tools/testing/radix-tree/multiorder.c - kernel/msm-4.9 - Gitiles

 /*
  * multiorder.c: Multi-order radix tree entry testing
  * Copyright (c) 2016 Intel Corporation
  * Author: Ross Zwisler <ross.zwisler@linux.intel.com>
  * Author: Matthew Wilcox <matthew.r.wilcox@intel.com>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
  * version 2, as published by the Free Software Foundation.
  *
  * This program is distributed in the hope it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  * more details.
  */
 #include <linux/radix-tree.h>
 #include <linux/slab.h>
 #include <linux/errno.h>

 #include "test.h"

 #define for_each_index(i, base, order) \
 	for (i = base; i < base + (1 << order); i++)

 static void __multiorder_tag_test(int index, int order)
 {
 	RADIX_TREE(tree, GFP_KERNEL);
 	int base, err, i;
 	unsigned long first = 0;

 	/* our canonical entry */
 	base = index & ~((1 << order) - 1);

 	printf("Multiorder tag test with index %d, canonical entry %d\n",
 			index, base);

 	err = item_insert_order(&tree, index, order);
 	assert(!err);

 	/*
 	 * Verify we get collisions for covered indices.  We try and fail to
 	 * insert an exceptional entry so we don't leak memory via
 	 * item_insert_order().
 	 */
 	for_each_index(i, base, order) {
 		err = __radix_tree_insert(&tree, i, order,
 				(void *)(0xA0 | RADIX_TREE_EXCEPTIONAL_ENTRY));
 		assert(err == -EEXIST);
 	}

 	for_each_index(i, base, order) {
 		assert(!radix_tree_tag_get(&tree, i, 0));
 		assert(!radix_tree_tag_get(&tree, i, 1));
 	}

 	assert(radix_tree_tag_set(&tree, index, 0));

 	for_each_index(i, base, order) {
 		assert(radix_tree_tag_get(&tree, i, 0));
 		assert(!radix_tree_tag_get(&tree, i, 1));
 	}

 	assert(radix_tree_range_tag_if_tagged(&tree, &first, ~0UL, 10, 0, 1) == 1);
 	assert(radix_tree_tag_clear(&tree, index, 0));

 	for_each_index(i, base, order) {
 		assert(!radix_tree_tag_get(&tree, i, 0));
 		assert(radix_tree_tag_get(&tree, i, 1));
 	}

 	assert(radix_tree_tag_clear(&tree, index, 1));

 	assert(!radix_tree_tagged(&tree, 0));
 	assert(!radix_tree_tagged(&tree, 1));

 	item_kill_tree(&tree);
 }

 static void multiorder_tag_tests(void)
 {
 	/* test multi-order entry for indices 0-7 with no sibling pointers */
 	__multiorder_tag_test(0, 3);
 	__multiorder_tag_test(5, 3);

 	/* test multi-order entry for indices 8-15 with no sibling pointers */
 	__multiorder_tag_test(8, 3);
 	__multiorder_tag_test(15, 3);

 	/*
 	 * Our order 5 entry covers indices 0-31 in a tree with height=2.
 	 * This is broken up as follows:
 	 * 0-7:		canonical entry
 	 * 8-15:	sibling 1
 	 * 16-23:	sibling 2
 	 * 24-31:	sibling 3
 	 */
 	__multiorder_tag_test(0, 5);
 	__multiorder_tag_test(29, 5);

 	/* same test, but with indices 32-63 */
 	__multiorder_tag_test(32, 5);
 	__multiorder_tag_test(44, 5);

 	/*
 	 * Our order 8 entry covers indices 0-255 in a tree with height=3.
 	 * This is broken up as follows:
 	 * 0-63:	canonical entry
 	 * 64-127:	sibling 1
 	 * 128-191:	sibling 2
 	 * 192-255:	sibling 3
 	 */
 	__multiorder_tag_test(0, 8);
 	__multiorder_tag_test(190, 8);

 	/* same test, but with indices 256-511 */
 	__multiorder_tag_test(256, 8);
 	__multiorder_tag_test(300, 8);

