1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 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> 7 */ 8 9 #include <linux/xarray.h> 10 #include <linux/module.h> 11 12 static unsigned int tests_run; 13 static unsigned int tests_passed; 14 15 static const unsigned int order_limit = 16 IS_ENABLED(CONFIG_XARRAY_MULTI) ? BITS_PER_LONG : 1; 17 18 #ifndef XA_DEBUG 19 # ifdef __KERNEL__ 20 void xa_dump(const struct xarray *xa) { } 21 # endif 22 #undef XA_BUG_ON 23 #define XA_BUG_ON(xa, x) do { \ 24 tests_run++; \ 25 if (x) { \ 26 printk("BUG at %s:%d\n", __func__, __LINE__); \ 27 xa_dump(xa); \ 28 dump_stack(); \ 29 } else { \ 30 tests_passed++; \ 31 } \ 32 } while (0) 33 #endif 34 35 static void *xa_mk_index(unsigned long index) 36 { 37 return xa_mk_value(index & LONG_MAX); 38 } 39 40 static void *xa_store_index(struct xarray *xa, unsigned long index, gfp_t gfp) 41 { 42 return xa_store(xa, index, xa_mk_index(index), gfp); 43 } 44 45 static void xa_insert_index(struct xarray *xa, unsigned long index) 46 { 47 XA_BUG_ON(xa, xa_insert(xa, index, xa_mk_index(index), 48 GFP_KERNEL) != 0); 49 } 50 51 static void xa_alloc_index(struct xarray *xa, unsigned long index, gfp_t gfp) 52 { 53 u32 id; 54 55 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(index), xa_limit_32b, 56 gfp) != 0); 57 XA_BUG_ON(xa, id != index); 58 } 59 60 static void xa_erase_index(struct xarray *xa, unsigned long index) 61 { 62 XA_BUG_ON(xa, xa_erase(xa, index) != xa_mk_index(index)); 63 XA_BUG_ON(xa, xa_load(xa, index) != NULL); 64 } 65 66 /* 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. 70 */ 71 static void *xa_store_order(struct xarray *xa, unsigned long index, 72 unsigned order, void *entry, gfp_t gfp) 73 { 74 XA_STATE_ORDER(xas, xa, index, order); 75 void *curr; 76 77 do { 78 xas_lock(&xas); 79 curr = xas_store(&xas, entry); 80 xas_unlock(&xas); 81 } while (xas_nomem(&xas, gfp)); 82 83 return curr; 84 } 85 86 static noinline void check_xa_err(struct xarray *xa) 87 { 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); 90 #ifndef __KERNEL__ 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); 94 #endif 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); 100 } 101 102 static noinline void check_xas_retry(struct xarray *xa) 103 { 104 XA_STATE(xas, xa, 0); 105 void *entry; 106 107 xa_store_index(xa, 0, GFP_KERNEL); 108 xa_store_index(xa, 1, GFP_KERNEL); 109 110 rcu_read_lock(); 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))); 116 xas_reset(&xas); 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); 120 rcu_read_unlock(); 121 122 XA_BUG_ON(xa, xa_store_index(xa, 1, GFP_KERNEL) != NULL); 123 124 rcu_read_lock(); 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)); 128 rcu_read_unlock(); 129 130 /* Make sure we can iterate through retry entries */ 131 xas_lock(&xas); 132 xas_set(&xas, 0); 133 xas_store(&xas, XA_RETRY_ENTRY); 134 xas_set(&xas, 1); 135 xas_store(&xas, XA_RETRY_ENTRY); 136 137 xas_set(&xas, 0); 138 xas_for_each(&xas, entry, ULONG_MAX) { 139 xas_store(&xas, xa_mk_index(xas.xa_index)); 140 } 141 xas_unlock(&xas); 142 143 xa_erase_index(xa, 0); 144 xa_erase_index(xa, 1); 145 } 146 147 static noinline void check_xa_load(struct xarray *xa) 148 { 149 unsigned long i, j; 150 151 for (i = 0; i < 1024; i++) { 152 for (j = 0; j < 1024; j++) { 153 void *entry = xa_load(xa, j); 154 if (j < i) 155 XA_BUG_ON(xa, xa_to_value(entry) != j); 156 else 157 XA_BUG_ON(xa, entry); 158 } 159 XA_BUG_ON(xa, xa_store_index(xa, i, GFP_KERNEL) != NULL); 160 } 161 162 for (i = 0; i < 1024; i++) { 163 for (j = 0; j < 1024; j++) { 164 void *entry = xa_load(xa, j); 165 if (j >= i) 166 XA_BUG_ON(xa, xa_to_value(entry) != j); 167 else 168 XA_BUG_ON(xa, entry); 169 } 170 xa_erase_index(xa, i); 171 } 172 XA_BUG_ON(xa, !xa_empty(xa)); 173 } 174 175 static noinline void check_xa_mark_1(struct xarray *xa, unsigned long index) 176 { 177 unsigned int order; 178 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 8 : 1; 179 180 /* 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)); 184 185 /* 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)); 190 191 /* 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)); 194 195 /* 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)); 201 202 /* 203 * Storing a multi-index entry over entries with marks gives the 204 * entire entry the union of the marks 205 */ 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); 210 unsigned long i; 211 212 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), 218 GFP_KERNEL); 219 for (i = base; i < next; i++) { 220 XA_STATE(xas, xa, i); 221 unsigned int seen = 0; 222 void *entry; 223 224 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)); 227 228 /* We should see two elements in the array */ 229 rcu_read_lock(); 230 xas_for_each(&xas, entry, ULONG_MAX) 231 seen++; 232 rcu_read_unlock(); 233 XA_BUG_ON(xa, seen != 2); 234 235 /* One of which is marked */ 236 xas_set(&xas, 0); 237 seen = 0; 238 rcu_read_lock(); 239 xas_for_each_marked(&xas, entry, ULONG_MAX, XA_MARK_0) 240 seen++; 241 rcu_read_unlock(); 242 XA_BUG_ON(xa, seen != 1); 243 } 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)); 250 } 251 XA_BUG_ON(xa, !xa_empty(xa)); 252 } 253 254 static noinline void check_xa_mark_2(struct xarray *xa) 255 { 256 XA_STATE(xas, xa, 0); 257 unsigned long index; 258 unsigned int count = 0; 259 void *entry; 260 261 xa_store_index(xa, 0, GFP_KERNEL); 262 xa_set_mark(xa, 0, XA_MARK_0); 263 xas_lock(&xas); 264 xas_load(&xas); 265 xas_init_marks(&xas); 266 xas_unlock(&xas); 267 XA_BUG_ON(xa, !xa_get_mark(xa, 0, XA_MARK_0) == 0); 268 269 for (index = 3500; index < 4500; index++) { 270 xa_store_index(xa, index, GFP_KERNEL); 271 xa_set_mark(xa, index, XA_MARK_0); 272 } 273 274 xas_reset(&xas); 275 rcu_read_lock(); 276 xas_for_each_marked(&xas, entry, ULONG_MAX, XA_MARK_0) 277 count++; 278 rcu_read_unlock(); 279 XA_BUG_ON(xa, count != 1000); 280 281 xas_lock(&xas); 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)); 286 } 287 xas_unlock(&xas); 288 289 xa_destroy(xa); 290 } 291 292 static noinline void check_xa_mark_3(struct xarray *xa) 293 { 294 #ifdef CONFIG_XARRAY_MULTI 295 XA_STATE(xas, xa, 0x41); 296 void *entry; 297 int count = 0; 298 299 xa_store_order(xa, 0x40, 2, xa_mk_index(0x40), GFP_KERNEL); 300 xa_set_mark(xa, 0x41, XA_MARK_0); 301 302 rcu_read_lock(); 303 xas_for_each_marked(&xas, entry, ULONG_MAX, XA_MARK_0) { 304 count++; 305 XA_BUG_ON(xa, entry != xa_mk_index(0x40)); 306 } 307 XA_BUG_ON(xa, count != 1); 308 rcu_read_unlock(); 309 xa_destroy(xa); 310 #endif 311 } 312 313 static noinline void check_xa_mark(struct xarray *xa) 314 { 315 unsigned long index; 316 317 for (index = 0; index < 16384; index += 4) 318 check_xa_mark_1(xa, index); 319 320 check_xa_mark_2(xa); 321 check_xa_mark_3(xa); 322 } 323 324 static noinline void check_xa_shrink(struct xarray *xa) 325 { 326 XA_STATE(xas, xa, 1); 327 struct xa_node *node; 328 unsigned int order; 329 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 15 : 1; 330 331 XA_BUG_ON(xa, !xa_empty(xa)); 332 XA_BUG_ON(xa, xa_store_index(xa, 0, GFP_KERNEL) != NULL); 333 XA_BUG_ON(xa, xa_store_index(xa, 1, GFP_KERNEL) != NULL); 334 335 /* 336 * Check that erasing the entry at 1 shrinks the tree and properly 337 * marks the node as being deleted. 