1 // SPDX-License-Identifier: GPL-2.0+ 1 // SPDX-License-Identifier: GPL-2.0+
2 /* 2 /*
3 * test_xarray.c: Test the XArray API 3 * test_xarray.c: Test the XArray API
4 * Copyright (c) 2017-2018 Microsoft Corporati 4 * Copyright (c) 2017-2018 Microsoft Corporation
5 * Copyright (c) 2019-2020 Oracle 5 * Copyright (c) 2019-2020 Oracle
6 * Author: Matthew Wilcox <willy@infradead.org 6 * Author: Matthew Wilcox <willy@infradead.org>
7 */ 7 */
8 8
9 #include <linux/xarray.h> 9 #include <linux/xarray.h>
10 #include <linux/module.h> 10 #include <linux/module.h>
11 11
12 static unsigned int tests_run; 12 static unsigned int tests_run;
13 static unsigned int tests_passed; 13 static unsigned int tests_passed;
14 14
15 static const unsigned int order_limit = 15 static const unsigned int order_limit =
16 IS_ENABLED(CONFIG_XARRAY_MULTI 16 IS_ENABLED(CONFIG_XARRAY_MULTI) ? BITS_PER_LONG : 1;
17 17
18 #ifndef XA_DEBUG 18 #ifndef XA_DEBUG
19 # ifdef __KERNEL__ 19 # ifdef __KERNEL__
20 void xa_dump(const struct xarray *xa) { } 20 void xa_dump(const struct xarray *xa) { }
21 # endif 21 # endif
22 #undef XA_BUG_ON 22 #undef XA_BUG_ON
23 #define XA_BUG_ON(xa, x) do { 23 #define XA_BUG_ON(xa, x) do { \
24 tests_run++; 24 tests_run++; \
25 if (x) { 25 if (x) { \
26 printk("BUG at %s:%d\n", __fun 26 printk("BUG at %s:%d\n", __func__, __LINE__); \
27 xa_dump(xa); 27 xa_dump(xa); \
28 dump_stack(); 28 dump_stack(); \
29 } else { 29 } else { \
30 tests_passed++; 30 tests_passed++; \
31 } 31 } \
32 } while (0) 32 } while (0)
33 #endif 33 #endif
34 34
35 static void *xa_mk_index(unsigned long index) 35 static void *xa_mk_index(unsigned long index)
36 { 36 {
37 return xa_mk_value(index & LONG_MAX); 37 return xa_mk_value(index & LONG_MAX);
38 } 38 }
39 39
40 static void *xa_store_index(struct xarray *xa, 40 static void *xa_store_index(struct xarray *xa, unsigned long index, gfp_t gfp)
41 { 41 {
42 return xa_store(xa, index, xa_mk_index 42 return xa_store(xa, index, xa_mk_index(index), gfp);
43 } 43 }
44 44
45 static void xa_insert_index(struct xarray *xa, 45 static void xa_insert_index(struct xarray *xa, unsigned long index)
46 { 46 {
47 XA_BUG_ON(xa, xa_insert(xa, index, xa_ 47 XA_BUG_ON(xa, xa_insert(xa, index, xa_mk_index(index),
48 GFP_KERNEL) != 48 GFP_KERNEL) != 0);
49 } 49 }
50 50
51 static void xa_alloc_index(struct xarray *xa, 51 static void xa_alloc_index(struct xarray *xa, unsigned long index, gfp_t gfp)
52 { 52 {
53 u32 id; 53 u32 id;
54 54
55 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_ 55 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(index), xa_limit_32b,
56 gfp) != 0); 56 gfp) != 0);
57 XA_BUG_ON(xa, id != index); 57 XA_BUG_ON(xa, id != index);
58 } 58 }
59 59
60 static void xa_erase_index(struct xarray *xa, 60 static void xa_erase_index(struct xarray *xa, unsigned long index)
61 { 61 {
62 XA_BUG_ON(xa, xa_erase(xa, index) != x 62 XA_BUG_ON(xa, xa_erase(xa, index) != xa_mk_index(index));
63 XA_BUG_ON(xa, xa_load(xa, index) != NU 63 XA_BUG_ON(xa, xa_load(xa, index) != NULL);
64 } 64 }
65 65
66 /* 66 /*
67 * If anyone needs this, please move it to xar 67 * If anyone needs this, please move it to xarray.c. We have no current
68 * users outside the test suite because all cu 68 * users outside the test suite because all current multislot users want
69 * to use the advanced API. 69 * to use the advanced API.
70 */ 70 */
71 static void *xa_store_order(struct xarray *xa, 71 static void *xa_store_order(struct xarray *xa, unsigned long index,
72 unsigned order, void *entry, g 72 unsigned order, void *entry, gfp_t gfp)
73 { 73 {
74 XA_STATE_ORDER(xas, xa, index, order); 74 XA_STATE_ORDER(xas, xa, index, order);
75 void *curr; 75 void *curr;
76 76
77 do { 77 do {
78 xas_lock(&xas); 78 xas_lock(&xas);
79 curr = xas_store(&xas, entry); 79 curr = xas_store(&xas, entry);
80 xas_unlock(&xas); 80 xas_unlock(&xas);
81 } while (xas_nomem(&xas, gfp)); 81 } while (xas_nomem(&xas, gfp));
82 82
83 return curr; 83 return curr;
84 } 84 }
85 85
86 static noinline void check_xa_err(struct xarra 86 static noinline void check_xa_err(struct xarray *xa)
87 { 87 {
88 XA_BUG_ON(xa, xa_err(xa_store_index(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)) 89 XA_BUG_ON(xa, xa_err(xa_erase(xa, 0)) != 0);
90 #ifndef __KERNEL__ 90 #ifndef __KERNEL__
91 /* The kernel does not fail GFP_NOWAIT 91 /* The kernel does not fail GFP_NOWAIT allocations */
92 XA_BUG_ON(xa, xa_err(xa_store_index(xa 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 93 XA_BUG_ON(xa, xa_err(xa_store_index(xa, 1, GFP_NOWAIT)) != -ENOMEM);
94 #endif 94 #endif
95 XA_BUG_ON(xa, xa_err(xa_store_index(xa 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, x 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)) 97 XA_BUG_ON(xa, xa_err(xa_erase(xa, 1)) != 0);
98 // kills the test-suite :-( 98 // kills the test-suite :-(
99 // XA_BUG_ON(xa, xa_err(xa_store(xa, 0, x 99 // XA_BUG_ON(xa, xa_err(xa_store(xa, 0, xa_mk_internal(0), 0)) != -EINVAL);
100 } 100 }
101 101
102 static noinline void check_xas_retry(struct xa 102 static noinline void check_xas_retry(struct xarray *xa)
103 { 103 {
104 XA_STATE(xas, xa, 0); 104 XA_STATE(xas, xa, 0);
105 void *entry; 105 void *entry;
106 106
107 xa_store_index(xa, 0, GFP_KERNEL); 107 xa_store_index(xa, 0, GFP_KERNEL);
108 xa_store_index(xa, 1, GFP_KERNEL); 108 xa_store_index(xa, 1, GFP_KERNEL);
109 109
110 rcu_read_lock(); 110 rcu_read_lock();
111 XA_BUG_ON(xa, xas_find(&xas, ULONG_MAX 111 XA_BUG_ON(xa, xas_find(&xas, ULONG_MAX) != xa_mk_value(0));
112 xa_erase_index(xa, 1); 112 xa_erase_index(xa, 1);
113 XA_BUG_ON(xa, !xa_is_retry(xas_reload( 113 XA_BUG_ON(xa, !xa_is_retry(xas_reload(&xas)));
114 XA_BUG_ON(xa, xas_retry(&xas, NULL)); 114 XA_BUG_ON(xa, xas_retry(&xas, NULL));
115 XA_BUG_ON(xa, xas_retry(&xas, xa_mk_va 115 XA_BUG_ON(xa, xas_retry(&xas, xa_mk_value(0)));
116 xas_reset(&xas); 116 xas_reset(&xas);
117 XA_BUG_ON(xa, xas.xa_node != XAS_RESTA 117 XA_BUG_ON(xa, xas.xa_node != XAS_RESTART);
118 XA_BUG_ON(xa, xas_next_entry(&xas, ULO 118 XA_BUG_ON(xa, xas_next_entry(&xas, ULONG_MAX) != xa_mk_value(0));
119 XA_BUG_ON(xa, xas.xa_node != NULL); 119 XA_BUG_ON(xa, xas.xa_node != NULL);
120 rcu_read_unlock(); 120 rcu_read_unlock();
121 121
122 XA_BUG_ON(xa, xa_store_index(xa, 1, GF 122 XA_BUG_ON(xa, xa_store_index(xa, 1, GFP_KERNEL) != NULL);
123 123
124 rcu_read_lock(); 124 rcu_read_lock();
125 XA_BUG_ON(xa, !xa_is_internal(xas_relo 125 XA_BUG_ON(xa, !xa_is_internal(xas_reload(&xas)));
