1 files changed, 388 insertions, 0 deletions
diff --git a/tools/testing/radix-tree/main.c b/tools/testing/radix-tree/main.c
new file mode 100644
index 000000000..b741686e5
--- /dev/null
+++ b/tools/testing/radix-tree/main.c
@@ -0,0 +1,388 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#include <assert.h>
+#include <limits.h>
+
+#include <linux/slab.h>
+#include <linux/radix-tree.h>
+
+#include "test.h"
+#include "regression.h"
+
+void __gang_check(unsigned long middle, long down, long up, int chunk, int hop)
+{
+	long idx;
+	RADIX_TREE(tree, GFP_KERNEL);
+
+	middle = 1 << 30;
+
+	for (idx = -down; idx < up; idx++)
+		item_insert(&tree, middle + idx);
+
+	item_check_absent(&tree, middle - down - 1);
+	for (idx = -down; idx < up; idx++)
+		item_check_present(&tree, middle + idx);
+	item_check_absent(&tree, middle + up);
+
+	if (chunk > 0) {
+		item_gang_check_present(&tree, middle - down, up + down,
+				chunk, hop);
+		item_full_scan(&tree, middle - down, down + up, chunk);
+	}
+	item_kill_tree(&tree);
+}
+
+void gang_check(void)
+{
+	__gang_check(1UL << 30, 128, 128, 35, 2);
+	__gang_check(1UL << 31, 128, 128, 32, 32);
+	__gang_check(1UL << 31, 128, 128, 32, 100);
+	__gang_check(1UL << 31, 128, 128, 17, 7);
+	__gang_check(0xffff0000UL, 0, 65536, 17, 7);
+	__gang_check(0xfffffffeUL, 1, 1, 17, 7);
+}
+
+void __big_gang_check(void)
+{
+	unsigned long start;
+	int wrapped = 0;
+
+	start = 0;
+	do {
+		unsigned long old_start;
+
+//		printf("0x%08lx\n", start);
+		__gang_check(start, rand() % 113 + 1, rand() % 71,
+				rand() % 157, rand() % 91 + 1);
+		old_start = start;
+		start += rand() % 1000000;
+		start %= 1ULL << 33;
+		if (start < old_start)
+			wrapped = 1;
+	} while (!wrapped);
+}
+
+void big_gang_check(bool long_run)
+{
+	int i;
+
+	for (i = 0; i < (long_run ? 1000 : 3); i++) {
+		__big_gang_check();
+		printv(2, "%d ", i);
+		fflush(stdout);
+	}
+}
+
+void add_and_check(void)
+{
+	RADIX_TREE(tree, GFP_KERNEL);
+
+	item_insert(&tree, 44);
+	item_check_present(&tree, 44);
+	item_check_absent(&tree, 43);
+	item_kill_tree(&tree);
+}
+
+void dynamic_height_check(void)
+{
+	int i;
+	RADIX_TREE(tree, GFP_KERNEL);
+	tree_verify_min_height(&tree, 0);
+
+	item_insert(&tree, 42);
+	tree_verify_min_height(&tree, 42);
+
+	item_insert(&tree, 1000000);
+	tree_verify_min_height(&tree, 1000000);
+
+	assert(item_delete(&tree, 1000000));
+	tree_verify_min_height(&tree, 42);
+
+	assert(item_delete(&tree, 42));
+	tree_verify_min_height(&tree, 0);
+
+	for (i = 0; i < 1000; i++) {
+		item_insert(&tree, i);
+		tree_verify_min_height(&tree, i);
+	}
+
+	i--;
+	for (;;) {
+		assert(item_delete(&tree, i));
+		if (i == 0) {
+			tree_verify_min_height(&tree, 0);
+			break;
+		}
+		i--;
+		tree_verify_min_height(&tree, i);
+	}
+
+	item_kill_tree(&tree);
+}
+
+void check_copied_tags(struct radix_tree_root *tree, unsigned long start, unsigned long end, unsigned long *idx, int count, int fromtag, int totag)
+{
+	int i;
+
+	for (i = 0; i < count; i++) {
+/*		if (i % 1000 == 0)
+			putchar('.'); */
+		if (idx[i] < start || idx[i] > end) {
+			if (item_tag_get(tree, idx[i], totag)) {
