mirror of https://gitee.com/openkylin/linux.git
604 lines
13 KiB
C
604 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* idr-test.c: Test the IDR API
|
|
* Copyright (c) 2016 Matthew Wilcox <willy@infradead.org>
|
|
*/
|
|
#include <linux/bitmap.h>
|
|
#include <linux/idr.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
|
|
#include "test.h"
|
|
|
|
#define DUMMY_PTR ((void *)0x10)
|
|
|
|
int item_idr_free(int id, void *p, void *data)
|
|
{
|
|
struct item *item = p;
|
|
assert(item->index == id);
|
|
free(p);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void item_idr_remove(struct idr *idr, int id)
|
|
{
|
|
struct item *item = idr_find(idr, id);
|
|
assert(item->index == id);
|
|
idr_remove(idr, id);
|
|
free(item);
|
|
}
|
|
|
|
void idr_alloc_test(void)
|
|
{
|
|
unsigned long i;
|
|
DEFINE_IDR(idr);
|
|
|
|
assert(idr_alloc_cyclic(&idr, DUMMY_PTR, 0, 0x4000, GFP_KERNEL) == 0);
|
|
assert(idr_alloc_cyclic(&idr, DUMMY_PTR, 0x3ffd, 0x4000, GFP_KERNEL) == 0x3ffd);
|
|
idr_remove(&idr, 0x3ffd);
|
|
idr_remove(&idr, 0);
|
|
|
|
for (i = 0x3ffe; i < 0x4003; i++) {
|
|
int id;
|
|
struct item *item;
|
|
|
|
if (i < 0x4000)
|
|
item = item_create(i, 0);
|
|
else
|
|
item = item_create(i - 0x3fff, 0);
|
|
|
|
id = idr_alloc_cyclic(&idr, item, 1, 0x4000, GFP_KERNEL);
|
|
assert(id == item->index);
|
|
}
|
|
|
|
idr_for_each(&idr, item_idr_free, &idr);
|
|
idr_destroy(&idr);
|
|
}
|
|
|
|
void idr_replace_test(void)
|
|
{
|
|
DEFINE_IDR(idr);
|
|
|
|
idr_alloc(&idr, (void *)-1, 10, 11, GFP_KERNEL);
|
|
idr_replace(&idr, &idr, 10);
|
|
|
|
idr_destroy(&idr);
|
|
}
|
|
|
|
/*
|
|
* Unlike the radix tree, you can put a NULL pointer -- with care -- into
|
|
* the IDR. Some interfaces, like idr_find() do not distinguish between
|
|
* "present, value is NULL" and "not present", but that's exactly what some
|
|
* users want.
|
|
*/
|
|
void idr_null_test(void)
|
|
{
|
|
int i;
|
|
DEFINE_IDR(idr);
|
|
|
|
assert(idr_is_empty(&idr));
|
|
|
|
assert(idr_alloc(&idr, NULL, 0, 0, GFP_KERNEL) == 0);
|
|
assert(!idr_is_empty(&idr));
|
|
idr_remove(&idr, 0);
|
|
assert(idr_is_empty(&idr));
|
|
|
|
assert(idr_alloc(&idr, NULL, 0, 0, GFP_KERNEL) == 0);
|
|
assert(!idr_is_empty(&idr));
|
|
idr_destroy(&idr);
|
|
assert(idr_is_empty(&idr));
|
|
|
|
for (i = 0; i < 10; i++) {
|
|
assert(idr_alloc(&idr, NULL, 0, 0, GFP_KERNEL) == i);
|
|
}
|
|
|
|
assert(idr_replace(&idr, DUMMY_PTR, 3) == NULL);
|
|
assert(idr_replace(&idr, DUMMY_PTR, 4) == NULL);
|
|
assert(idr_replace(&idr, NULL, 4) == DUMMY_PTR);
|
|
assert(idr_replace(&idr, DUMMY_PTR, 11) == ERR_PTR(-ENOENT));
|
|
idr_remove(&idr, 5);
|
|
