-#ifdef CONFIG_SYSCTL_SYSCALL
-/* The generic sysctl ipc data routine. */
-static int sysctl_ipc_data(ctl_table *table,
- void __user *oldval, size_t __user *oldlenp,
- void __user *newval, size_t newlen)
-{
- size_t len;
- void *data;
-
- /* Get out of I don't have a variable */
- if (!table->data || !table->maxlen)
- return -ENOTDIR;
-
- data = get_ipc(table);
- if (!data)
- return -ENOTDIR;
-
- if (oldval && oldlenp) {
- if (get_user(len, oldlenp))
- return -EFAULT;
- if (len) {
- if (len > table->maxlen)
- len = table->maxlen;
- if (copy_to_user(oldval, data, len))
- return -EFAULT;
- if (put_user(len, oldlenp))
- return -EFAULT;
- }
- }
-
- if (newval && newlen) {
- if (newlen > table->maxlen)
- newlen = table->maxlen;
-
- if (copy_from_user(data, newval, newlen))
- return -EFAULT;
- }
- return 1;
-}
-
-static int sysctl_ipc_registered_data(ctl_table *table,
- void __user *oldval, size_t __user *oldlenp,
- void __user *newval, size_t newlen)
-{
- int rc;
-
- rc = sysctl_ipc_data(table, oldval, oldlenp, newval, newlen);
-
- if (newval && newlen && rc > 0)
- /*
- * Tunable has successfully been changed from userland
- */
- unregister_ipcns_notifier(current->nsproxy->ipc_ns);
-
- return rc;
-}
-#else
-#define sysctl_ipc_data NULL
-#define sysctl_ipc_registered_data NULL
-#endif
-