 	__multiorder_tag_test(0x12345678UL, 8);
 }

 static void multiorder_check(unsigned long index, int order)
 {
 	unsigned long i;
 	unsigned long min = index & ~((1UL << order) - 1);
 	unsigned long max = min + (1UL << order);
 	RADIX_TREE(tree, GFP_KERNEL);

 	printf("Multiorder index %ld, order %d\n", index, order);

 	assert(item_insert_order(&tree, index, order) == 0);

 	for (i = min; i < max; i++) {
 		struct item *item = item_lookup(&tree, i);
 		assert(item != 0);
 		assert(item->index == index);
 	}
 	for (i = 0; i < min; i++)
 		item_check_absent(&tree, i);
 	for (i = max; i < 2*max; i++)
 		item_check_absent(&tree, i);
 	for (i = min; i < max; i++) {
 		static void *entry = (void *)
 					(0xA0 | RADIX_TREE_EXCEPTIONAL_ENTRY);
 		assert(radix_tree_insert(&tree, i, entry) == -EEXIST);
 	}

 	assert(item_delete(&tree, index) != 0);

 	for (i = 0; i < 2*max; i++)
 		item_check_absent(&tree, i);
 }

 static void multiorder_shrink(unsigned long index, int order)
 {
 	unsigned long i;
 	unsigned long max = 1 << order;
 	RADIX_TREE(tree, GFP_KERNEL);
 	struct radix_tree_node *node;

 	printf("Multiorder shrink index %ld, order %d\n", index, order);

 	assert(item_insert_order(&tree, 0, order) == 0);

 	node = tree.rnode;

 	assert(item_insert(&tree, index) == 0);
 	assert(node != tree.rnode);

 	assert(item_delete(&tree, index) != 0);
 	assert(node == tree.rnode);

 	for (i = 0; i < max; i++) {
 		struct item *item = item_lookup(&tree, i);
 		assert(item != 0);
 		assert(item->index == 0);
 	}
 	for (i = max; i < 2*max; i++)
 		item_check_absent(&tree, i);

 	if (!item_delete(&tree, 0)) {
 		printf("failed to delete index %ld (order %d)\n", index, order);		abort();
 	}

 	for (i = 0; i < 2*max; i++)
 		item_check_absent(&tree, i);
 }

 static void multiorder_insert_bug(void)
 {
 	RADIX_TREE(tree, GFP_KERNEL);

 	item_insert(&tree, 0);
 	radix_tree_tag_set(&tree, 0, 0);
 	item_insert_order(&tree, 3 << 6, 6);

 	item_kill_tree(&tree);
 }

 void multiorder_iteration(void)
 {
 	RADIX_TREE(tree, GFP_KERNEL);
 	struct radix_tree_iter iter;
 	void **slot;
 	int i, j, err;

 	printf("Multiorder iteration test\n");

 #define NUM_ENTRIES 11
 	int index[NUM_ENTRIES] = {0, 2, 4, 8, 16, 32, 34, 36, 64, 72, 128};
 	int order[NUM_ENTRIES] = {1, 1, 2, 3,  4,  1,  0,  1,  3,  0, 7};

 	for (i = 0; i < NUM_ENTRIES; i++) {
 		err = item_insert_order(&tree, index[i], order[i]);
 		assert(!err);
 	}

 	for (j = 0; j < 256; j++) {
 		for (i = 0; i < NUM_ENTRIES; i++)
 			if (j <= (index[i] | ((1 << order[i]) - 1)))
 				break;

 		radix_tree_for_each_slot(slot, &tree, &iter, j) {
 			int height = order[i] / RADIX_TREE_MAP_SHIFT;
 			int shift = height * RADIX_TREE_MAP_SHIFT;
 			int mask = (1 << order[i]) - 1;

 			assert(iter.index >= (index[i] &~ mask));
 			assert(iter.index <= (index[i] | mask));
 			assert(iter.shift == shift);
 			i++;
 		}
 	}

 	item_kill_tree(&tree);
 }

 void multiorder_tagged_iteration(void)
 {
 	RADIX_TREE(tree, GFP_KERNEL);
 	struct radix_tree_iter iter;
 	void **slot;
 	unsigned long first = 0;
 	int i, j;

 	printf("Multiorder tagged iteration test\n");

 #define MT_NUM_ENTRIES 9
 	int index[MT_NUM_ENTRIES] = {0, 2, 4, 16, 32, 40, 64, 72, 128};
 	int order[MT_NUM_ENTRIES] = {1, 0, 2, 4,  3,  1,  3,  0,   7};