126 xas.xa_node = XAS_RESTART; 126 xas.xa_node = XAS_RESTART;
127 XA_BUG_ON(xa, xas_next_entry(&xas, ULO 127 XA_BUG_ON(xa, xas_next_entry(&xas, ULONG_MAX) != xa_mk_value(0));
128 rcu_read_unlock(); 128 rcu_read_unlock();
129 129
130 /* Make sure we can iterate through re 130 /* Make sure we can iterate through retry entries */
131 xas_lock(&xas); 131 xas_lock(&xas);
132 xas_set(&xas, 0); 132 xas_set(&xas, 0);
133 xas_store(&xas, XA_RETRY_ENTRY); 133 xas_store(&xas, XA_RETRY_ENTRY);
134 xas_set(&xas, 1); 134 xas_set(&xas, 1);
135 xas_store(&xas, XA_RETRY_ENTRY); 135 xas_store(&xas, XA_RETRY_ENTRY);
136 136
137 xas_set(&xas, 0); 137 xas_set(&xas, 0);
138 xas_for_each(&xas, entry, ULONG_MAX) { 138 xas_for_each(&xas, entry, ULONG_MAX) {
139 xas_store(&xas, xa_mk_index(xa 139 xas_store(&xas, xa_mk_index(xas.xa_index));
140 } 140 }
141 xas_unlock(&xas); 141 xas_unlock(&xas);
142 142
143 xa_erase_index(xa, 0); 143 xa_erase_index(xa, 0);
144 xa_erase_index(xa, 1); 144 xa_erase_index(xa, 1);
145 } 145 }
146 146
147 static noinline void check_xa_load(struct xarr 147 static noinline void check_xa_load(struct xarray *xa)
148 { 148 {
149 unsigned long i, j; 149 unsigned long i, j;
150 150
151 for (i = 0; i < 1024; i++) { 151 for (i = 0; i < 1024; i++) {
152 for (j = 0; j < 1024; j++) { 152 for (j = 0; j < 1024; j++) {
153 void *entry = xa_load( 153 void *entry = xa_load(xa, j);
154 if (j < i) 154 if (j < i)
155 XA_BUG_ON(xa, 155 XA_BUG_ON(xa, xa_to_value(entry) != j);
156 else 156 else
157 XA_BUG_ON(xa, 157 XA_BUG_ON(xa, entry);
158 } 158 }
159 XA_BUG_ON(xa, xa_store_index(x 159 XA_BUG_ON(xa, xa_store_index(xa, i, GFP_KERNEL) != NULL);
160 } 160 }
161 161
162 for (i = 0; i < 1024; i++) { 162 for (i = 0; i < 1024; i++) {
163 for (j = 0; j < 1024; j++) { 163 for (j = 0; j < 1024; j++) {
164 void *entry = xa_load( 164 void *entry = xa_load(xa, j);
165 if (j >= i) 165 if (j >= i)
166 XA_BUG_ON(xa, 166 XA_BUG_ON(xa, xa_to_value(entry) != j);
167 else 167 else
168 XA_BUG_ON(xa, 168 XA_BUG_ON(xa, entry);
169 } 169 }
170 xa_erase_index(xa, i); 170 xa_erase_index(xa, i);
171 } 171 }
172 XA_BUG_ON(xa, !xa_empty(xa)); 172 XA_BUG_ON(xa, !xa_empty(xa));
173 } 173 }
174 174
175 static noinline void check_xa_mark_1(struct xa 175 static noinline void check_xa_mark_1(struct xarray *xa, unsigned long index)
176 { 176 {
177 unsigned int order; 177 unsigned int order;
178 unsigned int max_order = IS_ENABLED(CO 178 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 8 : 1;
179 179
180 /* NULL elements have no marks set */ 180 /* NULL elements have no marks set */
181 XA_BUG_ON(xa, xa_get_mark(xa, index, X 181 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
182 xa_set_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, X 183 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
184 184
185 /* Storing a pointer will not make a m 185 /* Storing a pointer will not make a mark appear */
186 XA_BUG_ON(xa, xa_store_index(xa, index 186 XA_BUG_ON(xa, xa_store_index(xa, index, GFP_KERNEL) != NULL);
187 XA_BUG_ON(xa, xa_get_mark(xa, index, X 187 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
188 xa_set_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, 189 XA_BUG_ON(xa, !xa_get_mark(xa, index, XA_MARK_0));
190 190
191 /* Setting one mark will not set anoth 191 /* Setting one mark will not set another mark */
192 XA_BUG_ON(xa, xa_get_mark(xa, index + 192 XA_BUG_ON(xa, xa_get_mark(xa, index + 1, XA_MARK_0));
193 XA_BUG_ON(xa, xa_get_mark(xa, index, X 193 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_1));
194 194
195 /* Storing NULL clears marks, and they 195 /* Storing NULL clears marks, and they can't be set again */
196 xa_erase_index(xa, index); 196 xa_erase_index(xa, index);
197 XA_BUG_ON(xa, !xa_empty(xa)); 197 XA_BUG_ON(xa, !xa_empty(xa));
198 XA_BUG_ON(xa, xa_get_mark(xa, index, X 198 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
199 xa_set_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, X 200 XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
201 201
202 /* 202 /*
203 * Storing a multi-index entry over en 203 * Storing a multi-index entry over entries with marks gives the
204 * entire entry the union of the marks 204 * entire entry the union of the marks
205 */ 205 */
206 BUG_ON((index % 4) != 0); 206 BUG_ON((index % 4) != 0);
207 for (order = 2; order < max_order; ord 207 for (order = 2; order < max_order; order++) {
208 unsigned long base = round_dow 208 unsigned long base = round_down(index, 1UL << order);
209 unsigned long next = base + (1 209 unsigned long next = base + (1UL << order);
210 unsigned long i; 210 unsigned long i;
211 211
212 XA_BUG_ON(xa, xa_store_index(x 212 XA_BUG_ON(xa, xa_store_index(xa, index + 1, GFP_KERNEL));
213 xa_set_mark(xa, index + 1, XA_ 213 xa_set_mark(xa, index + 1, XA_MARK_0);
214 XA_BUG_ON(xa, xa_store_index(x 214 XA_BUG_ON(xa, xa_store_index(xa, index + 2, GFP_KERNEL));
215 xa_set_mark(xa, index + 2, XA_ 215 xa_set_mark(xa, index + 2, XA_MARK_2);
216 XA_BUG_ON(xa, xa_store_index(x 216 XA_BUG_ON(xa, xa_store_index(xa, next, GFP_KERNEL));
217 xa_store_order(xa, index, orde 217 xa_store_order(xa, index, order, xa_mk_index(index),
218 GFP_KERNEL); 218 GFP_KERNEL);
219 for (i = base; i < next; i++) 219 for (i = base; i < next; i++) {
220 XA_STATE(xas, xa, i); 220 XA_STATE(xas, xa, i);
221 unsigned int seen = 0; 221 unsigned int seen = 0;
222 void *entry; 222 void *entry;
223 223
224 XA_BUG_ON(xa, !xa_get_ 224 XA_BUG_ON(xa, !xa_get_mark(xa, i, XA_MARK_0));
225 XA_BUG_ON(xa, xa_get_m 225 XA_BUG_ON(xa, xa_get_mark(xa, i, XA_MARK_1));
226 XA_BUG_ON(xa, !xa_get_ 226 XA_BUG_ON(xa, !xa_get_mark(xa, i, XA_MARK_2));
227 227
228 /* We should see two e 228 /* We should see two elements in the array */
229 rcu_read_lock(); 229 rcu_read_lock();
230 xas_for_each(&xas, ent 230 xas_for_each(&xas, entry, ULONG_MAX)
231 seen++; 231 seen++;
232 rcu_read_unlock(); 232 rcu_read_unlock();
233 XA_BUG_ON(xa, seen != 233 XA_BUG_ON(xa, seen != 2);
234 234
235 /* One of which is mar 235 /* One of which is marked */
236 xas_set(&xas, 0); 236 xas_set(&xas, 0);
237 seen = 0; 237 seen = 0;
238 rcu_read_lock(); 238 rcu_read_lock();
239 xas_for_each_marked(&x 239 xas_for_each_marked(&xas, entry, ULONG_MAX, XA_MARK_0)
240 seen++; 240 seen++;
241 rcu_read_unlock(); 241 rcu_read_unlock();
242 XA_BUG_ON(xa, seen != 242 XA_BUG_ON(xa, seen != 1);
243 } 243 }
