projects/linux·blob v4.20-rc3 · refs

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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * test_xarray.c: Test the XArray API
4 * Copyright (c) 2017-2018 Microsoft Corporation
5 * Author: Matthew Wilcox <[email protected]>
6 */
7
8#include <linux/xarray.h>
9#include <linux/module.h>
10
11static unsigned int tests_run;
12static unsigned int tests_passed;
13
14#ifndef XA_DEBUG
15# ifdef __KERNEL__
16void xa_dump(const struct xarray *xa) { }
17# endif
18#undef XA_BUG_ON
19#define XA_BUG_ON(xa, x) do { \
20 tests_run++; \
21 if (x) { \
22 printk("BUG at %s:%d\n", __func__, __LINE__); \
23 xa_dump(xa); \
24 dump_stack(); \
25 } else { \
26 tests_passed++; \
27 } \
28} while (0)
29#endif
30
31static void *xa_store_index(struct xarray *xa, unsigned long index, gfp_t gfp)
32{
33 return xa_store(xa, index, xa_mk_value(index & LONG_MAX), gfp);
34}
35
36static void xa_alloc_index(struct xarray *xa, unsigned long index, gfp_t gfp)
37{
38 u32 id = 0;
39
40 XA_BUG_ON(xa, xa_alloc(xa, &id, UINT_MAX, xa_mk_value(index & LONG_MAX),
41 gfp) != 0);
42 XA_BUG_ON(xa, id != index);
43}
44
45static void xa_erase_index(struct xarray *xa, unsigned long index)
46{
47 XA_BUG_ON(xa, xa_erase(xa, index) != xa_mk_value(index & LONG_MAX));
48 XA_BUG_ON(xa, xa_load(xa, index) != NULL);
49}
50
51/*
52 * If anyone needs this, please move it to xarray.c. We have no current
53 * users outside the test suite because all current multislot users want
54 * to use the advanced API.
55 */
56static void *xa_store_order(struct xarray *xa, unsigned long index,
57 unsigned order, void *entry, gfp_t gfp)
58{
59 XA_STATE_ORDER(xas, xa, index, order);
60 void *curr;
61
62 do {
63 xas_lock(&xas);
64 curr = xas_store(&xas, entry);
65 xas_unlock(&xas);
66 } while (xas_nomem(&xas, gfp));
67
68 return curr;
69}
70
71static noinline void check_xa_err(struct xarray *xa)
72{
73 XA_BUG_ON(xa, xa_err(xa_store_index(xa, 0, GFP_NOWAIT)) != 0);
74 XA_BUG_ON(xa, xa_err(xa_erase(xa, 0)) != 0);
75#ifndef __KERNEL__
76 /* The kernel does not fail GFP_NOWAIT allocations */
77 XA_BUG_ON(xa, xa_err(xa_store_index(xa, 1, GFP_NOWAIT)) != -ENOMEM);
78 XA_BUG_ON(xa, xa_err(xa_store_index(xa, 1, GFP_NOWAIT)) != -ENOMEM);
79#endif
80 XA_BUG_ON(xa, xa_err(xa_store_index(xa, 1, GFP_KERNEL)) != 0);
81 XA_BUG_ON(xa, xa_err(xa_store(xa, 1, xa_mk_value(0), GFP_KERNEL)) != 0);
82 XA_BUG_ON(xa, xa_err(xa_erase(xa, 1)) != 0);
83// kills the test-suite :-(
84// XA_BUG_ON(xa, xa_err(xa_store(xa, 0, xa_mk_internal(0), 0)) != -EINVAL);
85}
86
87static noinline void check_xas_retry(struct xarray *xa)
88{
89 XA_STATE(xas, xa, 0);
90 void *entry;
91
92 xa_store_index(xa, 0, GFP_KERNEL);
93 xa_store_index(xa, 1, GFP_KERNEL);
94
95 rcu_read_lock();
96 XA_BUG_ON(xa, xas_find(&xas, ULONG_MAX) != xa_mk_value(0));
97 xa_erase_index(xa, 1);
98 XA_BUG_ON(xa, !xa_is_retry(xas_reload(&xas)));
99 XA_BUG_ON(xa, xas_retry(&xas, NULL));
100 XA_BUG_ON(xa, xas_retry(&xas, xa_mk_value(0)));
101 xas_reset(&xas);
102 XA_BUG_ON(xa, xas.xa_node != XAS_RESTART);
103 XA_BUG_ON(xa, xas_next_entry(&xas, ULONG_MAX) != xa_mk_value(0));
104 XA_BUG_ON(xa, xas.xa_node != NULL);
105
106 XA_BUG_ON(xa, xa_store_index(xa, 1, GFP_KERNEL) != NULL);
107 XA_BUG_ON(xa, !xa_is_internal(xas_reload(&xas)));
108 xas.xa_node = XAS_RESTART;
109 XA_BUG_ON(xa, xas_next_entry(&xas, ULONG_MAX) != xa_mk_value(0));
110 rcu_read_unlock();
111
112 /* Make sure we can iterate through retry entries */
113 xas_lock(&xas);
114 xas_set(&xas, 0);
115 xas_store(&xas, XA_RETRY_ENTRY);
116 xas_set(&xas, 1);
117 xas_store(&xas, XA_RETRY_ENTRY);
118
119 xas_set(&xas, 0);
120 xas_for_each(&xas, entry, ULONG_MAX) {
121 xas_store(&xas, xa_mk_value(xas.xa_index));
122 }
123 xas_unlock(&xas);
124
125 xa_erase_index(xa, 0);
126 xa_erase_index(xa, 1);
127}
128
129static noinline void check_xa_load(struct xarray *xa)
130{
131 unsigned long i, j;
132
133 for (i = 0; i < 1024; i++) {
134 for (j = 0; j < 1024; j++) {
135 void *entry = xa_load(xa, j);
136 if (j < i)
137 XA_BUG_ON(xa, xa_to_value(entry) != j);
138 else
139 XA_BUG_ON(xa, entry);
140 }
141 XA_BUG_ON(xa, xa_store_index(xa, i, GFP_KERNEL) != NULL);
142 }
143
144 for (i = 0; i < 1024; i++) {
145 for (j = 0; j < 1024; j++) {
146 void *entry = xa_load(xa, j);
147 if (j >= i)
148 XA_BUG_ON(xa, xa_to_value(entry) != j);
149 else
150 XA_BUG_ON(xa, entry);
151 }
152 xa_erase_index(xa, i);