assert(idr_alloc(&idr, NULL, 0, 0, GFP_KERNEL) == 5);
|
|
idr_remove(&idr, 5);
|
|
|
|
for (i = 0; i < 9; i++) {
|
|
idr_remove(&idr, i);
|
|
assert(!idr_is_empty(&idr));
|
|
}
|
|
idr_remove(&idr, 8);
|
|
assert(!idr_is_empty(&idr));
|
|
idr_remove(&idr, 9);
|
|
assert(idr_is_empty(&idr));
|
|
|
|
assert(idr_alloc(&idr, NULL, 0, 0, GFP_KERNEL) == 0);
|
|
assert(idr_replace(&idr, DUMMY_PTR, 3) == ERR_PTR(-ENOENT));
|
|
assert(idr_replace(&idr, DUMMY_PTR, 0) == NULL);
|
|
assert(idr_replace(&idr, NULL, 0) == DUMMY_PTR);
|
|
|
|
idr_destroy(&idr);
|
|
assert(idr_is_empty(&idr));
|
|
|
|
for (i = 1; i < 10; i++) {
|
|
assert(idr_alloc(&idr, NULL, 1, 0, GFP_KERNEL) == i);
|
|
}
|
|
|
|
idr_destroy(&idr);
|
|
assert(idr_is_empty(&idr));
|
|
}
|
|
|
|
void idr_nowait_test(void)
|
|
{
|
|
unsigned int i;
|
|
DEFINE_IDR(idr);
|
|
|
|
idr_preload(GFP_KERNEL);
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
struct item *item = item_create(i, 0);
|
|
assert(idr_alloc(&idr, item, i, i + 1, GFP_NOWAIT) == i);
|
|
}
|
|
|
|
idr_preload_end();
|
|
|
|
idr_for_each(&idr, item_idr_free, &idr);
|
|
idr_destroy(&idr);
|
|
}
|
|
|
|
void idr_get_next_test(int base)
|
|
{
|
|
unsigned long i;
|
|
int nextid;
|
|
DEFINE_IDR(idr);
|
|
idr_init_base(&idr, base);
|
|
|
|
int indices[] = {4, 7, 9, 15, 65, 128, 1000, 99999, 0};
|
|
|
|
for(i = 0; indices[i]; i++) {
|
|
struct item *item = item_create(indices[i], 0);
|
|
assert(idr_alloc(&idr, item, indices[i], indices[i+1],
|
|
GFP_KERNEL) == indices[i]);
|
|
}
|
|
|
|
for(i = 0, nextid = 0; indices[i]; i++) {
|
|
idr_get_next(&idr, &nextid);
|
|
assert(nextid == indices[i]);
|
|
nextid++;
|
|
}
|
|
|
|
idr_for_each(&idr, item_idr_free, &idr);
|
|
idr_destroy(&idr);
|
|
}
|
|
|
|
int idr_u32_cb(int id, void *ptr, void *data)
|
|
{
|
|
BUG_ON(id < 0);
|
|
BUG_ON(ptr != DUMMY_PTR);
|
|
return 0;
|
|
}
|
|
|
|
void idr_u32_test1(struct idr *idr, u32 handle)
|
|
{
|
|
static bool warned = false;
|
|
u32 id = handle;
|
|
int sid = 0;
|
|
void *ptr;
|
|
|
|
BUG_ON(idr_alloc_u32(idr, DUMMY_PTR, &id, id, GFP_KERNEL));
|
|
BUG_ON(id != handle);
|
|
BUG_ON(idr_alloc_u32(idr, DUMMY_PTR, &id, id, GFP_KERNEL) != -ENOSPC);
|
|
BUG_ON(id != handle);
|
|
if (!warned && id > INT_MAX)
|
|
printk("vvv Ignore these warnings\n");
|
|
ptr = idr_get_next(idr, &sid);
|
|
if (id > INT_MAX) {
|
|
BUG_ON(ptr != NULL);
|
|
BUG_ON(sid != 0);
|
|
} else {
|
|
BUG_ON(ptr != DUMMY_PTR);
|
|
BUG_ON(sid != id);
|
|
}
|
|
idr_for_each(idr, idr_u32_cb, NULL);
|
|
if (!warned && id > INT_MAX) {
|
|
printk("^^^ Warnings over\n");
|
|
warned = true;
|
|
}
|
|
BUG_ON(idr_remove(idr, id) != DUMMY_PTR);
|
|
BUG_ON(!idr_is_empty(idr));
