mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2024-12-29 17:22:07 +00:00
lib: add module support to linked list sorting tests
Extract the linked list sorting test code into its own source file, to allow to compile it either to a loadable module, or builtin into the kernel. Link: http://lkml.kernel.org/r/1488287219-15832-4-git-send-email-geert@linux-m68k.org Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Geert Uytterhoeven
Linus Torvalds
parent
5c4e679898
commit
e327fd7c86
@ -1719,11 +1719,12 @@ config LKDTM
|
||||
Documentation/fault-injection/provoke-crashes.txt
|
||||
|
||||
config TEST_LIST_SORT
|
||||
bool "Linked list sorting test"
|
||||
depends on DEBUG_KERNEL
|
||||
tristate "Linked list sorting test"
|
||||
depends on DEBUG_KERNEL || m
|
||||
help
|
||||
Enable this to turn on 'list_sort()' function test. This test is
|
||||
executed only once during system boot, so affects only boot time.
|
||||
executed only once during system boot (so affects only boot time),
|
||||
or at module load time.
|
||||
|
||||
If unsure, say N.
|
||||
|
||||
|
||||
@ -52,6 +52,7 @@ obj-$(CONFIG_TEST_FIRMWARE) += test_firmware.o
|
||||
obj-$(CONFIG_TEST_HASH) += test_hash.o test_siphash.o
|
||||
obj-$(CONFIG_TEST_KASAN) += test_kasan.o
|
||||
obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o
|
||||
obj-$(CONFIG_TEST_LIST_SORT) += test_list_sort.o
|
||||
obj-$(CONFIG_TEST_LKM) += test_module.o
|
||||
obj-$(CONFIG_TEST_RHASHTABLE) += test_rhashtable.o
|
||||
obj-$(CONFIG_TEST_SORT) += test_sort.o
|
||||
|
||||
149
lib/list_sort.c
149
lib/list_sort.c
@ -1,6 +1,3 @@
|
||||
|
||||
#define pr_fmt(fmt) "list_sort_test: " fmt
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/bug.h>
|
||||
#include <linux/compiler.h>
|
||||
@ -145,149 +142,3 @@ void list_sort(void *priv, struct list_head *head,
|
||||
merge_and_restore_back_links(priv, cmp, head, part[max_lev], list);
|
||||
}
|
||||
EXPORT_SYMBOL(list_sort);
|
||||
|
||||
#ifdef CONFIG_TEST_LIST_SORT
|
||||
|
||||
#include <linux/slab.h>
|
||||
#include <linux/random.h>
|
||||
|
||||
/*
|
||||
* The pattern of set bits in the list length determines which cases
|
||||
* are hit in list_sort().
|
||||
*/
|
||||
#define TEST_LIST_LEN (512+128+2) /* not including head */
|
||||
|
||||
#define TEST_POISON1 0xDEADBEEF
|
||||
#define TEST_POISON2 0xA324354C
|
||||
|
||||
struct debug_el {
|
||||
unsigned int poison1;
|
||||
struct list_head list;
|
||||
unsigned int poison2;
|
||||
int value;
|
||||
unsigned serial;
|
||||
};
|
||||
|
||||
/* Array, containing pointers to all elements in the test list */
|
||||
static struct debug_el **elts __initdata;
|
||||
|
||||
static int __init check(struct debug_el *ela, struct debug_el *elb)
|
||||
{
|
||||
if (ela->serial >= TEST_LIST_LEN) {
|
||||
pr_err("error: incorrect serial %d\n", ela->serial);
|
||||
return -EINVAL;
|
||||
}
|
||||
if (elb->serial >= TEST_LIST_LEN) {
|
||||
pr_err("error: incorrect serial %d\n", elb->serial);
|
||||
return -EINVAL;
|
||||
}
|
||||
if (elts[ela->serial] != ela || elts[elb->serial] != elb) {
|
||||
pr_err("error: phantom element\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
if (ela->poison1 != TEST_POISON1 || ela->poison2 != TEST_POISON2) {
|
||||
pr_err("error: bad poison: %#x/%#x\n",
|
||||