153 }
154 XA_BUG_ON(xa, !xa_empty(xa));
155}
156
157static noinline void check_xa_mark_1(struct xarray *xa, unsigned long index)
158{
159 unsigned int order;
160 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 8 : 1;
161
162 /* NULL elements have no marks set */
163 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
164 xa_set_mark(xa, index, XA_MARK_0);
165 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
166
167 /* Storing a pointer will not make a mark appear */
168 XA_BUG_ON(xa, xa_store_index(xa, index, GFP_KERNEL) != NULL);
169 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
170 xa_set_mark(xa, index, XA_MARK_0);
171 XA_BUG_ON(xa, !xa_get_mark(xa, index, XA_MARK_0));
172
173 /* Setting one mark will not set another mark */
174 XA_BUG_ON(xa, xa_get_mark(xa, index + 1, XA_MARK_0));
175 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_1));
176
177 /* Storing NULL clears marks, and they can't be set again */
178 xa_erase_index(xa, index);
179 XA_BUG_ON(xa, !xa_empty(xa));
180 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
181 xa_set_mark(xa, index, XA_MARK_0);
182 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
183
184 /*
185 * Storing a multi-index entry over entries with marks gives the
186 * entire entry the union of the marks
187 */
188 BUG_ON((index % 4) != 0);
189 for (order = 2; order < max_order; order++) {
190 unsigned long base = round_down(index, 1UL << order);
191 unsigned long next = base + (1UL << order);
192 unsigned long i;
193
194 XA_BUG_ON(xa, xa_store_index(xa, index + 1, GFP_KERNEL));
195 xa_set_mark(xa, index + 1, XA_MARK_0);
196 XA_BUG_ON(xa, xa_store_index(xa, index + 2, GFP_KERNEL));
197 xa_set_mark(xa, index + 2, XA_MARK_1);
198 XA_BUG_ON(xa, xa_store_index(xa, next, GFP_KERNEL));
199 xa_store_order(xa, index, order, xa_mk_value(index),
200 GFP_KERNEL);
201 for (i = base; i < next; i++) {
202 XA_STATE(xas, xa, i);
203 unsigned int seen = 0;
204 void *entry;
205
206 XA_BUG_ON(xa, !xa_get_mark(xa, i, XA_MARK_0));
207 XA_BUG_ON(xa, !xa_get_mark(xa, i, XA_MARK_1));
208 XA_BUG_ON(xa, xa_get_mark(xa, i, XA_MARK_2));
209
210 /* We should see two elements in the array */
211 xas_for_each(&xas, entry, ULONG_MAX)
212 seen++;
213 XA_BUG_ON(xa, seen != 2);
214
215 /* One of which is marked */
216 xas_set(&xas, 0);
217 seen = 0;
218 xas_for_each_marked(&xas, entry, ULONG_MAX, XA_MARK_0)
219 seen++;
220 XA_BUG_ON(xa, seen != 1);
221 }
222 XA_BUG_ON(xa, xa_get_mark(xa, next, XA_MARK_0));
223 XA_BUG_ON(xa, xa_get_mark(xa, next, XA_MARK_1));
224 XA_BUG_ON(xa, xa_get_mark(xa, next, XA_MARK_2));
225 xa_erase_index(xa, index);
226 xa_erase_index(xa, next);
227 XA_BUG_ON(xa, !xa_empty(xa));
228 }
229 XA_BUG_ON(xa, !xa_empty(xa));
230}
231
232static noinline void check_xa_mark_2(struct xarray *xa)
233{
234 XA_STATE(xas, xa, 0);
235 unsigned long index;
236 unsigned int count = 0;
237 void *entry;
238
239 xa_store_index(xa, 0, GFP_KERNEL);
240 xa_set_mark(xa, 0, XA_MARK_0);
241 xas_lock(&xas);
242 xas_load(&xas);
243 xas_init_marks(&xas);
244 xas_unlock(&xas);
245 XA_BUG_ON(xa, !xa_get_mark(xa, 0, XA_MARK_0) == 0);
246
247 for (index = 3500; index < 4500; index++) {
248 xa_store_index(xa, index, GFP_KERNEL);
249 xa_set_mark(xa, index, XA_MARK_0);
250 }
251
252 xas_reset(&xas);
253 rcu_read_lock();
254 xas_for_each_marked(&xas, entry, ULONG_MAX, XA_MARK_0)
255 count++;
256 rcu_read_unlock();
257 XA_BUG_ON(xa, count != 1000);
258
259 xas_lock(&xas);
260 xas_for_each(&xas, entry, ULONG_MAX) {
261 xas_init_marks(&xas);
262 XA_BUG_ON(xa, !xa_get_mark(xa, xas.xa_index, XA_MARK_0));
263 XA_BUG_ON(xa, !xas_get_mark(&xas, XA_MARK_0));
264 }
265 xas_unlock(&xas);
266
267 xa_destroy(xa);
268}
269
270static noinline void check_xa_mark(struct xarray *xa)
271{
272 unsigned long index;
273
274 for (index = 0; index < 16384; index += 4)
275 check_xa_mark_1(xa, index);
276
277 check_xa_mark_2(xa);
278}
279
280static noinline void check_xa_shrink(struct xarray *xa)
281{
282 XA_STATE(xas, xa, 1);
283 struct xa_node *node;
284 unsigned int order;
285 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 15 : 1;
286
287 XA_BUG_ON(xa, !xa_empty(xa));
288 XA_BUG_ON(xa, xa_store_index(xa, 0, GFP_KERNEL) != NULL);
289 XA_BUG_ON(xa, xa_store_index(xa, 1, GFP_KERNEL) != NULL);
290
291 /*
292 * Check that erasing the entry at 1 shrinks the tree and properly
293 * marks the node as being deleted.