|
|
}
|
|
|
|
void idr_u32_test(int base)
|
|
{
|
|
DEFINE_IDR(idr);
|
|
idr_init_base(&idr, base);
|
|
idr_u32_test1(&idr, 10);
|
|
idr_u32_test1(&idr, 0x7fffffff);
|
|
idr_u32_test1(&idr, 0x80000000);
|
|
idr_u32_test1(&idr, 0x80000001);
|
|
idr_u32_test1(&idr, 0xffe00000);
|
|
idr_u32_test1(&idr, 0xffffffff);
|
|
}
|
|
|
|
static void idr_align_test(struct idr *idr)
|
|
{
|
|
char name[] = "Motorola 68000";
|
|
int i, id;
|
|
void *entry;
|
|
|
|
for (i = 0; i < 9; i++) {
|
|
BUG_ON(idr_alloc(idr, &name[i], 0, 0, GFP_KERNEL) != i);
|
|
idr_for_each_entry(idr, entry, id);
|
|
}
|
|
idr_destroy(idr);
|
|
|
|
for (i = 1; i < 10; i++) {
|
|
BUG_ON(idr_alloc(idr, &name[i], 0, 0, GFP_KERNEL) != i - 1);
|
|
idr_for_each_entry(idr, entry, id);
|
|
}
|
|
idr_destroy(idr);
|
|
|
|
for (i = 2; i < 11; i++) {
|
|
BUG_ON(idr_alloc(idr, &name[i], 0, 0, GFP_KERNEL) != i - 2);
|
|
idr_for_each_entry(idr, entry, id);
|
|
}
|
|
idr_destroy(idr);
|
|
|
|
for (i = 3; i < 12; i++) {
|
|
BUG_ON(idr_alloc(idr, &name[i], 0, 0, GFP_KERNEL) != i - 3);
|
|
idr_for_each_entry(idr, entry, id);
|
|
}
|
|
idr_destroy(idr);
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
BUG_ON(idr_alloc(idr, &name[i], 0, 0, GFP_KERNEL) != 0);
|
|
BUG_ON(idr_alloc(idr, &name[i + 1], 0, 0, GFP_KERNEL) != 1);
|
|
idr_for_each_entry(idr, entry, id);
|
|
idr_remove(idr, 1);
|
|
idr_for_each_entry(idr, entry, id);
|
|
idr_remove(idr, 0);
|
|
BUG_ON(!idr_is_empty(idr));
|
|
}
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
BUG_ON(idr_alloc(idr, NULL, 0, 0, GFP_KERNEL) != 0);
|
|
idr_for_each_entry(idr, entry, id);
|
|
idr_replace(idr, &name[i], 0);
|
|
idr_for_each_entry(idr, entry, id);
|
|
BUG_ON(idr_find(idr, 0) != &name[i]);
|
|
idr_remove(idr, 0);
|
|
}
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
BUG_ON(idr_alloc(idr, &name[i], 0, 0, GFP_KERNEL) != 0);
|
|
BUG_ON(idr_alloc(idr, NULL, 0, 0, GFP_KERNEL) != 1);
|
|
idr_remove(idr, 1);
|
|
idr_for_each_entry(idr, entry, id);
|
|
idr_replace(idr, &name[i + 1], 0);
|
|
idr_for_each_entry(idr, entry, id);
|
|
idr_remove(idr, 0);
|
|
}
|
|
}
|
|
|
|
DEFINE_IDR(find_idr);
|
|
|
|
static void *idr_throbber(void *arg)
|
|
{
|
|
time_t start = time(NULL);
|
|
int id = *(int *)arg;
|
|
|
|
rcu_register_thread();
|
|
do {
|
|
idr_alloc(&find_idr, xa_mk_value(id), id, id + 1, GFP_KERNEL);
|
|
idr_remove(&find_idr, id);
|
|
} while (time(NULL) < start + 10);
|
|
rcu_unregister_thread();
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* There are always either 1 or 2 objects in the IDR. If we find nothing,
|
|
* or we find something at an ID we didn't expect, that's a bug.