ela->poison1, ela->poison2);
|
||||
return -EINVAL;
|
||||
}
|
||||
if (elb->poison1 != TEST_POISON1 || elb->poison2 != TEST_POISON2) {
|
||||
pr_err("error: bad poison: %#x/%#x\n",
|
||||
elb->poison1, elb->poison2);
|
||||
return -EINVAL;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __init cmp(void *priv, struct list_head *a, struct list_head *b)
|
||||
{
|
||||
struct debug_el *ela, *elb;
|
||||
|
||||
ela = container_of(a, struct debug_el, list);
|
||||
elb = container_of(b, struct debug_el, list);
|
||||
|
||||
check(ela, elb);
|
||||
return ela->value - elb->value;
|
||||
}
|
||||
|
||||
static int __init list_sort_test(void)
|
||||
{
|
||||
int i, count = 1, err = -ENOMEM;
|
||||
struct debug_el *el;
|
||||
struct list_head *cur;
|
||||
LIST_HEAD(head);
|
||||
|
||||
pr_debug("start testing list_sort()\n");
|
||||
|
||||
elts = kcalloc(TEST_LIST_LEN, sizeof(*elts), GFP_KERNEL);
|
||||
if (!elts) {
|
||||
pr_err("error: cannot allocate memory\n");
|
||||
return err;
|
||||
}
|
||||
|
||||
for (i = 0; i < TEST_LIST_LEN; i++) {
|
||||
el = kmalloc(sizeof(*el), GFP_KERNEL);
|
||||
if (!el) {
|
||||
pr_err("error: cannot allocate memory\n");
|
||||
goto exit;
|
||||
}
|
||||
/* force some equivalencies */
|
||||
el->value = prandom_u32() % (TEST_LIST_LEN / 3);
|
||||
el->serial = i;
|
||||
el->poison1 = TEST_POISON1;
|
||||
el->poison2 = TEST_POISON2;
|
||||
elts[i] = el;
|
||||
list_add_tail(&el->list, &head);
|
||||
}
|
||||
|
||||
list_sort(NULL, &head, cmp);
|
||||
|
||||
err = -EINVAL;
|
||||
for (cur = head.next; cur->next != &head; cur = cur->next) {
|
||||
struct debug_el *el1;
|
||||
int cmp_result;
|
||||
|
||||
if (cur->next->prev != cur) {
|
||||
pr_err("error: list is corrupted\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
cmp_result = cmp(NULL, cur, cur->next);
|
||||
if (cmp_result > 0) {
|
||||
pr_err("error: list is not sorted\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
el = container_of(cur, struct debug_el, list);
|
||||
el1 = container_of(cur->next, struct debug_el, list);
|
||||
if (cmp_result == 0 && el->serial >= el1->serial) {
|
||||
pr_err("error: order of equivalent elements not "
|
||||
"preserved\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
if (check(el, el1)) {
|
||||
pr_err("error: element check failed\n");
|
||||
goto exit;
|
||||
}
|
||||
count++;
|
||||
}
|
||||
if (head.prev != cur) {
|
||||
pr_err("error: list is corrupted\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
|
||||
if (count != TEST_LIST_LEN) {
|
||||
pr_err("error: bad list length %d", count);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
err = 0;
|
||||
exit:
|
||||
for (i = 0; i < TEST_LIST_LEN; i++)
|
||||
kfree(elts[i]);
|
||||
kfree(elts);
|
||||
return err;
|
||||
}
|
||||
late_initcall(list_sort_test);
|
||||
#endif /* CONFIG_TEST_LIST_SORT */
|
||||
|
||||
150
lib/test_list_sort.c
Normal file
150
lib/test_list_sort.c
Normal file
@ -0,0 +1,150 @@
|
||||
#define pr_fmt(fmt) "list_sort_test: " fmt
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/list_sort.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/printk.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/random.h>
|
||||
|
||||
/*
|
||||
* The pattern of set bits in the list length determines which cases
|
||||
* are hit in list_sort().
