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-rw-r--r--include/linux/livepatch.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/livepatch.h b/include/linux/livepatch.h
index d08eddc00497..fc5c1be3f6f4 100644
--- a/include/linux/livepatch.h
+++ b/include/linux/livepatch.h
@@ -87,10 +87,35 @@ struct klp_func {
bool transition;
};
+struct klp_object;
+
+/**
+ * struct klp_callbacks - pre/post live-(un)patch callback structure
+ * @pre_patch: executed before code patching
+ * @post_patch: executed after code patching
+ * @pre_unpatch: executed before code unpatching
+ * @post_unpatch: executed after code unpatching
+ * @post_unpatch_enabled: flag indicating if post-unpatch callback
+ * should run
+ *
+ * All callbacks are optional. Only the pre-patch callback, if provided,
+ * will be unconditionally executed. If the parent klp_object fails to
+ * patch for any reason, including a non-zero error status returned from
+ * the pre-patch callback, no further callbacks will be executed.
+ */
+struct klp_callbacks {
+ int (*pre_patch)(struct klp_object *obj);
+ void (*post_patch)(struct klp_object *obj);
+ void (*pre_unpatch)(struct klp_object *obj);
+ void (*post_unpatch)(struct klp_object *obj);
+ bool post_unpatch_enabled;
+};
+
/**
* struct klp_object - kernel object structure for live patching
* @name: module name (or NULL for vmlinux)
* @funcs: function entries for functions to be patched in the object
+ * @callbacks: functions to be executed pre/post (un)patching
* @kobj: kobject for sysfs resources
* @mod: kernel module associated with the patched object
* (NULL for vmlinux)
@@ -100,6 +125,7 @@ struct klp_object {
/* external */
const char *name;
struct klp_func *funcs;
+ struct klp_callbacks callbacks;
/* internal */
struct kobject kobj;