244 XA_BUG_ON(xa, xa_get_mark(xa, 244 XA_BUG_ON(xa, xa_get_mark(xa, next, XA_MARK_0));
245 XA_BUG_ON(xa, xa_get_mark(xa, 245 XA_BUG_ON(xa, xa_get_mark(xa, next, XA_MARK_1));
246 XA_BUG_ON(xa, xa_get_mark(xa, 246 XA_BUG_ON(xa, xa_get_mark(xa, next, XA_MARK_2));
247 xa_erase_index(xa, index); 247 xa_erase_index(xa, index);
248 xa_erase_index(xa, next); 248 xa_erase_index(xa, next);
249 XA_BUG_ON(xa, !xa_empty(xa)); 249 XA_BUG_ON(xa, !xa_empty(xa));
250 } 250 }
251 XA_BUG_ON(xa, !xa_empty(xa)); 251 XA_BUG_ON(xa, !xa_empty(xa));
252 } 252 }
253 253
254 static noinline void check_xa_mark_2(struct xa 254 static noinline void check_xa_mark_2(struct xarray *xa)
255 { 255 {
256 XA_STATE(xas, xa, 0); 256 XA_STATE(xas, xa, 0);
257 unsigned long index; 257 unsigned long index;
258 unsigned int count = 0; 258 unsigned int count = 0;
259 void *entry; 259 void *entry;
260 260
261 xa_store_index(xa, 0, GFP_KERNEL); 261 xa_store_index(xa, 0, GFP_KERNEL);
262 xa_set_mark(xa, 0, XA_MARK_0); 262 xa_set_mark(xa, 0, XA_MARK_0);
263 xas_lock(&xas); 263 xas_lock(&xas);
264 xas_load(&xas); 264 xas_load(&xas);
265 xas_init_marks(&xas); 265 xas_init_marks(&xas);
266 xas_unlock(&xas); 266 xas_unlock(&xas);
267 XA_BUG_ON(xa, !xa_get_mark(xa, 0, XA_M 267 XA_BUG_ON(xa, !xa_get_mark(xa, 0, XA_MARK_0) == 0);
268 268
269 for (index = 3500; index < 4500; index 269 for (index = 3500; index < 4500; index++) {
270 xa_store_index(xa, index, GFP_ 270 xa_store_index(xa, index, GFP_KERNEL);
271 xa_set_mark(xa, index, XA_MARK 271 xa_set_mark(xa, index, XA_MARK_0);
272 } 272 }
273 273
274 xas_reset(&xas); 274 xas_reset(&xas);
275 rcu_read_lock(); 275 rcu_read_lock();
276 xas_for_each_marked(&xas, entry, ULONG 276 xas_for_each_marked(&xas, entry, ULONG_MAX, XA_MARK_0)
277 count++; 277 count++;
278 rcu_read_unlock(); 278 rcu_read_unlock();
279 XA_BUG_ON(xa, count != 1000); 279 XA_BUG_ON(xa, count != 1000);
280 280
281 xas_lock(&xas); 281 xas_lock(&xas);
282 xas_for_each(&xas, entry, ULONG_MAX) { 282 xas_for_each(&xas, entry, ULONG_MAX) {
283 xas_init_marks(&xas); 283 xas_init_marks(&xas);
284 XA_BUG_ON(xa, !xa_get_mark(xa, 284 XA_BUG_ON(xa, !xa_get_mark(xa, xas.xa_index, XA_MARK_0));
285 XA_BUG_ON(xa, !xas_get_mark(&x 285 XA_BUG_ON(xa, !xas_get_mark(&xas, XA_MARK_0));
286 } 286 }
287 xas_unlock(&xas); 287 xas_unlock(&xas);
288 288
289 xa_destroy(xa); 289 xa_destroy(xa);
290 } 290 }
291 291
292 static noinline void check_xa_mark_3(struct xa 292 static noinline void check_xa_mark_3(struct xarray *xa)
293 { 293 {
294 #ifdef CONFIG_XARRAY_MULTI 294 #ifdef CONFIG_XARRAY_MULTI
295 XA_STATE(xas, xa, 0x41); 295 XA_STATE(xas, xa, 0x41);
296 void *entry; 296 void *entry;
297 int count = 0; 297 int count = 0;
298 298
299 xa_store_order(xa, 0x40, 2, xa_mk_inde 299 xa_store_order(xa, 0x40, 2, xa_mk_index(0x40), GFP_KERNEL);
300 xa_set_mark(xa, 0x41, XA_MARK_0); 300 xa_set_mark(xa, 0x41, XA_MARK_0);
301 301
302 rcu_read_lock(); 302 rcu_read_lock();
303 xas_for_each_marked(&xas, entry, ULONG 303 xas_for_each_marked(&xas, entry, ULONG_MAX, XA_MARK_0) {
304 count++; 304 count++;
305 XA_BUG_ON(xa, entry != xa_mk_i 305 XA_BUG_ON(xa, entry != xa_mk_index(0x40));
306 } 306 }
307 XA_BUG_ON(xa, count != 1); 307 XA_BUG_ON(xa, count != 1);
308 rcu_read_unlock(); 308 rcu_read_unlock();
309 xa_destroy(xa); 309 xa_destroy(xa);
310 #endif 310 #endif
311 } 311 }
312 312
313 static noinline void check_xa_mark(struct xarr 313 static noinline void check_xa_mark(struct xarray *xa)
314 { 314 {
315 unsigned long index; 315 unsigned long index;
316 316
317 for (index = 0; index < 16384; index + 317 for (index = 0; index < 16384; index += 4)
318 check_xa_mark_1(xa, index); 318 check_xa_mark_1(xa, index);
319 319
320 check_xa_mark_2(xa); 320 check_xa_mark_2(xa);
321 check_xa_mark_3(xa); 321 check_xa_mark_3(xa);
322 } 322 }
323 323
324 static noinline void check_xa_shrink(struct xa 324 static noinline void check_xa_shrink(struct xarray *xa)
325 { 325 {
326 XA_STATE(xas, xa, 1); 326 XA_STATE(xas, xa, 1);
327 struct xa_node *node; 327 struct xa_node *node;
328 unsigned int order; 328 unsigned int order;
329 unsigned int max_order = IS_ENABLED(CO 329 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 15 : 1;
330 330
331 XA_BUG_ON(xa, !xa_empty(xa)); 331 XA_BUG_ON(xa, !xa_empty(xa));
332 XA_BUG_ON(xa, xa_store_index(xa, 0, GF 332 XA_BUG_ON(xa, xa_store_index(xa, 0, GFP_KERNEL) != NULL);
333 XA_BUG_ON(xa, xa_store_index(xa, 1, GF 333 XA_BUG_ON(xa, xa_store_index(xa, 1, GFP_KERNEL) != NULL);
334 334
335 /* 335 /*
336 * Check that erasing the entry at 1 s 336 * Check that erasing the entry at 1 shrinks the tree and properly
337 * marks the node as being deleted. 337 * marks the node as being deleted.
338 */ 338 */
339 xas_lock(&xas); 339 xas_lock(&xas);
340 XA_BUG_ON(xa, xas_load(&xas) != xa_mk_ 340 XA_BUG_ON(xa, xas_load(&xas) != xa_mk_value(1));
341 node = xas.xa_node; 341 node = xas.xa_node;
342 XA_BUG_ON(xa, xa_entry_locked(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) != 343 XA_BUG_ON(xa, xas_store(&xas, NULL) != xa_mk_value(1));
344 XA_BUG_ON(xa, xa_load(xa, 1) != NULL); 344 XA_BUG_ON(xa, xa_load(xa, 1) != NULL);
345 XA_BUG_ON(xa, xas.xa_node != XAS_BOUND 345 XA_BUG_ON(xa, xas.xa_node != XAS_BOUNDS);
346 XA_BUG_ON(xa, xa_entry_locked(xa, node 346 XA_BUG_ON(xa, xa_entry_locked(xa, node, 0) != XA_RETRY_ENTRY);
347 XA_BUG_ON(xa, xas_load(&xas) != NULL); 347 XA_BUG_ON(xa, xas_load(&xas) != NULL);
348 xas_unlock(&xas); 348 xas_unlock(&xas);
349 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_ 349 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(0));
350 xa_erase_index(xa, 0); 350 xa_erase_index(xa, 0);
351 XA_BUG_ON(xa, !xa_empty(xa)); 351 XA_BUG_ON(xa, !xa_empty(xa));
352 352
353 for (order = 0; order < max_order; ord 353 for (order = 0; order < max_order; order++) {
354 unsigned long max = (1UL << or 354 unsigned long max = (1UL << order) - 1;
355 xa_store_order(xa, 0, order, x 355 xa_store_order(xa, 0, order, xa_mk_value(0), GFP_KERNEL);
356 XA_BUG_ON(xa, xa_load(xa, max) 356 XA_BUG_ON(xa, xa_load(xa, max) != xa_mk_value(0));
357 XA_BUG_ON(xa, xa_load(xa, max 357 XA_BUG_ON(xa, xa_load(xa, max + 1) != NULL);
358 rcu_read_lock(); 358 rcu_read_lock();
359 node = xa_head(xa); 359 node = xa_head(xa);
360 rcu_read_unlock(); 360 rcu_read_unlock();
361 XA_BUG_ON(xa, xa_store_index(x 361 XA_BUG_ON(xa, xa_store_index(xa, ULONG_MAX, GFP_KERNEL) !=
362 NULL); 362 NULL);
