1 // SPDX-License-Identifier: GPL-2.0+
3 * test_xarray.c: Test the XArray API
4 * Copyright (c) 2017-2018 Microsoft Corporation
5 * Copyright (c) 2019-2020 Oracle
6 * Author: Matthew Wilcox <willy@infradead.org>
9 #include <linux/xarray.h>
10 #include <linux/module.h>
12 static unsigned int tests_run;
13 static unsigned int tests_passed;
15 static const unsigned int order_limit =
16 IS_ENABLED(CONFIG_XARRAY_MULTI) ? BITS_PER_LONG : 1;
20 void xa_dump(const struct xarray *xa) { }
23 #define XA_BUG_ON(xa, x) do { \
26 printk("BUG at %s:%d\n", __func__, __LINE__); \
35 static void *xa_mk_index(unsigned long index)
37 return xa_mk_value(index & LONG_MAX);
40 static void *xa_store_index(struct xarray *xa, unsigned long index, gfp_t gfp)
42 return xa_store(xa, index, xa_mk_index(index), gfp);
45 static void xa_insert_index(struct xarray *xa, unsigned long index)
47 XA_BUG_ON(xa, xa_insert(xa, index, xa_mk_index(index),
51 static void xa_alloc_index(struct xarray *xa, unsigned long index, gfp_t gfp)
55 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(index), xa_limit_32b,
57 XA_BUG_ON(xa, id != index);
60 static void xa_erase_index(struct xarray *xa, unsigned long index)
62 XA_BUG_ON(xa, xa_erase(xa, index) != xa_mk_index(index));
63 XA_BUG_ON(xa, xa_load(xa, index) != NULL);
67 * If anyone needs this, please move it to xarray.c. We have no current
68 * users outside the test suite because all current multislot users want
69 * to use the advanced API.
71 static void *xa_store_order(struct xarray *xa, unsigned long index,
72 unsigned order, void *entry, gfp_t gfp)
74 XA_STATE_ORDER(xas, xa, index, order);
79 curr = xas_store(&xas, entry);
81 } while (xas_nomem(&xas, gfp));
86 static noinline void check_xa_err(struct xarray *xa)
88 XA_BUG_ON(xa, xa_err(xa_store_index(xa, 0, GFP_NOWAIT)) != 0);
89 XA_BUG_ON(xa, xa_err(xa_erase(xa, 0)) != 0);
91 /* The kernel does not fail GFP_NOWAIT allocations */
92 XA_BUG_ON(xa, xa_err(xa_store_index(xa, 1, GFP_NOWAIT)) != -ENOMEM);
93 XA_BUG_ON(xa, xa_err(xa_store_index(xa, 1, GFP_NOWAIT)) != -ENOMEM);
95 XA_BUG_ON(xa, xa_err(xa_store_index(xa, 1, GFP_KERNEL)) != 0);
96 XA_BUG_ON(xa, xa_err(xa_store(xa, 1, xa_mk_value(0), GFP_KERNEL)) != 0);
97 XA_BUG_ON(xa, xa_err(xa_erase(xa, 1)) != 0);
98 // kills the test-suite :-(
99 // XA_BUG_ON(xa, xa_err(xa_store(xa, 0, xa_mk_internal(0), 0)) != -EINVAL);
102 static noinline void check_xas_retry(struct xarray *xa)
104 XA_STATE(xas, xa, 0);
107 xa_store_index(xa, 0, GFP_KERNEL);
108 xa_store_index(xa, 1, GFP_KERNEL);
111 XA_BUG_ON(xa, xas_find(&xas, ULONG_MAX) != xa_mk_value(0));
112 xa_erase_index(xa, 1);
113 XA_BUG_ON(xa, !xa_is_retry(xas_reload(&xas)));
114 XA_BUG_ON(xa, xas_retry(&xas, NULL));
115 XA_BUG_ON(xa, xas_retry(&xas, xa_mk_value(0)));
117 XA_BUG_ON(xa, xas.xa_node != XAS_RESTART);
118 XA_BUG_ON(xa, xas_next_entry(&xas, ULONG_MAX) != xa_mk_value(0));
119 XA_BUG_ON(xa, xas.xa_node != NULL);
122 XA_BUG_ON(xa, xa_store_index(xa, 1, GFP_KERNEL) != NULL);
125 XA_BUG_ON(xa, !xa_is_internal(xas_reload(&xas)));
126 xas.xa_node = XAS_RESTART;
127 XA_BUG_ON(xa, xas_next_entry(&xas, ULONG_MAX) != xa_mk_value(0));
130 /* Make sure we can iterate through retry entries */
133 xas_store(&xas, XA_RETRY_ENTRY);
135 xas_store(&xas, XA_RETRY_ENTRY);
138 xas_for_each(&xas, entry, ULONG_MAX) {
139 xas_store(&xas, xa_mk_index(xas.xa_index));
143 xa_erase_index(xa, 0);
144 xa_erase_index(xa, 1);
147 static noinline void check_xa_load(struct xarray *xa)
151 for (i = 0; i < 1024; i++) {
152 for (j = 0; j < 1024; j++) {
153 void *entry = xa_load(xa, j);
155 XA_BUG_ON(xa, xa_to_value(entry) != j);
157 XA_BUG_ON(xa, entry);
159 XA_BUG_ON(xa, xa_store_index(xa, i, GFP_KERNEL) != NULL);
162 for (i = 0; i < 1024; i++) {
163 for (j = 0; j < 1024; j++) {
164 void *entry = xa_load(xa, j);
166 XA_BUG_ON(xa, xa_to_value(entry) != j);
168 XA_BUG_ON(xa, entry);
170 xa_erase_index(xa, i);
172 XA_BUG_ON(xa, !xa_empty(xa));
175 static noinline void check_xa_mark_1(struct xarray *xa, unsigned long index)
178 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 8 : 1;
180 /* NULL elements have no marks set */
181 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
182 xa_set_mark(xa, index, XA_MARK_0);
183 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
185 /* Storing a pointer will not make a mark appear */
186 XA_BUG_ON(xa, xa_store_index(xa, index, GFP_KERNEL) != NULL);
187 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
188 xa_set_mark(xa, index, XA_MARK_0);
189 XA_BUG_ON(xa, !xa_get_mark(xa, index, XA_MARK_0));
191 /* Setting one mark will not set another mark */
192 XA_BUG_ON(xa, xa_get_mark(xa, index + 1, XA_MARK_0));
193 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_1));
195 /* Storing NULL clears marks, and they can't be set again */
196 xa_erase_index(xa, index);
197 XA_BUG_ON(xa, !xa_empty(xa));
198 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
199 xa_set_mark(xa, index, XA_MARK_0);
200 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
203 * Storing a multi-index entry over entries with marks gives the
204 * entire entry the union of the marks
206 BUG_ON((index % 4) != 0);
207 for (order = 2; order < max_order; order++) {
208 unsigned long base = round_down(index, 1UL << order);
209 unsigned long next = base + (1UL << order);
212 XA_BUG_ON(xa, xa_store_index(xa, index + 1, GFP_KERNEL));
