Messages in this thread Patch in this message | | | From | Jani Nikula <> | Subject | [PATCH 3/4] module: add module_param_unsafe and module_param_named_unsafe | Date | Mon, 11 Aug 2014 16:52:21 +0300 |
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Add the helpers to be used by modules wishing to expose unsafe debugging or testing module parameters that taint the kernel when set.
Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jean Delvare <khali@linux-fr.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Li Zhong <zhong@linux.vnet.ibm.com> Cc: Jon Mason <jon.mason@intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Jani Nikula <jani.nikula@intel.com> --- include/linux/moduleparam.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h index 1e3ffb839daa..9531f9f9729e 100644 --- a/include/linux/moduleparam.h +++ b/include/linux/moduleparam.h @@ -123,6 +123,12 @@ struct kparam_array module_param_named(name, name, type, perm) /** + * module_param_unsafe - same as module_param but taints kernel + */ +#define module_param_unsafe(name, type, perm) \ + module_param_named_unsafe(name, name, type, perm) + +/** * module_param_named - typesafe helper for a renamed module/cmdline parameter * @name: a valid C identifier which is the parameter name. * @value: the actual lvalue to alter. @@ -139,6 +145,14 @@ struct kparam_array __MODULE_PARM_TYPE(name, #type) /** + * module_param_named_unsafe - same as module_param_named but taints kernel + */ +#define module_param_named_unsafe(name, value, type, perm) \ + param_check_##type(name, &(value)); \ + module_param_cb_unsafe(name, ¶m_ops_##type, &value, perm); \ + __MODULE_PARM_TYPE(name, #type) + +/** * module_param_cb - general callback for a module/cmdline parameter * @name: a valid C identifier which is the parameter name. * @ops: the set & get operations for this parameter. @@ -149,6 +163,10 @@ struct kparam_array #define module_param_cb(name, ops, arg, perm) \ __module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, -1, 0) +#define module_param_cb_unsafe(name, ops, arg, perm) \ + __module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, -1, \ + KERNEL_PARAM_FL_UNSAFE) + /** * <level>_param_cb - general callback for a module/cmdline parameter * to be evaluated before certain initcall level -- 1.9.1
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