[NETFILTER]: ipt_hashlimit: add compat conversion functions
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/netfilter/ipt_hashlimit.c b/net/ipv4/netfilter/ipt_hashlimit.c
index b5b74b0..4f73a61 100644
--- a/net/ipv4/netfilter/ipt_hashlimit.c
+++ b/net/ipv4/netfilter/ipt_hashlimit.c
@@ -535,10 +535,39 @@
htable_put(r->hinfo);
}
+#ifdef CONFIG_COMPAT
+struct compat_ipt_hashlimit_info {
+ char name[IFNAMSIZ];
+ struct hashlimit_cfg cfg;
+ compat_uptr_t hinfo;
+ compat_uptr_t master;
+};
+
+static void compat_from_user(void *dst, void *src)
+{
+ int off = offsetof(struct compat_ipt_hashlimit_info, hinfo);
+
+ memcpy(dst, src, off);
+ memset(dst + off, 0, sizeof(struct compat_ipt_hashlimit_info) - off);
+}
+
+static int compat_to_user(void __user *dst, void *src)
+{
+ int off = offsetof(struct compat_ipt_hashlimit_info, hinfo);
+
+ return copy_to_user(dst, src, off) ? -EFAULT : 0;
+}
+#endif
+
static struct ipt_match ipt_hashlimit = {
.name = "hashlimit",
.match = hashlimit_match,
.matchsize = sizeof(struct ipt_hashlimit_info),
+#ifdef CONFIG_COMPAT
+ .compatsize = sizeof(struct compat_ipt_hashlimit_info),
+ .compat_from_user = compat_from_user,
+ .compat_to_user = compat_to_user,
+#endif
.checkentry = hashlimit_checkentry,
.destroy = hashlimit_destroy,
.me = THIS_MODULE