct arpt_getinfo));
ret = -EINVAL;
break;
}
if (copy_from_user(name, user, sizeof(name)) != 0) {
ret = -EFAULT;
break;
}
name[ARPT_TABLE_MAXNAMELEN-1] = '\0';
t = try_then_request_module(xt_find_table_lock(NF_ARP, name),
"arptable_%s", name);
if (t && !IS_ERR(t)) {
struct arpt_getinfo info;
struct xt_table_info *private = t->private;
info.valid_hooks = t->valid_hooks;
memcpy(info.hook_entry, private->hook_entry,
sizeof(info.hook_entry));
memcpy(info.underflow, private->underflow,
sizeof(info.underflow));
info.num_entries = private->number;
info.size = private->size;
strcpy(info.name, name);
if (copy_to_user(user, &info, *len) != 0)
ret = -EFAULT;
else
ret = 0;
xt_table_unlock(t);
module_put(t->me);
} else
ret = t ? PTR_ERR(t) : -ENOENT;
}
break;
case ARPT_SO_GET_INFO:
ret = get_info(user, len);
break;
case ARPT_SO_GET_ENTRIES: {
struct arpt_get_entries get;