213 xa_set_mark(xa, index + 1, XA_MARK_0);
214 XA_BUG_ON(xa, xa_store_index(xa, index + 2, GFP_KERNEL));
215 xa_set_mark(xa, index + 2, XA_MARK_2);
216 XA_BUG_ON(xa, xa_store_index(xa, next, GFP_KERNEL));
217 xa_store_order(xa, index, order, xa_mk_index(index),
219 for (i = base; i < next; i++) {
220 XA_STATE(xas, xa, i);
221 unsigned int seen = 0;
224 XA_BUG_ON(xa, !xa_get_mark(xa, i, XA_MARK_0));
225 XA_BUG_ON(xa, xa_get_mark(xa, i, XA_MARK_1));
226 XA_BUG_ON(xa, !xa_get_mark(xa, i, XA_MARK_2));
228 /* We should see two elements in the array */
230 xas_for_each(&xas, entry, ULONG_MAX)
233 XA_BUG_ON(xa, seen != 2);
235 /* One of which is marked */
239 xas_for_each_marked(&xas, entry, ULONG_MAX, XA_MARK_0)
242 XA_BUG_ON(xa, seen != 1);
244 XA_BUG_ON(xa, xa_get_mark(xa, next, XA_MARK_0));
245 XA_BUG_ON(xa, xa_get_mark(xa, next, XA_MARK_1));
246 XA_BUG_ON(xa, xa_get_mark(xa, next, XA_MARK_2));
247 xa_erase_index(xa, index);
248 xa_erase_index(xa, next);
249 XA_BUG_ON(xa, !xa_empty(xa));
251 XA_BUG_ON(xa, !xa_empty(xa));
254 static noinline void check_xa_mark_2(struct xarray *xa)
256 XA_STATE(xas, xa, 0);
258 unsigned int count = 0;
261 xa_store_index(xa, 0, GFP_KERNEL);
262 xa_set_mark(xa, 0, XA_MARK_0);
265 xas_init_marks(&xas);
267 XA_BUG_ON(xa, !xa_get_mark(xa, 0, XA_MARK_0) == 0);
269 for (index = 3500; index < 4500; index++) {
270 xa_store_index(xa, index, GFP_KERNEL);
271 xa_set_mark(xa, index, XA_MARK_0);
276 xas_for_each_marked(&xas, entry, ULONG_MAX, XA_MARK_0)
279 XA_BUG_ON(xa, count != 1000);
282 xas_for_each(&xas, entry, ULONG_MAX) {
283 xas_init_marks(&xas);
284 XA_BUG_ON(xa, !xa_get_mark(xa, xas.xa_index, XA_MARK_0));
285 XA_BUG_ON(xa, !xas_get_mark(&xas, XA_MARK_0));
292 static noinline void check_xa_mark(struct xarray *xa)
296 for (index = 0; index < 16384; index += 4)
297 check_xa_mark_1(xa, index);
302 static noinline void check_xa_shrink(struct xarray *xa)
304 XA_STATE(xas, xa, 1);
305 struct xa_node *node;
307 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 15 : 1;
309 XA_BUG_ON(xa, !xa_empty(xa));
310 XA_BUG_ON(xa, xa_store_index(xa, 0, GFP_KERNEL) != NULL);
311 XA_BUG_ON(xa, xa_store_index(xa, 1, GFP_KERNEL) != NULL);
314 * Check that erasing the entry at 1 shrinks the tree and properly
315 * marks the node as being deleted.
318 XA_BUG_ON(xa, xas_load(&xas) != xa_mk_value(1));
320 XA_BUG_ON(xa, xa_entry_locked(xa, node, 0) != xa_mk_value(0));
321 XA_BUG_ON(xa, xas_store(&xas, NULL) != xa_mk_value(1));
322 XA_BUG_ON(xa, xa_load(xa, 1) != NULL);
323 XA_BUG_ON(xa, xas.xa_node != XAS_BOUNDS);
324 XA_BUG_ON(xa, xa_entry_locked(xa, node, 0) != XA_RETRY_ENTRY);
325 XA_BUG_ON(xa, xas_load(&xas) != NULL);
327 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(0));
328 xa_erase_index(xa, 0);
329 XA_BUG_ON(xa, !xa_empty(xa));
331 for (order = 0; order < max_order; order++) {
332 unsigned long max = (1UL << order) - 1;
333 xa_store_order(xa, 0, order, xa_mk_value(0), GFP_KERNEL);
334 XA_BUG_ON(xa, xa_load(xa, max) != xa_mk_value(0));
335 XA_BUG_ON(xa, xa_load(xa, max + 1) != NULL);
339 XA_BUG_ON(xa, xa_store_index(xa, ULONG_MAX, GFP_KERNEL) !=
342 XA_BUG_ON(xa, xa_head(xa) == node);
344 XA_BUG_ON(xa, xa_load(xa, max + 1) != NULL);
345 xa_erase_index(xa, ULONG_MAX);
346 XA_BUG_ON(xa, xa->xa_head != node);
347 xa_erase_index(xa, 0);
351 static noinline void check_insert(struct xarray *xa)
355 for (i = 0; i < 1024; i++) {
356 xa_insert_index(xa, i);
357 XA_BUG_ON(xa, xa_load(xa, i - 1) != NULL);
358 XA_BUG_ON(xa, xa_load(xa, i + 1) != NULL);
359 xa_erase_index(xa, i);
362 for (i = 10; i < BITS_PER_LONG; i++) {
363 xa_insert_index(xa, 1UL << i);
364 XA_BUG_ON(xa, xa_load(xa, (1UL << i) - 1) != NULL);
365 XA_BUG_ON(xa, xa_load(xa, (1UL << i) + 1) != NULL);
366 xa_erase_index(xa, 1UL << i);
368 xa_insert_index(xa, (1UL << i) - 1);
369 XA_BUG_ON(xa, xa_load(xa, (1UL << i) - 2) != NULL);
370 XA_BUG_ON(xa, xa_load(xa, 1UL << i) != NULL);
371 xa_erase_index(xa, (1UL << i) - 1);
374 xa_insert_index(xa, ~0UL);
375 XA_BUG_ON(xa, xa_load(xa, 0UL) != NULL);
376 XA_BUG_ON(xa, xa_load(xa, ~1UL) != NULL);
377 xa_erase_index(xa, ~0UL);
379 XA_BUG_ON(xa, !xa_empty(xa));
382 static noinline void check_cmpxchg(struct xarray *xa)
384 void *FIVE = xa_mk_value(5);
385 void *SIX = xa_mk_value(6);
386 void *LOTS = xa_mk_value(12345678);
388 XA_BUG_ON(xa, !xa_empty(xa));
389 XA_BUG_ON(xa, xa_store_index(xa, 12345678, GFP_KERNEL) != NULL);
390 XA_BUG_ON(xa, xa_insert(xa, 12345678, xa, GFP_KERNEL) != -EBUSY);
391 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, SIX, FIVE, GFP_KERNEL) != LOTS);
392 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, LOTS, FIVE, GFP_KERNEL) != LOTS);
393 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, FIVE, LOTS, GFP_KERNEL) != FIVE);
394 XA_BUG_ON(xa, xa_cmpxchg(xa, 5, FIVE, NULL, GFP_KERNEL) != NULL);
395 XA_BUG_ON(xa, xa_cmpxchg(xa, 5, NULL, FIVE, GFP_KERNEL) != NULL);
396 xa_erase_index(xa, 12345678);
397 xa_erase_index(xa, 5);
398 XA_BUG_ON(xa, !xa_empty(xa));
401 static noinline void check_reserve(struct xarray *xa)
407 /* An array with a reserved entry is not empty */
408 XA_BUG_ON(xa, !xa_empty(xa));
409 XA_BUG_ON(xa, xa_reserve(xa, 12345678, GFP_KERNEL) != 0);
410 XA_BUG_ON(xa, xa_empty(xa));
411 XA_BUG_ON(xa, xa_load(xa, 12345678));
412 xa_release(xa, 12345678);
