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