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-rw-r--r--lib/livepatch/test_klp_shadow_vars.c301
1 files changed, 0 insertions, 301 deletions
diff --git a/lib/livepatch/test_klp_shadow_vars.c b/lib/livepatch/test_klp_shadow_vars.c
deleted file mode 100644
index b991164908..0000000000
--- a/lib/livepatch/test_klp_shadow_vars.c
+++ /dev/null
@@ -1,301 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2018 Joe Lawrence <joe.lawrence@redhat.com>
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/livepatch.h>
-#include <linux/slab.h>
-
-/*
- * Keep a small list of pointers so that we can print address-agnostic
- * pointer values. Use a rolling integer count to differentiate the values.
- * Ironically we could have used the shadow variable API to do this, but
- * let's not lean too heavily on the very code we're testing.
- */
-static LIST_HEAD(ptr_list);
-struct shadow_ptr {
- void *ptr;
- int id;
- struct list_head list;
-};
-
-static void free_ptr_list(void)
-{
- struct shadow_ptr *sp, *tmp_sp;
-
- list_for_each_entry_safe(sp, tmp_sp, &ptr_list, list) {
- list_del(&sp->list);
- kfree(sp);
- }
-}
-
-static int ptr_id(void *ptr)
-{
- struct shadow_ptr *sp;
- static int count;
-
- list_for_each_entry(sp, &ptr_list, list) {
- if (sp->ptr == ptr)
- return sp->id;
- }
-
- sp = kmalloc(sizeof(*sp), GFP_ATOMIC);
- if (!sp)
- return -ENOMEM;
- sp->ptr = ptr;
- sp->id = count++;
-
- list_add(&sp->list, &ptr_list);
-
- return sp->id;
-}
-
-/*
- * Shadow variable wrapper functions that echo the function and arguments
- * to the kernel log for testing verification. Don't display raw pointers,
- * but use the ptr_id() value instead.
- */
-static void *shadow_get(void *obj, unsigned long id)
-{
- int **sv;
-
- sv = klp_shadow_get(obj, id);
- pr_info("klp_%s(obj=PTR%d, id=0x%lx) = PTR%d\n",
- __func__, ptr_id(obj), id, ptr_id(sv));
-
- return sv;
-}
-
-static void *shadow_alloc(void *obj, unsigned long id, size_t size,
- gfp_t gfp_flags, klp_shadow_ctor_t ctor,
- void *ctor_data)
-{
- int **var = ctor_data;
- int **sv;
-
- sv = klp_shadow_alloc(obj, id, size, gfp_flags, ctor, var);
- pr_info("klp_%s(obj=PTR%d, id=0x%lx, size=%zx, gfp_flags=%pGg), ctor=PTR%d, ctor_data=PTR%d = PTR%d\n",
- __func__, ptr_id(obj), id, size, &gfp_flags, ptr_id(ctor),
- ptr_id(*var), ptr_id(sv));
-
- return sv;
-}
-
-static void *shadow_get_or_alloc(void *obj, unsigned long id, size_t size,
- gfp_t gfp_flags, klp_shadow_ctor_t ctor,
- void *ctor_data)
-{
- int **var = ctor_data;
- int **sv;
-
- sv = klp_shadow_get_or_alloc(obj, id, size, gfp_flags, ctor, var);
- pr_info("klp_%s(obj=PTR%d, id=0x%lx, size=%zx, gfp_flags=%pGg), ctor=PTR%d, ctor_data=PTR%d = PTR%d\n",
- __func__, ptr_id(obj), id, size, &gfp_flags, ptr_id(ctor),
- ptr_id(*var), ptr_id(sv));
-
- return sv;
-}
-
-static void shadow_free(void *obj, unsigned long id, klp_shadow_dtor_t dtor)
-{
- klp_shadow_free(obj, id, dtor);
- pr_info("klp_%s(obj=PTR%d, id=0x%lx, dtor=PTR%d)\n",
- __func__, ptr_id(obj), id, ptr_id(dtor));
-}
-
-static void shadow_free_all(unsigned long id, klp_shadow_dtor_t dtor)
-{
- klp_shadow_free_all(id, dtor);
- pr_info("klp_%s(id=0x%lx, dtor=PTR%d)\n", __func__, id, ptr_id(dtor));
-}
-
-
-/* Shadow variable constructor - remember simple pointer data */
-static int shadow_ctor(void *obj, void *shadow_data, void *ctor_data)
-{
- int **sv = shadow_data;
- int **var = ctor_data;
-
- if (!var)
- return -EINVAL;
-
- *sv = *var;
- pr_info("%s: PTR%d -> PTR%d\n", __func__, ptr_id(sv), ptr_id(*var));
-
- return 0;
-}
-
-/*
- * With more than one item to free in the list, order is not determined and
- * shadow_dtor will not be passed to shadow_free_all() which would make the
- * test fail. (see pass 6)
- */
-static void shadow_dtor(void *obj, void *shadow_data)
-{
- int **sv = shadow_data;
-
- pr_info("%s(obj=PTR%d, shadow_data=PTR%d)\n",
- __func__, ptr_id(obj), ptr_id(sv));
-}
-
-/* number of objects we simulate that need shadow vars */
-#define NUM_OBJS 3
-
-/* dynamically created obj fields have the following shadow var id values */
-#define SV_ID1 0x1234
-#define SV_ID2 0x1235
-
-/*
- * The main test case adds/removes new fields (shadow var) to each of these
- * test structure instances. The last group of fields in the struct represent
- * the idea that shadow variables may be added and removed to and from the
- * struct during execution.