363 rcu_read_lock(); 363 rcu_read_lock();
364 XA_BUG_ON(xa, xa_head(xa) == n 364 XA_BUG_ON(xa, xa_head(xa) == node);
365 rcu_read_unlock(); 365 rcu_read_unlock();
366 XA_BUG_ON(xa, xa_load(xa, max 366 XA_BUG_ON(xa, xa_load(xa, max + 1) != NULL);
367 xa_erase_index(xa, ULONG_MAX); 367 xa_erase_index(xa, ULONG_MAX);
368 XA_BUG_ON(xa, xa->xa_head != n 368 XA_BUG_ON(xa, xa->xa_head != node);
369 xa_erase_index(xa, 0); 369 xa_erase_index(xa, 0);
370 } 370 }
371 } 371 }
372 372
373 static noinline void check_insert(struct xarra 373 static noinline void check_insert(struct xarray *xa)
374 { 374 {
375 unsigned long i; 375 unsigned long i;
376 376
377 for (i = 0; i < 1024; i++) { 377 for (i = 0; i < 1024; i++) {
378 xa_insert_index(xa, i); 378 xa_insert_index(xa, i);
379 XA_BUG_ON(xa, xa_load(xa, i - 379 XA_BUG_ON(xa, xa_load(xa, i - 1) != NULL);
380 XA_BUG_ON(xa, xa_load(xa, i + 380 XA_BUG_ON(xa, xa_load(xa, i + 1) != NULL);
381 xa_erase_index(xa, i); 381 xa_erase_index(xa, i);
382 } 382 }
383 383
384 for (i = 10; i < BITS_PER_LONG; i++) { 384 for (i = 10; i < BITS_PER_LONG; i++) {
385 xa_insert_index(xa, 1UL << i); 385 xa_insert_index(xa, 1UL << i);
386 XA_BUG_ON(xa, xa_load(xa, (1UL 386 XA_BUG_ON(xa, xa_load(xa, (1UL << i) - 1) != NULL);
387 XA_BUG_ON(xa, xa_load(xa, (1UL 387 XA_BUG_ON(xa, xa_load(xa, (1UL << i) + 1) != NULL);
388 xa_erase_index(xa, 1UL << i); 388 xa_erase_index(xa, 1UL << i);
389 389
390 xa_insert_index(xa, (1UL << i) 390 xa_insert_index(xa, (1UL << i) - 1);
391 XA_BUG_ON(xa, xa_load(xa, (1UL 391 XA_BUG_ON(xa, xa_load(xa, (1UL << i) - 2) != NULL);
392 XA_BUG_ON(xa, xa_load(xa, 1UL 392 XA_BUG_ON(xa, xa_load(xa, 1UL << i) != NULL);
393 xa_erase_index(xa, (1UL << i) 393 xa_erase_index(xa, (1UL << i) - 1);
394 } 394 }
395 395
396 xa_insert_index(xa, ~0UL); 396 xa_insert_index(xa, ~0UL);
397 XA_BUG_ON(xa, xa_load(xa, 0UL) != NULL 397 XA_BUG_ON(xa, xa_load(xa, 0UL) != NULL);
398 XA_BUG_ON(xa, xa_load(xa, ~1UL) != NUL 398 XA_BUG_ON(xa, xa_load(xa, ~1UL) != NULL);
399 xa_erase_index(xa, ~0UL); 399 xa_erase_index(xa, ~0UL);
400 400
401 XA_BUG_ON(xa, !xa_empty(xa)); 401 XA_BUG_ON(xa, !xa_empty(xa));
402 } 402 }
403 403
404 static noinline void check_cmpxchg(struct xarr 404 static noinline void check_cmpxchg(struct xarray *xa)
405 { 405 {
406 void *FIVE = xa_mk_value(5); 406 void *FIVE = xa_mk_value(5);
407 void *SIX = xa_mk_value(6); 407 void *SIX = xa_mk_value(6);
408 void *LOTS = xa_mk_value(12345678); 408 void *LOTS = xa_mk_value(12345678);
409 409
410 XA_BUG_ON(xa, !xa_empty(xa)); 410 XA_BUG_ON(xa, !xa_empty(xa));
411 XA_BUG_ON(xa, xa_store_index(xa, 12345 411 XA_BUG_ON(xa, xa_store_index(xa, 12345678, GFP_KERNEL) != NULL);
412 XA_BUG_ON(xa, xa_insert(xa, 12345678, 412 XA_BUG_ON(xa, xa_insert(xa, 12345678, xa, GFP_KERNEL) != -EBUSY);
413 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, 413 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, SIX, FIVE, GFP_KERNEL) != LOTS);
414 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, 414 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, LOTS, FIVE, GFP_KERNEL) != LOTS);
415 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, 415 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, FIVE, LOTS, GFP_KERNEL) != FIVE);
416 XA_BUG_ON(xa, xa_cmpxchg(xa, 5, 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, 417 XA_BUG_ON(xa, xa_cmpxchg(xa, 5, NULL, FIVE, GFP_KERNEL) != NULL);
418 XA_BUG_ON(xa, xa_insert(xa, 5, FIVE, G 418 XA_BUG_ON(xa, xa_insert(xa, 5, FIVE, GFP_KERNEL) != -EBUSY);
419 XA_BUG_ON(xa, xa_cmpxchg(xa, 5, FIVE, 419 XA_BUG_ON(xa, xa_cmpxchg(xa, 5, FIVE, NULL, GFP_KERNEL) != FIVE);
420 XA_BUG_ON(xa, xa_insert(xa, 5, FIVE, G 420 XA_BUG_ON(xa, xa_insert(xa, 5, FIVE, GFP_KERNEL) == -EBUSY);
421 xa_erase_index(xa, 12345678); 421 xa_erase_index(xa, 12345678);
422 xa_erase_index(xa, 5); 422 xa_erase_index(xa, 5);
423 XA_BUG_ON(xa, !xa_empty(xa)); 423 XA_BUG_ON(xa, !xa_empty(xa));
424 } 424 }
425 425
426 static noinline void check_cmpxchg_order(struc 426 static noinline void check_cmpxchg_order(struct xarray *xa)
427 { 427 {
428 #ifdef CONFIG_XARRAY_MULTI 428 #ifdef CONFIG_XARRAY_MULTI
429 void *FIVE = xa_mk_value(5); 429 void *FIVE = xa_mk_value(5);
430 unsigned int i, order = 3; 430 unsigned int i, order = 3;
431 431
432 XA_BUG_ON(xa, xa_store_order(xa, 0, or 432 XA_BUG_ON(xa, xa_store_order(xa, 0, order, FIVE, GFP_KERNEL));
433 433
434 /* Check entry FIVE has the order save 434 /* Check entry FIVE has the order saved */
435 XA_BUG_ON(xa, xa_get_order(xa, xa_to_v 435 XA_BUG_ON(xa, xa_get_order(xa, xa_to_value(FIVE)) != order);
436 436
437 /* Check all the tied indexes have the 437 /* Check all the tied indexes have the same entry and order */
438 for (i = 0; i < (1 << order); i++) { 438 for (i = 0; i < (1 << order); i++) {
439 XA_BUG_ON(xa, xa_load(xa, i) ! 439 XA_BUG_ON(xa, xa_load(xa, i) != FIVE);
440 XA_BUG_ON(xa, xa_get_order(xa, 440 XA_BUG_ON(xa, xa_get_order(xa, i) != order);
441 } 441 }
442 442
443 /* Ensure that nothing is stored at in 443 /* Ensure that nothing is stored at index '1 << order' */
444 XA_BUG_ON(xa, xa_load(xa, 1 << order) 444 XA_BUG_ON(xa, xa_load(xa, 1 << order) != NULL);
445 445
446 /* 446 /*
447 * Additionally, keep the node informa 447 * Additionally, keep the node information and the order at
448 * '1 << order' 448 * '1 << order'
449 */ 449 */
450 XA_BUG_ON(xa, xa_store_order(xa, 1 << 450 XA_BUG_ON(xa, xa_store_order(xa, 1 << order, order, FIVE, GFP_KERNEL));
451 for (i = (1 << order); i < (1 << order 451 for (i = (1 << order); i < (1 << order) + (1 << order) - 1; i++) {
452 XA_BUG_ON(xa, xa_load(xa, i) ! 452 XA_BUG_ON(xa, xa_load(xa, i) != FIVE);
453 XA_BUG_ON(xa, xa_get_order(xa, 453 XA_BUG_ON(xa, xa_get_order(xa, i) != order);
454 } 454 }
455 455
456 /* Conditionally replace FIVE entry at 456 /* Conditionally replace FIVE entry at index '' with NULL */
457 XA_BUG_ON(xa, xa_cmpxchg(xa, 0, FIVE, 457 XA_BUG_ON(xa, xa_cmpxchg(xa, 0, FIVE, NULL, GFP_KERNEL) != FIVE);
458 458
459 /* Verify the order is lost at FIVE (a 459 /* Verify the order is lost at FIVE (and old) entries */
460 XA_BUG_ON(xa, xa_get_order(xa, xa_to_v 460 XA_BUG_ON(xa, xa_get_order(xa, xa_to_value(FIVE)) != 0);
461 461
462 /* Verify the order and entries are lo 462 /* Verify the order and entries are lost in all the tied indexes */
463 for (i = 0; i < (1 << order); i++) { 463 for (i = 0; i < (1 << order); i++) {
464 XA_BUG_ON(xa, xa_load(xa, i) ! 464 XA_BUG_ON(xa, xa_load(xa, i) != NULL);