294 */
295 xas_lock(&xas);
296 XA_BUG_ON(xa, xas_load(&xas) != xa_mk_value(1));
297 node = xas.xa_node;
298 XA_BUG_ON(xa, xa_entry_locked(xa, node, 0) != xa_mk_value(0));
299 XA_BUG_ON(xa, xas_store(&xas, NULL) != xa_mk_value(1));
300 XA_BUG_ON(xa, xa_load(xa, 1) != NULL);
301 XA_BUG_ON(xa, xas.xa_node != XAS_BOUNDS);
302 XA_BUG_ON(xa, xa_entry_locked(xa, node, 0) != XA_RETRY_ENTRY);
303 XA_BUG_ON(xa, xas_load(&xas) != NULL);
304 xas_unlock(&xas);
305 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(0));
306 xa_erase_index(xa, 0);
307 XA_BUG_ON(xa, !xa_empty(xa));
308
309 for (order = 0; order < max_order; order++) {
310 unsigned long max = (1UL << order) - 1;
311 xa_store_order(xa, 0, order, xa_mk_value(0), GFP_KERNEL);
312 XA_BUG_ON(xa, xa_load(xa, max) != xa_mk_value(0));
313 XA_BUG_ON(xa, xa_load(xa, max + 1) != NULL);
314 rcu_read_lock();
315 node = xa_head(xa);
316 rcu_read_unlock();
317 XA_BUG_ON(xa, xa_store_index(xa, ULONG_MAX, GFP_KERNEL) !=
318 NULL);
319 rcu_read_lock();
320 XA_BUG_ON(xa, xa_head(xa) == node);
321 rcu_read_unlock();
322 XA_BUG_ON(xa, xa_load(xa, max + 1) != NULL);
323 xa_erase_index(xa, ULONG_MAX);
324 XA_BUG_ON(xa, xa->xa_head != node);
325 xa_erase_index(xa, 0);
326 }
327}
328
329static noinline void check_cmpxchg(struct xarray *xa)
330{
331 void *FIVE = xa_mk_value(5);
332 void *SIX = xa_mk_value(6);
333 void *LOTS = xa_mk_value(12345678);
334
335 XA_BUG_ON(xa, !xa_empty(xa));
336 XA_BUG_ON(xa, xa_store_index(xa, 12345678, GFP_KERNEL) != NULL);
337 XA_BUG_ON(xa, xa_insert(xa, 12345678, xa, GFP_KERNEL) != -EEXIST);
338 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, SIX, FIVE, GFP_KERNEL) != LOTS);
339 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, LOTS, FIVE, GFP_KERNEL) != LOTS);
340 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, FIVE, LOTS, GFP_KERNEL) != FIVE);
341 XA_BUG_ON(xa, xa_cmpxchg(xa, 5, FIVE, NULL, GFP_KERNEL) != NULL);
342 XA_BUG_ON(xa, xa_cmpxchg(xa, 5, NULL, FIVE, GFP_KERNEL) != NULL);
343 xa_erase_index(xa, 12345678);
344 xa_erase_index(xa, 5);
345 XA_BUG_ON(xa, !xa_empty(xa));
346}
347
348static noinline void check_reserve(struct xarray *xa)
349{
350 void *entry;
351 unsigned long index = 0;
352
353 /* An array with a reserved entry is not empty */
354 XA_BUG_ON(xa, !xa_empty(xa));
355 xa_reserve(xa, 12345678, GFP_KERNEL);
356 XA_BUG_ON(xa, xa_empty(xa));
357 XA_BUG_ON(xa, xa_load(xa, 12345678));
358 xa_release(xa, 12345678);
359 XA_BUG_ON(xa, !xa_empty(xa));
360
361 /* Releasing a used entry does nothing */
362 xa_reserve(xa, 12345678, GFP_KERNEL);
363 XA_BUG_ON(xa, xa_store_index(xa, 12345678, GFP_NOWAIT) != NULL);
364 xa_release(xa, 12345678);
365 xa_erase_index(xa, 12345678);
366 XA_BUG_ON(xa, !xa_empty(xa));
367
368 /* cmpxchg sees a reserved entry as NULL */
369 xa_reserve(xa, 12345678, GFP_KERNEL);
370 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, NULL, xa_mk_value(12345678),
371 GFP_NOWAIT) != NULL);
372 xa_release(xa, 12345678);
373 xa_erase_index(xa, 12345678);
374 XA_BUG_ON(xa, !xa_empty(xa));
375
376 /* Can iterate through a reserved entry */
377 xa_store_index(xa, 5, GFP_KERNEL);
378 xa_reserve(xa, 6, GFP_KERNEL);
379 xa_store_index(xa, 7, GFP_KERNEL);
380
381 xa_for_each(xa, entry, index, ULONG_MAX, XA_PRESENT) {
382 XA_BUG_ON(xa, index != 5 && index != 7);
383 }
384 xa_destroy(xa);
385}
386
387static noinline void check_xas_erase(struct xarray *xa)
388{
389 XA_STATE(xas, xa, 0);
390 void *entry;
391 unsigned long i, j;
392
393 for (i = 0; i < 200; i++) {
394 for (j = i; j < 2 * i + 17; j++) {
395 xas_set(&xas, j);
396 do {
397 xas_lock(&xas);
398 xas_store(&xas, xa_mk_value(j));
399 xas_unlock(&xas);
400 } while (xas_nomem(&xas, GFP_KERNEL));
401 }
402
403 xas_set(&xas, ULONG_MAX);
404 do {
405 xas_lock(&xas);
406 xas_store(&xas, xa_mk_value(0));
407 xas_unlock(&xas);
408 } while (xas_nomem(&xas, GFP_KERNEL));
409
410 xas_lock(&xas);
411 xas_store(&xas, NULL);
412
413 xas_set(&xas, 0);
414 j = i;
415 xas_for_each(&xas, entry, ULONG_MAX) {
416 XA_BUG_ON(xa, entry != xa_mk_value(j));
417 xas_store(&xas, NULL);
418 j++;
419 }
420 xas_unlock(&xas);
421 XA_BUG_ON(xa, !xa_empty(xa));
422 }
423}
424
425#ifdef CONFIG_XARRAY_MULTI
426static noinline void check_multi_store_1(struct xarray *xa, unsigned long index,
427 unsigned int order)
428{
429 XA_STATE(xas, xa, index);
430 unsigned long min = index & ~((1UL << order) - 1);
431 unsigned long max = min + (1UL << order);
432
433 xa_store_order(xa, index, order, xa_mk_value(index), GFP_KERNEL);
434 XA_BUG_ON(xa, xa_load(xa, min) != xa_mk_value(index));
435 XA_BUG_ON(xa, xa_load(xa, max - 1) != xa_mk_value(index));
436 XA_BUG_ON(xa, xa_load(xa, max) != NULL);