338 */ 339 xas_lock(&xas); 340 XA_BUG_ON(xa, xas_load(&xas) != xa_mk_value(1)); 341 node = xas.xa_node; 342 XA_BUG_ON(xa, xa_entry_locked(xa, node, 0) != xa_mk_value(0)); 343 XA_BUG_ON(xa, xas_store(&xas, NULL) != xa_mk_value(1)); 344 XA_BUG_ON(xa, xa_load(xa, 1) != NULL); 345 XA_BUG_ON(xa, xas.xa_node != XAS_BOUNDS); 346 XA_BUG_ON(xa, xa_entry_locked(xa, node, 0) != XA_RETRY_ENTRY); 347 XA_BUG_ON(xa, xas_load(&xas) != NULL); 348 xas_unlock(&xas); 349 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(0)); 350 xa_erase_index(xa, 0); 351 XA_BUG_ON(xa, !xa_empty(xa)); 352 353 for (order = 0; order < max_order; order++) { 354 unsigned long max = (1UL << order) - 1; 355 xa_store_order(xa, 0, order, xa_mk_value(0), GFP_KERNEL); 356 XA_BUG_ON(xa, xa_load(xa, max) != xa_mk_value(0)); 357 XA_BUG_ON(xa, xa_load(xa, max + 1) != NULL); 358 rcu_read_lock(); 359 node = xa_head(xa); 360 rcu_read_unlock(); 361 XA_BUG_ON(xa, xa_store_index(xa, ULONG_MAX, GFP_KERNEL) != 362 NULL); 363 rcu_read_lock(); 364 XA_BUG_ON(xa, xa_head(xa) == node); 365 rcu_read_unlock(); 366 XA_BUG_ON(xa, xa_load(xa, max + 1) != NULL); 367 xa_erase_index(xa, ULONG_MAX); 368 XA_BUG_ON(xa, xa->xa_head != node); 369 xa_erase_index(xa, 0); 370 } 371 } 372 373 static noinline void check_insert(struct xarray *xa) 374 { 375 unsigned long i; 376 377 for (i = 0; i < 1024; i++) { 378 xa_insert_index(xa, i); 379 XA_BUG_ON(xa, xa_load(xa, i - 1) != NULL); 380 XA_BUG_ON(xa, xa_load(xa, i + 1) != NULL); 381 xa_erase_index(xa, i); 382 } 383 384 for (i = 10; i < BITS_PER_LONG; i++) { 385 xa_insert_index(xa, 1UL << i); 386 XA_BUG_ON(xa, xa_load(xa, (1UL << i) - 1) != NULL); 387 XA_BUG_ON(xa, xa_load(xa, (1UL << i) + 1) != NULL); 388 xa_erase_index(xa, 1UL << i); 389 390 xa_insert_index(xa, (1UL << i) - 1); 391 XA_BUG_ON(xa, xa_load(xa, (1UL << i) - 2) != NULL); 392 XA_BUG_ON(xa, xa_load(xa, 1UL << i) != NULL); 393 xa_erase_index(xa, (1UL << i) - 1); 394 } 395 396 xa_insert_index(xa, ~0UL); 397 XA_BUG_ON(xa, xa_load(xa, 0UL) != NULL); 398 XA_BUG_ON(xa, xa_load(xa, ~1UL) != NULL); 399 xa_erase_index(xa, ~0UL); 400 401 XA_BUG_ON(xa, !xa_empty(xa)); 402 } 403 404 static noinline void check_cmpxchg(struct xarray *xa) 405 { 406 void *FIVE = xa_mk_value(5); 407 void *SIX = xa_mk_value(6); 408 void *LOTS = xa_mk_value(12345678); 409 410 XA_BUG_ON(xa, !xa_empty(xa)); 411 XA_BUG_ON(xa, xa_store_index(xa, 12345678, GFP_KERNEL) != NULL); 412 XA_BUG_ON(xa, xa_insert(xa, 12345678, xa, GFP_KERNEL) != -EBUSY); 413 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, SIX, FIVE, GFP_KERNEL) != LOTS); 414 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, LOTS, FIVE, GFP_KERNEL) != LOTS); 415 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, FIVE, LOTS, GFP_KERNEL) != FIVE); 416 XA_BUG_ON(xa, xa_cmpxchg(xa, 5, FIVE, NULL, GFP_KERNEL) != NULL); 417 XA_BUG_ON(xa, xa_cmpxchg(xa, 5, NULL, FIVE, GFP_KERNEL) != NULL); 418 XA_BUG_ON(xa, xa_insert(xa, 5, FIVE, GFP_KERNEL) != -EBUSY); 419 XA_BUG_ON(xa, xa_cmpxchg(xa, 5, FIVE, NULL, GFP_KERNEL) != FIVE); 420 XA_BUG_ON(xa, xa_insert(xa, 5, FIVE, GFP_KERNEL) == -EBUSY); 421 xa_erase_index(xa, 12345678); 422 xa_erase_index(xa, 5); 423 XA_BUG_ON(xa, !xa_empty(xa)); 424 } 425 426 static noinline void check_reserve(struct xarray *xa) 427 { 428 void *entry; 429 unsigned long index; 430 int count; 431 432 /* An array with a reserved entry is not empty */ 433 XA_BUG_ON(xa, !xa_empty(xa)); 434 XA_BUG_ON(xa, xa_reserve(xa, 12345678, GFP_KERNEL) != 0); 435 XA_BUG_ON(xa, xa_empty(xa)); 436 XA_BUG_ON(xa, xa_load(xa, 12345678)); 437 xa_release(xa, 12345678); 438 XA_BUG_ON(xa, !xa_empty(xa)); 439 440 /* Releasing a used entry does nothing */ 441 XA_BUG_ON(xa, xa_reserve(xa, 12345678, GFP_KERNEL) != 0); 442 XA_BUG_ON(xa, xa_store_index(xa, 12345678, GFP_NOWAIT) != NULL); 443 xa_release(xa, 12345678); 444 xa_erase_index(xa, 12345678); 445 XA_BUG_ON(xa, !xa_empty(xa)); 446 447 /* cmpxchg sees a reserved entry as ZERO */ 448 XA_BUG_ON(xa, xa_reserve(xa, 12345678, GFP_KERNEL) != 0); 449 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, XA_ZERO_ENTRY, 450 xa_mk_value(12345678), GFP_NOWAIT) != NULL); 451 xa_release(xa, 12345678); 452 xa_erase_index(xa, 12345678); 453 XA_BUG_ON(xa, !xa_empty(xa)); 454 455 /* xa_insert treats it as busy */ 456 XA_BUG_ON(xa, xa_reserve(xa, 12345678, GFP_KERNEL) != 0); 457 XA_BUG_ON(xa, xa_insert(xa, 12345678, xa_mk_value(12345678), 0) != 458 -EBUSY); 459 XA_BUG_ON(xa, xa_empty(xa)); 460 XA_BUG_ON(xa, xa_erase(xa, 12345678) != NULL); 461 XA_BUG_ON(xa, !xa_empty(xa)); 462 463 /* Can iterate through a reserved entry */ 464 xa_store_index(xa, 5, GFP_KERNEL); 465 XA_BUG_ON(xa, xa_reserve(xa, 6, GFP_KERNEL) != 0); 466 xa_store_index(xa, 7, GFP_KERNEL); 467 468 count = 0; 469 xa_for_each(xa, index, entry) { 470 XA_BUG_ON(xa, index != 5 && index != 7); 471 count++; 472 } 473 XA_BUG_ON(xa, count != 2); 474 475 /* If we free a reserved entry, we should be able to allocate it */ 476 if (xa->xa_flags & XA_FLAGS_ALLOC) { 477 u32 id; 478 479 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_value(8), 480 XA_LIMIT(5, 10), GFP_KERNEL) != 0); 481 XA_BUG_ON(xa, id != 8); 482 483 xa_release(xa, 6); 484 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_value(6), 485 XA_LIMIT(5, 10), GFP_KERNEL) != 0); 486 XA_BUG_ON(xa, id != 6); 487 } 488 489 xa_destroy(xa); 490 } 491 492 static noinline void check_xas_erase(struct xarray *xa) 493 { 494 XA_STATE(xas, xa, 0); 495 void *entry; 496 unsigned long i, j; 497 498 for (i = 0; i < 200; i++) { 499 for (j = i; j < 2 * i + 17; j++) { 500 xas_set(&xas, j); 501 do { 502 xas_lock(&xas); 503 xas_store(&xas, xa_mk_index(j)); 504 xas_unlock(&xas); 505 } while (xas_nomem(&xas, GFP_KERNEL)); 506 } 507 508 xas_set(&xas, ULONG_MAX); 509 do { 510 xas_lock(&xas); 511 xas_store(&xas, xa_mk_value(0)); 512 xas_unlock(&xas); 513 } while (xas_nomem(&xas, GFP_KERNEL)); 514 515 xas_lock(&xas); 516 xas_store(&xas, NULL); 517 518 xas_set(&xas, 0); 519 j = i; 520 xas_for_each(&xas, entry, ULONG_MAX) { 521 XA_BUG_ON(xa, entry != xa_mk_index(j)); 522 xas_store(&xas, NULL); 523 j++; 524 } 525 xas_unlock(&xas); 526 XA_BUG_ON(xa, !xa_empty(xa)); 527 } 528 } 529 530 #ifdef CONFIG_XARRAY_MULTI 531 static noinline void check_multi_store_1(struct xarray *xa, unsigned long index, 532 unsigned int order) 533 { 534 XA_STATE(xas, xa, index); 535 unsigned long min = index & ~((1UL << order) - 1); 536 unsigned long max = min + (1UL << order); 537 538 xa_store_order(xa, index, order, xa_mk_index(index), GFP_KERNEL); 539 XA_BUG_ON(xa, xa_load(xa, min) != xa_mk_index(index)); 540 XA_BUG_ON(xa, xa_load(xa, max - 1) != xa_mk_index(index)); 541 XA_BUG_ON(xa, xa_load(xa, max) != NULL); 542 XA_BUG_ON(xa, xa_load(xa, min - 1) != NULL); 543 544 xas_lock(&xas); 545 XA_BUG_ON(xa, xas_store(&xas, xa_mk_index(min)) != xa_mk_index(index)); 546 xas_unlock(&xas); 547 XA_BUG_ON(xa, xa_load(xa, min) != xa_mk_index(min)); 548 XA_BUG_ON(xa, xa_load(xa, max - 1) != xa_mk_index(min)); 549 XA_BUG_ON(xa, xa_load(xa, max) != NULL); 550 XA_BUG_ON(xa, xa_load(xa, min - 1) != NULL); 551 552 xa_erase_index(xa, min); 553 XA_BUG_ON(xa, !xa_empty(xa)); 554 } 555 556 static noinline void check_multi_store_2(struct xarray *xa, unsigned long index, 557 unsigned int order) 558 { 559 XA_STATE(xas, xa, index); 560 xa_store_order(xa, index, order, xa_mk_value(0), GFP_KERNEL); 561 562 xas_lock(&xas); 563 XA_BUG_ON(xa, xas_store(&xas, xa_mk_value(1)) != xa_mk_value(0)); 564 XA_BUG_ON(xa, xas.xa_index != index); 565 XA_BUG_ON(xa, xas_store(&xas, NULL) != xa_mk_value(1)); 566 xas_unlock(&xas); 567 XA_BUG_ON(xa, !xa_empty(xa)); 568 } 569 570 static noinline void check_multi_store_3(struct xarray *xa, unsigned long index, 571 unsigned int order) 572 { 573 XA_STATE(xas, xa, 0); 574 void *entry; 575 int n = 0; 576 577 xa_store_order(xa, index, order, xa_mk_index(index), GFP_KERNEL); 578 579 xas_lock(&xas); 580 xas_for_each(&xas, entry, ULONG_MAX) { 581 XA_BUG_ON(xa, entry != xa_mk_index(index)); 582 n++; 583 } 584 XA_BUG_ON(xa, n != 1); 585 xas_set(&xas, index + 1); 586 xas_for_each(&xas, entry, ULONG_MAX) { 587 XA_BUG_ON(xa, entry != xa_mk_index(index)); 588 n++; 589 } 590 XA_BUG_ON(xa, n != 2); 591 xas_unlock(&xas); 592 593 xa_destroy(xa); 594 } 595 #endif 596 597 static noinline void check_multi_store(struct xarray *xa) 598 { 599 #ifdef CONFIG_XARRAY_MULTI 600 unsigned long i, j, k; 601 unsigned int max_order = (sizeof(long) == 4) ? 30 : 60; 602 603 /* Loading from any position returns the same value */ 604 xa_store_order(xa, 0, 1, xa_mk_value(0), GFP_KERNEL); 605 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(0)); 606 XA_BUG_ON(xa, xa_load(xa, 1) != xa_mk_value(0)); 607 XA_BUG_ON(xa, xa_load(xa, 2) != NULL); 608 rcu_read_lock(); 609 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->count != 2); 610 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->nr_values != 2); 611 rcu_read_unlock(); 612 613 /* Storing adjacent to the value does not alter the value */ 614 xa_store(xa, 3, xa, GFP_KERNEL); 615 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(0)); 616 XA_BUG_ON(xa, xa_load(xa, 1) != xa_mk_value(0)); 617 XA_BUG_ON(xa, xa_load(xa, 2) != NULL); 618 rcu_read_lock(); 619 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->count != 3); 620 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->nr_values != 2); 621 rcu_read_unlock(); 622 623 /* Overwriting multiple indexes works */ 624 xa_store_order(xa, 0, 2, xa_mk_value(1), GFP_KERNEL); 625 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(1)); 626 XA_BUG_ON(xa, xa_load(xa, 1) != xa_mk_value(1)); 627 XA_BUG_ON(xa, xa_load(xa, 2) != xa_mk_value(1)); 628 XA_BUG_ON(xa, xa_load(xa, 3) != xa_mk_value(1)); 629 XA_BUG_ON(xa, xa_load(xa, 4) != NULL); 630 rcu_read_lock(); 631 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->count != 4); 632 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->nr_values != 4); 633 rcu_read_unlock(); 634 635 /* We can erase multiple values with a single store */ 636 xa_store_order(xa, 0, BITS_PER_LONG - 1, NULL, GFP_KERNEL); 637 XA_BUG_ON(xa, !xa_empty(xa)); 638 639 /* Even when the first slot is empty but the others aren't */ 640 xa_store_index(xa, 1, GFP_KERNEL); 641 xa_store_index(xa, 2, GFP_KERNEL); 642 xa_store_order(xa, 0, 2, NULL, GFP_KERNEL); 643 XA_BUG_ON(xa, !xa_empty(xa)); 644 645 for (i = 0; i < max_order; i++) { 646 for (j = 0; j < max_order; j++) { 647 xa_store_order(xa, 0, i, xa_mk_index(i), GFP_KERNEL); 648 xa_store_order(xa, 0, j, xa_mk_index(j), GFP_KERNEL); 649 650 for (k = 0; k < max_order; k++) { 651 void *entry = xa_load(xa, (1UL << k) - 1); 652 if ((i < k) && (j < k)) 653 XA_BUG_ON(xa, entry != NULL); 654 else 655 XA_BUG_ON(xa, entry != xa_mk_index(j)); 656 } 657 658 xa_erase(xa, 0); 659 XA_BUG_ON(xa, !xa_empty(xa)); 660 } 661 } 662 663 for (i = 0; i < 20; i++) { 664 check_multi_store_1(xa, 200, i); 665 check_multi_store_1(xa, 0, i); 666 check_multi_store_1(xa, (1UL << i) + 1, i); 667 } 668 check_multi_store_2(xa, 4095, 9); 669 670 for (i = 1; i < 20; i++) { 671 check_multi_store_3(xa, 0, i); 672 check_multi_store_3(xa, 1UL << i, i); 673 } 674 #endif 675 } 676 677 static noinline void check_xa_alloc_1(struct xarray *xa, unsigned int base) 678 { 679 int i; 680 u32 id; 681 682 XA_BUG_ON(xa, !xa_empty(xa)); 683 /* An empty array should assign %base to the first alloc */ 684 xa_alloc_index(xa, base, GFP_KERNEL); 685 686 /* Erasing it should make the array empty again */ 687 xa_erase_index(xa, base); 688 XA_BUG_ON(xa, !xa_empty(xa)); 689 690 /* And it should assign %base again */ 691 xa_alloc_index(xa, base, GFP_KERNEL); 692 693 /* Allocating and then erasing a lot should not lose base */ 694 for (i = base + 1; i < 2 * XA_CHUNK_SIZE; i++) 695 xa_alloc_index(xa, i, GFP_KERNEL); 696 for (i = base; i < 2 * XA_CHUNK_SIZE; i++) 697 