 #define TAG_ENTRIES 7
 	int tag_index[TAG_ENTRIES] = {0, 4, 16, 40, 64, 72, 128};

 	for (i = 0; i < MT_NUM_ENTRIES; i++)
 		assert(!item_insert_order(&tree, index[i], order[i]));

 	assert(!radix_tree_tagged(&tree, 1));

 	for (i = 0; i < TAG_ENTRIES; i++)
 		assert(radix_tree_tag_set(&tree, tag_index[i], 1));

 	for (j = 0; j < 256; j++) {
 		int mask, k;

 		for (i = 0; i < TAG_ENTRIES; i++) {
 			for (k = i; index[k] < tag_index[i]; k++)
 				;
 			if (j <= (index[k] | ((1 << order[k]) - 1)))
 				break;
 		}

 		radix_tree_for_each_tagged(slot, &tree, &iter, j, 1) {
 			for (k = i; index[k] < tag_index[i]; k++)
 				;
 			mask = (1 << order[k]) - 1;

 			assert(iter.index >= (tag_index[i] &~ mask));
 			assert(iter.index <= (tag_index[i] | mask));
 			i++;
 		}
 	}

 	radix_tree_range_tag_if_tagged(&tree, &first, ~0UL,
 					MT_NUM_ENTRIES, 1, 2);

 	for (j = 0; j < 256; j++) {
 		int mask, k;

 		for (i = 0; i < TAG_ENTRIES; i++) {
 			for (k = i; index[k] < tag_index[i]; k++)
 				;
 			if (j <= (index[k] | ((1 << order[k]) - 1)))
 				break;
 		}

 		radix_tree_for_each_tagged(slot, &tree, &iter, j, 2) {
 			for (k = i; index[k] < tag_index[i]; k++)
 				;
 			mask = (1 << order[k]) - 1;

 			assert(iter.index >= (tag_index[i] &~ mask));
 			assert(iter.index <= (tag_index[i] | mask));
 			i++;
 		}
 	}

 	first = 1;
 	radix_tree_range_tag_if_tagged(&tree, &first, ~0UL,
 					MT_NUM_ENTRIES, 1, 0);
 	i = 0;
 	radix_tree_for_each_tagged(slot, &tree, &iter, 0, 0) {
 		assert(iter.index == tag_index[i]);
 		i++;
 	}

 	item_kill_tree(&tree);
 }

 void multiorder_checks(void)
 {
 	int i;

 	for (i = 0; i < 20; i++) {
 		multiorder_check(200, i);
 		multiorder_check(0, i);
 		multiorder_check((1UL << i) + 1, i);
 	}

 	for (i = 0; i < 15; i++)
 		multiorder_shrink((1UL << (i + RADIX_TREE_MAP_SHIFT)), i);

 	multiorder_insert_bug();
 	multiorder_tag_tests();
 	multiorder_iteration();
 	multiorder_tagged_iteration();
 }
	/*
	* multiorder.c: Multi-order radix tree entry testing
	* Copyright (c) 2016 Intel Corporation
	* Author: Ross Zwisler <ross.zwisler@linux.intel.com>
	* Author: Matthew Wilcox <matthew.r.wilcox@intel.com>
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms and conditions of the GNU General Public License,
	* version 2, as published by the Free Software Foundation.
	*
	* This program is distributed in the hope it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	* more details.
	*/
	#include <linux/radix-tree.h>
	#include <linux/slab.h>
	#include <linux/errno.h>

	#include "test.h"

	#define for_each_index(i, base, order) \
	for (i = base; i < base + (1 << order); i++)

	static void __multiorder_tag_test(int index, int order)
	{
	RADIX_TREE(tree, GFP_KERNEL);
	int base, err, i;
	unsigned long first = 0;

	/* our canonical entry */
	base = index & ~((1 << order) - 1);

	printf("Multiorder tag test with index %d, canonical entry %d\n",
	index, base);

	err = item_insert_order(&tree, index, order);
	assert(!err);

	/*
	* Verify we get collisions for covered indices. We try and fail to
	* insert an exceptional entry so we don't leak memory via
	* item_insert_order().
	*/
	for_each_index(i, base, order) {
	err = __radix_tree_insert(&tree, i, order,
	(void *)(0xA0 \| RADIX_TREE_EXCEPTIONAL_ENTRY));
	assert(err == -EEXIST);
	}

	for_each_index(i, base, order) {
	assert(!radix_tree_tag_get(&tree, i, 0));
	assert(!radix_tree_tag_get(&tree, i, 1));
	}

	assert(radix_tree_tag_set(&tree, index, 0));

	for_each_index(i, base, order) {
	assert(radix_tree_tag_get(&tree, i, 0));
	assert(!radix_tree_tag_get(&tree, i, 1));
	}