437 XA_BUG_ON(xa, xa_load(xa, min - 1) != NULL);
438
439 XA_BUG_ON(xa, xas_store(&xas, xa_mk_value(min)) != xa_mk_value(index));
440 XA_BUG_ON(xa, xa_load(xa, min) != xa_mk_value(min));
441 XA_BUG_ON(xa, xa_load(xa, max - 1) != xa_mk_value(min));
442 XA_BUG_ON(xa, xa_load(xa, max) != NULL);
443 XA_BUG_ON(xa, xa_load(xa, min - 1) != NULL);
444
445 xa_erase_index(xa, min);
446 XA_BUG_ON(xa, !xa_empty(xa));
447}
448
449static noinline void check_multi_store_2(struct xarray *xa, unsigned long index,
450 unsigned int order)
451{
452 XA_STATE(xas, xa, index);
453 xa_store_order(xa, index, order, xa_mk_value(0), GFP_KERNEL);
454
455 XA_BUG_ON(xa, xas_store(&xas, xa_mk_value(1)) != xa_mk_value(0));
456 XA_BUG_ON(xa, xas.xa_index != index);
457 XA_BUG_ON(xa, xas_store(&xas, NULL) != xa_mk_value(1));
458 XA_BUG_ON(xa, !xa_empty(xa));
459}
460#endif
461
462static noinline void check_multi_store(struct xarray *xa)
463{
464#ifdef CONFIG_XARRAY_MULTI
465 unsigned long i, j, k;
466 unsigned int max_order = (sizeof(long) == 4) ? 30 : 60;
467
468 /* Loading from any position returns the same value */
469 xa_store_order(xa, 0, 1, xa_mk_value(0), GFP_KERNEL);
470 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(0));
471 XA_BUG_ON(xa, xa_load(xa, 1) != xa_mk_value(0));
472 XA_BUG_ON(xa, xa_load(xa, 2) != NULL);
473 rcu_read_lock();
474 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->count != 2);
475 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->nr_values != 2);
476 rcu_read_unlock();
477
478 /* Storing adjacent to the value does not alter the value */
479 xa_store(xa, 3, xa, GFP_KERNEL);
480 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(0));
481 XA_BUG_ON(xa, xa_load(xa, 1) != xa_mk_value(0));
482 XA_BUG_ON(xa, xa_load(xa, 2) != NULL);
483 rcu_read_lock();
484 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->count != 3);
485 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->nr_values != 2);
486 rcu_read_unlock();
487
488 /* Overwriting multiple indexes works */
489 xa_store_order(xa, 0, 2, xa_mk_value(1), GFP_KERNEL);
490 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(1));
491 XA_BUG_ON(xa, xa_load(xa, 1) != xa_mk_value(1));
492 XA_BUG_ON(xa, xa_load(xa, 2) != xa_mk_value(1));
493 XA_BUG_ON(xa, xa_load(xa, 3) != xa_mk_value(1));
494 XA_BUG_ON(xa, xa_load(xa, 4) != NULL);
495 rcu_read_lock();
496 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->count != 4);
497 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->nr_values != 4);
498 rcu_read_unlock();
499
500 /* We can erase multiple values with a single store */
501 xa_store_order(xa, 0, 63, NULL, GFP_KERNEL);
502 XA_BUG_ON(xa, !xa_empty(xa));
503
504 /* Even when the first slot is empty but the others aren't */
505 xa_store_index(xa, 1, GFP_KERNEL);
506 xa_store_index(xa, 2, GFP_KERNEL);
507 xa_store_order(xa, 0, 2, NULL, GFP_KERNEL);
508 XA_BUG_ON(xa, !xa_empty(xa));
509
510 for (i = 0; i < max_order; i++) {
511 for (j = 0; j < max_order; j++) {
512 xa_store_order(xa, 0, i, xa_mk_value(i), GFP_KERNEL);
513 xa_store_order(xa, 0, j, xa_mk_value(j), GFP_KERNEL);
514
515 for (k = 0; k < max_order; k++) {
516 void *entry = xa_load(xa, (1UL << k) - 1);
517 if ((i < k) && (j < k))
518 XA_BUG_ON(xa, entry != NULL);
519 else
520 XA_BUG_ON(xa, entry != xa_mk_value(j));
521 }
522
523 xa_erase(xa, 0);
524 XA_BUG_ON(xa, !xa_empty(xa));
525 }
526 }
527
528 for (i = 0; i < 20; i++) {
529 check_multi_store_1(xa, 200, i);
530 check_multi_store_1(xa, 0, i);
531 check_multi_store_1(xa, (1UL << i) + 1, i);
532 }
533 check_multi_store_2(xa, 4095, 9);
534#endif
535}
536
537static DEFINE_XARRAY_ALLOC(xa0);
538
539static noinline void check_xa_alloc(void)
540{
541 int i;
542 u32 id;
543
544 /* An empty array should assign 0 to the first alloc */
545 xa_alloc_index(&xa0, 0, GFP_KERNEL);
546
547 /* Erasing it should make the array empty again */
548 xa_erase_index(&xa0, 0);
549 XA_BUG_ON(&xa0, !xa_empty(&xa0));
550
551 /* And it should assign 0 again */
552 xa_alloc_index(&xa0, 0, GFP_KERNEL);
553
554 /* The next assigned ID should be 1 */
555 xa_alloc_index(&xa0, 1, GFP_KERNEL);
556 xa_erase_index(&xa0, 1);
557
558 /* Storing a value should mark it used */
559 xa_store_index(&xa0, 1, GFP_KERNEL);
560 xa_alloc_index(&xa0, 2, GFP_KERNEL);
561
562 /* If we then erase 0, it should be free */
563 xa_erase_index(&xa0, 0);
564 xa_alloc_index(&xa0, 0, GFP_KERNEL);
565
566 xa_erase_index(&xa0, 1);
567 xa_erase_index(&xa0, 2);
568
569 for (i = 1; i < 5000; i++) {
570 xa_alloc_index(&xa0, i, GFP_KERNEL);
571 }
572
573 xa_destroy(&xa0);
574
575 id = 0xfffffffeU;
576 XA_BUG_ON(&xa0, xa_alloc(&xa0, &id, UINT_MAX, xa_mk_value(0),