413 XA_BUG_ON(xa, !xa_empty(xa));
415 /* Releasing a used entry does nothing */
416 XA_BUG_ON(xa, xa_reserve(xa, 12345678, GFP_KERNEL) != 0);
417 XA_BUG_ON(xa, xa_store_index(xa, 12345678, GFP_NOWAIT) != NULL);
418 xa_release(xa, 12345678);
419 xa_erase_index(xa, 12345678);
420 XA_BUG_ON(xa, !xa_empty(xa));
422 /* cmpxchg sees a reserved entry as ZERO */
423 XA_BUG_ON(xa, xa_reserve(xa, 12345678, GFP_KERNEL) != 0);
424 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, XA_ZERO_ENTRY,
425 xa_mk_value(12345678), GFP_NOWAIT) != NULL);
426 xa_release(xa, 12345678);
427 xa_erase_index(xa, 12345678);
428 XA_BUG_ON(xa, !xa_empty(xa));
430 /* xa_insert treats it as busy */
431 XA_BUG_ON(xa, xa_reserve(xa, 12345678, GFP_KERNEL) != 0);
432 XA_BUG_ON(xa, xa_insert(xa, 12345678, xa_mk_value(12345678), 0) !=
434 XA_BUG_ON(xa, xa_empty(xa));
435 XA_BUG_ON(xa, xa_erase(xa, 12345678) != NULL);
436 XA_BUG_ON(xa, !xa_empty(xa));
438 /* Can iterate through a reserved entry */
439 xa_store_index(xa, 5, GFP_KERNEL);
440 XA_BUG_ON(xa, xa_reserve(xa, 6, GFP_KERNEL) != 0);
441 xa_store_index(xa, 7, GFP_KERNEL);
444 xa_for_each(xa, index, entry) {
445 XA_BUG_ON(xa, index != 5 && index != 7);
448 XA_BUG_ON(xa, count != 2);
450 /* If we free a reserved entry, we should be able to allocate it */
451 if (xa->xa_flags & XA_FLAGS_ALLOC) {
454 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_value(8),
455 XA_LIMIT(5, 10), GFP_KERNEL) != 0);
456 XA_BUG_ON(xa, id != 8);
459 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_value(6),
460 XA_LIMIT(5, 10), GFP_KERNEL) != 0);
461 XA_BUG_ON(xa, id != 6);
467 static noinline void check_xas_erase(struct xarray *xa)
469 XA_STATE(xas, xa, 0);
473 for (i = 0; i < 200; i++) {
474 for (j = i; j < 2 * i + 17; j++) {
478 xas_store(&xas, xa_mk_index(j));
480 } while (xas_nomem(&xas, GFP_KERNEL));
483 xas_set(&xas, ULONG_MAX);
486 xas_store(&xas, xa_mk_value(0));
488 } while (xas_nomem(&xas, GFP_KERNEL));
491 xas_store(&xas, NULL);
495 xas_for_each(&xas, entry, ULONG_MAX) {
496 XA_BUG_ON(xa, entry != xa_mk_index(j));
497 xas_store(&xas, NULL);
501 XA_BUG_ON(xa, !xa_empty(xa));
505 #ifdef CONFIG_XARRAY_MULTI
506 static noinline void check_multi_store_1(struct xarray *xa, unsigned long index,
509 XA_STATE(xas, xa, index);
510 unsigned long min = index & ~((1UL << order) - 1);
511 unsigned long max = min + (1UL << order);
513 xa_store_order(xa, index, order, xa_mk_index(index), GFP_KERNEL);
514 XA_BUG_ON(xa, xa_load(xa, min) != xa_mk_index(index));
515 XA_BUG_ON(xa, xa_load(xa, max - 1) != xa_mk_index(index));
516 XA_BUG_ON(xa, xa_load(xa, max) != NULL);
517 XA_BUG_ON(xa, xa_load(xa, min - 1) != NULL);
520 XA_BUG_ON(xa, xas_store(&xas, xa_mk_index(min)) != xa_mk_index(index));
522 XA_BUG_ON(xa, xa_load(xa, min) != xa_mk_index(min));
523 XA_BUG_ON(xa, xa_load(xa, max - 1) != xa_mk_index(min));
524 XA_BUG_ON(xa, xa_load(xa, max) != NULL);
525 XA_BUG_ON(xa, xa_load(xa, min - 1) != NULL);
527 xa_erase_index(xa, min);
528 XA_BUG_ON(xa, !xa_empty(xa));
531 static noinline void check_multi_store_2(struct xarray *xa, unsigned long index,
534 XA_STATE(xas, xa, index);
535 xa_store_order(xa, index, order, xa_mk_value(0), GFP_KERNEL);
538 XA_BUG_ON(xa, xas_store(&xas, xa_mk_value(1)) != xa_mk_value(0));
539 XA_BUG_ON(xa, xas.xa_index != index);
540 XA_BUG_ON(xa, xas_store(&xas, NULL) != xa_mk_value(1));
542 XA_BUG_ON(xa, !xa_empty(xa));
545 static noinline void check_multi_store_3(struct xarray *xa, unsigned long index,
548 XA_STATE(xas, xa, 0);
552 xa_store_order(xa, index, order, xa_mk_index(index), GFP_KERNEL);
555 xas_for_each(&xas, entry, ULONG_MAX) {
556 XA_BUG_ON(xa, entry != xa_mk_index(index));
559 XA_BUG_ON(xa, n != 1);
560 xas_set(&xas, index + 1);
561 xas_for_each(&xas, entry, ULONG_MAX) {
562 XA_BUG_ON(xa, entry != xa_mk_index(index));
565 XA_BUG_ON(xa, n != 2);
572 static noinline void check_multi_store(struct xarray *xa)
574 #ifdef CONFIG_XARRAY_MULTI
575 unsigned long i, j, k;
576 unsigned int max_order = (sizeof(long) == 4) ? 30 : 60;
578 /* Loading from any position returns the same value */
579 xa_store_order(xa, 0, 1, xa_mk_value(0), GFP_KERNEL);
580 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(0));
581 XA_BUG_ON(xa, xa_load(xa, 1) != xa_mk_value(0));
582 XA_BUG_ON(xa, xa_load(xa, 2) != NULL);
584 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->count != 2);
585 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->nr_values != 2);
588 /* Storing adjacent to the value does not alter the value */
589 xa_store(xa, 3, xa, GFP_KERNEL);
590 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(0));
591 XA_BUG_ON(xa, xa_load(xa, 1) != xa_mk_value(0));
592 XA_BUG_ON(xa, xa_load(xa, 2) != NULL);
594 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->count != 3);
595 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->nr_values != 2);
598 /* Overwriting multiple indexes works */
599 xa_store_order(xa, 0, 2, xa_mk_value(1), GFP_KERNEL);
600 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(1));
601 XA_BUG_ON(xa, xa_load(xa, 1) != xa_mk_value(1));
602 XA_BUG_ON(xa, xa_load(xa, 2) != xa_mk_value(1));
603 XA_BUG_ON(xa, xa_load(xa, 3) != xa_mk_value(1));
604 XA_BUG_ON(xa, xa_load(xa, 4) != NULL);
606 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->count != 4);
607 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->nr_values != 4);
