Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/livepatch.h b/include/linux/livepatch.h
index aec44b1..2734008 100644
--- a/include/linux/livepatch.h
+++ b/include/linux/livepatch.h
@@ -1,21 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* livepatch.h - Kernel Live Patching Core
*
* Copyright (C) 2014 Seth Jennings <sjenning@redhat.com>
* Copyright (C) 2014 SUSE
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _LINUX_LIVEPATCH_H_
@@ -24,6 +12,7 @@
#include <linux/module.h>
#include <linux/ftrace.h>
#include <linux/completion.h>
+#include <linux/list.h>
#if IS_ENABLED(CONFIG_LIVEPATCH)
@@ -40,11 +29,13 @@
* @new_func: pointer to the patched function code
* @old_sympos: a hint indicating which symbol position the old function
* can be found (optional)
- * @old_addr: the address of the function being patched
+ * @old_func: pointer to the function being patched
* @kobj: kobject for sysfs resources
+ * @node: list node for klp_object func_list
* @stack_node: list node for klp_ops func_stack list
* @old_size: size of the old function
* @new_size: size of the new function
+ * @nop: temporary patch to use the original code again; dyn. allocated
* @patched: the func has been added to the klp_ops list
* @transition: the func is currently being applied or reverted
*
@@ -77,10 +68,12 @@
unsigned long old_sympos;
/* internal */
- unsigned long old_addr;
+ void *old_func;
struct kobject kobj;
+ struct list_head node;
struct list_head stack_node;
unsigned long old_size, new_size;
+ bool nop;
bool patched;
bool transition;
};
@@ -115,8 +108,11 @@
* @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
+ * @func_list: dynamic list of the function entries
+ * @node: list node for klp_patch obj_list
* @mod: kernel module associated with the patched object
* (NULL for vmlinux)
+ * @dynamic: temporary object for nop functions; dynamically allocated
* @patched: the object's funcs have been added to the klp_ops list
*/
struct klp_object {
@@ -127,7 +123,10 @@
/* internal */
struct kobject kobj;
+ struct list_head func_list;
+ struct list_head node;
struct module *mod;
+ bool dynamic;
bool patched;
};
@@ -135,35 +134,52 @@
* struct klp_patch - patch structure for live patching
* @mod: reference to the live patch module
* @objs: object entries for kernel objects to be patched
- * @list: list node for global list of registered patches
+ * @replace: replace all actively used patches
+ * @list: list node for global list of actively used patches
* @kobj: kobject for sysfs resources
+ * @obj_list: dynamic list of the object entries
* @enabled: the patch is enabled (but operation may be incomplete)
+ * @forced: was involved in a forced transition
+ * @free_work: patch cleanup from workqueue-context
* @finish: for waiting till it is safe to remove the patch module
*/
struct klp_patch {
/* external */
struct module *mod;
struct klp_object *objs;
+ bool replace;
/* internal */
struct list_head list;
struct kobject kobj;
+ struct list_head obj_list;
bool enabled;
+ bool forced;
+ struct work_struct free_work;
struct completion finish;
};
-#define klp_for_each_object(patch, obj) \
+#define klp_for_each_object_static(patch, obj) \
for (obj = patch->objs; obj->funcs || obj->name; obj++)
-#define klp_for_each_func(obj, func) \
+#define klp_for_each_object_safe(patch, obj, tmp_obj) \
+ list_for_each_entry_safe(obj, tmp_obj, &patch->obj_list, node)
+
+#define klp_for_each_object(patch, obj) \
+ list_for_each_entry(obj, &patch->obj_list, node)
+
+#define klp_for_each_func_static(obj, func) \
for (func = obj->funcs; \
func->old_name || func->new_func || func->old_sympos; \
func++)
-int klp_register_patch(struct klp_patch *);
-int klp_unregister_patch(struct klp_patch *);
+#define klp_for_each_func_safe(obj, func, tmp_func) \
+ list_for_each_entry_safe(func, tmp_func, &obj->func_list, node)
+
+#define klp_for_each_func(obj, func) \
+ list_for_each_entry(func, &obj->func_list, node)
+
int klp_enable_patch(struct klp_patch *);
-int klp_disable_patch(struct klp_patch *);
void arch_klp_init_object_loaded(struct klp_patch *patch,
struct klp_object *obj);