+				printv(2, "%lu-%lu: %lu, tags %d-%d\n", start,
+				       end, idx[i], item_tag_get(tree, idx[i],
+								 fromtag),
+				       item_tag_get(tree, idx[i], totag));
+			}
+			assert(!item_tag_get(tree, idx[i], totag));
+			continue;
+		}
+		if (item_tag_get(tree, idx[i], fromtag) ^
+			item_tag_get(tree, idx[i], totag)) {
+			printv(2, "%lu-%lu: %lu, tags %d-%d\n", start, end,
+			       idx[i], item_tag_get(tree, idx[i], fromtag),
+			       item_tag_get(tree, idx[i], totag));
+		}
+		assert(!(item_tag_get(tree, idx[i], fromtag) ^
+			 item_tag_get(tree, idx[i], totag)));
+	}
+}
+
+#define ITEMS 50000
+
+void copy_tag_check(void)
+{
+	RADIX_TREE(tree, GFP_KERNEL);
+	unsigned long idx[ITEMS];
+	unsigned long start, end, count = 0, tagged, cur, tmp;
+	int i;
+
+//	printf("generating radix tree indices...\n");
+	start = rand();
+	end = rand();
+	if (start > end && (rand() % 10)) {
+		cur = start;
+		start = end;
+		end = cur;
+	}
+	/* Specifically create items around the start and the end of the range
+	 * with high probability to check for off by one errors */
+	cur = rand();
+	if (cur & 1) {
+		item_insert(&tree, start);
+		if (cur & 2) {
+			if (start <= end)
+				count++;
+			item_tag_set(&tree, start, 0);
+		}
+	}
+	if (cur & 4) {
+		item_insert(&tree, start-1);
+		if (cur & 8)
+			item_tag_set(&tree, start-1, 0);
+	}
+	if (cur & 16) {
+		item_insert(&tree, end);
+		if (cur & 32) {
+			if (start <= end)
+				count++;
+			item_tag_set(&tree, end, 0);
+		}
+	}
+	if (cur & 64) {
+		item_insert(&tree, end+1);
+		if (cur & 128)
+			item_tag_set(&tree, end+1, 0);
+	}
+
+	for (i = 0; i < ITEMS; i++) {
+		do {
+			idx[i] = rand();
+		} while (item_lookup(&tree, idx[i]));
+
+		item_insert(&tree, idx[i]);
+		if (rand() & 1) {
+			item_tag_set(&tree, idx[i], 0);
+			if (idx[i] >= start && idx[i] <= end)
+				count++;
+		}
+/*		if (i % 1000 == 0)
+			putchar('.'); */
+	}
+
+//	printf("\ncopying tags...\n");
+	tagged = tag_tagged_items(&tree, NULL, start, end, ITEMS, 0, 1);
+
+//	printf("checking copied tags\n");
+	assert(tagged == count);
+	check_copied_tags(&tree, start, end, idx, ITEMS, 0, 1);
+
+	/* Copy tags in several rounds */
+//	printf("\ncopying tags...\n");
+	tmp = rand() % (count / 10 + 2);
+	tagged = tag_tagged_items(&tree, NULL, start, end, tmp, 0, 2);
+	assert(tagged == count);
+
+//	printf("%lu %lu %lu\n", tagged, tmp, count);
+//	printf("checking copied tags\n");
+	check_copied_tags(&tree, start, end, idx, ITEMS, 0, 2);
+	verify_tag_consistency(&tree, 0);
+	verify_tag_consistency(&tree, 1);
+	verify_tag_consistency(&tree, 2);
+//	printf("\n");
+	item_kill_tree(&tree);
+}
+
+static void __locate_check(struct radix_tree_root *tree, unsigned long index,
+			unsigned order)
+{
+	struct item *item;
+	unsigned long index2;
+
+	item_insert_order(tree, index, order);
+	item = item_lookup(tree, index);
+	index2 = find_item(tree, item);
+	if (index != index2) {
+		printv(2, "index %ld order %d inserted; found %ld\n",
+			index, order, index2);
+		abort();
+	}
+}
+
+static void __order_0_locate_check(void)
+{
+	RADIX_TREE(tree, GFP_KERNEL);
+	int i;
+
+	for (i = 0; i < 50; i++)
