[NETFILTER]: ip_tables: move compat offset calculation to x_tables

[safe/jmp/linux-2.6] / net / ipv4 / netfilter / ip_tables.c

diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index d8caa1e..07be12c 100644 (file)
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -1014,63 +1014,12 @@ copy_entries_to_user(unsigned int total_size,
 }
 
 #ifdef CONFIG_COMPAT
-struct compat_delta {
-       struct compat_delta *next;
-       unsigned int offset;
-       short delta;
-};
-
-static struct compat_delta *compat_offsets;
-
-static int compat_add_offset(unsigned int offset, short delta)
-{
-       struct compat_delta *tmp;
-
-       tmp = kmalloc(sizeof(struct compat_delta), GFP_KERNEL);
-       if (!tmp)
-               return -ENOMEM;
-       tmp->offset = offset;
-       tmp->delta = delta;
-       if (compat_offsets) {
-               tmp->next = compat_offsets->next;
-               compat_offsets->next = tmp;
-       } else {
-               compat_offsets = tmp;
-               tmp->next = NULL;
-       }
-       return 0;
-}
-
-static void compat_flush_offsets(void)
-{
-       struct compat_delta *tmp, *next;
-
-       if (compat_offsets) {
-               for (tmp = compat_offsets; tmp; tmp = next) {
-                       next = tmp->next;
-                       kfree(tmp);
-               }
-               compat_offsets = NULL;
-       }
-}
-
-static short compat_calc_jump(unsigned int offset)
-{
-       struct compat_delta *tmp;
-       short delta;
-
-       for (tmp = compat_offsets, delta = 0; tmp; tmp = tmp->next)
-               if (tmp->offset < offset)
-                       delta += tmp->delta;
-       return delta;
-}
-
 static void compat_standard_from_user(void *dst, void *src)
 {
        int v = *(compat_int_t *)src;
 
        if (v > 0)
-               v += compat_calc_jump(v);
+               v += xt_compat_calc_jump(AF_INET, v);
        memcpy(dst, &v, sizeof(v));
 }
 
@@ -1079,7 +1028,7 @@ static int compat_standard_to_user(void __user *dst, void *src)
        compat_int_t cv = *(int *)src;
 
        if (cv > 0)
-               cv -= compat_calc_jump(cv);
+               cv -= xt_compat_calc_jump(AF_INET, cv);
        return copy_to_user(dst, &cv, sizeof(cv)) ? -EFAULT : 0;
 }
 
@@ -1104,7 +1053,7 @@ static int compat_calc_entry(struct ipt_entry *e,
        t = ipt_get_target(e);
        off += xt_compat_target_offset(t->u.kernel.target);
        newinfo->size -= off;
-       ret = compat_add_offset(entry_offset, off);
+       ret = xt_compat_add_offset(AF_INET, entry_offset, off);
        if (ret)
                return ret;
 
@@ -1167,7 +1116,7 @@ static int get_info(void __user *user, int *len, int compat)
                if (compat) {
                        struct xt_table_info tmp;
                        ret = compat_table_info(private, &tmp);
-                       compat_flush_offsets();
+                       xt_compat_flush_offsets(AF_INET);
                        private = &tmp;
                }
 #endif
@@ -1631,7 +1580,7 @@ check_compat_entry_size_and_hooks(struct compat_ipt_entry *e,
 
        off += xt_compat_target_offset(target);
        *size += off;
-       ret = compat_add_offset(entry_offset, off);
+       ret = xt_compat_add_offset(AF_INET, entry_offset, off);
        if (ret)
                goto out;
 
@@ -1797,7 +1746,7 @@ translate_compat_table(const char *name,
        ret = COMPAT_IPT_ENTRY_ITERATE(entry0, total_size,
                                       compat_copy_entry_from_user, &pos, &size,
                                       name, newinfo, entry1);
-       compat_flush_offsets();
+       xt_compat_flush_offsets(AF_INET);
        xt_compat_unlock(AF_INET);
        if (ret)
                goto free_newinfo;
@@ -1834,7 +1783,7 @@ out:
        COMPAT_IPT_ENTRY_ITERATE(entry0, total_size, compat_release_entry, &j);
        return ret;
 out_unlock:
-       compat_flush_offsets();
+       xt_compat_flush_offsets(AF_INET);
        xt_compat_unlock(AF_INET);
        goto out;
 }
@@ -1997,7 +1946,7 @@ compat_get_entries(struct compat_ipt_get_entries __user *uptr, int *len)
                                 get.size);
                        ret = -EINVAL;
                }
-               compat_flush_offsets();
+               xt_compat_flush_offsets(AF_INET);
                module_put(t->me);
                xt_table_unlock(t);
        } else