xa_erase_index(xa, i); 698 xa_alloc_index(xa, base, GFP_KERNEL); 699 700 /* Destroying the array should do the same as erasing */ 701 xa_destroy(xa); 702 703 /* And it should assign %base again */ 704 xa_alloc_index(xa, base, GFP_KERNEL); 705 706 /* The next assigned ID should be base+1 */ 707 xa_alloc_index(xa, base + 1, GFP_KERNEL); 708 xa_erase_index(xa, base + 1); 709 710 /* Storing a value should mark it used */ 711 xa_store_index(xa, base + 1, GFP_KERNEL); 712 xa_alloc_index(xa, base + 2, GFP_KERNEL); 713 714 /* If we then erase base, it should be free */ 715 xa_erase_index(xa, base); 716 xa_alloc_index(xa, base, GFP_KERNEL); 717 718 xa_erase_index(xa, base + 1); 719 xa_erase_index(xa, base + 2); 720 721 for (i = 1; i < 5000; i++) { 722 xa_alloc_index(xa, base + i, GFP_KERNEL); 723 } 724 725 xa_destroy(xa); 726 727 /* Check that we fail properly at the limit of allocation */ 728 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(UINT_MAX - 1), 729 XA_LIMIT(UINT_MAX - 1, UINT_MAX), 730 GFP_KERNEL) != 0); 731 XA_BUG_ON(xa, id != 0xfffffffeU); 732 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(UINT_MAX), 733 XA_LIMIT(UINT_MAX - 1, UINT_MAX), 734 GFP_KERNEL) != 0); 735 XA_BUG_ON(xa, id != 0xffffffffU); 736 id = 3; 737 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(0), 738 XA_LIMIT(UINT_MAX - 1, UINT_MAX), 739 GFP_KERNEL) != -EBUSY); 740 XA_BUG_ON(xa, id != 3); 741 xa_destroy(xa); 742 743 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(10), XA_LIMIT(10, 5), 744 GFP_KERNEL) != -EBUSY); 745 XA_BUG_ON(xa, xa_store_index(xa, 3, GFP_KERNEL) != 0); 746 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(10), XA_LIMIT(10, 5), 747 GFP_KERNEL) != -EBUSY); 748 xa_erase_index(xa, 3); 749 XA_BUG_ON(xa, !xa_empty(xa)); 750 } 751 752 static noinline void check_xa_alloc_2(struct xarray *xa, unsigned int base) 753 { 754 unsigned int i, id; 755 unsigned long index; 756 void *entry; 757 758 /* Allocate and free a NULL and check xa_empty() behaves */ 759 XA_BUG_ON(xa, !xa_empty(xa)); 760 XA_BUG_ON(xa, xa_alloc(xa, &id, NULL, xa_limit_32b, GFP_KERNEL) != 0); 761 XA_BUG_ON(xa, id != base); 762 XA_BUG_ON(xa, xa_empty(xa)); 763 XA_BUG_ON(xa, xa_erase(xa, id) != NULL); 764 XA_BUG_ON(xa, !xa_empty(xa)); 765 766 /* Ditto, but check destroy instead of erase */ 767 XA_BUG_ON(xa, !xa_empty(xa)); 768 XA_BUG_ON(xa, xa_alloc(xa, &id, NULL, xa_limit_32b, GFP_KERNEL) != 0); 769 XA_BUG_ON(xa, id != base); 770 XA_BUG_ON(xa, xa_empty(xa)); 771 xa_destroy(xa); 772 XA_BUG_ON(xa, !xa_empty(xa)); 773 774 for (i = base; i < base + 10; i++) { 775 XA_BUG_ON(xa, xa_alloc(xa, &id, NULL, xa_limit_32b, 776 GFP_KERNEL) != 0); 777 XA_BUG_ON(xa, id != i); 778 } 779 780 XA_BUG_ON(xa, xa_store(xa, 3, xa_mk_index(3), GFP_KERNEL) != NULL); 781 XA_BUG_ON(xa, xa_store(xa, 4, xa_mk_index(4), GFP_KERNEL) != NULL); 782 XA_BUG_ON(xa, xa_store(xa, 4, NULL, GFP_KERNEL) != xa_mk_index(4)); 783 XA_BUG_ON(xa, xa_erase(xa, 5) != NULL); 784 XA_BUG_ON(xa, xa_alloc(xa, &id, NULL, xa_limit_32b, GFP_KERNEL) != 0); 785 XA_BUG_ON(xa, id != 5); 786 787 xa_for_each(xa, index, entry) { 788 xa_erase_index(xa, index); 789 } 790 791 for (i = base; i < base + 9; i++) { 792 XA_BUG_ON(xa, xa_erase(xa, i) != NULL); 793 XA_BUG_ON(xa, xa_empty(xa)); 794 } 795 XA_BUG_ON(xa, xa_erase(xa, 8) != NULL); 796 XA_BUG_ON(xa, xa_empty(xa)); 797 XA_BUG_ON(xa, xa_erase(xa, base + 9) != NULL); 798 XA_BUG_ON(xa, !xa_empty(xa)); 799 800 xa_destroy(xa); 801 } 802 803 static noinline void check_xa_alloc_3(struct xarray *xa, unsigned int base) 804 { 805 struct xa_limit limit = XA_LIMIT(1, 0x3fff); 806 u32 next = 0; 807 unsigned int i, id; 808 unsigned long index; 809 void *entry; 810 811 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, xa_mk_index(1), limit, 812 &next, GFP_KERNEL) != 0); 813 XA_BUG_ON(xa, id != 1); 814 815 next = 0x3ffd; 816 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, xa_mk_index(0x3ffd), limit, 817 &next, GFP_KERNEL) != 0); 818 XA_BUG_ON(xa, id != 0x3ffd); 819 xa_erase_index(xa, 0x3ffd); 820 xa_erase_index(xa, 1); 821 XA_BUG_ON(xa, !xa_empty(xa)); 822 823 for (i = 0x3ffe; i < 0x4003; i++) { 824 if (i < 0x4000) 825 entry = xa_mk_index(i); 826 else 827 entry = xa_mk_index(i - 0x3fff); 828 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, entry, limit, 829 &next, GFP_KERNEL) != (id == 1)); 830 XA_BUG_ON(xa, xa_mk_index(id) != entry); 831 } 832 833 /* Check wrap-around is handled correctly */ 834 if (base != 0) 835 xa_erase_index(xa, base); 836 xa_erase_index(xa, base + 1); 837 next = UINT_MAX; 838 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, xa_mk_index(UINT_MAX), 839 xa_limit_32b, &next, GFP_KERNEL) != 0); 840 XA_BUG_ON(xa, id != UINT_MAX); 841 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, xa_mk_index(base), 842 xa_limit_32b, &next, GFP_KERNEL) != 1); 843 XA_BUG_ON(xa, id != base); 844 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, xa_mk_index(base + 1), 845 xa_limit_32b, &next, GFP_KERNEL) != 0); 846 XA_BUG_ON(xa, id != base + 1); 847 848 xa_for_each(xa, index, entry) 849 xa_erase_index(xa, index); 850 851 XA_BUG_ON(xa, !xa_empty(xa)); 852 } 853 854 static DEFINE_XARRAY_ALLOC(xa0); 855 static DEFINE_XARRAY_ALLOC1(xa1); 856 857 static noinline void check_xa_alloc(void) 858 { 859 check_xa_alloc_1(&xa0, 0); 860 check_xa_alloc_1(&xa1, 1); 861 check_xa_alloc_2(&xa0, 0); 862 check_xa_alloc_2(&xa1, 1); 863 check_xa_alloc_3(&xa0, 0); 864 check_xa_alloc_3(&xa1, 1); 865 } 866 867 static noinline void __check_store_iter(struct xarray *xa, unsigned long start, 868 unsigned int order, unsigned int present) 869 { 870 XA_STATE_ORDER(xas, xa, start, order); 871 void *entry; 872 unsigned int count = 0; 873 874 retry: 875 xas_lock(&xas); 876 xas_for_each_conflict(&xas, entry) { 877 XA_BUG_ON(xa, !xa_is_value(entry)); 878 XA_BUG_ON(xa, entry < xa_mk_index(start)); 879 XA_BUG_ON(xa, entry > xa_mk_index(start + (1UL << order) - 1)); 880 count++; 881 } 882 xas_store(&xas, xa_mk_index(start)); 883 xas_unlock(&xas); 884 if (xas_nomem(&xas, GFP_KERNEL)) { 885 count = 0; 886 goto retry; 887 } 888 XA_BUG_ON(xa, xas_error(&xas)); 889 XA_BUG_ON(xa, count != present); 890 XA_BUG_ON(xa, xa_load(xa, start) != xa_mk_index(start)); 891 XA_BUG_ON(xa, xa_load(xa, start + (1UL << order) - 1) != 892 xa_mk_index(start)); 893 xa_erase_index(xa, start); 894 } 895 896 static noinline void check_store_iter(struct