610 /* We can erase multiple values with a single store */
611 xa_store_order(xa, 0, BITS_PER_LONG - 1, NULL, GFP_KERNEL);
612 XA_BUG_ON(xa, !xa_empty(xa));
614 /* Even when the first slot is empty but the others aren't */
615 xa_store_index(xa, 1, GFP_KERNEL);
616 xa_store_index(xa, 2, GFP_KERNEL);
617 xa_store_order(xa, 0, 2, NULL, GFP_KERNEL);
618 XA_BUG_ON(xa, !xa_empty(xa));
620 for (i = 0; i < max_order; i++) {
621 for (j = 0; j < max_order; j++) {
622 xa_store_order(xa, 0, i, xa_mk_index(i), GFP_KERNEL);
623 xa_store_order(xa, 0, j, xa_mk_index(j), GFP_KERNEL);
625 for (k = 0; k < max_order; k++) {
626 void *entry = xa_load(xa, (1UL << k) - 1);
627 if ((i < k) && (j < k))
628 XA_BUG_ON(xa, entry != NULL);
630 XA_BUG_ON(xa, entry != xa_mk_index(j));
634 XA_BUG_ON(xa, !xa_empty(xa));
638 for (i = 0; i < 20; i++) {
639 check_multi_store_1(xa, 200, i);
640 check_multi_store_1(xa, 0, i);
641 check_multi_store_1(xa, (1UL << i) + 1, i);
643 check_multi_store_2(xa, 4095, 9);
645 for (i = 1; i < 20; i++) {
646 check_multi_store_3(xa, 0, i);
647 check_multi_store_3(xa, 1UL << i, i);
652 static noinline void check_xa_alloc_1(struct xarray *xa, unsigned int base)
657 XA_BUG_ON(xa, !xa_empty(xa));
658 /* An empty array should assign %base to the first alloc */
659 xa_alloc_index(xa, base, GFP_KERNEL);
661 /* Erasing it should make the array empty again */
662 xa_erase_index(xa, base);
663 XA_BUG_ON(xa, !xa_empty(xa));
665 /* And it should assign %base again */
666 xa_alloc_index(xa, base, GFP_KERNEL);
668 /* Allocating and then erasing a lot should not lose base */
669 for (i = base + 1; i < 2 * XA_CHUNK_SIZE; i++)
670 xa_alloc_index(xa, i, GFP_KERNEL);
671 for (i = base; i < 2 * XA_CHUNK_SIZE; i++)
672 xa_erase_index(xa, i);
673 xa_alloc_index(xa, base, GFP_KERNEL);
675 /* Destroying the array should do the same as erasing */
678 /* And it should assign %base again */
679 xa_alloc_index(xa, base, GFP_KERNEL);
681 /* The next assigned ID should be base+1 */
682 xa_alloc_index(xa, base + 1, GFP_KERNEL);
683 xa_erase_index(xa, base + 1);
685 /* Storing a value should mark it used */
686 xa_store_index(xa, base + 1, GFP_KERNEL);
687 xa_alloc_index(xa, base + 2, GFP_KERNEL);
689 /* If we then erase base, it should be free */
690 xa_erase_index(xa, base);
691 xa_alloc_index(xa, base, GFP_KERNEL);
693 xa_erase_index(xa, base + 1);
694 xa_erase_index(xa, base + 2);
696 for (i = 1; i < 5000; i++) {
697 xa_alloc_index(xa, base + i, GFP_KERNEL);
702 /* Check that we fail properly at the limit of allocation */
703 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(UINT_MAX - 1),
704 XA_LIMIT(UINT_MAX - 1, UINT_MAX),
706 XA_BUG_ON(xa, id != 0xfffffffeU);
707 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(UINT_MAX),
708 XA_LIMIT(UINT_MAX - 1, UINT_MAX),
710 XA_BUG_ON(xa, id != 0xffffffffU);
712 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(0),
713 XA_LIMIT(UINT_MAX - 1, UINT_MAX),
714 GFP_KERNEL) != -EBUSY);
715 XA_BUG_ON(xa, id != 3);
718 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(10), XA_LIMIT(10, 5),
719 GFP_KERNEL) != -EBUSY);
720 XA_BUG_ON(xa, xa_store_index(xa, 3, GFP_KERNEL) != 0);
721 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(10), XA_LIMIT(10, 5),
722 GFP_KERNEL) != -EBUSY);
723 xa_erase_index(xa, 3);
724 XA_BUG_ON(xa, !xa_empty(xa));
727 static noinline void check_xa_alloc_2(struct xarray *xa, unsigned int base)
733 /* Allocate and free a NULL and check xa_empty() behaves */
734 XA_BUG_ON(xa, !xa_empty(xa));
735 XA_BUG_ON(xa, xa_alloc(xa, &id, NULL, xa_limit_32b, GFP_KERNEL) != 0);
736 XA_BUG_ON(xa, id != base);
737 XA_BUG_ON(xa, xa_empty(xa));
738 XA_BUG_ON(xa, xa_erase(xa, id) != NULL);
739 XA_BUG_ON(xa, !xa_empty(xa));
741 /* Ditto, but check destroy instead of erase */
742 XA_BUG_ON(xa, !xa_empty(xa));
743 XA_BUG_ON(xa, xa_alloc(xa, &id, NULL, xa_limit_32b, GFP_KERNEL) != 0);
744 XA_BUG_ON(xa, id != base);
745 XA_BUG_ON(xa, xa_empty(xa));
747 XA_BUG_ON(xa, !xa_empty(xa));
749 for (i = base; i < base + 10; i++) {
750 XA_BUG_ON(xa, xa_alloc(xa, &id, NULL, xa_limit_32b,
752 XA_BUG_ON(xa, id != i);
755 XA_BUG_ON(xa, xa_store(xa, 3, xa_mk_index(3), GFP_KERNEL) != NULL);
756 XA_BUG_ON(xa, xa_store(xa, 4, xa_mk_index(4), GFP_KERNEL) != NULL);
757 XA_BUG_ON(xa, xa_store(xa, 4, NULL, GFP_KERNEL) != xa_mk_index(4));
758 XA_BUG_ON(xa, xa_erase(xa, 5) != NULL);
759 XA_BUG_ON(xa, xa_alloc(xa, &id, NULL, xa_limit_32b, GFP_KERNEL) != 0);
760 XA_BUG_ON(xa, id != 5);
762 xa_for_each(xa, index, entry) {
763 xa_erase_index(xa, index);
766 for (i = base; i < base + 9; i++) {
767 XA_BUG_ON(xa, xa_erase(xa, i) != NULL);
768 XA_BUG_ON(xa, xa_empty(xa));
770 XA_BUG_ON(xa, xa_erase(xa, 8) != NULL);
771 XA_BUG_ON(xa, xa_empty(xa));
772 XA_BUG_ON(xa, xa_erase(xa, base + 9) != NULL);
773 XA_BUG_ON(xa, !xa_empty(xa));
778 static noinline void check_xa_alloc_3(struct xarray *xa, unsigned int base)
780 struct xa_limit limit = XA_LIMIT(1, 0x3fff);
786 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, xa_mk_index(1), limit,
787 &next, GFP_KERNEL) != 0);
788 XA_BUG_ON(xa, id != 1);
791 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, xa_mk_index(0x3ffd), limit,
792 &next, GFP_KERNEL) != 0);
793 XA_BUG_ON(xa, id != 0x3ffd);
794 xa_erase_index(xa, 0x3ffd);
795 xa_erase_index(xa, 1);
796 XA_BUG_ON(xa, !xa_empty(xa));