465 XA_BUG_ON(xa, xa_get_order(xa, 465 XA_BUG_ON(xa, xa_get_order(xa, i) != 0);
466 } 466 }
467 467
468 /* Verify node and order are kept at ' 468 /* Verify node and order are kept at '1 << order' */
469 for (i = (1 << order); i < (1 << order 469 for (i = (1 << order); i < (1 << order) + (1 << order) - 1; i++) {
470 XA_BUG_ON(xa, xa_load(xa, i) ! 470 XA_BUG_ON(xa, xa_load(xa, i) != FIVE);
471 XA_BUG_ON(xa, xa_get_order(xa, 471 XA_BUG_ON(xa, xa_get_order(xa, i) != order);
472 } 472 }
473 473
474 xa_store_order(xa, 0, BITS_PER_LONG - 474 xa_store_order(xa, 0, BITS_PER_LONG - 1, NULL, GFP_KERNEL);
475 XA_BUG_ON(xa, !xa_empty(xa)); 475 XA_BUG_ON(xa, !xa_empty(xa));
476 #endif 476 #endif
477 } 477 }
478 478
479 static noinline void check_reserve(struct xarr 479 static noinline void check_reserve(struct xarray *xa)
480 { 480 {
481 void *entry; 481 void *entry;
482 unsigned long index; 482 unsigned long index;
483 int count; 483 int count;
484 484
485 /* An array with a reserved entry is n 485 /* An array with a reserved entry is not empty */
486 XA_BUG_ON(xa, !xa_empty(xa)); 486 XA_BUG_ON(xa, !xa_empty(xa));
487 XA_BUG_ON(xa, xa_reserve(xa, 12345678, 487 XA_BUG_ON(xa, xa_reserve(xa, 12345678, GFP_KERNEL) != 0);
488 XA_BUG_ON(xa, xa_empty(xa)); 488 XA_BUG_ON(xa, xa_empty(xa));
489 XA_BUG_ON(xa, xa_load(xa, 12345678)); 489 XA_BUG_ON(xa, xa_load(xa, 12345678));
490 xa_release(xa, 12345678); 490 xa_release(xa, 12345678);
491 XA_BUG_ON(xa, !xa_empty(xa)); 491 XA_BUG_ON(xa, !xa_empty(xa));
492 492
493 /* Releasing a used entry does nothing 493 /* Releasing a used entry does nothing */
494 XA_BUG_ON(xa, xa_reserve(xa, 12345678, 494 XA_BUG_ON(xa, xa_reserve(xa, 12345678, GFP_KERNEL) != 0);
495 XA_BUG_ON(xa, xa_store_index(xa, 12345 495 XA_BUG_ON(xa, xa_store_index(xa, 12345678, GFP_NOWAIT) != NULL);
496 xa_release(xa, 12345678); 496 xa_release(xa, 12345678);
497 xa_erase_index(xa, 12345678); 497 xa_erase_index(xa, 12345678);
498 XA_BUG_ON(xa, !xa_empty(xa)); 498 XA_BUG_ON(xa, !xa_empty(xa));
499 499
500 /* cmpxchg sees a reserved entry as ZE 500 /* cmpxchg sees a reserved entry as ZERO */
501 XA_BUG_ON(xa, xa_reserve(xa, 12345678, 501 XA_BUG_ON(xa, xa_reserve(xa, 12345678, GFP_KERNEL) != 0);
502 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, 502 XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, XA_ZERO_ENTRY,
503 xa_mk_value(12 503 xa_mk_value(12345678), GFP_NOWAIT) != NULL);
504 xa_release(xa, 12345678); 504 xa_release(xa, 12345678);
505 xa_erase_index(xa, 12345678); 505 xa_erase_index(xa, 12345678);
506 XA_BUG_ON(xa, !xa_empty(xa)); 506 XA_BUG_ON(xa, !xa_empty(xa));
507 507
508 /* xa_insert treats it as busy */ 508 /* xa_insert treats it as busy */
509 XA_BUG_ON(xa, xa_reserve(xa, 12345678, 509 XA_BUG_ON(xa, xa_reserve(xa, 12345678, GFP_KERNEL) != 0);
510 XA_BUG_ON(xa, xa_insert(xa, 12345678, 510 XA_BUG_ON(xa, xa_insert(xa, 12345678, xa_mk_value(12345678), 0) !=
511 -EBUSY); 511 -EBUSY);
512 XA_BUG_ON(xa, xa_empty(xa)); 512 XA_BUG_ON(xa, xa_empty(xa));
513 XA_BUG_ON(xa, xa_erase(xa, 12345678) ! 513 XA_BUG_ON(xa, xa_erase(xa, 12345678) != NULL);
514 XA_BUG_ON(xa, !xa_empty(xa)); 514 XA_BUG_ON(xa, !xa_empty(xa));
515 515
516 /* Can iterate through a reserved entr 516 /* Can iterate through a reserved entry */
517 xa_store_index(xa, 5, GFP_KERNEL); 517 xa_store_index(xa, 5, GFP_KERNEL);
518 XA_BUG_ON(xa, xa_reserve(xa, 6, GFP_KE 518 XA_BUG_ON(xa, xa_reserve(xa, 6, GFP_KERNEL) != 0);
519 xa_store_index(xa, 7, GFP_KERNEL); 519 xa_store_index(xa, 7, GFP_KERNEL);
520 520
521 count = 0; 521 count = 0;
522 xa_for_each(xa, index, entry) { 522 xa_for_each(xa, index, entry) {
523 XA_BUG_ON(xa, index != 5 && in 523 XA_BUG_ON(xa, index != 5 && index != 7);
524 count++; 524 count++;
525 } 525 }
526 XA_BUG_ON(xa, count != 2); 526 XA_BUG_ON(xa, count != 2);
527 527
528 /* If we free a reserved entry, we sho 528 /* If we free a reserved entry, we should be able to allocate it */
529 if (xa->xa_flags & XA_FLAGS_ALLOC) { 529 if (xa->xa_flags & XA_FLAGS_ALLOC) {
530 u32 id; 530 u32 id;
531 531
532 XA_BUG_ON(xa, xa_alloc(xa, &id 532 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_value(8),
533 XA_LIM 533 XA_LIMIT(5, 10), GFP_KERNEL) != 0);
534 XA_BUG_ON(xa, id != 8); 534 XA_BUG_ON(xa, id != 8);
535 535
536 xa_release(xa, 6); 536 xa_release(xa, 6);
537 XA_BUG_ON(xa, xa_alloc(xa, &id 537 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_value(6),
538 XA_LIM 538 XA_LIMIT(5, 10), GFP_KERNEL) != 0);
539 XA_BUG_ON(xa, id != 6); 539 XA_BUG_ON(xa, id != 6);
540 } 540 }
541 541
542 xa_destroy(xa); 542 xa_destroy(xa);
543 } 543 }
544 544
545 static noinline void check_xas_erase(struct xa 545 static noinline void check_xas_erase(struct xarray *xa)
546 { 546 {
547 XA_STATE(xas, xa, 0); 547 XA_STATE(xas, xa, 0);
548 void *entry; 548 void *entry;
549 unsigned long i, j; 549 unsigned long i, j;
550 550
551 for (i = 0; i < 200; i++) { 551 for (i = 0; i < 200; i++) {
552 for (j = i; j < 2 * i + 17; j+ 552 for (j = i; j < 2 * i + 17; j++) {
553 xas_set(&xas, j); 553 xas_set(&xas, j);
554 do { 554 do {
555 xas_lock(&xas) 555 xas_lock(&xas);
556 xas_store(&xas 556 xas_store(&xas, xa_mk_index(j));
557 xas_unlock(&xa 557 xas_unlock(&xas);
558 } while (xas_nomem(&xa 558 } while (xas_nomem(&xas, GFP_KERNEL));
559 } 559 }
560 560
561 xas_set(&xas, ULONG_MAX); 561 xas_set(&xas, ULONG_MAX);
562 do { 562 do {
563 xas_lock(&xas); 563 xas_lock(&xas);
564 xas_store(&xas, xa_mk_ 564 xas_store(&xas, xa_mk_value(0));
565 xas_unlock(&xas); 565 xas_unlock(&xas);
566 } while (xas_nomem(&xas, GFP_K 566 } while (xas_nomem(&xas, GFP_KERNEL));
567 567
568 xas_lock(&xas); 568 xas_lock(&xas);
569 xas_store(&xas, NULL); 569 xas_store(&xas, NULL);
570 570
571 xas_set(&xas, 0); 571 xas_set(&xas, 0);
572 j = i; 572 j = i;
573 xas_for_each(&xas, entry, ULON 573 xas_for_each(&xas, entry, ULONG_MAX) {
574 XA_BUG_ON(xa, entry != 574 XA_BUG_ON(xa, entry != xa_mk_index(j));
575 xas_store(&xas, NULL); 575 xas_store(&xas, NULL);
576 j++; 576 j++;
577 } 577 }
578 xas_unlock(&xas); 578 xas_unlock(&xas);
579 XA_BUG_ON(xa, !xa_empty(xa)); 579 XA_BUG_ON(xa, !xa_empty(xa));
580 } 580 }
581 } 581 }
582 582
583 #ifdef CONFIG_XARRAY_MULTI 583 #ifdef CONFIG_XARRAY_MULTI
584 static noinline void check_multi_store_1(struc 584 static noinline void check_multi_store_1(struct xarray *xa, unsigned long index,
585 unsigned int order) 585 unsigned int order)
586 { 586 {