|
||||
*/
|
||||
#define TEST_LIST_LEN (512+128+2) /* not including head */
|
||||
|
||||
#define TEST_POISON1 0xDEADBEEF
|
||||
#define TEST_POISON2 0xA324354C
|
||||
|
||||
struct debug_el {
|
||||
unsigned int poison1;
|
||||
struct list_head list;
|
||||
unsigned int poison2;
|
||||
int value;
|
||||
unsigned serial;
|
||||
};
|
||||
|
||||
/* Array, containing pointers to all elements in the test list */
|
||||
static struct debug_el **elts __initdata;
|
||||
|
||||
static int __init check(struct debug_el *ela, struct debug_el *elb)
|
||||
{
|
||||
if (ela->serial >= TEST_LIST_LEN) {
|
||||
pr_err("error: incorrect serial %d\n", ela->serial);
|
||||
return -EINVAL;
|
||||
}
|
||||
if (elb->serial >= TEST_LIST_LEN) {
|
||||
pr_err("error: incorrect serial %d\n", elb->serial);
|
||||
return -EINVAL;
|
||||
}
|
||||
if (elts[ela->serial] != ela || elts[elb->serial] != elb) {
|
||||
pr_err("error: phantom element\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
if (ela->poison1 != TEST_POISON1 || ela->poison2 != TEST_POISON2) {
|
||||
pr_err("error: bad poison: %#x/%#x\n",
|
||||
ela->poison1, ela->poison2);
|
||||
return -EINVAL;
|
||||
}
|
||||
if (elb->poison1 != TEST_POISON1 || elb->poison2 != TEST_POISON2) {
|
||||
pr_err("error: bad poison: %#x/%#x\n",
|
||||
elb->poison1, elb->poison2);
|
||||
return -EINVAL;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __init cmp(void *priv, struct list_head *a, struct list_head *b)
|
||||
{
|
||||
struct debug_el *ela, *elb;
|
||||
|
||||
ela = container_of(a, struct debug_el, list);
|
||||
elb = container_of(b, struct debug_el, list);
|
||||
|
||||
check(ela, elb);
|
||||
return ela->value - elb->value;
|
||||
}
|
||||
|
||||
static int __init list_sort_test(void)
|
||||
{
|
||||
int i, count = 1, err = -ENOMEM;
|
||||
struct debug_el *el;
|
||||
struct list_head *cur;
|
||||
LIST_HEAD(head);
|
||||
|
||||
pr_debug("start testing list_sort()\n");
|
||||
|
||||
elts = kcalloc(TEST_LIST_LEN, sizeof(*elts), GFP_KERNEL);
|
||||
if (!elts) {
|
||||
pr_err("error: cannot allocate memory\n");
|
||||
return err;
|
||||
}
|
||||
|
||||
for (i = 0; i < TEST_LIST_LEN; i++) {
|
||||
el = kmalloc(sizeof(*el), GFP_KERNEL);
|
||||
if (!el) {
|
||||
pr_err("error: cannot allocate memory\n");
|
||||
goto exit;
|
||||
}
|
||||
/* force some equivalencies */
|
||||
el->value = prandom_u32() % (TEST_LIST_LEN / 3);
|
||||
el->serial = i;
|
||||
el->poison1 = TEST_POISON1;
|
||||
el->poison2 = TEST_POISON2;
|
||||
elts[i] = el;
|
||||
list_add_tail(&el->list, &head);
|
||||
}
|
||||
|
||||
list_sort(NULL, &head, cmp);
|
||||
|
||||
err = -EINVAL;
|
||||
for (cur = head.next; cur->next != &head; cur = cur->next) {
|
||||
struct debug_el *el1;
|
||||
int cmp_result;
|
||||
|
||||
if (cur->next->prev != cur) {
|
||||
pr_err("error: list is corrupted\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
cmp_result = cmp(NULL, cur, cur->next);
|
||||
if (cmp_result > 0) {
|
||||
pr_err("error: list is not sorted\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
el = container_of(cur, struct debug_el, list);
|
||||
el1 = container_of(cur->next, struct debug_el, list);
|
||||
if (cmp_result == 0 && el->serial >= el1->serial) {
|
||||
pr_err("error: order of equivalent elements not "
|
||||
"preserved\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
if (check(el, el1)) {
|
||||
pr_err("error: element check failed\n");
|
||||
goto exit;
|
||||
}
|
||||
count++;
|
||||
}
|
||||
if (head.prev != cur) {
|
||||
pr_err("error: list is corrupted\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
|
||||
if (count != TEST_LIST_LEN) {
|
||||
pr_err("error: bad list length %d", count);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
err = 0;
|
||||
exit:
|
||||
for (i = 0; i < TEST_LIST_LEN; i++)
|
||||
kfree(elts[i]);
|
||||
kfree(elts);
|
||||
return err;
|
||||
}
|
||||
module_init(list_sort_test);
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user