xarray *xa) 897 { 898 unsigned int i, j; 899 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 20 : 1; 900 901 for (i = 0; i < max_order; i++) { 902 unsigned int min = 1 << i; 903 unsigned int max = (2 << i) - 1; 904 __check_store_iter(xa, 0, i, 0); 905 XA_BUG_ON(xa, !xa_empty(xa)); 906 __check_store_iter(xa, min, i, 0); 907 XA_BUG_ON(xa, !xa_empty(xa)); 908 909 xa_store_index(xa, min, GFP_KERNEL); 910 __check_store_iter(xa, min, i, 1); 911 XA_BUG_ON(xa, !xa_empty(xa)); 912 xa_store_index(xa, max, GFP_KERNEL); 913 __check_store_iter(xa, min, i, 1); 914 XA_BUG_ON(xa, !xa_empty(xa)); 915 916 for (j = 0; j < min; j++) 917 xa_store_index(xa, j, GFP_KERNEL); 918 __check_store_iter(xa, 0, i, min); 919 XA_BUG_ON(xa, !xa_empty(xa)); 920 for (j = 0; j < min; j++) 921 xa_store_index(xa, min + j, GFP_KERNEL); 922 __check_store_iter(xa, min, i, min); 923 XA_BUG_ON(xa, !xa_empty(xa)); 924 } 925 #ifdef CONFIG_XARRAY_MULTI 926 xa_store_index(xa, 63, GFP_KERNEL); 927 xa_store_index(xa, 65, GFP_KERNEL); 928 __check_store_iter(xa, 64, 2, 1); 929 xa_erase_index(xa, 63); 930 #endif 931 XA_BUG_ON(xa, !xa_empty(xa)); 932 } 933 934 static noinline void check_multi_find_1(struct xarray *xa, unsigned order) 935 { 936 #ifdef CONFIG_XARRAY_MULTI 937 unsigned long multi = 3 << order; 938 unsigned long next = 4 << order; 939 unsigned long index; 940 941 xa_store_order(xa, multi, order, xa_mk_value(multi), GFP_KERNEL); 942 XA_BUG_ON(xa, xa_store_index(xa, next, GFP_KERNEL) != NULL); 943 XA_BUG_ON(xa, xa_store_index(xa, next + 1, GFP_KERNEL) != NULL); 944 945 index = 0; 946 XA_BUG_ON(xa, xa_find(xa, &index, ULONG_MAX, XA_PRESENT) != 947 xa_mk_value(multi)); 948 XA_BUG_ON(xa, index != multi); 949 index = multi + 1; 950 XA_BUG_ON(xa, xa_find(xa, &index, ULONG_MAX, XA_PRESENT) != 951 xa_mk_value(multi)); 952 XA_BUG_ON(xa, (index < multi) || (index >= next)); 953 XA_BUG_ON(xa, xa_find_after(xa, &index, ULONG_MAX, XA_PRESENT) != 954 xa_mk_value(next)); 955 XA_BUG_ON(xa, index != next); 956 XA_BUG_ON(xa, xa_find_after(xa, &index, next, XA_PRESENT) != NULL); 957 XA_BUG_ON(xa, index != next); 958 959 xa_erase_index(xa, multi); 960 xa_erase_index(xa, next); 961 xa_erase_index(xa, next + 1); 962 XA_BUG_ON(xa, !xa_empty(xa)); 963 #endif 964 } 965 966 static noinline void check_multi_find_2(struct xarray *xa) 967 { 968 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 10 : 1; 969 unsigned int i, j; 970 void *entry; 971 972 for (i = 0; i < max_order; i++) { 973 unsigned long index = 1UL << i; 974 for (j = 0; j < index; j++) { 975 XA_STATE(xas, xa, j + index); 976 xa_store_index(xa, index - 1, GFP_KERNEL); 977 xa_store_order(xa, index, i, xa_mk_index(index), 978 GFP_KERNEL); 979 rcu_read_lock(); 980 xas_for_each(&xas, entry, ULONG_MAX) { 981 xa_erase_index(xa, index); 982 } 983 rcu_read_unlock(); 984 xa_erase_index(xa, index - 1); 985 XA_BUG_ON(xa, !xa_empty(xa)); 986 } 987 } 988 } 989 990 static noinline void check_multi_find_3(struct xarray *xa) 991 { 992 unsigned int order; 993 994 for (order = 5; order < order_limit; order++) { 995 unsigned long index = 1UL << (order - 5); 996 997 XA_BUG_ON(xa, !xa_empty(xa)); 998 xa_store_order(xa, 0, order - 4, xa_mk_index(0), GFP_KERNEL); 999 XA_BUG_ON(xa, xa_find_after(xa, &index, ULONG_MAX, XA_PRESENT)); 1000 xa_erase_index(xa, 0); 1001 } 1002 } 1003 1004 static noinline void check_find_1(struct xarray *xa) 1005 { 1006 unsigned long i, j, k; 1007 1008 XA_BUG_ON(xa, !xa_empty(xa)); 1009 1010 /* 1011 * Check xa_find with all pairs between 0 and 99 inclusive, 1012 * starting at every index between 0 and 99 1013 */ 1014 for (i = 0; i < 100; i++) { 1015 XA_BUG_ON(xa, xa_store_index(xa, i, GFP_KERNEL) != NULL); 1016 xa_set_mark(xa, i, XA_MARK_0); 1017 for (j = 0; j < i; j++) { 1018 XA_BUG_ON(xa, xa_store_index(xa, j, GFP_KERNEL) != 1019 NULL); 1020 xa_set_mark(xa, j, XA_MARK_0); 1021 for (k = 0; k < 100; k++) { 1022 unsigned long index = k; 1023 void *entry = xa_find(xa, &index, ULONG_MAX, 1024 XA_PRESENT); 1025 if (k <= j) 1026 XA_BUG_ON(xa, index != j); 1027 else if (k <= i) 1028 XA_BUG_ON(xa, index != i); 1029 else 1030 XA_BUG_ON(xa, entry != NULL); 1031 1032 index = k; 1033 entry = xa_find(xa, &index, ULONG_MAX, 1034 XA_MARK_0); 1035 if (k <= j) 1036 XA_BUG_ON(xa, index != j); 1037 else if (k <= i) 1038 XA_BUG_ON(xa, index != i); 1039 else 1040 XA_BUG_ON(xa, entry != NULL); 1041 } 1042 xa_erase_index(xa, j); 1043 XA_BUG_ON(xa, xa_get_mark(xa, j, XA_MARK_0)); 1044 XA_BUG_ON(xa, !xa_get_mark(xa, i, XA_MARK_0)); 1045 } 1046 xa_erase_index(xa, i); 1047 XA_BUG_ON(xa, xa_get_mark(xa, i, XA_MARK_0)); 1048 } 1049 XA_BUG_ON(xa, !xa_empty(xa)); 1050 } 1051 1052 static noinline void check_find_2(struct xarray *xa) 1053 { 1054 void *entry; 1055 unsigned long i, j, index; 1056 1057 xa_for_each(xa, index, entry) { 1058 XA_BUG_ON(xa, true); 1059 } 1060 1061 for (i = 0; i < 1024; i++) { 1062 xa_store_index(xa, index, GFP_KERNEL); 1063 j = 0; 1064 xa_for_each(xa, index, entry) { 1065 XA_BUG_ON(xa, xa_mk_index(index) != entry); 1066 XA_BUG_ON(xa, index != j++); 1067 } 1068 } 1069 1070 xa_destroy(xa); 1071 } 1072 1073 static noinline void check_find_3(struct xarray *xa) 1074 { 1075 XA_STATE(xas, xa, 0); 1076 unsigned long i, j, k; 1077 void *entry; 1078 1079 for (i = 0; i < 100; i++) { 1080 for (j = 0; j < 100; j++) { 1081 rcu_read_lock(); 1082 for (k = 0; k < 100; k++) { 1083 xas_set(&xas, j); 1084 xas_for_each_marked(&xas, entry, k, XA_MARK_0) 1085 ; 1086 if (j > k) 1087 XA_BUG_ON(xa, 1088 xas.xa_node != XAS_RESTART); 1089 } 1090 rcu_read_unlock(); 1091 } 1092 xa_store_index(xa, i, GFP_KERNEL); 1093 xa_set_mark(xa, i, XA_MARK_0); 1094 } 1095 xa_destroy(xa); 1096 } 1097 1098 static noinline void check_find_4(struct xarray *xa) 1099 { 1100 unsigned long index = 0; 1101 void *entry; 1102 1103 xa_store_index(xa, ULONG_MAX, GFP_KERNEL); 1104 1105 entry = xa_find_after(xa, &index, ULONG_MAX, XA_PRESENT); 1106 XA_BUG_ON(xa, entry != xa_mk_index(ULONG_MAX)); 1107 1108 entry = xa_find_after(xa, &index, ULONG_MAX, XA_PRESENT); 1109 XA_BUG_ON(xa, entry); 1110 1111 xa_erase_index(xa, ULONG_MAX); 1112 } 1113 1114 static noinline void check_find(struct xarray *xa) 1115 { 1116 unsigned i; 1117 1118 check_find_1(xa); 1119 check_find_2(xa); 1120 check_find_3(xa); 1121 check_find_4(xa); 1122 1123 for (i = 2; i < 10; i++) 1124 check_multi_find_1(xa, i); 1125 check_multi_find_2(xa); 1126 