587 XA_STATE(xas, xa, index); 587 XA_STATE(xas, xa, index);
588 unsigned long min = index & ~((1UL << 588 unsigned long min = index & ~((1UL << order) - 1);
589 unsigned long max = min + (1UL << orde 589 unsigned long max = min + (1UL << order);
590 590
591 xa_store_order(xa, index, order, xa_mk 591 xa_store_order(xa, index, order, xa_mk_index(index), GFP_KERNEL);
592 XA_BUG_ON(xa, xa_load(xa, min) != xa_m 592 XA_BUG_ON(xa, xa_load(xa, min) != xa_mk_index(index));
593 XA_BUG_ON(xa, xa_load(xa, max - 1) != 593 XA_BUG_ON(xa, xa_load(xa, max - 1) != xa_mk_index(index));
594 XA_BUG_ON(xa, xa_load(xa, max) != NULL 594 XA_BUG_ON(xa, xa_load(xa, max) != NULL);
595 XA_BUG_ON(xa, xa_load(xa, min - 1) != 595 XA_BUG_ON(xa, xa_load(xa, min - 1) != NULL);
596 596
597 xas_lock(&xas); 597 xas_lock(&xas);
598 XA_BUG_ON(xa, xas_store(&xas, xa_mk_in 598 XA_BUG_ON(xa, xas_store(&xas, xa_mk_index(min)) != xa_mk_index(index));
599 xas_unlock(&xas); 599 xas_unlock(&xas);
600 XA_BUG_ON(xa, xa_load(xa, min) != xa_m 600 XA_BUG_ON(xa, xa_load(xa, min) != xa_mk_index(min));
601 XA_BUG_ON(xa, xa_load(xa, max - 1) != 601 XA_BUG_ON(xa, xa_load(xa, max - 1) != xa_mk_index(min));
602 XA_BUG_ON(xa, xa_load(xa, max) != NULL 602 XA_BUG_ON(xa, xa_load(xa, max) != NULL);
603 XA_BUG_ON(xa, xa_load(xa, min - 1) != 603 XA_BUG_ON(xa, xa_load(xa, min - 1) != NULL);
604 604
605 xa_erase_index(xa, min); 605 xa_erase_index(xa, min);
606 XA_BUG_ON(xa, !xa_empty(xa)); 606 XA_BUG_ON(xa, !xa_empty(xa));
607 } 607 }
608 608
609 static noinline void check_multi_store_2(struc 609 static noinline void check_multi_store_2(struct xarray *xa, unsigned long index,
610 unsigned int order) 610 unsigned int order)
611 { 611 {
612 XA_STATE(xas, xa, index); 612 XA_STATE(xas, xa, index);
613 xa_store_order(xa, index, order, xa_mk 613 xa_store_order(xa, index, order, xa_mk_value(0), GFP_KERNEL);
614 614
615 xas_lock(&xas); 615 xas_lock(&xas);
616 XA_BUG_ON(xa, xas_store(&xas, xa_mk_va 616 XA_BUG_ON(xa, xas_store(&xas, xa_mk_value(1)) != xa_mk_value(0));
617 XA_BUG_ON(xa, xas.xa_index != index); 617 XA_BUG_ON(xa, xas.xa_index != index);
618 XA_BUG_ON(xa, xas_store(&xas, NULL) != 618 XA_BUG_ON(xa, xas_store(&xas, NULL) != xa_mk_value(1));
619 xas_unlock(&xas); 619 xas_unlock(&xas);
620 XA_BUG_ON(xa, !xa_empty(xa)); 620 XA_BUG_ON(xa, !xa_empty(xa));
621 } 621 }
622 622
623 static noinline void check_multi_store_3(struc 623 static noinline void check_multi_store_3(struct xarray *xa, unsigned long index,
624 unsigned int order) 624 unsigned int order)
625 { 625 {
626 XA_STATE(xas, xa, 0); 626 XA_STATE(xas, xa, 0);
627 void *entry; 627 void *entry;
628 int n = 0; 628 int n = 0;
629 629
630 xa_store_order(xa, index, order, xa_mk 630 xa_store_order(xa, index, order, xa_mk_index(index), GFP_KERNEL);
631 631
632 xas_lock(&xas); 632 xas_lock(&xas);
633 xas_for_each(&xas, entry, ULONG_MAX) { 633 xas_for_each(&xas, entry, ULONG_MAX) {
634 XA_BUG_ON(xa, entry != xa_mk_i 634 XA_BUG_ON(xa, entry != xa_mk_index(index));
635 n++; 635 n++;
636 } 636 }
637 XA_BUG_ON(xa, n != 1); 637 XA_BUG_ON(xa, n != 1);
638 xas_set(&xas, index + 1); 638 xas_set(&xas, index + 1);
639 xas_for_each(&xas, entry, ULONG_MAX) { 639 xas_for_each(&xas, entry, ULONG_MAX) {
640 XA_BUG_ON(xa, entry != xa_mk_i 640 XA_BUG_ON(xa, entry != xa_mk_index(index));
641 n++; 641 n++;
642 } 642 }
643 XA_BUG_ON(xa, n != 2); 643 XA_BUG_ON(xa, n != 2);
644 xas_unlock(&xas); 644 xas_unlock(&xas);
645 645
646 xa_destroy(xa); 646 xa_destroy(xa);
647 } 647 }
648 #endif 648 #endif
649 649
650 static noinline void check_multi_store(struct 650 static noinline void check_multi_store(struct xarray *xa)
651 { 651 {
652 #ifdef CONFIG_XARRAY_MULTI 652 #ifdef CONFIG_XARRAY_MULTI
653 unsigned long i, j, k; 653 unsigned long i, j, k;
654 unsigned int max_order = (sizeof(long) 654 unsigned int max_order = (sizeof(long) == 4) ? 30 : 60;
655 655
656 /* Loading from any position returns t 656 /* Loading from any position returns the same value */
657 xa_store_order(xa, 0, 1, xa_mk_value(0 657 xa_store_order(xa, 0, 1, xa_mk_value(0), GFP_KERNEL);
658 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_ 658 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(0));
659 XA_BUG_ON(xa, xa_load(xa, 1) != xa_mk_ 659 XA_BUG_ON(xa, xa_load(xa, 1) != xa_mk_value(0));
660 XA_BUG_ON(xa, xa_load(xa, 2) != NULL); 660 XA_BUG_ON(xa, xa_load(xa, 2) != NULL);
661 rcu_read_lock(); 661 rcu_read_lock();
662 XA_BUG_ON(xa, xa_to_node(xa_head(xa))- 662 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->count != 2);
663 XA_BUG_ON(xa, xa_to_node(xa_head(xa))- 663 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->nr_values != 2);
664 rcu_read_unlock(); 664 rcu_read_unlock();
665 665
666 /* Storing adjacent to the value does 666 /* Storing adjacent to the value does not alter the value */
667 xa_store(xa, 3, xa, GFP_KERNEL); 667 xa_store(xa, 3, xa, GFP_KERNEL);
668 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_ 668 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(0));
669 XA_BUG_ON(xa, xa_load(xa, 1) != xa_mk_ 669 XA_BUG_ON(xa, xa_load(xa, 1) != xa_mk_value(0));
670 XA_BUG_ON(xa, xa_load(xa, 2) != NULL); 670 XA_BUG_ON(xa, xa_load(xa, 2) != NULL);
671 rcu_read_lock(); 671 rcu_read_lock();
672 XA_BUG_ON(xa, xa_to_node(xa_head(xa))- 672 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->count != 3);
673 XA_BUG_ON(xa, xa_to_node(xa_head(xa))- 673 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->nr_values != 2);
674 rcu_read_unlock(); 674 rcu_read_unlock();
675 675
676 /* Overwriting multiple indexes works 676 /* Overwriting multiple indexes works */
677 xa_store_order(xa, 0, 2, xa_mk_value(1 677 xa_store_order(xa, 0, 2, xa_mk_value(1), GFP_KERNEL);
678 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_ 678 XA_BUG_ON(xa, xa_load(xa, 0) != xa_mk_value(1));
679 XA_BUG_ON(xa, xa_load(xa, 1) != xa_mk_ 679 XA_BUG_ON(xa, xa_load(xa, 1) != xa_mk_value(1));
680 XA_BUG_ON(xa, xa_load(xa, 2) != xa_mk_ 680 XA_BUG_ON(xa, xa_load(xa, 2) != xa_mk_value(1));
681 XA_BUG_ON(xa, xa_load(xa, 3) != xa_mk_ 681 XA_BUG_ON(xa, xa_load(xa, 3) != xa_mk_value(1));
682 XA_BUG_ON(xa, xa_load(xa, 4) != NULL); 682 XA_BUG_ON(xa, xa_load(xa, 4) != NULL);
683 rcu_read_lock(); 683 rcu_read_lock();
684 XA_BUG_ON(xa, xa_to_node(xa_head(xa))- 684 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->count != 4);
685 XA_BUG_ON(xa, xa_to_node(xa_head(xa))- 685 XA_BUG_ON(xa, xa_to_node(xa_head(xa))->nr_values != 4);