798 for (i = 0x3ffe; i < 0x4003; i++) {
800 entry = xa_mk_index(i);
802 entry = xa_mk_index(i - 0x3fff);
803 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, entry, limit,
804 &next, GFP_KERNEL) != (id == 1));
805 XA_BUG_ON(xa, xa_mk_index(id) != entry);
808 /* Check wrap-around is handled correctly */
810 xa_erase_index(xa, base);
811 xa_erase_index(xa, base + 1);
813 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, xa_mk_index(UINT_MAX),
814 xa_limit_32b, &next, GFP_KERNEL) != 0);
815 XA_BUG_ON(xa, id != UINT_MAX);
816 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, xa_mk_index(base),
817 xa_limit_32b, &next, GFP_KERNEL) != 1);
818 XA_BUG_ON(xa, id != base);
819 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, xa_mk_index(base + 1),
820 xa_limit_32b, &next, GFP_KERNEL) != 0);
821 XA_BUG_ON(xa, id != base + 1);
823 xa_for_each(xa, index, entry)
824 xa_erase_index(xa, index);
826 XA_BUG_ON(xa, !xa_empty(xa));
829 static DEFINE_XARRAY_ALLOC(xa0);
830 static DEFINE_XARRAY_ALLOC1(xa1);
832 static noinline void check_xa_alloc(void)
834 check_xa_alloc_1(&xa0, 0);
835 check_xa_alloc_1(&xa1, 1);
836 check_xa_alloc_2(&xa0, 0);
837 check_xa_alloc_2(&xa1, 1);
838 check_xa_alloc_3(&xa0, 0);
839 check_xa_alloc_3(&xa1, 1);
842 static noinline void __check_store_iter(struct xarray *xa, unsigned long start,
843 unsigned int order, unsigned int present)
845 XA_STATE_ORDER(xas, xa, start, order);
847 unsigned int count = 0;
851 xas_for_each_conflict(&xas, entry) {
852 XA_BUG_ON(xa, !xa_is_value(entry));
853 XA_BUG_ON(xa, entry < xa_mk_index(start));
854 XA_BUG_ON(xa, entry > xa_mk_index(start + (1UL << order) - 1));
857 xas_store(&xas, xa_mk_index(start));
859 if (xas_nomem(&xas, GFP_KERNEL)) {
863 XA_BUG_ON(xa, xas_error(&xas));
864 XA_BUG_ON(xa, count != present);
865 XA_BUG_ON(xa, xa_load(xa, start) != xa_mk_index(start));
866 XA_BUG_ON(xa, xa_load(xa, start + (1UL << order) - 1) !=
868 xa_erase_index(xa, start);
871 static noinline void check_store_iter(struct xarray *xa)
874 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 20 : 1;
876 for (i = 0; i < max_order; i++) {
877 unsigned int min = 1 << i;
878 unsigned int max = (2 << i) - 1;
879 __check_store_iter(xa, 0, i, 0);
880 XA_BUG_ON(xa, !xa_empty(xa));
881 __check_store_iter(xa, min, i, 0);
882 XA_BUG_ON(xa, !xa_empty(xa));
884 xa_store_index(xa, min, GFP_KERNEL);
885 __check_store_iter(xa, min, i, 1);
886 XA_BUG_ON(xa, !xa_empty(xa));
887 xa_store_index(xa, max, GFP_KERNEL);
888 __check_store_iter(xa, min, i, 1);
889 XA_BUG_ON(xa, !xa_empty(xa));
891 for (j = 0; j < min; j++)
892 xa_store_index(xa, j, GFP_KERNEL);
893 __check_store_iter(xa, 0, i, min);
894 XA_BUG_ON(xa, !xa_empty(xa));
895 for (j = 0; j < min; j++)
896 xa_store_index(xa, min + j, GFP_KERNEL);
897 __check_store_iter(xa, min, i, min);
898 XA_BUG_ON(xa, !xa_empty(xa));
900 #ifdef CONFIG_XARRAY_MULTI
901 xa_store_index(xa, 63, GFP_KERNEL);
902 xa_store_index(xa, 65, GFP_KERNEL);
903 __check_store_iter(xa, 64, 2, 1);
904 xa_erase_index(xa, 63);
906 XA_BUG_ON(xa, !xa_empty(xa));
909 static noinline void check_multi_find_1(struct xarray *xa, unsigned order)
911 #ifdef CONFIG_XARRAY_MULTI
912 unsigned long multi = 3 << order;
913 unsigned long next = 4 << order;
916 xa_store_order(xa, multi, order, xa_mk_value(multi), GFP_KERNEL);
917 XA_BUG_ON(xa, xa_store_index(xa, next, GFP_KERNEL) != NULL);
918 XA_BUG_ON(xa, xa_store_index(xa, next + 1, GFP_KERNEL) != NULL);
921 XA_BUG_ON(xa, xa_find(xa, &index, ULONG_MAX, XA_PRESENT) !=
923 XA_BUG_ON(xa, index != multi);
925 XA_BUG_ON(xa, xa_find(xa, &index, ULONG_MAX, XA_PRESENT) !=
927 XA_BUG_ON(xa, (index < multi) || (index >= next));
928 XA_BUG_ON(xa, xa_find_after(xa, &index, ULONG_MAX, XA_PRESENT) !=
930 XA_BUG_ON(xa, index != next);
931 XA_BUG_ON(xa, xa_find_after(xa, &index, next, XA_PRESENT) != NULL);
932 XA_BUG_ON(xa, index != next);
934 xa_erase_index(xa, multi);
935 xa_erase_index(xa, next);
936 xa_erase_index(xa, next + 1);
937 XA_BUG_ON(xa, !xa_empty(xa));
941 static noinline void check_multi_find_2(struct xarray *xa)
943 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 10 : 1;
947 for (i = 0; i < max_order; i++) {
948 unsigned long index = 1UL << i;
949 for (j = 0; j < index; j++) {
950 XA_STATE(xas, xa, j + index);
951 xa_store_index(xa, index - 1, GFP_KERNEL);
952 xa_store_order(xa, index, i, xa_mk_index(index),
955 xas_for_each(&xas, entry, ULONG_MAX) {
956 xa_erase_index(xa, index);
959 xa_erase_index(xa, index - 1);
960 XA_BUG_ON(xa, !xa_empty(xa));
965 static noinline void check_multi_find_3(struct xarray *xa)
969 for (order = 5; order < order_limit; order++) {
970 unsigned long index = 1UL << (order - 5);
972 XA_BUG_ON(xa, !xa_empty(xa));
973 xa_store_order(xa, 0, order - 4, xa_mk_index(0), GFP_KERNEL);
974 XA_BUG_ON(xa, xa_find_after(xa, &index, ULONG_MAX, XA_PRESENT));
975 xa_erase_index(xa, 0);
979 static noinline void check_find_1(struct xarray *xa)
981 unsigned long i, j, k;
983 XA_BUG_ON(xa, !xa_empty(xa));
986 * Check xa_find with all pairs between 0 and 99 inclusive,
987 * starting at every index between 0 and 99
989 for (i = 0; i < 100; i++) {
990 XA_BUG_ON(xa, xa_store_index(xa, i, GFP_KERNEL) != NULL);
991 xa_set_mark(xa, i, XA_MARK_0);
992 for (j = 0; j < i; j++) {
993 XA_BUG_ON(xa, xa_store_index(xa, j, GFP_KERNEL) !=
995 xa_set_mark(xa, j, XA_MARK_0);