|
|
*/
|
|
void idr_find_test_1(int anchor_id, int throbber_id)
|
|
{
|
|
pthread_t throbber;
|
|
time_t start = time(NULL);
|
|
|
|
BUG_ON(idr_alloc(&find_idr, xa_mk_value(anchor_id), anchor_id,
|
|
anchor_id + 1, GFP_KERNEL) != anchor_id);
|
|
|
|
pthread_create(&throbber, NULL, idr_throbber, &throbber_id);
|
|
|
|
rcu_read_lock();
|
|
do {
|
|
int id = 0;
|
|
void *entry = idr_get_next(&find_idr, &id);
|
|
rcu_read_unlock();
|
|
if ((id != anchor_id && id != throbber_id) ||
|
|
entry != xa_mk_value(id)) {
|
|
printf("%s(%d, %d): %p at %d\n", __func__, anchor_id,
|
|
throbber_id, entry, id);
|
|
abort();
|
|
}
|
|
rcu_read_lock();
|
|
} while (time(NULL) < start + 11);
|
|
rcu_read_unlock();
|
|
|
|
pthread_join(throbber, NULL);
|
|
|
|
idr_remove(&find_idr, anchor_id);
|
|
BUG_ON(!idr_is_empty(&find_idr));
|
|
}
|
|
|
|
void idr_find_test(void)
|
|
{
|
|
idr_find_test_1(100000, 0);
|
|
idr_find_test_1(0, 100000);
|
|
}
|
|
|
|
void idr_checks(void)
|
|
{
|
|
unsigned long i;
|
|
DEFINE_IDR(idr);
|
|
|
|
for (i = 0; i < 10000; i++) {
|
|
struct item *item = item_create(i, 0);
|
|
assert(idr_alloc(&idr, item, 0, 20000, GFP_KERNEL) == i);
|
|
}
|
|
|
|
assert(idr_alloc(&idr, DUMMY_PTR, 5, 30, GFP_KERNEL) < 0);
|
|
|
|
for (i = 0; i < 5000; i++)
|
|
item_idr_remove(&idr, i);
|
|
|
|
idr_remove(&idr, 3);
|
|
|
|
idr_for_each(&idr, item_idr_free, &idr);
|
|
idr_destroy(&idr);
|
|
|
|
assert(idr_is_empty(&idr));
|
|
|
|
idr_remove(&idr, 3);
|
|
idr_remove(&idr, 0);
|
|
|
|
assert(idr_alloc(&idr, DUMMY_PTR, 0, 0, GFP_KERNEL) == 0);
|
|
idr_remove(&idr, 1);
|
|
for (i = 1; i < RADIX_TREE_MAP_SIZE; i++)
|
|
assert(idr_alloc(&idr, DUMMY_PTR, 0, 0, GFP_KERNEL) == i);
|
|
idr_remove(&idr, 1 << 30);
|
|
idr_destroy(&idr);
|
|
|
|
for (i = INT_MAX - 3UL; i < INT_MAX + 1UL; i++) {
|
|
struct item *item = item_create(i, 0);
|
|
assert(idr_alloc(&idr, item, i, i + 10, GFP_KERNEL) == i);
|
|
}
|
|
assert(idr_alloc(&idr, DUMMY_PTR, i - 2, i, GFP_KERNEL) == -ENOSPC);
|
|
assert(idr_alloc(&idr, DUMMY_PTR, i - 2, i + 10, GFP_KERNEL) == -ENOSPC);