577 GFP_KERNEL) != 0);
578 XA_BUG_ON(&xa0, id != 0xfffffffeU);
579 XA_BUG_ON(&xa0, xa_alloc(&xa0, &id, UINT_MAX, xa_mk_value(0),
580 GFP_KERNEL) != 0);
581 XA_BUG_ON(&xa0, id != 0xffffffffU);
582 XA_BUG_ON(&xa0, xa_alloc(&xa0, &id, UINT_MAX, xa_mk_value(0),
583 GFP_KERNEL) != -ENOSPC);
584 XA_BUG_ON(&xa0, id != 0xffffffffU);
585 xa_destroy(&xa0);
586}
587
588static noinline void __check_store_iter(struct xarray *xa, unsigned long start,
589 unsigned int order, unsigned int present)
590{
591 XA_STATE_ORDER(xas, xa, start, order);
592 void *entry;
593 unsigned int count = 0;
594
595retry:
596 xas_lock(&xas);
597 xas_for_each_conflict(&xas, entry) {
598 XA_BUG_ON(xa, !xa_is_value(entry));
599 XA_BUG_ON(xa, entry < xa_mk_value(start));
600 XA_BUG_ON(xa, entry > xa_mk_value(start + (1UL << order) - 1));
601 count++;
602 }
603 xas_store(&xas, xa_mk_value(start));
604 xas_unlock(&xas);
605 if (xas_nomem(&xas, GFP_KERNEL)) {
606 count = 0;
607 goto retry;
608 }
609 XA_BUG_ON(xa, xas_error(&xas));
610 XA_BUG_ON(xa, count != present);
611 XA_BUG_ON(xa, xa_load(xa, start) != xa_mk_value(start));
612 XA_BUG_ON(xa, xa_load(xa, start + (1UL << order) - 1) !=
613 xa_mk_value(start));
614 xa_erase_index(xa, start);
615}
616
617static noinline void check_store_iter(struct xarray *xa)
618{
619 unsigned int i, j;
620 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 20 : 1;
621
622 for (i = 0; i < max_order; i++) {
623 unsigned int min = 1 << i;
624 unsigned int max = (2 << i) - 1;
625 __check_store_iter(xa, 0, i, 0);
626 XA_BUG_ON(xa, !xa_empty(xa));
627 __check_store_iter(xa, min, i, 0);
628 XA_BUG_ON(xa, !xa_empty(xa));
629
630 xa_store_index(xa, min, GFP_KERNEL);
631 __check_store_iter(xa, min, i, 1);
632 XA_BUG_ON(xa, !xa_empty(xa));
633 xa_store_index(xa, max, GFP_KERNEL);
634 __check_store_iter(xa, min, i, 1);
635 XA_BUG_ON(xa, !xa_empty(xa));
636
637 for (j = 0; j < min; j++)
638 xa_store_index(xa, j, GFP_KERNEL);
639 __check_store_iter(xa, 0, i, min);
640 XA_BUG_ON(xa, !xa_empty(xa));
641 for (j = 0; j < min; j++)
642 xa_store_index(xa, min + j, GFP_KERNEL);
643 __check_store_iter(xa, min, i, min);
644 XA_BUG_ON(xa, !xa_empty(xa));
645 }
646#ifdef CONFIG_XARRAY_MULTI
647 xa_store_index(xa, 63, GFP_KERNEL);
648 xa_store_index(xa, 65, GFP_KERNEL);
649 __check_store_iter(xa, 64, 2, 1);
650 xa_erase_index(xa, 63);
651#endif
652 XA_BUG_ON(xa, !xa_empty(xa));
653}
654
655static noinline void check_multi_find(struct xarray *xa)
656{
657#ifdef CONFIG_XARRAY_MULTI
658 unsigned long index;
659
660 xa_store_order(xa, 12, 2, xa_mk_value(12), GFP_KERNEL);
661 XA_BUG_ON(xa, xa_store_index(xa, 16, GFP_KERNEL) != NULL);
662
663 index = 0;
664 XA_BUG_ON(xa, xa_find(xa, &index, ULONG_MAX, XA_PRESENT) !=
665 xa_mk_value(12));
666 XA_BUG_ON(xa, index != 12);
667 index = 13;
668 XA_BUG_ON(xa, xa_find(xa, &index, ULONG_MAX, XA_PRESENT) !=
669 xa_mk_value(12));
670 XA_BUG_ON(xa, (index < 12) || (index >= 16));
671 XA_BUG_ON(xa, xa_find_after(xa, &index, ULONG_MAX, XA_PRESENT) !=
672 xa_mk_value(16));
673 XA_BUG_ON(xa, index != 16);
674
675 xa_erase_index(xa, 12);
676 xa_erase_index(xa, 16);
677 XA_BUG_ON(xa, !xa_empty(xa));
678#endif
679}
680
681static noinline void check_multi_find_2(struct xarray *xa)
682{
683 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 10 : 1;
684 unsigned int i, j;
685 void *entry;
686
687 for (i = 0; i < max_order; i++) {
688 unsigned long index = 1UL << i;
689 for (j = 0; j < index; j++) {
690 XA_STATE(xas, xa, j + index);
691 xa_store_index(xa, index - 1, GFP_KERNEL);
692 xa_store_order(xa, index, i, xa_mk_value(index),
693 GFP_KERNEL);
694 rcu_read_lock();
695 xas_for_each(&xas, entry, ULONG_MAX) {
696 xa_erase_index(xa, index);
697 }
698 rcu_read_unlock();
699 xa_erase_index(xa, index - 1);
700 XA_BUG_ON(xa, !xa_empty(xa));
701 }
702 }
703}
704
705static noinline void check_find(struct xarray *xa)
706{
707 unsigned long i, j, k;
708
709 XA_BUG_ON(xa, !xa_empty(xa));
710
711 /*
712 * Check xa_find with all pairs between 0 and 99 inclusive,
713 * starting at every index between 0 and 99
714 */
715 for (i = 0; i < 100; i++) {
716 XA_BUG_ON(xa, xa_store_index(xa, i, GFP_KERNEL) != NULL);
717 xa_set_mark(xa, i, XA_MARK_0);
718 for (j = 0; j < i; j++) {
719 XA_BUG_ON(xa, xa_store_index(xa, j, GFP_KERNEL) !=
720 NULL);
721 xa_set_mark(xa, j, XA_MARK_0);
722 for (k = 0; k < 100; k++) {
723 unsigned long index = k;
724 void *entry = xa_find(xa, &index, ULONG_MAX,
725 XA_PRESENT);
726 if (k <= j)
727 XA_BUG_ON(xa, index != j);
728 else if (k <= i)
729 XA_BUG_ON(xa, index != i);
730 else
731 XA_BUG_ON(xa, entry != NULL);
732
733 index = k;
734 entry = xa_find(xa, &index, ULONG_MAX,
