tools/testing/radix-tree/main.c

Source file repositories/reference/linux-study-clean/tools/testing/radix-tree/main.c

File Facts

System
Linux kernel
Corpus path
tools/testing/radix-tree/main.c
Extension
.c
Size
7605 bytes
Lines
331
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

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]));

Annotation

Implementation Notes