686 rcu_read_unlock(); 686 rcu_read_unlock();
687 687
688 /* We can erase multiple values with a 688 /* We can erase multiple values with a single store */
689 xa_store_order(xa, 0, BITS_PER_LONG - 689 xa_store_order(xa, 0, BITS_PER_LONG - 1, NULL, GFP_KERNEL);
690 XA_BUG_ON(xa, !xa_empty(xa)); 690 XA_BUG_ON(xa, !xa_empty(xa));
691 691
692 /* Even when the first slot is empty b 692 /* Even when the first slot is empty but the others aren't */
693 xa_store_index(xa, 1, GFP_KERNEL); 693 xa_store_index(xa, 1, GFP_KERNEL);
694 xa_store_index(xa, 2, GFP_KERNEL); 694 xa_store_index(xa, 2, GFP_KERNEL);
695 xa_store_order(xa, 0, 2, NULL, GFP_KER 695 xa_store_order(xa, 0, 2, NULL, GFP_KERNEL);
696 XA_BUG_ON(xa, !xa_empty(xa)); 696 XA_BUG_ON(xa, !xa_empty(xa));
697 697
698 for (i = 0; i < max_order; i++) { 698 for (i = 0; i < max_order; i++) {
699 for (j = 0; j < max_order; j++ 699 for (j = 0; j < max_order; j++) {
700 xa_store_order(xa, 0, 700 xa_store_order(xa, 0, i, xa_mk_index(i), GFP_KERNEL);
701 xa_store_order(xa, 0, 701 xa_store_order(xa, 0, j, xa_mk_index(j), GFP_KERNEL);
702 702
703 for (k = 0; k < max_or 703 for (k = 0; k < max_order; k++) {
704 void *entry = 704 void *entry = xa_load(xa, (1UL << k) - 1);
705 if ((i < k) && 705 if ((i < k) && (j < k))
706 XA_BUG 706 XA_BUG_ON(xa, entry != NULL);
707 else 707 else
708 XA_BUG 708 XA_BUG_ON(xa, entry != xa_mk_index(j));
709 } 709 }
710 710
711 xa_erase(xa, 0); 711 xa_erase(xa, 0);
712 XA_BUG_ON(xa, !xa_empt 712 XA_BUG_ON(xa, !xa_empty(xa));
713 } 713 }
714 } 714 }
715 715
716 for (i = 0; i < 20; i++) { 716 for (i = 0; i < 20; i++) {
717 check_multi_store_1(xa, 200, i 717 check_multi_store_1(xa, 200, i);
718 check_multi_store_1(xa, 0, i); 718 check_multi_store_1(xa, 0, i);
719 check_multi_store_1(xa, (1UL < 719 check_multi_store_1(xa, (1UL << i) + 1, i);
720 } 720 }
721 check_multi_store_2(xa, 4095, 9); 721 check_multi_store_2(xa, 4095, 9);
722 722
723 for (i = 1; i < 20; i++) { 723 for (i = 1; i < 20; i++) {
724 check_multi_store_3(xa, 0, i); 724 check_multi_store_3(xa, 0, i);
725 check_multi_store_3(xa, 1UL << 725 check_multi_store_3(xa, 1UL << i, i);
726 } 726 }
727 #endif 727 #endif
728 } 728 }
729 729
730 #ifdef CONFIG_XARRAY_MULTI 730 #ifdef CONFIG_XARRAY_MULTI
731 /* mimics page cache __filemap_add_folio() */ 731 /* mimics page cache __filemap_add_folio() */
732 static noinline void check_xa_multi_store_adv_ 732 static noinline void check_xa_multi_store_adv_add(struct xarray *xa,
733 733 unsigned long index,
734 734 unsigned int order,
735 735 void *p)
736 { 736 {
737 XA_STATE(xas, xa, index); 737 XA_STATE(xas, xa, index);
738 unsigned int nrpages = 1UL << order; 738 unsigned int nrpages = 1UL << order;
739 739
740 /* users are responsible for index ali 740 /* users are responsible for index alignemnt to the order when adding */
741 XA_BUG_ON(xa, index & (nrpages - 1)); 741 XA_BUG_ON(xa, index & (nrpages - 1));
742 742
743 xas_set_order(&xas, index, order); 743 xas_set_order(&xas, index, order);
744 744
745 do { 745 do {
746 xas_lock_irq(&xas); 746 xas_lock_irq(&xas);
747 xas_store(&xas, p); 747 xas_store(&xas, p);
748 xas_unlock_irq(&xas); 748 xas_unlock_irq(&xas);
749 /* 749 /*
750 * In our selftest case the on 750 * In our selftest case the only failure we can expect is for
751 * there not to be enough memo 751 * there not to be enough memory as we're not mimicking the
752 * entire page cache, so verif 752 * entire page cache, so verify that's the only error we can run
753 * into here. The xas_nomem() 753 * into here. The xas_nomem() which follows will ensure to fix
754 * that condition for us so to 754 * that condition for us so to chug on on the loop.
755 */ 755 */
756 XA_BUG_ON(xa, xas_error(&xas) 756 XA_BUG_ON(xa, xas_error(&xas) && xas_error(&xas) != -ENOMEM);
757 } while (xas_nomem(&xas, GFP_KERNEL)); 757 } while (xas_nomem(&xas, GFP_KERNEL));
758 758
759 XA_BUG_ON(xa, xas_error(&xas)); 759 XA_BUG_ON(xa, xas_error(&xas));
760 XA_BUG_ON(xa, xa_load(xa, index) != p) 760 XA_BUG_ON(xa, xa_load(xa, index) != p);
761 } 761 }
762 762
763 /* mimics page_cache_delete() */ 763 /* mimics page_cache_delete() */
764 static noinline void check_xa_multi_store_adv_ 764 static noinline void check_xa_multi_store_adv_del_entry(struct xarray *xa,
765 765 unsigned long index,
766 766 unsigned int order)
767 { 767 {
768 XA_STATE(xas, xa, index); 768 XA_STATE(xas, xa, index);
769 769
770 xas_set_order(&xas, index, order); 770 xas_set_order(&xas, index, order);
771 xas_store(&xas, NULL); 771 xas_store(&xas, NULL);
772 xas_init_marks(&xas); 772 xas_init_marks(&xas);
773 } 773 }
774 774
775 static noinline void check_xa_multi_store_adv_ 775 static noinline void check_xa_multi_store_adv_delete(struct xarray *xa,
776 776 unsigned long index,
777 777 unsigned int order)
778 { 778 {
779 xa_lock_irq(xa); 779 xa_lock_irq(xa);
780 check_xa_multi_store_adv_del_entry(xa, 780 check_xa_multi_store_adv_del_entry(xa, index, order);
781 xa_unlock_irq(xa); 781 xa_unlock_irq(xa);
782 } 782 }
783 783
784 /* mimics page cache filemap_get_entry() */ 784 /* mimics page cache filemap_get_entry() */
785 static noinline void *test_get_entry(struct xa 785 static noinline void *test_get_entry(struct xarray *xa, unsigned long index)
786 { 786 {
787 XA_STATE(xas, xa, index); 787 XA_STATE(xas, xa, index);
788 void *p; 788 void *p;
789 static unsigned int loops = 0; 789 static unsigned int loops = 0;
790 790
791 rcu_read_lock(); 791 rcu_read_lock();
792 repeat: 792 repeat:
793 xas_reset(&xas); 793 xas_reset(&xas);
794 p = xas_load(&xas); 794 p = xas_load(&xas);
795 if (xas_retry(&xas, p)) 795 if (xas_retry(&xas, p))
796 goto repeat; 796 goto repeat;
797 rcu_read_unlock(); 797 rcu_read_unlock();
798 798
799 /* 799 /*
800 * This is not part of the page cache, 800 * This is not part of the page cache, this selftest is pretty
801 * aggressive and does not want to tru 801 * aggressive and does not want to trust the xarray API but rather
802 * test it, and for order 20 (4 GiB bl 802 * test it, and for order 20 (4 GiB block size) we can loop over
803 * over a million entries which can ca 803 * over a million entries which can cause a soft lockup. Page cache
804 * APIs won't be stupid, proper page c 804 * APIs won't be stupid, proper page cache APIs loop over the proper
805 * order so when using a larger order 805 * order so when using a larger order we skip shared entries.
