diff options
Diffstat (limited to 'include/linux/livepatch.h')
| -rw-r--r-- | include/linux/livepatch.h | 26 |
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; |