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| author |   Jani Nikula <jani.nikula@intel.com> | 2014-08-27 06:23:23 +0930 |
|---|---|---|
| committer |   Rusty Russell <rusty@rustcorp.com.au> | 2014-08-27 21:54:08 +0930 |
| commit | 3baee201b06cfaff84c2c5ddc551b192bb3eaed3 (patch) | |
| tree | 68d6d30786363245fb1f4d64ae74615047df9aa1 /include/linux/moduleparam.h | |
| parent | module: make it possible to have unsafe, tainting module params (diff) | |
| download | wireguard-linux-3baee201b06cfaff84c2c5ddc551b192bb3eaed3.tar.xz wireguard-linux-3baee201b06cfaff84c2c5ddc551b192bb3eaed3.zip | |
module: add module_param_unsafe and module_param_named_unsafe
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>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux/moduleparam.h')
| -rw-r--r-- | include/linux/moduleparam.h | 18 |
1 files changed, 18 insertions, 0 deletions
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 |