	assert(radix_tree_range_tag_if_tagged(&tree, &first, ~0UL, 10, 0, 1) == 1);
	assert(radix_tree_tag_clear(&tree, index, 0));

	for_each_index(i, base, order) {
	assert(!radix_tree_tag_get(&tree, i, 0));
	assert(radix_tree_tag_get(&tree, i, 1));
	}

	assert(radix_tree_tag_clear(&tree, index, 1));

	assert(!radix_tree_tagged(&tree, 0));
	assert(!radix_tree_tagged(&tree, 1));

	item_kill_tree(&tree);
	}

	static void multiorder_tag_tests(void)
	{
	/* test multi-order entry for indices 0-7 with no sibling pointers */
	__multiorder_tag_test(0, 3);
	__multiorder_tag_test(5, 3);

	/* test multi-order entry for indices 8-15 with no sibling pointers */
	__multiorder_tag_test(8, 3);
	__multiorder_tag_test(15, 3);

	/*
	* Our order 5 entry covers indices 0-31 in a tree with height=2.
	* This is broken up as follows:
	* 0-7: canonical entry
	* 8-15: sibling 1
	* 16-23: sibling 2
	* 24-31: sibling 3
	*/
	__multiorder_tag_test(0, 5);
	__multiorder_tag_test(29, 5);

	/* same test, but with indices 32-63 */
	__multiorder_tag_test(32, 5);
	__multiorder_tag_test(44, 5);

	/*
	* Our order 8 entry covers indices 0-255 in a tree with height=3.
	* This is broken up as follows:
	* 0-63: canonical entry
	* 64-127: sibling 1
	* 128-191: sibling 2
	* 192-255: sibling 3
	*/
	__multiorder_tag_test(0, 8);
	__multiorder_tag_test(190, 8);

	/* same test, but with indices 256-511 */
	__multiorder_tag_test(256, 8);
	__multiorder_tag_test(300, 8);

	__multiorder_tag_test(0x12345678UL, 8);
	}

	static void multiorder_check(unsigned long index, int order)
	{
	unsigned long i;
	unsigned long min = index & ~((1UL << order) - 1);
	unsigned long max = min + (1UL << order);
	RADIX_TREE(tree, GFP_KERNEL);

	printf("Multiorder index %ld, order %d\n", index, order);

	assert(item_insert_order(&tree, index, order) == 0);

	for (i = min; i < max; i++) {
	struct item *item = item_lookup(&tree, i);
	assert(item != 0);
	assert(item->index == index);
	}
	for (i = 0; i < min; i++)
	item_check_absent(&tree, i);
	for (i = max; i < 2*max; i++)
	item_check_absent(&tree, i);
	for (i = min; i < max; i++) {
	static void entry = (void )
	(0xA0 \| RADIX_TREE_EXCEPTIONAL_ENTRY);
	assert(radix_tree_insert(&tree, i, entry) == -EEXIST);
	}

	assert(item_delete(&tree, index) != 0);

	for (i = 0; i < 2*max; i++)
	item_check_absent(&tree, i);
	}

	static void multiorder_shrink(unsigned long index, int order)
	{
	unsigned long i;
	unsigned long max = 1 << order;
	RADIX_TREE(tree, GFP_KERNEL);
	struct radix_tree_node *node;

	printf("Multiorder shrink index %ld, order %d\n", index, order);

	assert(item_insert_order(&tree, 0, order) == 0);

	node = tree.rnode;

	assert(item_insert(&tree, index) == 0);
	assert(node != tree.rnode);

	assert(item_delete(&tree, index) != 0);
	assert(node == tree.rnode);

	for (i = 0; i < max; i++) {
	struct item *item = item_lookup(&tree, i);
	assert(item != 0);
	assert(item->index == 0);
	}
	for (i = max; i < 2*max; i++)
	item_check_absent(&tree, i);

	if (!item_delete(&tree, 0)) {
	printf("failed to delete index %ld (order %d)\n", index, order); abort();
	}

	for (i = 0; i < 2*max; i++)
	item_check_absent(&tree, i);
	}

	static void multiorder_insert_bug(void)
	{
	RADIX_TREE(tree, GFP_KERNEL);

	item_insert(&tree, 0);
	radix_tree_tag_set(&tree, 0, 0);
	item_insert_order(&tree, 3 << 6, 6);

	item_kill_tree(&tree);
	}

	void multiorder_iteration(void)
	{
	RADIX_TREE(tree, GFP_KERNEL);
	struct radix_tree_iter iter;
	void **slot;
	int i, j, err;

	printf("Multiorder iteration test\n");