996 for (k = 0; k < 100; k++) {
997 unsigned long index = k;
998 void *entry = xa_find(xa, &index, ULONG_MAX,
1001 XA_BUG_ON(xa, index != j);
1003 XA_BUG_ON(xa, index != i);
1005 XA_BUG_ON(xa, entry != NULL);
1008 entry = xa_find(xa, &index, ULONG_MAX,
1011 XA_BUG_ON(xa, index != j);
1013 XA_BUG_ON(xa, index != i);
1015 XA_BUG_ON(xa, entry != NULL);
1017 xa_erase_index(xa, j);
1018 XA_BUG_ON(xa, xa_get_mark(xa, j, XA_MARK_0));
1019 XA_BUG_ON(xa, !xa_get_mark(xa, i, XA_MARK_0));
1021 xa_erase_index(xa, i);
1022 XA_BUG_ON(xa, xa_get_mark(xa, i, XA_MARK_0));
1024 XA_BUG_ON(xa, !xa_empty(xa));
1027 static noinline void check_find_2(struct xarray *xa)
1030 unsigned long i, j, index;
1032 xa_for_each(xa, index, entry) {
1033 XA_BUG_ON(xa, true);
1036 for (i = 0; i < 1024; i++) {
1037 xa_store_index(xa, index, GFP_KERNEL);
1039 xa_for_each(xa, index, entry) {
1040 XA_BUG_ON(xa, xa_mk_index(index) != entry);
1041 XA_BUG_ON(xa, index != j++);
1048 static noinline void check_find_3(struct xarray *xa)
1050 XA_STATE(xas, xa, 0);
1051 unsigned long i, j, k;
1054 for (i = 0; i < 100; i++) {
1055 for (j = 0; j < 100; j++) {
1057 for (k = 0; k < 100; k++) {
1059 xas_for_each_marked(&xas, entry, k, XA_MARK_0)
1063 xas.xa_node != XAS_RESTART);
1067 xa_store_index(xa, i, GFP_KERNEL);
1068 xa_set_mark(xa, i, XA_MARK_0);
1073 static noinline void check_find_4(struct xarray *xa)
1075 unsigned long index = 0;
1078 xa_store_index(xa, ULONG_MAX, GFP_KERNEL);
1080 entry = xa_find_after(xa, &index, ULONG_MAX, XA_PRESENT);
1081 XA_BUG_ON(xa, entry != xa_mk_index(ULONG_MAX));
1083 entry = xa_find_after(xa, &index, ULONG_MAX, XA_PRESENT);
1084 XA_BUG_ON(xa, entry);
1086 xa_erase_index(xa, ULONG_MAX);
1089 static noinline void check_find(struct xarray *xa)
1098 for (i = 2; i < 10; i++)
1099 check_multi_find_1(xa, i);
1100 check_multi_find_2(xa);
1101 check_multi_find_3(xa);
1104 /* See find_swap_entry() in mm/shmem.c */
1105 static noinline unsigned long xa_find_entry(struct xarray *xa, void *item)
1107 XA_STATE(xas, xa, 0);
1108 unsigned int checked = 0;
1112 xas_for_each(&xas, entry, ULONG_MAX) {
1113 if (xas_retry(&xas, entry))
1118 if ((checked % 4) != 0)
1124 return entry ? xas.xa_index : -1;
1127 static noinline void check_find_entry(struct xarray *xa)
1129 #ifdef CONFIG_XARRAY_MULTI
1131 unsigned long offset, index;
1133 for (order = 0; order < 20; order++) {
1134 for (offset = 0; offset < (1UL << (order + 3));
1135 offset += (1UL << order)) {
1136 for (index = 0; index < (1UL << (order + 5));
1137 index += (1UL << order)) {
1138 xa_store_order(xa, index, order,
1139 xa_mk_index(index), GFP_KERNEL);
1140 XA_BUG_ON(xa, xa_load(xa, index) !=
1141 xa_mk_index(index));
1142 XA_BUG_ON(xa, xa_find_entry(xa,
1143 xa_mk_index(index)) != index);
1145 XA_BUG_ON(xa, xa_find_entry(xa, xa) != -1);
1151 XA_BUG_ON(xa, xa_find_entry(xa, xa) != -1);
1152 xa_store_index(xa, ULONG_MAX, GFP_KERNEL);
1153 XA_BUG_ON(xa, xa_find_entry(xa, xa) != -1);
1154 XA_BUG_ON(xa, xa_find_entry(xa, xa_mk_index(ULONG_MAX)) != -1);
1155 xa_erase_index(xa, ULONG_MAX);
1156 XA_BUG_ON(xa, !xa_empty(xa));
1159 static noinline void check_pause(struct xarray *xa)
1161 XA_STATE(xas, xa, 0);
1164 unsigned long index = 1;
1165 unsigned int count = 0;
1167 for (order = 0; order < order_limit; order++) {
1168 XA_BUG_ON(xa, xa_store_order(xa, index, order,
1169 xa_mk_index(index), GFP_KERNEL));
1170 index += 1UL << order;
1174 xas_for_each(&xas, entry, ULONG_MAX) {
1175 XA_BUG_ON(xa, entry != xa_mk_index(1UL << count));
1179 XA_BUG_ON(xa, count != order_limit);
1184 xas_for_each(&xas, entry, ULONG_MAX) {
1185 XA_BUG_ON(xa, entry != xa_mk_index(1UL << count));
1190 XA_BUG_ON(xa, count != order_limit);
1195 static noinline void check_move_tiny(struct xarray *xa)
1197 XA_STATE(xas, xa, 0);
1199 XA_BUG_ON(xa, !xa_empty(xa));
1201 XA_BUG_ON(xa, xas_next(&xas) != NULL);
1202 XA_BUG_ON(xa, xas_next(&xas) != NULL);
1204 xa_store_index(xa, 0, GFP_KERNEL);
1207 XA_BUG_ON(xa, xas_next(&xas) != xa_mk_index(0));
1208 XA_BUG_ON(xa, xas_next(&xas) != NULL);
1210 XA_BUG_ON(xa, xas_prev(&xas) != xa_mk_index(0));
1211 XA_BUG_ON(xa, xas_prev(&xas) != NULL);
1213 xa_erase_index(xa, 0);
1214 XA_BUG_ON(xa, !xa_empty(xa));
1217 static noinline void check_move_max(struct xarray *xa)
1219 XA_STATE(xas, xa, 0);
1221 xa_store_index(xa, ULONG_MAX, GFP_KERNEL);
1223 XA_BUG_ON(xa, xas_find(&xas, ULONG_MAX) != xa_mk_index(ULONG_MAX));
1224 XA_BUG_ON(xa, xas_find(&xas, ULONG_MAX) != NULL);
1229 XA_BUG_ON(xa, xas_find(&xas, ULONG_MAX) != xa_mk_index(ULONG_MAX));
1231 XA_BUG_ON(xa, xas_find(&xas, ULONG_MAX) != NULL);
1234 xa_erase_index(xa, ULONG_MAX);
1235 XA_BUG_ON(xa, !xa_empty(xa));
1238 static noinline void check_move_small(struct xarray *xa, unsigned long idx)
1240 XA_STATE(xas, xa, 0);
1243 xa_store_index(xa, 0, GFP_KERNEL);
1244 xa_store_index(xa, idx, GFP_KERNEL);
1247 for (i = 0; i < idx * 4; i++) {
1248 void *entry = xas_next(&xas);
1250 XA_BUG_ON(xa, xas.xa_node == XAS_RESTART);
1251 XA_BUG_ON(xa, xas.xa_index != i);
1252 if (i == 0 || i == idx)
1253 XA_BUG_ON(xa, entry != xa_mk_index(i));
1255 XA_BUG_ON(xa, entry != NULL);
1258 XA_BUG_ON(xa, xas.xa_index != i);
1261 void *entry = xas_prev(&xas);
1264 XA_BUG_ON(xa, xas.xa_node == XAS_RESTART);
1265 XA_BUG_ON(xa, xas.xa_index != i);
1266 if (i == 0 || i == idx)
