Lines Matching full:patch
24 #include "patch.h"
69 * Note that the patch might still be needed before klp_module_going() in klp_find_object_module()
100 static struct klp_object *klp_find_object(struct klp_patch *patch, in klp_find_object() argument
105 klp_for_each_object(patch, obj) { in klp_find_object()
324 * /sys/kernel/livepatch/<patch>
325 * /sys/kernel/livepatch/<patch>/enabled
326 * /sys/kernel/livepatch/<patch>/transition
327 * /sys/kernel/livepatch/<patch>/force
328 * /sys/kernel/livepatch/<patch>/<object>
329 * /sys/kernel/livepatch/<patch>/<object>/<function,sympos>
331 static int __klp_disable_patch(struct klp_patch *patch);
336 struct klp_patch *patch; in enabled_store() local
344 patch = container_of(kobj, struct klp_patch, kobj); in enabled_store()
348 if (patch->enabled == enabled) { in enabled_store()
359 * Do not allow to re-enable a disabled patch. in enabled_store()
361 if (patch == klp_transition_patch) in enabled_store()
364 ret = __klp_disable_patch(patch); in enabled_store()
379 struct klp_patch *patch; in enabled_show() local
381 patch = container_of(kobj, struct klp_patch, kobj); in enabled_show()
382 return snprintf(buf, PAGE_SIZE-1, "%d\n", patch->enabled); in enabled_show()
388 struct klp_patch *patch; in transition_show() local
390 patch = container_of(kobj, struct klp_patch, kobj); in transition_show()
392 patch == klp_transition_patch); in transition_show()
398 struct klp_patch *patch; in force_store() local
411 patch = container_of(kobj, struct klp_patch, kobj); in force_store()
412 if (patch != klp_transition_patch) { in force_store()
443 static void klp_init_object_early(struct klp_patch *patch,
447 struct klp_patch *patch) in klp_alloc_object_dynamic() argument
463 klp_init_object_early(patch, obj); in klp_alloc_object_dynamic()
503 static int klp_add_object_nops(struct klp_patch *patch, in klp_add_object_nops() argument
509 obj = klp_find_object(patch, old_obj); in klp_add_object_nops()
512 obj = klp_alloc_object_dynamic(old_obj->name, patch); in klp_add_object_nops()
533 * patch to facilitate a 'replace' mode.
535 static int klp_add_nops(struct klp_patch *patch) in klp_add_nops() argument
544 err = klp_add_object_nops(patch, old_obj); in klp_add_nops()
555 struct klp_patch *patch; in klp_kobj_release_patch() local
557 patch = container_of(kobj, struct klp_patch, kobj); in klp_kobj_release_patch()
558 complete(&patch->finish); in klp_kobj_release_patch()
625 static void __klp_free_objects(struct klp_patch *patch, bool nops_only) in __klp_free_objects() argument
629 klp_for_each_object_safe(patch, obj, tmp_obj) { in __klp_free_objects()
640 static void klp_free_objects(struct klp_patch *patch) in klp_free_objects() argument
642 __klp_free_objects(patch, false); in klp_free_objects()
645 static void klp_free_objects_dynamic(struct klp_patch *patch) in klp_free_objects_dynamic() argument
647 __klp_free_objects(patch, true); in klp_free_objects_dynamic()
657 static void klp_free_patch_start(struct klp_patch *patch) in klp_free_patch_start() argument
659 if (!list_empty(&patch->list)) in klp_free_patch_start()
660 list_del(&patch->list); in klp_free_patch_start()
662 klp_free_objects(patch); in klp_free_patch_start()
670 * the last function accessing the livepatch structures when the patch
673 static void klp_free_patch_finish(struct klp_patch *patch) in klp_free_patch_finish() argument
678 * this is called when the patch gets disabled and it in klp_free_patch_finish()
681 kobject_put(&patch->kobj); in klp_free_patch_finish()
682 wait_for_completion(&patch->finish); in klp_free_patch_finish()
685 if (!patch->forced) in klp_free_patch_finish()
686 module_put(patch->mod); in klp_free_patch_finish()
690 * The livepatch might be freed from sysfs interface created by the patch.