735 XA_MARK_0);
736 if (k <= j)
737 XA_BUG_ON(xa, index != j);
738 else if (k <= i)
739 XA_BUG_ON(xa, index != i);
740 else
741 XA_BUG_ON(xa, entry != NULL);
742 }
743 xa_erase_index(xa, j);
744 XA_BUG_ON(xa, xa_get_mark(xa, j, XA_MARK_0));
745 XA_BUG_ON(xa, !xa_get_mark(xa, i, XA_MARK_0));
746 }
747 xa_erase_index(xa, i);
748 XA_BUG_ON(xa, xa_get_mark(xa, i, XA_MARK_0));
749 }
750 XA_BUG_ON(xa, !xa_empty(xa));
751 check_multi_find(xa);
752 check_multi_find_2(xa);
753}
754
755/* See find_swap_entry() in mm/shmem.c */
756static noinline unsigned long xa_find_entry(struct xarray *xa, void *item)
757{
758 XA_STATE(xas, xa, 0);
759 unsigned int checked = 0;
760 void *entry;
761
762 rcu_read_lock();
763 xas_for_each(&xas, entry, ULONG_MAX) {
764 if (xas_retry(&xas, entry))
765 continue;
766 if (entry == item)
767 break;
768 checked++;
769 if ((checked % 4) != 0)
770 continue;
771 xas_pause(&xas);
772 }
773 rcu_read_unlock();
774
775 return entry ? xas.xa_index : -1;
776}
777
778static noinline void check_find_entry(struct xarray *xa)
779{
780#ifdef CONFIG_XARRAY_MULTI
781 unsigned int order;
782 unsigned long offset, index;
783
784 for (order = 0; order < 20; order++) {
785 for (offset = 0; offset < (1UL << (order + 3));
786 offset += (1UL << order)) {
787 for (index = 0; index < (1UL << (order + 5));
788 index += (1UL << order)) {
789 xa_store_order(xa, index, order,
790 xa_mk_value(index), GFP_KERNEL);
791 XA_BUG_ON(xa, xa_load(xa, index) !=
792 xa_mk_value(index));
793 XA_BUG_ON(xa, xa_find_entry(xa,
794 xa_mk_value(index)) != index);
795 }
796 XA_BUG_ON(xa, xa_find_entry(xa, xa) != -1);
797 xa_destroy(xa);
798 }
799 }
800#endif
801
802 XA_BUG_ON(xa, xa_find_entry(xa, xa) != -1);
803 xa_store_index(xa, ULONG_MAX, GFP_KERNEL);
804 XA_BUG_ON(xa, xa_find_entry(xa, xa) != -1);
805 XA_BUG_ON(xa, xa_find_entry(xa, xa_mk_value(LONG_MAX)) != -1);
806 xa_erase_index(xa, ULONG_MAX);
807 XA_BUG_ON(xa, !xa_empty(xa));
808}
809
810static noinline void check_move_small(struct xarray *xa, unsigned long idx)
811{
812 XA_STATE(xas, xa, 0);
813 unsigned long i;
814
815 xa_store_index(xa, 0, GFP_KERNEL);
816 xa_store_index(xa, idx, GFP_KERNEL);
817
818 rcu_read_lock();
819 for (i = 0; i < idx * 4; i++) {
820 void *entry = xas_next(&xas);
821 if (i <= idx)
822 XA_BUG_ON(xa, xas.xa_node == XAS_RESTART);
823 XA_BUG_ON(xa, xas.xa_index != i);
824 if (i == 0 || i == idx)
825 XA_BUG_ON(xa, entry != xa_mk_value(i));
826 else
827 XA_BUG_ON(xa, entry != NULL);
828 }
829 xas_next(&xas);
830 XA_BUG_ON(xa, xas.xa_index != i);
831
832 do {
833 void *entry = xas_prev(&xas);
834 i--;
835 if (i <= idx)
836 XA_BUG_ON(xa, xas.xa_node == XAS_RESTART);
837 XA_BUG_ON(xa, xas.xa_index != i);
838 if (i == 0 || i == idx)
839 XA_BUG_ON(xa, entry != xa_mk_value(i));
840 else
841 XA_BUG_ON(xa, entry != NULL);
842 } while (i > 0);
843
844 xas_set(&xas, ULONG_MAX);
845 XA_BUG_ON(xa, xas_next(&xas) != NULL);
846 XA_BUG_ON(xa, xas.xa_index != ULONG_MAX);
847 XA_BUG_ON(xa, xas_next(&xas) != xa_mk_value(0));
848 XA_BUG_ON(xa, xas.xa_index != 0);
849 XA_BUG_ON(xa, xas_prev(&xas) != NULL);
850 XA_BUG_ON(xa, xas.xa_index != ULONG_MAX);
851 rcu_read_unlock();
852
853 xa_erase_index(xa, 0);
854 xa_erase_index(xa, idx);
855 XA_BUG_ON(xa, !xa_empty(xa));
856}
857
858static noinline void check_move(struct xarray *xa)
859{
860 XA_STATE(xas, xa, (1 << 16) - 1);
861 unsigned long i;
862
863 for (i = 0; i < (1 << 16); i++)
864 XA_BUG_ON(xa, xa_store_index(xa, i, GFP_KERNEL) != NULL);
865
866 rcu_read_lock();
867 do {
868 void *entry = xas_prev(&xas);
869 i--;
870 XA_BUG_ON(xa, entry != xa_mk_value(i));
871 XA_BUG_ON(xa, i != xas.xa_index);
872 } while (i != 0);
873
874 XA_BUG_ON(xa, xas_prev(&xas) != NULL);
875 XA_BUG_ON(xa, xas.xa_index != ULONG_MAX);
876
877 do {
878 void *entry = xas_next(&xas);
879 XA_BUG_ON(xa, entry != xa_mk_value(i));
880 XA_BUG_ON(xa, i != xas.xa_index);
881 i++;
882 } while (i < (1 << 16));
883 rcu_read_unlock();
884
885 for (i = (1 << 8); i < (1 << 15); i++)
886 xa_erase_index(xa, i);
887
888 i = xas.xa_index;
889
890 rcu_read_lock();
891 do {
892 void *entry = xas_prev(&xas);
893 i--;
894 if ((i < (1 << 8)) || (i >= (1 << 15)))
895 XA_BUG_ON(xa, entry != xa_mk_value(i));
896 else
897 XA_BUG_ON(xa, entry != NULL);
898 XA_BUG_ON(xa, i != xas.xa_index);
899 } while (i != 0);
900
901 XA_BUG_ON(xa, xas_prev(&xas) != NULL);
902 XA_BUG_ON(xa, xas.xa_index != ULONG_MAX);
903
904 do {
905 void *entry = xas_next(&xas);
906 if ((i < (1 << 8)) || (i >= (1 << 15)))
907 XA_BUG_ON(xa, entry != xa_mk_value(i));
908 else
909 XA_BUG_ON(xa, entry != NULL);
910 XA_BUG_ON(xa, i != xas.xa_index);
911 i++;
912 } while (i < (1 << 16));