	#define NUM_ENTRIES 11
	int index[NUM_ENTRIES] = {0, 2, 4, 8, 16, 32, 34, 36, 64, 72, 128};
	int order[NUM_ENTRIES] = {1, 1, 2, 3, 4, 1, 0, 1, 3, 0, 7};

	for (i = 0; i < NUM_ENTRIES; i++) {
	err = item_insert_order(&tree, index[i], order[i]);
	assert(!err);
	}

	for (j = 0; j < 256; j++) {
	for (i = 0; i < NUM_ENTRIES; i++)
	if (j <= (index[i] \| ((1 << order[i]) - 1)))
	break;

	radix_tree_for_each_slot(slot, &tree, &iter, j) {
	int height = order[i] / RADIX_TREE_MAP_SHIFT;
	int shift = height * RADIX_TREE_MAP_SHIFT;
	int mask = (1 << order[i]) - 1;

	assert(iter.index >= (index[i] &~ mask));
	assert(iter.index <= (index[i] \| mask));
	assert(iter.shift == shift);
	i++;
	}
	}

	item_kill_tree(&tree);
	}

	void multiorder_tagged_iteration(void)
	{
	RADIX_TREE(tree, GFP_KERNEL);
	struct radix_tree_iter iter;
	void **slot;
	unsigned long first = 0;
	int i, j;

	printf("Multiorder tagged iteration test\n");

	#define MT_NUM_ENTRIES 9
	int index[MT_NUM_ENTRIES] = {0, 2, 4, 16, 32, 40, 64, 72, 128};
	int order[MT_NUM_ENTRIES] = {1, 0, 2, 4, 3, 1, 3, 0, 7};

	#define TAG_ENTRIES 7
	int tag_index[TAG_ENTRIES] = {0, 4, 16, 40, 64, 72, 128};

	for (i = 0; i < MT_NUM_ENTRIES; i++)
	assert(!item_insert_order(&tree, index[i], order[i]));

	assert(!radix_tree_tagged(&tree, 1));

	for (i = 0; i < TAG_ENTRIES; i++)
	assert(radix_tree_tag_set(&tree, tag_index[i], 1));

	for (j = 0; j < 256; j++) {
	int mask, k;

	for (i = 0; i < TAG_ENTRIES; i++) {
	for (k = i; index[k] < tag_index[i]; k++)
	;
	if (j <= (index[k] \| ((1 << order[k]) - 1)))
	break;
	}

	radix_tree_for_each_tagged(slot, &tree, &iter, j, 1) {
	for (k = i; index[k] < tag_index[i]; k++)
	;
	mask = (1 << order[k]) - 1;

	assert(iter.index >= (tag_index[i] &~ mask));
	assert(iter.index <= (tag_index[i] \| mask));
	i++;
	}
	}

	radix_tree_range_tag_if_tagged(&tree, &first, ~0UL,
	MT_NUM_ENTRIES, 1, 2);

	for (j = 0; j < 256; j++) {
	int mask, k;

	for (i = 0; i < TAG_ENTRIES; i++) {
	for (k = i; index[k] < tag_index[i]; k++)
	;
	if (j <= (index[k] \| ((1 << order[k]) - 1)))
	break;
	}

	radix_tree_for_each_tagged(slot, &tree, &iter, j, 2) {
	for (k = i; index[k] < tag_index[i]; k++)
	;
	mask = (1 << order[k]) - 1;

	assert(iter.index >= (tag_index[i] &~ mask));
	assert(iter.index <= (tag_index[i] \| mask));
	i++;
	}
	}

	first = 1;
	radix_tree_range_tag_if_tagged(&tree, &first, ~0UL,
	MT_NUM_ENTRIES, 1, 0);
	i = 0;
	radix_tree_for_each_tagged(slot, &tree, &iter, 0, 0) {
	assert(iter.index == tag_index[i]);
	i++;
	}

	item_kill_tree(&tree);
	}

	void multiorder_checks(void)
	{
	int i;

	for (i = 0; i < 20; i++) {
	multiorder_check(200, i);
	multiorder_check(0, i);
	multiorder_check((1UL << i) + 1, i);
	}

	for (i = 0; i < 15; i++)
	multiorder_shrink((1UL << (i + RADIX_TREE_MAP_SHIFT)), i);

	multiorder_insert_bug();
	multiorder_tag_tests();
	multiorder_iteration();
	multiorder_tagged_iteration();
	}