- */
-struct test_object {
- /* add anything here below and avoid to define an empty struct */
- struct shadow_ptr sp;
-
- /* these represent shadow vars added and removed with SV_ID{1,2} */
- /* char nfield1; */
- /* int nfield2; */
-};
-
-static int test_klp_shadow_vars_init(void)
-{
- struct test_object objs[NUM_OBJS];
- char nfields1[NUM_OBJS], *pnfields1[NUM_OBJS], **sv1[NUM_OBJS];
- char *pndup[NUM_OBJS];
- int nfields2[NUM_OBJS], *pnfields2[NUM_OBJS], **sv2[NUM_OBJS];
- void **sv;
- int ret;
- int i;
-
- ptr_id(NULL);
-
- /*
- * With an empty shadow variable hash table, expect not to find
- * any matches.
- */
- sv = shadow_get(&objs[0], SV_ID1);
- if (!sv)
- pr_info(" got expected NULL result\n");
-
- /* pass 1: init & alloc a char+int pair of svars for each objs */
- for (i = 0; i < NUM_OBJS; i++) {
- pnfields1[i] = &nfields1[i];
- ptr_id(pnfields1[i]);
-
- if (i % 2) {
- sv1[i] = shadow_alloc(&objs[i], SV_ID1,
- sizeof(pnfields1[i]), GFP_KERNEL,
- shadow_ctor, &pnfields1[i]);
- } else {
- sv1[i] = shadow_get_or_alloc(&objs[i], SV_ID1,
- sizeof(pnfields1[i]), GFP_KERNEL,
- shadow_ctor, &pnfields1[i]);
- }
- if (!sv1[i]) {
- ret = -ENOMEM;
- goto out;
- }
-
- pnfields2[i] = &nfields2[i];
- ptr_id(pnfields2[i]);
- sv2[i] = shadow_alloc(&objs[i], SV_ID2, sizeof(pnfields2[i]),
- GFP_KERNEL, shadow_ctor, &pnfields2[i]);
- if (!sv2[i]) {
- ret = -ENOMEM;
- goto out;
- }
- }
-
- /* pass 2: verify we find allocated svars and where they point to */
- for (i = 0; i < NUM_OBJS; i++) {
- /* check the "char" svar for all objects */
- sv = shadow_get(&objs[i], SV_ID1);
- if (!sv) {
- ret = -EINVAL;
- goto out;
- }
- if ((char **)sv == sv1[i] && *sv1[i] == pnfields1[i])
- pr_info(" got expected PTR%d -> PTR%d result\n",
- ptr_id(sv1[i]), ptr_id(*sv1[i]));
-
- /* check the "int" svar for all objects */
- sv = shadow_get(&objs[i], SV_ID2);
- if (!sv) {
- ret = -EINVAL;
- goto out;
- }
- if ((int **)sv == sv2[i] && *sv2[i] == pnfields2[i])
- pr_info(" got expected PTR%d -> PTR%d result\n",
- ptr_id(sv2[i]), ptr_id(*sv2[i]));
- }
-
- /* pass 3: verify that 'get_or_alloc' returns already allocated svars */
- for (i = 0; i < NUM_OBJS; i++) {
- pndup[i] = &nfields1[i];
- ptr_id(pndup[i]);
-
- sv = shadow_get_or_alloc(&objs[i], SV_ID1, sizeof(pndup[i]),
- GFP_KERNEL, shadow_ctor, &pndup[i]);
- if (!sv) {
- ret = -EINVAL;
- goto out;
- }
- if ((char **)sv == sv1[i] && *sv1[i] == pnfields1[i])
- pr_info(" got expected PTR%d -> PTR%d result\n",
- ptr_id(sv1[i]), ptr_id(*sv1[i]));
- }
-
- /* pass 4: free <objs[*], SV_ID1> pairs of svars, verify removal */
- for (i = 0; i < NUM_OBJS; i++) {
- shadow_free(&objs[i], SV_ID1, shadow_dtor); /* 'char' pairs */
- sv = shadow_get(&objs[i], SV_ID1);
- if (!sv)
- pr_info(" got expected NULL result\n");
- }
-
- /* pass 5: check we still find <objs[*], SV_ID2> svar pairs */
- for (i = 0; i < NUM_OBJS; i++) {
- sv = shadow_get(&objs[i], SV_ID2); /* 'int' pairs */
- if (!sv) {
- ret = -EINVAL;
- goto out;
- }
- if ((int **)sv == sv2[i] && *sv2[i] == pnfields2[i])
- pr_info(" got expected PTR%d -> PTR%d result\n",
- ptr_id(sv2[i]), ptr_id(*sv2[i]));
- }
-
- /* pass 6: free all the <objs[*], SV_ID2> svar pairs too. */
- shadow_free_all(SV_ID2, NULL); /* 'int' pairs */
- for (i = 0; i < NUM_OBJS; i++) {
- sv = shadow_get(&objs[i], SV_ID2);
- if (!sv)
- pr_info(" got expected NULL result\n");
- }
-
- free_ptr_list();
-
- return 0;
-out:
- shadow_free_all(SV_ID1, NULL); /* 'char' pairs */
- shadow_free_all(SV_ID2, NULL); /* 'int' pairs */
- free_ptr_list();
-
- return ret;
-}
-
-static void test_klp_shadow_vars_exit(void)
-{
-}
-
-module_init(test_klp_shadow_vars_init);
-module_exit(test_klp_shadow_vars_exit);
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Joe Lawrence <joe.lawrence@redhat.com>");
-MODULE_DESCRIPTION("Livepatch test: shadow variables");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 22:19:09 +0000