1267 XA_BUG_ON(xa, entry != xa_mk_index(i));
1269 XA_BUG_ON(xa, entry != NULL);
1272 xas_set(&xas, ULONG_MAX);
1273 XA_BUG_ON(xa, xas_next(&xas) != NULL);
1274 XA_BUG_ON(xa, xas.xa_index != ULONG_MAX);
1275 XA_BUG_ON(xa, xas_next(&xas) != xa_mk_value(0));
1276 XA_BUG_ON(xa, xas.xa_index != 0);
1277 XA_BUG_ON(xa, xas_prev(&xas) != NULL);
1278 XA_BUG_ON(xa, xas.xa_index != ULONG_MAX);
1281 xa_erase_index(xa, 0);
1282 xa_erase_index(xa, idx);
1283 XA_BUG_ON(xa, !xa_empty(xa));
1286 static noinline void check_move(struct xarray *xa)
1288 XA_STATE(xas, xa, (1 << 16) - 1);
1291 for (i = 0; i < (1 << 16); i++)
1292 XA_BUG_ON(xa, xa_store_index(xa, i, GFP_KERNEL) != NULL);
1296 void *entry = xas_prev(&xas);
1298 XA_BUG_ON(xa, entry != xa_mk_index(i));
1299 XA_BUG_ON(xa, i != xas.xa_index);
1302 XA_BUG_ON(xa, xas_prev(&xas) != NULL);
1303 XA_BUG_ON(xa, xas.xa_index != ULONG_MAX);
1306 void *entry = xas_next(&xas);
1307 XA_BUG_ON(xa, entry != xa_mk_index(i));
1308 XA_BUG_ON(xa, i != xas.xa_index);
1310 } while (i < (1 << 16));
1313 for (i = (1 << 8); i < (1 << 15); i++)
1314 xa_erase_index(xa, i);
1320 void *entry = xas_prev(&xas);
1322 if ((i < (1 << 8)) || (i >= (1 << 15)))
1323 XA_BUG_ON(xa, entry != xa_mk_index(i));
1325 XA_BUG_ON(xa, entry != NULL);
1326 XA_BUG_ON(xa, i != xas.xa_index);
1329 XA_BUG_ON(xa, xas_prev(&xas) != NULL);
1330 XA_BUG_ON(xa, xas.xa_index != ULONG_MAX);
1333 void *entry = xas_next(&xas);
1334 if ((i < (1 << 8)) || (i >= (1 << 15)))
1335 XA_BUG_ON(xa, entry != xa_mk_index(i));
1337 XA_BUG_ON(xa, entry != NULL);
1338 XA_BUG_ON(xa, i != xas.xa_index);
1340 } while (i < (1 << 16));
1345 check_move_tiny(xa);
1348 for (i = 0; i < 16; i++)
1349 check_move_small(xa, 1UL << i);
1351 for (i = 2; i < 16; i++)
1352 check_move_small(xa, (1UL << i) - 1);
1355 static noinline void xa_store_many_order(struct xarray *xa,
1356 unsigned long index, unsigned order)
1358 XA_STATE_ORDER(xas, xa, index, order);
1363 XA_BUG_ON(xa, xas_find_conflict(&xas));
1364 xas_create_range(&xas);
1365 if (xas_error(&xas))
1367 for (i = 0; i < (1U << order); i++) {
1368 XA_BUG_ON(xa, xas_store(&xas, xa_mk_index(index + i)));
1373 } while (xas_nomem(&xas, GFP_KERNEL));
1375 XA_BUG_ON(xa, xas_error(&xas));
1378 static noinline void check_create_range_1(struct xarray *xa,
1379 unsigned long index, unsigned order)
1383 xa_store_many_order(xa, index, order);
1384 for (i = index; i < index + (1UL << order); i++)
1385 xa_erase_index(xa, i);
1386 XA_BUG_ON(xa, !xa_empty(xa));
1389 static noinline void check_create_range_2(struct xarray *xa, unsigned order)
1392 unsigned long nr = 1UL << order;
1394 for (i = 0; i < nr * nr; i += nr)
1395 xa_store_many_order(xa, i, order);
1396 for (i = 0; i < nr * nr; i++)
1397 xa_erase_index(xa, i);
1398 XA_BUG_ON(xa, !xa_empty(xa));
1401 static noinline void check_create_range_3(void)
1403 XA_STATE(xas, NULL, 0);
1404 xas_set_err(&xas, -EEXIST);
1405 xas_create_range(&xas);
1406 XA_BUG_ON(NULL, xas_error(&xas) != -EEXIST);
1409 static noinline void check_create_range_4(struct xarray *xa,
1410 unsigned long index, unsigned order)
1412 XA_STATE_ORDER(xas, xa, index, order);
1413 unsigned long base = xas.xa_index;
1414 unsigned long i = 0;
1416 xa_store_index(xa, index, GFP_KERNEL);
1419 xas_create_range(&xas);
1420 if (xas_error(&xas))
1422 for (i = 0; i < (1UL << order); i++) {
1423 void *old = xas_store(&xas, xa_mk_index(base + i));
1424 if (xas.xa_index == index)
1425 XA_BUG_ON(xa, old != xa_mk_index(base + i));
1427 XA_BUG_ON(xa, old != NULL);
1432 } while (xas_nomem(&xas, GFP_KERNEL));
1434 XA_BUG_ON(xa, xas_error(&xas));
1436 for (i = base; i < base + (1UL << order); i++)
1437 xa_erase_index(xa, i);
1438 XA_BUG_ON(xa, !xa_empty(xa));
1441 static noinline void check_create_range(struct xarray *xa)
1444 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 12 : 1;
1446 for (order = 0; order < max_order; order++) {
1447 check_create_range_1(xa, 0, order);
1448 check_create_range_1(xa, 1U << order, order);
1449 check_create_range_1(xa, 2U << order, order);
1450 check_create_range_1(xa, 3U << order, order);
1451 check_create_range_1(xa, 1U << 24, order);
1453 check_create_range_2(xa, order);
1455 check_create_range_4(xa, 0, order);
1456 check_create_range_4(xa, 1U << order, order);
1457 check_create_range_4(xa, 2U << order, order);
1458 check_create_range_4(xa, 3U << order, order);
1459 check_create_range_4(xa, 1U << 24, order);
1461 check_create_range_4(xa, 1, order);
1462 check_create_range_4(xa, (1U << order) + 1, order);
1463 check_create_range_4(xa, (2U << order) + 1, order);
1464 check_create_range_4(xa, (2U << order) - 1, order);
1465 check_create_range_4(xa, (3U << order) + 1, order);
1466 check_create_range_4(xa, (3U << order) - 1, order);
1467 check_create_range_4(xa, (1U << 24) + 1, order);
1470 check_create_range_3();
1473 static noinline void __check_store_range(struct xarray *xa, unsigned long first,
1476 #ifdef CONFIG_XARRAY_MULTI
1477 xa_store_range(xa, first, last, xa_mk_index(first), GFP_KERNEL);
1479 XA_BUG_ON(xa, xa_load(xa, first) != xa_mk_index(first));
1480 XA_BUG_ON(xa, xa_load(xa, last) != xa_mk_index(first));
1481 XA_BUG_ON(xa, xa_load(xa, first - 1) != NULL);
1482 XA_BUG_ON(xa, xa_load(xa, last + 1) != NULL);
1484 xa_store_range(xa, first, last, NULL, GFP_KERNEL);
1487 XA_BUG_ON(xa, !xa_empty(xa));
