allows to call do_update_counters() from upcoming CONFIG_COMPAT
code instead of copy&pasting the same code.
Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
---
net/bridge/netfilter/ebtables.c | 42 ++++++++++++++++++++++++--------------
1 files changed, 26 insertions(+), 16 deletions(-)
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 46030dc..76b99d3 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -1242,38 +1242,33 @@ void ebt_unregister_table(struct net *net, struct ebt_table *table)
}
/* userspace just supplied us with counters */
-static int update_counters(struct net *net, const void __user *user,
- unsigned int len)
+static int do_update_counters(struct net *net, const char *name,
+ struct ebt_counter __user *counters,
+ unsigned int num_counters,
+ const void __user *user, unsigned int len)
{
int i, ret;
struct ebt_counter *tmp;
- struct ebt_replace hlp;
struct ebt_table *t;
- if (copy_from_user(&hlp, user, sizeof(hlp)))
- return -EFAULT;
-
- if (len != sizeof(hlp) + hlp.num_counters * sizeof(struct ebt_counter))
- return -EINVAL;
- if (hlp.num_counters == 0)
+ if (num_counters == 0)
return -EINVAL;
- if (!(tmp = vmalloc(hlp.num_counters * sizeof(*tmp))))
+ tmp = vmalloc(num_counters * sizeof(*tmp));
+ if (!tmp)
return -ENOMEM;
- t = find_table_lock(net, hlp.name, &ret, &ebt_mutex);
+ t = find_table_lock(net, name, &ret, &ebt_mutex);
if (!t)
goto free_tmp;
- if (hlp.num_counters != t->private->nentries) {
+ if (num_counters != t->private->nentries) {
BUGPRINT("Wrong nr of counters\n");
ret = -EINVAL;
goto unlock_mutex;
}
- if ( copy_from_user(tmp, hlp.counters,
- hlp.num_counters * sizeof(struct ebt_counter)) ) {
- BUGPRINT("Updata_counters && !cfu\n");
+ if (copy_from_user(tmp, counters, num_counters * sizeof(*counters))) {
ret = -EFAULT;
goto unlock_mutex;
}
@@ -1282,7 +1277,7 @@ static int update_counters(struct net *net, const void __user *user,
write_lock_bh(&t->lock);
/* we add to the counters of the first cpu */
- for (i = 0; i < hlp.num_counters; i++) {
+ for (i = 0; i < num_counters; i++) {
t->private->counters[i].pcnt += tmp[i].pcnt;
t->private->counters[i].bcnt += tmp[i].bcnt;
}
@@ -1296,6 +1291,21 @@ free_tmp:
return ret;
}
+static int update_counters(struct net *net, const void __user *user,
+ unsigned int len)
+{
+ struct ebt_replace hlp;
+
+ if (copy_from_user(&hlp, user, sizeof(hlp)))
+ return -EFAULT;
+
+ if (len != sizeof(hlp) + hlp.num_counters * sizeof(struct ebt_counter))
+ return -EINVAL;
+
+ return do_update_counters(net, hlp.name, hlp.counters,
+ hlp.num_counters, user, len);
+}
+
static inline int ebt_make_matchname(const struct ebt_entry_match *m,
const char *base, char __user *ubase)
{
--
1.6.3.3
--
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