mirror of https://github.com/dynup/kpatch
164 lines
4.6 KiB
Diff
164 lines
4.6 KiB
Diff
kpatch/livepatch callback test patch:
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vmlinux
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pcspkr (mod)
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joydev (mod)
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Note: update joydev's pre-patch callback to return -ENODEV to test failure path
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diff -Nupr src.old/drivers/input/joydev.c src/drivers/input/joydev.c
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--- src.old/drivers/input/joydev.c 2017-09-03 16:56:17.000000000 -0400
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+++ src/drivers/input/joydev.c 2018-03-22 16:32:40.963082354 -0400
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@@ -1010,3 +1010,47 @@ static void __exit joydev_exit(void)
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module_init(joydev_init);
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module_exit(joydev_exit);
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+
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+#include <linux/module.h>
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+#include "kpatch-macros.h"
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+
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+static const char *const module_state[] = {
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+ [MODULE_STATE_LIVE] = "[MODULE_STATE_LIVE] Normal state",
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+ [MODULE_STATE_COMING] = "[MODULE_STATE_COMING] Full formed, running module_init",
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+ [MODULE_STATE_GOING] = "[MODULE_STATE_GOING] Going away",
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+ [MODULE_STATE_UNFORMED] = "[MODULE_STATE_UNFORMED] Still setting it up",
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+};
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+
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+static void callback_info(const char *callback, patch_object *obj)
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+{
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+ if (obj->mod)
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+ pr_info("%s: %s -> %s\n", callback, obj->mod->name,
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+ module_state[obj->mod->state]);
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+ else
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+ pr_info("%s: vmlinux\n", callback);
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+}
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+
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+static int pre_patch_callback(patch_object *obj)
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+{
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+ callback_info(__func__, obj);
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+ return 0; /* return -ENODEV; */
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+}
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+KPATCH_PRE_PATCH_CALLBACK(pre_patch_callback);
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+
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+static void post_patch_callback(patch_object *obj)
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+{
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+ callback_info(__func__, obj);
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+}
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+KPATCH_POST_PATCH_CALLBACK(post_patch_callback);
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+
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+static void pre_unpatch_callback(patch_object *obj)
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+{
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+ callback_info(__func__, obj);
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+}
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+KPATCH_PRE_UNPATCH_CALLBACK(pre_unpatch_callback);
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+
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+static void post_unpatch_callback(patch_object *obj)
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+{
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+ callback_info(__func__, obj);
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+}
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+KPATCH_POST_UNPATCH_CALLBACK(post_unpatch_callback);
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diff -Nupr src.old/drivers/input/misc/pcspkr.c src/drivers/input/misc/pcspkr.c
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--- src.old/drivers/input/misc/pcspkr.c 2018-03-22 16:29:27.716082354 -0400
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+++ src/drivers/input/misc/pcspkr.c 2018-03-22 16:32:40.963082354 -0400
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@@ -132,3 +132,46 @@ static struct platform_driver pcspkr_pla
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};
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module_platform_driver(pcspkr_platform_driver);
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+#include <linux/module.h>
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+#include "kpatch-macros.h"
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+
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+static const char *const module_state[] = {
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+ [MODULE_STATE_LIVE] = "[MODULE_STATE_LIVE] Normal state",
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+ [MODULE_STATE_COMING] = "[MODULE_STATE_COMING] Full formed, running module_init",
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+ [MODULE_STATE_GOING] = "[MODULE_STATE_GOING] Going away",
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+ [MODULE_STATE_UNFORMED] = "[MODULE_STATE_UNFORMED] Still setting it up",
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+};
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+
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+static void callback_info(const char *callback, patch_object *obj)
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+{
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+ if (obj->mod)
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+ pr_info("%s: %s -> %s\n", callback, obj->mod->name,
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+ module_state[obj->mod->state]);
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+ else
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+ pr_info("%s: vmlinux\n", callback);
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+}
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+
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+static int pre_patch_callback(patch_object *obj)
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+{
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+ callback_info(__func__, obj);
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+ return 0;
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+}
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+KPATCH_PRE_PATCH_CALLBACK(pre_patch_callback);
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+
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+static void post_patch_callback(patch_object *obj)
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+{
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+ callback_info(__func__, obj);
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+}
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+KPATCH_POST_PATCH_CALLBACK(post_patch_callback);
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+
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+static void pre_unpatch_callback(patch_object *obj)
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+{
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+ callback_info(__func__, obj);
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+}
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+KPATCH_PRE_UNPATCH_CALLBACK(pre_unpatch_callback);
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+
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+static void post_unpatch_callback(patch_object *obj)
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+{
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+ callback_info(__func__, obj);
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+}
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+KPATCH_POST_UNPATCH_CALLBACK(post_unpatch_callback);
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diff -Nupr src.old/fs/aio.c src/fs/aio.c
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--- src.old/fs/aio.c 2017-09-03 16:56:17.000000000 -0400
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+++ src/fs/aio.c 2018-03-22 16:32:40.962082354 -0400
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@@ -46,6 +46,50 @@
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#include "internal.h"
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+#include <linux/module.h>
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+#include "kpatch-macros.h"
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+
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+static const char *const module_state[] = {
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+ [MODULE_STATE_LIVE] = "[MODULE_STATE_LIVE] Normal state",
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+ [MODULE_STATE_COMING] = "[MODULE_STATE_COMING] Full formed, running module_init",
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+ [MODULE_STATE_GOING] = "[MODULE_STATE_GOING] Going away",
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+ [MODULE_STATE_UNFORMED] = "[MODULE_STATE_UNFORMED] Still setting it up",
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+};
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+
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+static void callback_info(const char *callback, patch_object *obj)
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+{
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+ if (obj->mod)
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+ pr_info("%s: %s -> %s\n", callback, obj->mod->name,
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+ module_state[obj->mod->state]);
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+ else
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+ pr_info("%s: vmlinux\n", callback);
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+}
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+
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+static int pre_patch_callback(patch_object *obj)
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+{
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+ callback_info(__func__, obj);
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+ return 0;
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+}
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+KPATCH_PRE_PATCH_CALLBACK(pre_patch_callback);
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+
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+static void post_patch_callback(patch_object *obj)
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+{
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+ callback_info(__func__, obj);
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+}
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+KPATCH_POST_PATCH_CALLBACK(post_patch_callback);
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+
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+static void pre_unpatch_callback(patch_object *obj)
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+{
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+ callback_info(__func__, obj);
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+}
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+KPATCH_PRE_UNPATCH_CALLBACK(pre_unpatch_callback);
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+
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+static void post_unpatch_callback(patch_object *obj)
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+{
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+ callback_info(__func__, obj);
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+}
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+KPATCH_POST_UNPATCH_CALLBACK(post_unpatch_callback);
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+
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#define AIO_RING_MAGIC 0xa10a10a1
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#define AIO_RING_COMPAT_FEATURES 1
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#define AIO_RING_INCOMPAT_FEATURES 0
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