913 rcu_read_unlock();
914
915 xa_destroy(xa);
916
917 for (i = 0; i < 16; i++)
918 check_move_small(xa, 1UL << i);
919
920 for (i = 2; i < 16; i++)
921 check_move_small(xa, (1UL << i) - 1);
922}
923
924static noinline void xa_store_many_order(struct xarray *xa,
925 unsigned long index, unsigned order)
926{
927 XA_STATE_ORDER(xas, xa, index, order);
928 unsigned int i = 0;
929
930 do {
931 xas_lock(&xas);
932 XA_BUG_ON(xa, xas_find_conflict(&xas));
933 xas_create_range(&xas);
934 if (xas_error(&xas))
935 goto unlock;
936 for (i = 0; i < (1U << order); i++) {
937 XA_BUG_ON(xa, xas_store(&xas, xa_mk_value(index + i)));
938 xas_next(&xas);
939 }
940unlock:
941 xas_unlock(&xas);
942 } while (xas_nomem(&xas, GFP_KERNEL));
943
944 XA_BUG_ON(xa, xas_error(&xas));
945}
946
947static noinline void check_create_range_1(struct xarray *xa,
948 unsigned long index, unsigned order)
949{
950 unsigned long i;
951
952 xa_store_many_order(xa, index, order);
953 for (i = index; i < index + (1UL << order); i++)
954 xa_erase_index(xa, i);
955 XA_BUG_ON(xa, !xa_empty(xa));
956}
957
958static noinline void check_create_range_2(struct xarray *xa, unsigned order)
959{
960 unsigned long i;
961 unsigned long nr = 1UL << order;
962
963 for (i = 0; i < nr * nr; i += nr)
964 xa_store_many_order(xa, i, order);
965 for (i = 0; i < nr * nr; i++)
966 xa_erase_index(xa, i);
967 XA_BUG_ON(xa, !xa_empty(xa));
968}
969
970static noinline void check_create_range_3(void)
971{
972 XA_STATE(xas, NULL, 0);
973 xas_set_err(&xas, -EEXIST);
974 xas_create_range(&xas);
975 XA_BUG_ON(NULL, xas_error(&xas) != -EEXIST);
976}
977
978static noinline void check_create_range_4(struct xarray *xa,
979 unsigned long index, unsigned order)
980{
981 XA_STATE_ORDER(xas, xa, index, order);
982 unsigned long base = xas.xa_index;
983 unsigned long i = 0;
984
985 xa_store_index(xa, index, GFP_KERNEL);
986 do {
987 xas_lock(&xas);
988 xas_create_range(&xas);
989 if (xas_error(&xas))
990 goto unlock;
991 for (i = 0; i < (1UL << order); i++) {
992 void *old = xas_store(&xas, xa_mk_value(base + i));
993 if (xas.xa_index == index)
994 XA_BUG_ON(xa, old != xa_mk_value(base + i));
995 else
996 XA_BUG_ON(xa, old != NULL);
997 xas_next(&xas);
998 }
999unlock:
1000 xas_unlock(&xas);
1001 } while (xas_nomem(&xas, GFP_KERNEL));
1002
1003 XA_BUG_ON(xa, xas_error(&xas));
1004
1005 for (i = base; i < base + (1UL << order); i++)
1006 xa_erase_index(xa, i);
1007 XA_BUG_ON(xa, !xa_empty(xa));
1008}
1009
1010static noinline void check_create_range(struct xarray *xa)
1011{
1012 unsigned int order;
1013 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 12 : 1;
1014
1015 for (order = 0; order < max_order; order++) {
1016 check_create_range_1(xa, 0, order);
1017 check_create_range_1(xa, 1U << order, order);
1018 check_create_range_1(xa, 2U << order, order);
1019 check_create_range_1(xa, 3U << order, order);
1020 check_create_range_1(xa, 1U << 24, order);
1021 if (order < 10)
1022 check_create_range_2(xa, order);
1023
1024 check_create_range_4(xa, 0, order);
1025 check_create_range_4(xa, 1U << order, order);
1026 check_create_range_4(xa, 2U << order, order);
1027 check_create_range_4(xa, 3U << order, order);
1028 check_create_range_4(xa, 1U << 24, order);
1029
1030 check_create_range_4(xa, 1, order);
1031 check_create_range_4(xa, (1U << order) + 1, order);
1032 check_create_range_4(xa, (2U << order) + 1, order);
1033 check_create_range_4(xa, (2U << order) - 1, order);
1034 check_create_range_4(xa, (3U << order) + 1, order);
1035 check_create_range_4(xa, (3U << order) - 1, order);
1036 check_create_range_4(xa, (1U << 24) + 1, order);
1037 }
1038
1039 check_create_range_3();
1040}
1041
1042static noinline void __check_store_range(struct xarray *xa, unsigned long first,
1043 unsigned long last)
1044{
1045#ifdef CONFIG_XARRAY_MULTI
1046 xa_store_range(xa, first, last, xa_mk_value(first), GFP_KERNEL);
1047
1048 XA_BUG_ON(xa, xa_load(xa, first) != xa_mk_value(first));
1049 XA_BUG_ON(xa, xa_load(xa, last) != xa_mk_value(first));
1050 XA_BUG_ON(xa, xa_load(xa, first - 1) != NULL);
1051 XA_BUG_ON(xa, xa_load(xa, last + 1) != NULL);
1052
1053 xa_store_range(xa, first, last, NULL, GFP_KERNEL);
1054#endif
1055
1056 XA_BUG_ON(xa, !xa_empty(xa));
1057}
1058
1059static noinline void check_store_range(struct xarray *xa)
1060{
1061 unsigned long i, j;
1062
1063 for (i = 0; i < 128; i++) {
1064 for (j = i; j < 128; j++) {
1065 __check_store_range(xa, i, j);
1066 __check_store_range(xa, 128 + i, 128 + j);
1067 __check_store_range(xa, 4095 + i, 4095 + j);
1068 __check_store_range(xa, 4096 + i, 4096 + j);
1069 __check_store_range(xa, 123456 + i, 123456 + j);