696 struct klp_patch *patch = in klp_free_patch_work_fn() local
699 klp_free_patch_finish(patch); in klp_free_patch_work_fn()
702 void klp_free_patch_async(struct klp_patch *patch) in klp_free_patch_async() argument
704 klp_free_patch_start(patch); in klp_free_patch_async()
705 schedule_work(&patch->free_work); in klp_free_patch_async()
748 static int klp_apply_object_relocs(struct klp_patch *patch, in klp_apply_object_relocs() argument
752 struct klp_modinfo *info = patch->mod->klp_info; in klp_apply_object_relocs()
760 ret = klp_apply_section_relocs(patch->mod, info->sechdrs, in klp_apply_object_relocs()
762 patch->mod->core_kallsyms.strtab, in klp_apply_object_relocs()
772 static int klp_init_object_loaded(struct klp_patch *patch, in klp_init_object_loaded() argument
785 ret = klp_apply_object_relocs(patch, obj); in klp_init_object_loaded()
820 static int klp_init_object(struct klp_patch *patch, struct klp_object *obj) in klp_init_object() argument
835 ret = kobject_add(&obj->kobj, &patch->kobj, "%s", name); in klp_init_object()
846 ret = klp_init_object_loaded(patch, obj); in klp_init_object()
858 static void klp_init_object_early(struct klp_patch *patch, in klp_init_object_early() argument
863 list_add_tail(&obj->node, &patch->obj_list); in klp_init_object_early()
866 static int klp_init_patch_early(struct klp_patch *patch) in klp_init_patch_early() argument
871 if (!patch->objs) in klp_init_patch_early()
874 INIT_LIST_HEAD(&patch->list); in klp_init_patch_early()
875 INIT_LIST_HEAD(&patch->obj_list); in klp_init_patch_early()
876 kobject_init(&patch->kobj, &klp_ktype_patch); in klp_init_patch_early()
877 patch->enabled = false; in klp_init_patch_early()
878 patch->forced = false; in klp_init_patch_early()
879 INIT_WORK(&patch->free_work, klp_free_patch_work_fn); in klp_init_patch_early()
880 init_completion(&patch->finish); in klp_init_patch_early()
882 klp_for_each_object_static(patch, obj) { in klp_init_patch_early()
886 klp_init_object_early(patch, obj); in klp_init_patch_early()
893 if (!try_module_get(patch->mod)) in klp_init_patch_early()
899 static int klp_init_patch(struct klp_patch *patch) in klp_init_patch() argument
904 ret = kobject_add(&patch->kobj, klp_root_kobj, "%s", patch->mod->name); in klp_init_patch()
908 if (patch->replace) { in klp_init_patch()
909 ret = klp_add_nops(patch); in klp_init_patch()
914 klp_for_each_object(patch, obj) { in klp_init_patch()
915 ret = klp_init_object(patch, obj); in klp_init_patch()
920 list_add_tail(&patch->list, &klp_patches); in klp_init_patch()
925 static int __klp_disable_patch(struct klp_patch *patch) in __klp_disable_patch() argument
929 if (WARN_ON(!patch->enabled)) in __klp_disable_patch()
935 klp_init_transition(patch, KLP_UNPATCHED); in __klp_disable_patch()
937 klp_for_each_object(patch, obj) in __klp_disable_patch()
951 patch->enabled = false; in __klp_disable_patch()
957 static int __klp_enable_patch(struct klp_patch *patch) in __klp_enable_patch() argument
965 if (WARN_ON(patch->enabled)) in __klp_enable_patch()
968 pr_notice("enabling patch '%s'\n", patch->mod->name); in __klp_enable_patch()
970 klp_init_transition(patch, KLP_PATCHED); in __klp_enable_patch()
981 klp_for_each_object(patch, obj) { in __klp_enable_patch()
987 pr_warn("pre-patch callback failed for object '%s'\n", in __klp_enable_patch()
994 pr_warn("failed to patch object '%s'\n", in __klp_enable_patch()
1001 patch->enabled = true; in __klp_enable_patch()
1006 pr_warn("failed to enable patch '%s'\n", patch->mod->name); in __klp_enable_patch()
1014 * @patch: patch to be enabled
1016 * Initializes the data structure associated with the patch, creates the sysfs
1025 int klp_enable_patch(struct klp_patch *patch) in klp_enable_patch() argument
1029 if (!patch || !patch->mod) in klp_enable_patch()
1032 if (!is_livepatch_module(patch->mod)) { in klp_enable_patch()
1034 patch->mod->name); in klp_enable_patch()
1048 if (!klp_is_patch_compatible(patch)) { in klp_enable_patch()
1049 pr_err("Livepatch patch (%s) is not compatible with the already installed livepatches.\n", in klp_enable_patch()
1050 patch->mod->name); in klp_enable_patch()
1055 ret = klp_init_patch_early(patch); in klp_enable_patch()
1061 ret = klp_init_patch(patch); in klp_enable_patch()
1065 ret = __klp_enable_patch(patch); in klp_enable_patch()
1074 klp_free_patch_start(patch); in klp_enable_patch()
1078 klp_free_patch_finish(patch); in klp_enable_patch()
1094 * klp_ftrace_handler() might still see the replaced patch on the stack.
1097 * this is handled transparently by patch->module_put.
1142 struct klp_patch *patch; in klp_cleanup_module_patches_limited() local
1145 klp_for_each_patch(patch) { in klp_cleanup_module_patches_limited()
1146 if (patch == limit) in klp_cleanup_module_patches_limited()
1149 klp_for_each_object(patch, obj) { in klp_cleanup_module_patches_limited()
1153 if (patch != klp_transition_patch) in klp_cleanup_module_patches_limited()
1156 pr_notice("reverting patch '%s' on unloading module '%s'\n", in klp_cleanup_module_patches_limited()
1157 patch->mod->name, obj->mod->name); in klp_cleanup_module_patches_limited()
1171 struct klp_patch *patch; in klp_module_coming() local
1186 * get patched by a new patch. in klp_module_coming()
1190 klp_for_each_patch(patch) { in klp_module_coming()
1191 klp_for_each_object(patch, obj) { in klp_module_coming()
1197 ret = klp_init_object_loaded(patch, obj); in klp_module_coming()
1199 pr_warn("failed to initialize patch '%s' for module '%s' (%d)\n", in klp_module_coming()
1200 patch->mod->name, obj->mod->name, ret); in klp_module_coming()
1204 pr_notice("applying patch '%s' to loading module '%s'\n", in klp_module_coming()
1205 patch->mod->name, obj->mod->name); in klp_module_coming()
1209 pr_warn("pre-patch callback failed for object '%s'\n", in klp_module_coming()
1216 pr_warn("failed to apply patch '%s' to module '%s' (%d)\n", in klp_module_coming()
1217 patch->mod->name, obj->mod->name, ret); in klp_module_coming()
1223 if (patch != klp_transition_patch) in klp_module_coming()
1236 * If a patch is unsuccessfully applied, return in klp_module_coming()
1239 pr_warn("patch '%s' failed for module '%s', refusing to load module '%s'\n", in klp_module_coming()
1240 patch->mod->name, obj->mod->name, obj->mod->name); in klp_module_coming()
1243 klp_cleanup_module_patches_limited(mod, patch); in klp_module_coming()
1259 * get patched by a new patch. in klp_module_going()