|
|
|
|
idr_for_each(&idr, item_idr_free, &idr);
|
|
idr_destroy(&idr);
|
|
idr_destroy(&idr);
|
|
|
|
assert(idr_is_empty(&idr));
|
|
|
|
idr_set_cursor(&idr, INT_MAX - 3UL);
|
|
for (i = INT_MAX - 3UL; i < INT_MAX + 3UL; i++) {
|
|
struct item *item;
|
|
unsigned int id;
|
|
if (i <= INT_MAX)
|
|
item = item_create(i, 0);
|
|
else
|
|
item = item_create(i - INT_MAX - 1, 0);
|
|
|
|
id = idr_alloc_cyclic(&idr, item, 0, 0, GFP_KERNEL);
|
|
assert(id == item->index);
|
|
}
|
|
|
|
idr_for_each(&idr, item_idr_free, &idr);
|
|
idr_destroy(&idr);
|
|
assert(idr_is_empty(&idr));
|
|
|
|
for (i = 1; i < 10000; i++) {
|
|
struct item *item = item_create(i, 0);
|
|
assert(idr_alloc(&idr, item, 1, 20000, GFP_KERNEL) == i);
|
|
}
|
|
|
|
idr_for_each(&idr, item_idr_free, &idr);
|
|
idr_destroy(&idr);
|
|
|
|
idr_replace_test();
|
|
idr_alloc_test();
|
|
idr_null_test();
|
|
idr_nowait_test();
|
|
idr_get_next_test(0);
|
|
idr_get_next_test(1);
|
|
idr_get_next_test(4);
|
|
idr_u32_test(4);
|
|
idr_u32_test(1);
|
|
idr_u32_test(0);
|
|
idr_align_test(&idr);
|
|
idr_find_test();
|
|
}
|
|
|
|
#define module_init(x)
|
|
#define module_exit(x)
|
|
#define MODULE_AUTHOR(x)
|
|
#define MODULE_LICENSE(x)
|
|
#define dump_stack() assert(0)
|
|
void ida_dump(struct ida *);
|
|
|
|
#include "../../../lib/test_ida.c"
|
|
|
|
/*
|
|
* Check that we get the correct error when we run out of memory doing
|
|
* allocations. In userspace, GFP_NOWAIT will always fail an allocation.
|
|
* The first test is for not having a bitmap available, and the second test
|
|
* is for not being able to allocate a level of the radix tree.
|
|
*/
|
|
void ida_check_nomem(void)
|
|
{
|
|
DEFINE_IDA(ida);
|
|
int id;
|
|
|
|
id = ida_alloc_min(&ida, 256, GFP_NOWAIT);
|
|
IDA_BUG_ON(&ida, id != -ENOMEM);
|
|
id = ida_alloc_min(&ida, 1UL << 30, GFP_NOWAIT);
|
|
IDA_BUG_ON(&ida, id != -ENOMEM);
|
|
IDA_BUG_ON(&ida, !ida_is_empty(&ida));
|
|
}
|
|
|
|
/*
|
|
* Check handling of conversions between exceptional entries and full bitmaps.