1070 __check_store_range(xa, UINT_MAX + i, UINT_MAX + j);
1071 }
1072 }
1073}
1074
1075static LIST_HEAD(shadow_nodes);
1076
1077static void test_update_node(struct xa_node *node)
1078{
1079 if (node->count && node->count == node->nr_values) {
1080 if (list_empty(&node->private_list))
1081 list_add(&shadow_nodes, &node->private_list);
1082 } else {
1083 if (!list_empty(&node->private_list))
1084 list_del_init(&node->private_list);
1085 }
1086}
1087
1088static noinline void shadow_remove(struct xarray *xa)
1089{
1090 struct xa_node *node;
1091
1092 xa_lock(xa);
1093 while ((node = list_first_entry_or_null(&shadow_nodes,
1094 struct xa_node, private_list))) {
1095 XA_STATE(xas, node->array, 0);
1096 XA_BUG_ON(xa, node->array != xa);
1097 list_del_init(&node->private_list);
1098 xas.xa_node = xa_parent_locked(node->array, node);
1099 xas.xa_offset = node->offset;
1100 xas.xa_shift = node->shift + XA_CHUNK_SHIFT;
1101 xas_set_update(&xas, test_update_node);
1102 xas_store(&xas, NULL);
1103 }
1104 xa_unlock(xa);
1105}
1106
1107static noinline void check_workingset(struct xarray *xa, unsigned long index)
1108{
1109 XA_STATE(xas, xa, index);
1110 xas_set_update(&xas, test_update_node);
1111
1112 do {
1113 xas_lock(&xas);
1114 xas_store(&xas, xa_mk_value(0));
1115 xas_next(&xas);
1116 xas_store(&xas, xa_mk_value(1));
1117 xas_unlock(&xas);
1118 } while (xas_nomem(&xas, GFP_KERNEL));
1119
1120 XA_BUG_ON(xa, list_empty(&shadow_nodes));
1121
1122 xas_lock(&xas);
1123 xas_next(&xas);
1124 xas_store(&xas, &xas);
1125 XA_BUG_ON(xa, !list_empty(&shadow_nodes));
1126
1127 xas_store(&xas, xa_mk_value(2));
1128 xas_unlock(&xas);
1129 XA_BUG_ON(xa, list_empty(&shadow_nodes));
1130
1131 shadow_remove(xa);
1132 XA_BUG_ON(xa, !list_empty(&shadow_nodes));
1133 XA_BUG_ON(xa, !xa_empty(xa));
1134}
1135
1136/*
1137 * Check that the pointer / value / sibling entries are accounted the
1138 * way we expect them to be.
1139 */
1140static noinline void check_account(struct xarray *xa)
1141{
1142#ifdef CONFIG_XARRAY_MULTI
1143 unsigned int order;
1144
1145 for (order = 1; order < 12; order++) {
1146 XA_STATE(xas, xa, 1 << order);
1147
1148 xa_store_order(xa, 0, order, xa, GFP_KERNEL);
1149 xas_load(&xas);
1150 XA_BUG_ON(xa, xas.xa_node->count == 0);
1151 XA_BUG_ON(xa, xas.xa_node->count > (1 << order));
1152 XA_BUG_ON(xa, xas.xa_node->nr_values != 0);
1153
1154 xa_store_order(xa, 1 << order, order, xa_mk_value(1 << order),
1155 GFP_KERNEL);
1156 XA_BUG_ON(xa, xas.xa_node->count != xas.xa_node->nr_values * 2);
1157
1158 xa_erase(xa, 1 << order);
1159 XA_BUG_ON(xa, xas.xa_node->nr_values != 0);
1160
1161 xa_erase(xa, 0);
1162 XA_BUG_ON(xa, !xa_empty(xa));
1163 }
1164#endif
1165}
1166
1167static noinline void check_destroy(struct xarray *xa)
1168{
1169 unsigned long index;
1170
1171 XA_BUG_ON(xa, !xa_empty(xa));
1172
1173 /* Destroying an empty array is a no-op */
1174 xa_destroy(xa);
1175 XA_BUG_ON(xa, !xa_empty(xa));
1176
1177 /* Destroying an array with a single entry */
1178 for (index = 0; index < 1000; index++) {
1179 xa_store_index(xa, index, GFP_KERNEL);
1180 XA_BUG_ON(xa, xa_empty(xa));
1181 xa_destroy(xa);
1182 XA_BUG_ON(xa, !xa_empty(xa));
1183 }
1184
1185 /* Destroying an array with a single entry at ULONG_MAX */
1186 xa_store(xa, ULONG_MAX, xa, GFP_KERNEL);
1187 XA_BUG_ON(xa, xa_empty(xa));
1188 xa_destroy(xa);
1189 XA_BUG_ON(xa, !xa_empty(xa));
1190
1191#ifdef CONFIG_XARRAY_MULTI
1192 /* Destroying an array with a multi-index entry */
1193 xa_store_order(xa, 1 << 11, 11, xa, GFP_KERNEL);
1194 XA_BUG_ON(xa, xa_empty(xa));
1195 xa_destroy(xa);
1196 XA_BUG_ON(xa, !xa_empty(xa));
1197#endif
1198}
1199
1200static DEFINE_XARRAY(array);
1201
1202static int xarray_checks(void)
1203{
1204 check_xa_err(&array);
1205 check_xas_retry(&array);
1206 check_xa_load(&array);
1207 check_xa_mark(&array);
1208 check_xa_shrink(&array);
1209 check_xas_erase(&array);
1210 check_cmpxchg(&array);
1211 check_reserve(&array);
1212 check_multi_store(&array);
1213 check_xa_alloc();
1214 check_find(&array);
1215 check_find_entry(&array);
1216 check_account(&array);
1217 check_destroy(&array);
1218 check_move(&array);
1219 check_create_range(&array);
1220 check_store_range(&array);
1221 check_store_iter(&array);
1222
1223 check_workingset(&array, 0);
1224 check_workingset(&array, 64);
1225 check_workingset(&array, 4096);
1226
1227 printk("XArray: %u of %u tests passed\n", tests_passed, tests_run);
1228 return (tests_run == tests_passed) ? 0 : -EINVAL;
1229}
1230
1231static void xarray_exit(void)
1232{
1233}
1234
1235module_init(xarray_checks);
1236module_exit(xarray_exit);
1237MODULE_AUTHOR("Matthew Wilcox <[email protected]>");
1238MODULE_LICENSE("GPL");