+		__locate_check(&tree, rand() % INT_MAX, 0);
+
+	item_kill_tree(&tree);
+}
+
+static void locate_check(void)
+{
+	RADIX_TREE(tree, GFP_KERNEL);
+	unsigned order;
+	unsigned long offset, index;
+
+	__order_0_locate_check();
+
+	for (order = 0; order < 20; order++) {
+		for (offset = 0; offset < (1 << (order + 3));
+		     offset += (1UL << order)) {
+			for (index = 0; index < (1UL << (order + 5));
+			     index += (1UL << order)) {
+				__locate_check(&tree, index + offset, order);
+			}
+			if (find_item(&tree, &tree) != -1)
+				abort();
+
+			item_kill_tree(&tree);
+		}
+	}
+
+	if (find_item(&tree, &tree) != -1)
+		abort();
+	__locate_check(&tree, -1, 0);
+	if (find_item(&tree, &tree) != -1)
+		abort();
+	item_kill_tree(&tree);
+}
+
+static void single_thread_tests(bool long_run)
+{
+	int i;
+
+	printv(1, "starting single_thread_tests: %d allocated, preempt %d\n",
+		nr_allocated, preempt_count);
+	multiorder_checks();
+	rcu_barrier();
+	printv(2, "after multiorder_check: %d allocated, preempt %d\n",
+		nr_allocated, preempt_count);
+	locate_check();
+	rcu_barrier();
+	printv(2, "after locate_check: %d allocated, preempt %d\n",
+		nr_allocated, preempt_count);
+	tag_check();
+	rcu_barrier();
+	printv(2, "after tag_check: %d allocated, preempt %d\n",
+		nr_allocated, preempt_count);
+	gang_check();
+	rcu_barrier();
+	printv(2, "after gang_check: %d allocated, preempt %d\n",
+		nr_allocated, preempt_count);
+	add_and_check();
+	rcu_barrier();
+	printv(2, "after add_and_check: %d allocated, preempt %d\n",
+		nr_allocated, preempt_count);
+	dynamic_height_check();
+	rcu_barrier();
+	printv(2, "after dynamic_height_check: %d allocated, preempt %d\n",
+		nr_allocated, preempt_count);
+	idr_checks();
+	ida_tests();
+	rcu_barrier();
+	printv(2, "after idr_checks: %d allocated, preempt %d\n",
+		nr_allocated, preempt_count);
+	big_gang_check(long_run);
+	rcu_barrier();
+	printv(2, "after big_gang_check: %d allocated, preempt %d\n",
+		nr_allocated, preempt_count);
+	for (i = 0; i < (long_run ? 2000 : 3); i++) {
+		copy_tag_check();
+		printv(2, "%d ", i);
+		fflush(stdout);
+	}
+	rcu_barrier();
+	printv(2, "after copy_tag_check: %d allocated, preempt %d\n",
+		nr_allocated, preempt_count);
+}
+
+int main(int argc, char **argv)
+{
+	bool long_run = false;
+	int opt;
+	unsigned int seed = time(NULL);
+
+	while ((opt = getopt(argc, argv, "ls:v")) != -1) {
+		if (opt == 'l')
+			long_run = true;
+		else if (opt == 's')
+			seed = strtoul(optarg, NULL, 0);
+		else if (opt == 'v')
+			test_verbose++;
+	}
+
+	printf("random seed %u\n", seed);
+	srand(seed);
+
+	printf("running tests\n");
+
+	rcu_register_thread();
+	radix_tree_init();
+
+	regression1_test();
+	regression2_test();
+	regression3_test();
+	iteration_test(0, 10 + 90 * long_run);
+	iteration_test(7, 10 + 90 * long_run);
+	single_thread_tests(long_run);
+
+	/* Free any remaining preallocated nodes */
+	radix_tree_cpu_dead(0);
+
+	benchmark();
+
+	rcu_barrier();
+	printv(2, "after rcu_barrier: %d allocated, preempt %d\n",
+		nr_allocated, preempt_count);
+	rcu_unregister_thread();
+
+	printf("tests completed\n");
+
+	exit(0);
+}