1490 static noinline void check_store_range(struct xarray *xa)
1494 for (i = 0; i < 128; i++) {
1495 for (j = i; j < 128; j++) {
1496 __check_store_range(xa, i, j);
1497 __check_store_range(xa, 128 + i, 128 + j);
1498 __check_store_range(xa, 4095 + i, 4095 + j);
1499 __check_store_range(xa, 4096 + i, 4096 + j);
1500 __check_store_range(xa, 123456 + i, 123456 + j);
1501 __check_store_range(xa, (1 << 24) + i, (1 << 24) + j);
1506 static void check_align_1(struct xarray *xa, char *name)
1510 unsigned long index;
1513 for (i = 0; i < 8; i++) {
1514 XA_BUG_ON(xa, xa_alloc(xa, &id, name + i, xa_limit_32b,
1516 XA_BUG_ON(xa, id != i);
1518 xa_for_each(xa, index, entry)
1519 XA_BUG_ON(xa, xa_is_err(entry));
1524 * We should always be able to store without allocating memory after
1527 static void check_align_2(struct xarray *xa, char *name)
1531 XA_BUG_ON(xa, !xa_empty(xa));
1533 for (i = 0; i < 8; i++) {
1534 XA_BUG_ON(xa, xa_store(xa, 0, name + i, GFP_KERNEL) != NULL);
1538 for (i = 0; i < 8; i++) {
1539 XA_BUG_ON(xa, xa_reserve(xa, 0, GFP_KERNEL) != 0);
1540 XA_BUG_ON(xa, xa_store(xa, 0, name + i, 0) != NULL);
1544 XA_BUG_ON(xa, !xa_empty(xa));
1547 static noinline void check_align(struct xarray *xa)
1549 char name[] = "Motorola 68000";
1551 check_align_1(xa, name);
1552 check_align_1(xa, name + 1);
1553 check_align_1(xa, name + 2);
1554 check_align_1(xa, name + 3);
1555 check_align_2(xa, name);
1558 static LIST_HEAD(shadow_nodes);
1560 static void test_update_node(struct xa_node *node)
1562 if (node->count && node->count == node->nr_values) {
1563 if (list_empty(&node->private_list))
1564 list_add(&shadow_nodes, &node->private_list);
1566 if (!list_empty(&node->private_list))
1567 list_del_init(&node->private_list);
1571 static noinline void shadow_remove(struct xarray *xa)
1573 struct xa_node *node;
1576 while ((node = list_first_entry_or_null(&shadow_nodes,
1577 struct xa_node, private_list))) {
1578 XA_STATE(xas, node->array, 0);
1579 XA_BUG_ON(xa, node->array != xa);
1580 list_del_init(&node->private_list);
1581 xas.xa_node = xa_parent_locked(node->array, node);
1582 xas.xa_offset = node->offset;
1583 xas.xa_shift = node->shift + XA_CHUNK_SHIFT;
1584 xas_set_update(&xas, test_update_node);
1585 xas_store(&xas, NULL);
1590 static noinline void check_workingset(struct xarray *xa, unsigned long index)
1592 XA_STATE(xas, xa, index);
1593 xas_set_update(&xas, test_update_node);
1597 xas_store(&xas, xa_mk_value(0));
1599 xas_store(&xas, xa_mk_value(1));
1601 } while (xas_nomem(&xas, GFP_KERNEL));
1603 XA_BUG_ON(xa, list_empty(&shadow_nodes));
1607 xas_store(&xas, &xas);
1608 XA_BUG_ON(xa, !list_empty(&shadow_nodes));
1610 xas_store(&xas, xa_mk_value(2));
1612 XA_BUG_ON(xa, list_empty(&shadow_nodes));
1615 XA_BUG_ON(xa, !list_empty(&shadow_nodes));
1616 XA_BUG_ON(xa, !xa_empty(xa));
1620 * Check that the pointer / value / sibling entries are accounted the
1621 * way we expect them to be.
1623 static noinline void check_account(struct xarray *xa)
1625 #ifdef CONFIG_XARRAY_MULTI
1628 for (order = 1; order < 12; order++) {
1629 XA_STATE(xas, xa, 1 << order);
1631 xa_store_order(xa, 0, order, xa, GFP_KERNEL);
1634 XA_BUG_ON(xa, xas.xa_node->count == 0);
1635 XA_BUG_ON(xa, xas.xa_node->count > (1 << order));
1636 XA_BUG_ON(xa, xas.xa_node->nr_values != 0);
1639 xa_store_order(xa, 1 << order, order, xa_mk_index(1UL << order),
1641 XA_BUG_ON(xa, xas.xa_node->count != xas.xa_node->nr_values * 2);
1643 xa_erase(xa, 1 << order);
1644 XA_BUG_ON(xa, xas.xa_node->nr_values != 0);
1647 XA_BUG_ON(xa, !xa_empty(xa));
1652 static noinline void check_destroy(struct xarray *xa)
1654 unsigned long index;
1656 XA_BUG_ON(xa, !xa_empty(xa));
1658 /* Destroying an empty array is a no-op */
1660 XA_BUG_ON(xa, !xa_empty(xa));
1662 /* Destroying an array with a single entry */
1663 for (index = 0; index < 1000; index++) {
1664 xa_store_index(xa, index, GFP_KERNEL);
1665 XA_BUG_ON(xa, xa_empty(xa));
1667 XA_BUG_ON(xa, !xa_empty(xa));
1670 /* Destroying an array with a single entry at ULONG_MAX */
1671 xa_store(xa, ULONG_MAX, xa, GFP_KERNEL);
1672 XA_BUG_ON(xa, xa_empty(xa));
1674 XA_BUG_ON(xa, !xa_empty(xa));
1676 #ifdef CONFIG_XARRAY_MULTI
1677 /* Destroying an array with a multi-index entry */
1678 xa_store_order(xa, 1 << 11, 11, xa, GFP_KERNEL);
1679 XA_BUG_ON(xa, xa_empty(xa));
1681 XA_BUG_ON(xa, !xa_empty(xa));
1685 static DEFINE_XARRAY(array);
1687 static int xarray_checks(void)
1689 check_xa_err(&array);
1690 check_xas_retry(&array);
1691 check_xa_load(&array);
1692 check_xa_mark(&array);
1693 check_xa_shrink(&array);
1694 check_xas_erase(&array);
1695 check_insert(&array);
1696 check_cmpxchg(&array);
1697 check_reserve(&array);
1698 check_reserve(&xa0);
1699 check_multi_store(&array);
1702 check_find_entry(&array);
1703 check_pause(&array);
1704 check_account(&array);
1705 check_destroy(&array);
1707 check_create_range(&array);
1708 check_store_range(&array);
1709 check_store_iter(&array);
1712 check_workingset(&array, 0);
1713 check_workingset(&array, 64);
1714 check_workingset(&array, 4096);
1716 printk("XArray: %u of %u tests passed\n", tests_passed, tests_run);
1717 return (tests_run == tests_passed) ? 0 : -EINVAL;
1720 static void xarray_exit(void)
1724 module_init(xarray_checks);
1725 module_exit(xarray_exit);
1726 MODULE_AUTHOR("Matthew Wilcox <willy@infradead.org>");
1727 MODULE_LICENSE("GPL");