|
|
*/
|
|
void ida_check_conv_user(void)
|
|
{
|
|
DEFINE_IDA(ida);
|
|
unsigned long i;
|
|
|
|
for (i = 0; i < 1000000; i++) {
|
|
int id = ida_alloc(&ida, GFP_NOWAIT);
|
|
if (id == -ENOMEM) {
|
|
IDA_BUG_ON(&ida, ((i % IDA_BITMAP_BITS) !=
|
|
BITS_PER_XA_VALUE) &&
|
|
((i % IDA_BITMAP_BITS) != 0));
|
|
id = ida_alloc(&ida, GFP_KERNEL);
|
|
} else {
|
|
IDA_BUG_ON(&ida, (i % IDA_BITMAP_BITS) ==
|
|
BITS_PER_XA_VALUE);
|
|
}
|
|
IDA_BUG_ON(&ida, id != i);
|
|
}
|
|
ida_destroy(&ida);
|
|
}
|
|
|
|
void ida_check_random(void)
|
|
{
|
|
DEFINE_IDA(ida);
|
|
DECLARE_BITMAP(bitmap, 2048);
|
|
unsigned int i;
|
|
time_t s = time(NULL);
|
|
|
|
repeat:
|
|
memset(bitmap, 0, sizeof(bitmap));
|
|
for (i = 0; i < 100000; i++) {
|
|
int i = rand();
|
|
int bit = i & 2047;
|
|
if (test_bit(bit, bitmap)) {
|
|
__clear_bit(bit, bitmap);
|
|
ida_free(&ida, bit);
|
|
} else {
|
|
__set_bit(bit, bitmap);
|
|
IDA_BUG_ON(&ida, ida_alloc_min(&ida, bit, GFP_KERNEL)
|
|
!= bit);
|
|
}
|
|
}
|
|
ida_destroy(&ida);
|
|
if (time(NULL) < s + 10)
|
|
goto repeat;
|
|
}
|
|
|
|
void ida_simple_get_remove_test(void)
|
|
{
|
|
DEFINE_IDA(ida);
|
|
unsigned long i;
|
|
|
|
for (i = 0; i < 10000; i++) {
|
|
assert(ida_simple_get(&ida, 0, 20000, GFP_KERNEL) == i);
|
|
}
|
|
assert(ida_simple_get(&ida, 5, 30, GFP_KERNEL) < 0);
|
|
|
|
for (i = 0; i < 10000; i++) {
|
|
ida_simple_remove(&ida, i);
|
|
}
|
|
assert(ida_is_empty(&ida));
|
|
|
|
ida_destroy(&ida);
|
|
}
|
|
|
|
void user_ida_checks(void)
|
|
{
|
|
radix_tree_cpu_dead(1);
|
|
|
|
ida_check_nomem();
|
|
ida_check_conv_user();
|
|
ida_check_random();
|
|
ida_simple_get_remove_test();
|
|
|
|
radix_tree_cpu_dead(1);
|
|
}
|
|
|
|
static void *ida_random_fn(void *arg)
|
|
{
|
|
rcu_register_thread();
|
|
ida_check_random();
|
|
rcu_unregister_thread();
|
|
return NULL;
|
|
}
|
|
|
|
static void *ida_leak_fn(void *arg)
|
|
{
|
|
struct ida *ida = arg;
|
|
time_t s = time(NULL);
|
|
int i, ret;
|
|
|
|
rcu_register_thread();
|
|
|
|
do for (i = 0; i < 1000; i++) {
|
|
ret = ida_alloc_range(ida, 128, 128, GFP_KERNEL);
|
|
if (ret >= 0)
|
|
ida_free(ida, 128);
|
|
} while (time(NULL) < s + 2);
|
|
|
|
rcu_unregister_thread();
|
|
return NULL;
|
|
}
|
|
|
|
void ida_thread_tests(void)
|
|
{
|
|
DEFINE_IDA(ida);
|
|
pthread_t threads[20];
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(threads); i++)
|
|
if (pthread_create(&threads[i], NULL, ida_random_fn, NULL)) {
|
|
perror("creating ida thread");
|
|
exit(1);
|
|
}
|
|
|
|
while (i--)
|
|
pthread_join(threads[i], NULL);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(threads); i++)
|
|
if (pthread_create(&threads[i], NULL, ida_leak_fn, &ida)) {
|
|
perror("creating ida thread");
|
|
exit(1);
|
|
}
|
|
|
|
while (i--)
|
|
pthread_join(threads[i], NULL);
|
|
assert(ida_is_empty(&ida));
|
|
}
|
|
|
|
void ida_tests(void)
|
|
{
|
|
user_ida_checks();
|
|
ida_checks();
|
|
ida_exit();
|
|
ida_thread_tests();
|
|
}
|
|
|
|
int __weak main(void)
|
|
{
|
|
rcu_register_thread();
|
|
radix_tree_init();
|
|
idr_checks();
|
|
ida_tests();
|
|
radix_tree_cpu_dead(1);
|
|
rcu_barrier();
|
|
if (nr_allocated)
|
|
printf("nr_allocated = %d\n", nr_allocated);
|
|
rcu_unregister_thread();
|
|
return 0;
|
|
}
|