check_multi_find_3(xa); 1127 } 1128 1129 /* See find_swap_entry() in mm/shmem.c */ 1130 static noinline unsigned long xa_find_entry(struct xarray *xa, void *item) 1131 { 1132 XA_STATE(xas, xa, 0); 1133 unsigned int checked = 0; 1134 void *entry; 1135 1136 rcu_read_lock(); 1137 xas_for_each(&xas, entry, ULONG_MAX) { 1138 if (xas_retry(&xas, entry)) 1139 continue; 1140 if (entry == item) 1141 break; 1142 checked++; 1143 if ((checked % 4) != 0) 1144 continue; 1145 xas_pause(&xas); 1146 } 1147 rcu_read_unlock(); 1148 1149 return entry ? xas.xa_index : -1; 1150 } 1151 1152 static noinline void check_find_entry(struct xarray *xa) 1153 { 1154 #ifdef CONFIG_XARRAY_MULTI 1155 unsigned int order; 1156 unsigned long offset, index; 1157 1158 for (order = 0; order < 20; order++) { 1159 for (offset = 0; offset < (1UL << (order + 3)); 1160 offset += (1UL << order)) { 1161 for (index = 0; index < (1UL << (order + 5)); 1162 index += (1UL << order)) { 1163 xa_store_order(xa, index, order, 1164 xa_mk_index(index), GFP_KERNEL); 1165 XA_BUG_ON(xa, xa_load(xa, index) != 1166 xa_mk_index(index)); 1167 XA_BUG_ON(xa, xa_find_entry(xa, 1168 xa_mk_index(index)) != index); 1169 } 1170 XA_BUG_ON(xa, xa_find_entry(xa, xa) != -1); 1171 xa_destroy(xa); 1172 } 1173 } 1174 #endif 1175 1176 XA_BUG_ON(xa, xa_find_entry(xa, xa) != -1); 1177 xa_store_index(xa, ULONG_MAX, GFP_KERNEL); 1178 XA_BUG_ON(xa, xa_find_entry(xa, xa) != -1); 1179 XA_BUG_ON(xa, xa_find_entry(xa, xa_mk_index(ULONG_MAX)) != -1); 1180 xa_erase_index(xa, ULONG_MAX); 1181 XA_BUG_ON(xa, !xa_empty(xa)); 1182 } 1183 1184 static noinline void check_pause(struct xarray *xa) 1185 { 1186 XA_STATE(xas, xa, 0); 1187 void *entry; 1188 unsigned int order; 1189 unsigned long index = 1; 1190 unsigned int count = 0; 1191 1192 for (order = 0; order < order_limit; order++) { 1193 XA_BUG_ON(xa, xa_store_order(xa, index, order, 1194 xa_mk_index(index), GFP_KERNEL)); 1195 index += 1UL << order; 1196 } 1197 1198 rcu_read_lock(); 1199 xas_for_each(&xas, entry, ULONG_MAX) { 1200 XA_BUG_ON(xa, entry != xa_mk_index(1UL << count)); 1201 count++; 1202 } 1203 rcu_read_unlock(); 1204 XA_BUG_ON(xa, count != order_limit); 1205 1206 count = 0; 1207 xas_set(&xas, 0); 1208 rcu_read_lock(); 1209 xas_for_each(&xas, entry, ULONG_MAX) { 1210 XA_BUG_ON(xa, entry != xa_mk_index(1UL << count)); 1211 count++; 1212 xas_pause(&xas); 1213 } 1214 rcu_read_unlock(); 1215 XA_BUG_ON(xa, count != order_limit); 1216 1217 xa_destroy(xa); 1218 } 1219 1220 static noinline void check_move_tiny(struct xarray *xa) 1221 { 1222 XA_STATE(xas, xa, 0); 1223 1224 XA_BUG_ON(xa, !xa_empty(xa)); 1225 rcu_read_lock(); 1226 XA_BUG_ON(xa, xas_next(&xas) != NULL); 1227 XA_BUG_ON(xa, xas_next(&xas) != NULL); 1228 rcu_read_unlock(); 1229 xa_store_index(xa, 0, GFP_KERNEL); 1230 rcu_read_lock(); 1231 xas_set(&xas, 0); 1232 XA_BUG_ON(xa, xas_next(&xas) != xa_mk_index(0)); 1233 XA_BUG_ON(xa, xas_next(&xas) != NULL); 1234 xas_set(&xas, 0); 1235 XA_BUG_ON(xa, xas_prev(&xas) != xa_mk_index(0)); 1236 XA_BUG_ON(xa, xas_prev(&xas) != NULL); 1237 rcu_read_unlock(); 1238 xa_erase_index(xa, 0); 1239 XA_BUG_ON(xa, !xa_empty(xa)); 1240 } 1241 1242 static noinline void check_move_max(struct xarray *xa) 1243 { 1244 XA_STATE(xas, xa, 0); 1245 1246 xa_store_index(xa, ULONG_MAX, GFP_KERNEL); 1247 rcu_read_lock(); 1248 XA_BUG_ON(xa, xas_find(&xas, ULONG_MAX) != xa_mk_index(ULONG_MAX)); 1249 XA_BUG_ON(xa, xas_find(&xas, ULONG_MAX) != NULL); 1250 rcu_read_unlock(); 1251 1252 xas_set(&xas, 0); 1253 rcu_read_lock(); 1254 XA_BUG_ON(xa, xas_find(&xas, ULONG_MAX) != xa_mk_index(ULONG_MAX)); 1255 xas_pause(&xas); 1256 XA_BUG_ON(xa, xas_find(&xas, ULONG_MAX) != NULL); 1257 rcu_read_unlock(); 1258 1259 xa_erase_index(xa, ULONG_MAX); 1260 XA_BUG_ON(xa, !xa_empty(xa)); 1261 } 1262 1263 static noinline void check_move_small(struct xarray *xa, unsigned long idx) 1264 { 1265 XA_STATE(xas, xa, 0); 1266 unsigned long i; 1267 1268 xa_store_index(xa, 0, GFP_KERNEL); 1269 xa_store_index(xa, idx, GFP_KERNEL); 1270 1271 rcu_read_lock(); 1272 for (i = 0; i < idx * 4; i++) { 1273 void *entry = xas_next(&xas); 1274 if (i <= idx) 1275 XA_BUG_ON(xa, xas.xa_node == XAS_RESTART); 1276 XA_BUG_ON(xa, xas.xa_index != i); 1277 if (i == 0 || i == idx) 1278 XA_BUG_ON(xa, entry != xa_mk_index(i)); 1279 else 1280 XA_BUG_ON(xa, entry != NULL); 1281 } 1282 xas_next(&xas); 1283 XA_BUG_ON(xa, xas.xa_index != i); 1284 1285 do { 1286 void *entry = xas_prev(&xas); 1287 i--; 1288 if (i <= idx) 1289 XA_BUG_ON(xa, xas.xa_node == XAS_RESTART); 1290 XA_BUG_ON(xa, xas.xa_index != i); 1291 if (i == 0 || i == idx) 1292 XA_BUG_ON(xa, entry != xa_mk_index(i)); 1293 else 1294 XA_BUG_ON(xa, entry != NULL); 1295 } while (i > 0); 1296 1297 xas_set(&xas, ULONG_MAX); 1298 XA_BUG_ON(xa, xas_next(&xas) != NULL); 1299 XA_BUG_ON(xa, xas.xa_index != ULONG_MAX); 1300 XA_BUG_ON(xa, xas_next(&xas) != xa_mk_value(0)); 1301 XA_BUG_ON(xa, xas.xa_index != 0); 1302 XA_BUG_ON(xa, xas_prev(&xas) != NULL); 1303 XA_BUG_ON(xa, xas.xa_index != ULONG_MAX); 1304 rcu_read_unlock(); 1305 1306 xa_erase_index(xa, 0); 1307 xa_erase_index(xa, idx); 1308 XA_BUG_ON(xa, !xa_empty(xa)); 1309 } 1310 1311 static noinline void check_move(struct xarray *xa) 1312 { 1313 XA_STATE(xas, xa, (1 << 16) - 1); 1314 unsigned long i; 1315 1316 for (i = 0; i < (1 << 16); i++) 1317 XA_BUG_ON(xa, xa_store_index(xa, i, GFP_KERNEL) != NULL); 1318 1319 rcu_read_lock(); 1320 do { 1321 void *entry = xas_prev(&xas); 1322 i--; 1323 XA_BUG_ON(xa, entry != xa_mk_index(i)); 1324 XA_BUG_ON(xa, i != xas.xa_index); 1325 } while (i != 0); 1326 1327 XA_BUG_ON(xa, xas_prev(&xas) != NULL); 1328 XA_BUG_ON(xa, xas.xa_index != ULONG_MAX); 1329 1330 do { 1331 void *entry = xas_next(&xas); 1332 XA_BUG_ON(xa, entry != xa_mk_index(i)); 1333 XA_BUG_ON(xa, i != xas.xa_index); 1334 i++; 1335 } while (i < (1 << 16)); 1336 rcu_read_unlock(); 1337 1338 for (i = (1 << 8); i < (1 << 15); i++) 1339 xa_erase_index(xa, i); 1340 1341 i = xas.xa_index; 1342 1343 rcu_read_lock(); 1344 do { 1345 void *entry = xas_prev(&xas); 1346 i--; 1347 if ((i < (1 << 8)) || (i >= (1 << 15))) 1348 XA_BUG_ON(xa, entry != xa_mk_index(i)); 1349 else 1350 XA_BUG_ON(xa, entry != NULL); 1351 XA_BUG_ON(xa, i != xas.xa_index); 1352 } while (i != 0); 1353 1354 XA_BUG_ON(xa, xas_prev(&xas) != NULL); 1355 XA_BUG_ON(xa, xas.xa_index != ULONG_MAX); 1356 1357 do { 1358 void *entry = xas_next(&xas); 1359 if ((i < (1 << 8)) || (i >= (1 << 15))) 1360 XA_BUG_ON(xa, entry != xa_mk_index(i)); 1361 else 1362 XA_BUG_ON(xa, entry != NULL); 1363 XA_BUG_ON(xa, i != xas.xa_index); 1364 i++; 1365 } while (i < (1 << 16)); 1366 rcu_read_unlock(); 1367 1368 xa_destroy(xa); 1369 1370 check_move_tiny(xa); 1371 check_move_max(xa); 1372 1373 for (i = 0; i < 16; i++) 1374 check_move_small(xa, 1UL << i); 1375 1376 for (i = 2; i < 16; i++) 1377 check_move_small(xa, (1UL << i) - 1); 1378 } 1379 1380 static noinline void xa_store_many_order(struct xarray *xa, 1381 unsigned long index, unsigned order) 1382 { 1383 XA_STATE_ORDER(xas, xa, index, order); 1384 unsigned int i = 0; 1385 1386 do { 1387 xas_lock(&xas); 1388 XA_BUG_ON(xa, xas_find_conflict(&xas)); 1389 xas_create_range(&xas); 1390 if (xas_error(&xas)) 1391 goto unlock; 1392 for (i = 0; i < (1U << order); i++) { 1393 XA_BUG_ON(xa, xas_store(&xas, xa_mk_index(index + i))); 1394 xas_next(&xas); 1395 } 1396 unlock: 1397 xas_unlock(&xas); 1398 } while (xas_nomem(&xas, GFP_KERNEL)); 1399 1400 XA_BUG_ON(xa, xas_error(&xas)); 1401 } 1402 1403 static noinline void check_create_range_1(struct xarray *xa, 1404 unsigned long index, unsigned order) 1405 { 1406 unsigned long i; 1407 1408 xa_store_many_order(xa, index, order); 1409 for (i = index; i < index + (1UL << order); i++) 1410 xa_erase_index(xa, i); 1411 XA_BUG_ON(xa, !xa_empty(xa)); 1412 } 1413 1414 static noinline void check_create_range_2(struct xarray *xa, unsigned order) 1415 { 1416 unsigned long i; 1417 unsigned long nr = 1UL << order; 1418 1419 for (i = 0; i < nr * nr; i += nr) 1420 xa_store_many_order(xa, i, order); 1421 for (i = 0; i < nr * nr; i++) 1422 xa_erase_index(xa, i); 1423 XA_BUG_ON(xa, !xa_empty(xa)); 1424 } 1425 1426 static noinline void check_create_range_3(void) 1427 { 1428 XA_STATE(xas, NULL, 0); 1429 xas_set_err(&xas, -EEXIST); 1430 xas_create_range(&xas); 1431 XA_BUG_ON(NULL, xas_error(&xas) != -EEXIST); 1432 } 1433 1434 static noinline void check_create_range_4(struct xarray *xa, 1435 unsigned long index, unsigned order) 1436 { 1437 XA_STATE_ORDER(xas, xa, index, order); 1438 unsigned long base = xas.xa_index; 1439 unsigned long i = 0; 1440 1441 xa_store_index(xa, index, GFP_KERNEL); 1442 do { 1443 xas_lock(&xas); 1444 xas_create_range(&xas); 1445 if (xas_error(&xas)) 1446 goto unlock; 1447 for (i = 0; i < (1UL << order); i++) { 1448 void *old = xas_store(&xas, xa_mk_index(base + i)); 1449 if (xas.xa_index == index) 1450 XA_BUG_ON(xa, old != xa_mk_index(base + i)); 1451 else 1452 XA_BUG_ON(xa, old != NULL); 1453 xas_next(&xas); 1454 } 1455 unlock: 1456 xas_unlock(&xas); 1457 } while (xas_nomem(&xas, GFP_KERNEL)); 1458 1459 XA_BUG_ON(xa, xas_error(&xas)); 1460 1461 for (i = base; i < base + (1UL << order); i++) 1462 xa_erase_index(xa, i); 1463 XA_BUG_ON(xa, !xa_empty(xa)); 1464 } 1465 1466 static noinline void check_create_range(struct xarray *xa) 1467 { 1468 unsigned int order; 1469 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 12 : 1; 1470 1471 for (order = 0; order < max_order; order++) { 1472 check_create_range_1(xa, 0, order); 1473 check_create_range_1(xa, 1U << order, order); 1474 check_create_range_1(xa, 2U << order, order); 1475 check_create_range_1(xa, 3U << order, order); 1476 check_create_range_1(xa, 1U << 24, order); 1477 if (order < 10) 1478 check_create_range_2(xa, order); 1479 1480 check_create_range_4(xa, 0, order); 1481 check_create_range_4(xa, 1U << order, order); 1482 check_create_range_4(xa, 2U << order, order); 1483 check_create_range_4(xa, 3U << order, order); 1484 check_create_range_4(xa, 1U << 24, order); 1485 1486 check_create_range_4(xa, 1, order); 1487 check_create_range_4(xa, (1U << order) + 1, order); 1488 check_create_range_4(xa, (2U << order) + 1, order); 1489 check_create_range_4(xa, (2U << order) - 1, order); 1490 check_create_range_4(xa, (3U << order) + 1, order); 1491 check_create_range_4(xa, (3U << order) - 1, order); 1492 check_create_range_4(xa, (1U << 24) + 1, order); 1493 } 1494 1495 check_create_range_3(); 1496 } 1497 1498 static noinline void __check_store_range(struct xarray *xa, unsigned long first, 1499 unsigned long last) 1500 { 1501 #ifdef CONFIG_XARRAY_MULTI 1502 xa_store_range(xa, first, last, xa_mk_index(first), GFP_KERNEL); 1503 1504 XA_BUG_ON(xa, xa_load(xa, first) != xa_mk_index(first)); 1505 XA_BUG_ON(xa, xa_load(xa, last) != xa_mk_index(first)); 1506 XA_BUG_ON(xa, xa_load(xa, first - 1) != NULL); 1507 XA_BUG_ON(xa, xa_load(xa, last + 1) != NULL); 1508 1509 xa_store_range(xa, first, last, NULL, GFP_KERNEL); 1510 #endif 1511 1512 XA_BUG_ON(xa, !xa_empty(xa)); 1513 } 1514 1515 static noinline void check_store_range(struct xarray *xa) 1516 { 1517 unsigned long i, j; 1518 1519 for (i = 0; i < 128; i++) { 1520 for (j = i; j < 128; j++) { 1521 __check_store_range(xa, i, j); 1522 __check_store_range(xa, 128 + i, 128 + j); 1523 __check_store_range(xa, 4095 + i, 4095 + j); 1524 __check_store_range(xa, 4096 + i, 4096 + j); 1525 __check_store_range(xa, 123456 + i, 123456 + j); 1526 __check_store_range(xa, (1 << 24) + i, (1 << 24) + j); 1527 } 1528 } 1529 } 1530 1531 #ifdef CONFIG_XARRAY_MULTI 1532 static void check_split_1(struct xarray *xa, unsigned long index, 1533 unsigned int order) 1534 { 1535 XA_STATE(xas, xa, index); 1536 void *entry; 1537 unsigned int i = 0; 1538 1539 xa_store_order(xa, index, order, xa, GFP_KERNEL); 1540 1541 xas_split_alloc(&xas, xa, order, GFP_KERNEL); 1542 xas_lock(&xas); 1543 xas_split(&xas, xa, order); 1544 xas_unlock(&xas); 1545 1546 xa_for_each(xa, index, entry) { 1547 XA_BUG_ON(xa, entry != xa); 1548 i++; 1549 } 1550 XA_BUG_ON(xa, i != 1 << order); 1551 1552 xa_set_mark(xa, index, XA_MARK_0); 1553 XA_BUG_ON(xa, !xa_get_mark(xa, index, XA_MARK_0)); 1554 1555 xa_destroy(xa); 1556 } 1557 1558 static noinline void check_split(struct xarray *xa) 1559 { 1560 unsigned int order; 1561 1562 XA_BUG_ON(xa, !xa_empty(xa)); 1563 1564 for (order = 1; order < 2 * XA_CHUNK_SHIFT; order++) { 1565 check_split_1(xa, 0, order); 1566 check_split_1(xa, 1UL << order, order); 1567 check_split_1(xa, 3UL << order, order); 1568 } 1569 } 1570 #else 1571 static void check_split(struct xarray *xa) { } 1572 #endif 1573 1574 static void check_align_1(struct xarray *xa, char *name) 1575 { 1576 int i; 1577 unsigned int id; 1578 unsigned long index; 1579 void *entry; 1580 1581 for (i = 0; i < 8; i++) { 1582 XA_BUG_ON(xa, xa_alloc(xa, &id, name + i, xa_limit_32b, 1583 GFP_KERNEL) != 0); 1584 XA_BUG_ON(xa, id != i); 1585 } 1586 xa_for_each(xa, index, entry) 1587 XA_BUG_ON(xa, xa_is_err(entry)); 1588 xa_destroy(xa); 1589 } 1590 1591 /* 1592 * We should always be able to store without allocating memory after 1593 * reserving a slot. 1594 */ 1595 static void check_align_2(struct xarray *xa, char *name) 1596 { 1597 int i; 1598 1599 XA_BUG_ON(xa, !xa_empty(xa)); 1600 1601 for (i = 0; i < 8; i++) { 1602 XA_BUG_ON(xa, xa_store(xa, 0, name + i, GFP_KERNEL) != NULL); 1603 xa_erase(xa, 0); 1604 } 1605 1606 for (i = 0; i < 8; i++) { 1607 XA_BUG_ON(xa, xa_reserve(xa, 0, GFP_KERNEL) != 0); 1608 XA_BUG_ON(xa, xa_store(xa, 0, name + i, 0) != NULL); 1609 xa_erase(xa, 0); 1610 } 1611 1612 XA_BUG_ON(xa, !xa_empty(xa)); 1613 } 1614 1615 static noinline void check_align(struct xarray *xa) 1616 { 1617 char name[] = "Motorola 68000"; 1618 1619 check_align_1(xa, name); 1620 check_align_1(xa, name + 1); 1621 check_align_1(xa, name + 2); 1622 check_align_1(xa, name + 3); 1623 check_align_2(xa, name); 1624 } 1625 1626 static LIST_HEAD(shadow_nodes); 1627 1628 static void test_update_node(struct xa_node *node) 1629 { 1630 if (node->count && node->count == node->nr_values) { 1631 if (list_empty(&node->private_list)) 1632 list_add(&shadow_nodes, &node->private_list); 1633 } else { 1634 if (!list_empty(&node->private_list)) 1635 list_del_init(&node->private_list); 1636 } 1637 } 1638 1639 static noinline void shadow_remove(struct xarray *xa) 1640 { 1641 struct xa_node *node; 1642 1643 xa_lock(xa); 1644 while ((node = list_first_entry_or_null(&shadow_nodes, 1645 struct xa_node, private_list))) { 1646 XA_BUG_ON(xa, node->array != xa); 1647 list_del_init(&node->private_list); 1648 xa_delete_node(node, test_update_node); 1649 } 1650 xa_unlock(xa); 1651 } 1652 1653 static noinline void check_workingset(struct xarray *xa, unsigned long index) 1654 { 1655 XA_STATE(xas, xa, index); 1656 xas_set_update(&xas, test_update_node); 1657 1658 do { 1659 xas_lock(&xas); 1660 xas_store(&xas, xa_mk_value(0)); 1661 xas_next(&xas); 1662 xas_store(&xas, xa_mk_value(1)); 1663 xas_unlock(&xas); 1664 } while (xas_nomem(&xas, GFP_KERNEL)); 1665 1666 XA_BUG_ON(xa, list_empty(&shadow_nodes)); 1667 1668 xas_lock(&xas); 1669 xas_next(&xas); 1670 xas_store(&xas, &xas); 1671 XA_BUG_ON(xa, !list_empty(&shadow_nodes)); 1672 1673 xas_store(&xas, xa_mk_value(2)); 1674 xas_unlock(&xas); 1675 XA_BUG_ON(xa, list_empty(&shadow_nodes)); 1676 1677 shadow_remove(xa); 1678 XA_BUG_ON(xa, !list_empty(&shadow_nodes)); 1679 XA_BUG_ON(xa, !xa_empty(xa)); 1680 } 1681 1682 /* 1683 * Check that the pointer / value / sibling entries are accounted the 1684 * way we expect them to be. 1685 */ 1686 static noinline void check_account(struct xarray *xa) 1687 { 1688 #ifdef CONFIG_XARRAY_MULTI 1689 unsigned int order; 1690 1691 for (order = 1; order < 12; order++) { 1692 XA_STATE(xas, xa, 1 << order); 1693 1694 xa_store_order(xa, 0, order, xa, GFP_KERNEL); 1695 rcu_read_lock(); 1696 xas_load(&xas); 1697 XA_BUG_ON(xa, xas.xa_node->count == 0); 1698 XA_BUG_ON(xa, xas.xa_node->count > (1 << order)); 1699 XA_BUG_ON(xa, xas.xa_node->nr_values != 0); 1700 rcu_read_unlock(); 1701 1702 xa_store_order(xa, 1 << order, order, xa_mk_index(1UL << order), 1703 GFP_KERNEL); 1704 XA_BUG_ON(xa, xas.xa_node->count != xas.xa_node->nr_values * 2); 1705 1706 xa_erase(xa, 1 << order); 1707 XA_BUG_ON(xa, xas.xa_node->nr_values != 0); 1708 1709 xa_erase(xa, 0); 1710 XA_BUG_ON(xa, !xa_empty(xa)); 1711 } 1712 #endif 1713 } 1714 1715 static noinline void check_get_order(struct xarray *xa) 1716 { 1717 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 20 : 1; 1718 unsigned int order; 1719 unsigned long i, j; 1720 1721 for (i = 0; i < 3; i++) 1722 XA_BUG_ON(xa, xa_get_order(xa, i) != 0); 1723 1724 for (order = 0; order < max_order; order++) { 1725 for (i = 0; i < 10; i++) { 1726 xa_store_order(xa, i << order, order, 1727 xa_mk_index(i << order), GFP_KERNEL); 1728 for (j = i << order; j < (i + 1) << order; j++) 1729 XA_BUG_ON(xa, xa_get_order(xa, j) != order); 1730 xa_erase(xa, i << order); 1731 } 1732 } 1733 } 1734 1735 static noinline void check_destroy(struct xarray *xa) 1736 { 1737 unsigned long index; 1738 1739 XA_BUG_ON(xa, !xa_empty(xa)); 1740 1741 /* Destroying an empty array is a no-op */ 1742 xa_destroy(xa); 1743 XA_BUG_ON(xa, !xa_empty(xa)); 1744 1745 /* Destroying an array with a single entry */ 1746 for (index = 0; index < 1000; index++) { 1747 xa_store_index(xa, index, GFP_KERNEL); 1748 XA_BUG_ON(xa, xa_empty(xa)); 1749 xa_destroy(xa); 1750 XA_BUG_ON(xa, !xa_empty(xa)); 1751 } 1752 1753 /* Destroying an array with a single entry at ULONG_MAX */ 1754 xa_store(xa, ULONG_MAX, xa, GFP_KERNEL); 1755 XA_BUG_ON(xa, xa_empty(xa)); 1756 xa_destroy(xa); 1757 XA_BUG_ON(xa, !xa_empty(xa)); 1758 1759 #ifdef CONFIG_XARRAY_MULTI 1760 /* Destroying an array with a multi-index entry */ 1761 xa_store_order(xa, 1 << 11, 11, xa, GFP_KERNEL); 1762 XA_BUG_ON(xa, xa_empty(xa)); 1763 xa_destroy(xa); 1764 XA_BUG_ON(xa, !xa_empty(xa)); 1765 #endif 1766 } 1767 1768 static DEFINE_XARRAY(array); 1769 1770 static int xarray_checks(void) 1771 { 1772 check_xa_err(&array); 1773 check_xas_retry(&array); 1774 check_xa_load(&array); 1775 check_xa_mark(&array); 1776 check_xa_shrink(&array); 1777 check_xas_erase(&array); 1778 check_insert(&array); 1779 check_cmpxchg(&array); 1780 check_reserve(&array); 1781 check_reserve(&xa0); 1782 check_multi_store(&array); 1783 check_get_order(&array); 1784 check_xa_alloc(); 1785 check_find(&array); 1786 check_find_entry(&array); 1787 check_pause(&array); 1788 check_account(&array); 1789 check_destroy(&array); 1790 check_move(&array); 1791 check_create_range(&array); 1792 check_store_range(&array); 1793 check_store_iter(&array); 1794 check_align(&xa0); 1795 check_split(&array); 1796 1797 check_workingset(&array, 0); 1798 check_workingset(&array, 64); 1799 check_workingset(&array, 4096); 1800 1801 printk("XArray: %u of %u tests passed\n", tests_passed, tests_run); 1802 return (tests_run == tests_passed) ? 0 : -EINVAL; 1803 } 1804 1805 static void xarray_exit(void) 1806 { 1807 } 1808 1809 module_init(xarray_checks); 1810 module_exit(xarray_exit); 1811 MODULE_AUTHOR("Matthew Wilcox <willy@infradead.org>"); 1812 MODULE_LICENSE("GPL"); 1813