806 */ 806 */
807 if (++loops % XA_CHECK_SCHED == 0) 807 if (++loops % XA_CHECK_SCHED == 0)
808 schedule(); 808 schedule();
809 809
810 return p; 810 return p;
811 } 811 }
812 812
813 static unsigned long some_val = 0xdeadbeef; 813 static unsigned long some_val = 0xdeadbeef;
814 static unsigned long some_val_2 = 0xdeaddead; 814 static unsigned long some_val_2 = 0xdeaddead;
815 815
816 /* mimics the page cache usage */ 816 /* mimics the page cache usage */
817 static noinline void check_xa_multi_store_adv( 817 static noinline void check_xa_multi_store_adv(struct xarray *xa,
818 818 unsigned long pos,
819 819 unsigned int order)
820 { 820 {
821 unsigned int nrpages = 1UL << order; 821 unsigned int nrpages = 1UL << order;
822 unsigned long index, base, next_index, 822 unsigned long index, base, next_index, next_next_index;
823 unsigned int i; 823 unsigned int i;
824 824
825 index = pos >> PAGE_SHIFT; 825 index = pos >> PAGE_SHIFT;
826 base = round_down(index, nrpages); 826 base = round_down(index, nrpages);
827 next_index = round_down(base + nrpages 827 next_index = round_down(base + nrpages, nrpages);
828 next_next_index = round_down(next_inde 828 next_next_index = round_down(next_index + nrpages, nrpages);
829 829
830 check_xa_multi_store_adv_add(xa, base, 830 check_xa_multi_store_adv_add(xa, base, order, &some_val);
831 831
832 for (i = 0; i < nrpages; i++) 832 for (i = 0; i < nrpages; i++)
833 XA_BUG_ON(xa, test_get_entry(x 833 XA_BUG_ON(xa, test_get_entry(xa, base + i) != &some_val);
834 834
835 XA_BUG_ON(xa, test_get_entry(xa, next_ 835 XA_BUG_ON(xa, test_get_entry(xa, next_index) != NULL);
836 836
837 /* Use order 0 for the next item */ 837 /* Use order 0 for the next item */
838 check_xa_multi_store_adv_add(xa, next_ 838 check_xa_multi_store_adv_add(xa, next_index, 0, &some_val_2);
839 XA_BUG_ON(xa, test_get_entry(xa, next_ 839 XA_BUG_ON(xa, test_get_entry(xa, next_index) != &some_val_2);
840 840
841 /* Remove the next item */ 841 /* Remove the next item */
842 check_xa_multi_store_adv_delete(xa, ne 842 check_xa_multi_store_adv_delete(xa, next_index, 0);
843 843
844 /* Now use order for a new pointer */ 844 /* Now use order for a new pointer */
845 check_xa_multi_store_adv_add(xa, next_ 845 check_xa_multi_store_adv_add(xa, next_index, order, &some_val_2);
846 846
847 for (i = 0; i < nrpages; i++) 847 for (i = 0; i < nrpages; i++)
848 XA_BUG_ON(xa, test_get_entry(x 848 XA_BUG_ON(xa, test_get_entry(xa, next_index + i) != &some_val_2);
849 849
850 check_xa_multi_store_adv_delete(xa, ne 850 check_xa_multi_store_adv_delete(xa, next_index, order);
851 check_xa_multi_store_adv_delete(xa, ba 851 check_xa_multi_store_adv_delete(xa, base, order);
852 XA_BUG_ON(xa, !xa_empty(xa)); 852 XA_BUG_ON(xa, !xa_empty(xa));
853 853
854 /* starting fresh again */ 854 /* starting fresh again */
855 855
856 /* let's test some holes now */ 856 /* let's test some holes now */
857 857
858 /* hole at base and next_next */ 858 /* hole at base and next_next */
859 check_xa_multi_store_adv_add(xa, next_ 859 check_xa_multi_store_adv_add(xa, next_index, order, &some_val_2);
860 860
861 for (i = 0; i < nrpages; i++) 861 for (i = 0; i < nrpages; i++)
862 XA_BUG_ON(xa, test_get_entry(x 862 XA_BUG_ON(xa, test_get_entry(xa, base + i) != NULL);
863 863
864 for (i = 0; i < nrpages; i++) 864 for (i = 0; i < nrpages; i++)
865 XA_BUG_ON(xa, test_get_entry(x 865 XA_BUG_ON(xa, test_get_entry(xa, next_index + i) != &some_val_2);
866 866
867 for (i = 0; i < nrpages; i++) 867 for (i = 0; i < nrpages; i++)
868 XA_BUG_ON(xa, test_get_entry(x 868 XA_BUG_ON(xa, test_get_entry(xa, next_next_index + i) != NULL);
869 869
870 check_xa_multi_store_adv_delete(xa, ne 870 check_xa_multi_store_adv_delete(xa, next_index, order);
871 XA_BUG_ON(xa, !xa_empty(xa)); 871 XA_BUG_ON(xa, !xa_empty(xa));
872 872
873 /* hole at base and next */ 873 /* hole at base and next */
874 874
875 check_xa_multi_store_adv_add(xa, next_ 875 check_xa_multi_store_adv_add(xa, next_next_index, order, &some_val_2);
876 876
877 for (i = 0; i < nrpages; i++) 877 for (i = 0; i < nrpages; i++)
878 XA_BUG_ON(xa, test_get_entry(x 878 XA_BUG_ON(xa, test_get_entry(xa, base + i) != NULL);
879 879
880 for (i = 0; i < nrpages; i++) 880 for (i = 0; i < nrpages; i++)
881 XA_BUG_ON(xa, test_get_entry(x 881 XA_BUG_ON(xa, test_get_entry(xa, next_index + i) != NULL);
882 882
883 for (i = 0; i < nrpages; i++) 883 for (i = 0; i < nrpages; i++)
884 XA_BUG_ON(xa, test_get_entry(x 884 XA_BUG_ON(xa, test_get_entry(xa, next_next_index + i) != &some_val_2);
885 885
886 check_xa_multi_store_adv_delete(xa, ne 886 check_xa_multi_store_adv_delete(xa, next_next_index, order);
887 XA_BUG_ON(xa, !xa_empty(xa)); 887 XA_BUG_ON(xa, !xa_empty(xa));
888 } 888 }
889 #endif 889 #endif
890 890
891 static noinline void check_multi_store_advance 891 static noinline void check_multi_store_advanced(struct xarray *xa)
892 { 892 {
893 #ifdef CONFIG_XARRAY_MULTI 893 #ifdef CONFIG_XARRAY_MULTI
894 unsigned int max_order = IS_ENABLED(CO 894 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 20 : 1;
895 unsigned long end = ULONG_MAX/2; 895 unsigned long end = ULONG_MAX/2;
896 unsigned long pos, i; 896 unsigned long pos, i;
897 897
898 /* 898 /*
899 * About 117 million tests below. 899 * About 117 million tests below.
900 */ 900 */
901 for (pos = 7; pos < end; pos = (pos * 901 for (pos = 7; pos < end; pos = (pos * pos) + 564) {
902 for (i = 0; i < max_order; i++ 902 for (i = 0; i < max_order; i++) {
903 check_xa_multi_store_a 903 check_xa_multi_store_adv(xa, pos, i);
904 check_xa_multi_store_a 904 check_xa_multi_store_adv(xa, pos + 157, i);
905 } 905 }
906 } 906 }
907 #endif 907 #endif
908 } 908 }
909 909
910 static noinline void check_xa_alloc_1(struct x 910 static noinline void check_xa_alloc_1(struct xarray *xa, unsigned int base)
911 { 911 {
912 int i; 912 int i;
913 u32 id; 913 u32 id;
914 914
915 XA_BUG_ON(xa, !xa_empty(xa)); 915 XA_BUG_ON(xa, !xa_empty(xa));
916 /* An empty array should assign %base 916 /* An empty array should assign %base to the first alloc */
917 xa_alloc_index(xa, base, GFP_KERNEL); 917 xa_alloc_index(xa, base, GFP_KERNEL);
918 918
919 /* Erasing it should make the array em 919 /* Erasing it should make the array empty again */
920 xa_erase_index(xa, base); 920 xa_erase_index(xa, base);
921 XA_BUG_ON(xa, !xa_empty(xa)); 921 XA_BUG_ON(xa, !xa_empty(xa));
922 922
923 /* And it should assign %base again */ 923 /* And it should assign %base again */
924 xa_alloc_index(xa, base, GFP_KERNEL); 924 xa_alloc_index(xa, base, GFP_KERNEL);
925 925
926 /* Allocating and then erasing a lot s 926 /* Allocating and then erasing a lot should not lose base */
927 for (i = base + 1; i < 2 * XA_CHUNK_SI 927 for (i = base + 1; i < 2 * XA_CHUNK_SIZE; i++)
928 xa_alloc_index(xa, i, GFP_KERN 928 xa_alloc_index(xa, i, GFP_KERNEL);
929 for (i = base; i < 2 * XA_CHUNK_SIZE; 929 for (i = base; i < 2 * XA_CHUNK_SIZE; i++)
930 xa_erase_index(xa, i); 930 xa_erase_index(xa, i);
931 xa_alloc_index(xa, base, GFP_KERNEL); 931 xa_alloc_index(xa, base, GFP_KERNEL);
932 932
933 /* Destroying the array should do the 933 /* Destroying the array should do the same as erasing */
934 xa_destroy(xa); 934 xa_destroy(xa);
935 935
936 /* And it should assign %base again */ 936 /* And it should assign %base again */
937 xa_alloc_index(xa, base, GFP_KERNEL); 937 xa_alloc_index(xa, base, GFP_KERNEL);
938 938
939 /* The next assigned ID should be base 939 /* The next assigned ID should be base+1 */
940 xa_alloc_index(xa, base + 1, GFP_KERNE 940 xa_alloc_index(xa, base + 1, GFP_KERNEL);
941 xa_erase_index(xa, base + 1); 941 xa_erase_index(xa, base + 1);
942 942
943 /* Storing a value should mark it used 943 /* Storing a value should mark it used */
944 xa_store_index(xa, base + 1, GFP_KERNE 944 xa_store_index(xa, base + 1, GFP_KERNEL);
945 xa_alloc_index(xa, base + 2, GFP_KERNE 945 xa_alloc_index(xa, base + 2, GFP_KERNEL);
946 946
947 /* If we then erase base, it should be 947 /* If we then erase base, it should be free */
948 xa_erase_index(xa, base); 948 xa_erase_index(xa, base);
949 xa_alloc_index(xa, base, GFP_KERNEL); 949 xa_alloc_index(xa, base, GFP_KERNEL);
950 950
951 xa_erase_index(xa, base + 1); 951 xa_erase_index(xa, base + 1);
952 xa_erase_index(xa, base + 2); 952 xa_erase_index(xa, base + 2);
953 953
954 for (i = 1; i < 5000; i++) { 954 for (i = 1; i < 5000; i++) {
955 xa_alloc_index(xa, base + i, G 955 xa_alloc_index(xa, base + i, GFP_KERNEL);
956 } 956 }
957 957
958 xa_destroy(xa); 958 xa_destroy(xa);
959 959
960 /* Check that we fail properly at the 960 /* Check that we fail properly at the limit of allocation */
961 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_ 961 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(UINT_MAX - 1),
962 XA_LIMIT(UINT_ 962 XA_LIMIT(UINT_MAX - 1, UINT_MAX),
963 GFP_KERNEL) != 963 GFP_KERNEL) != 0);
964 XA_BUG_ON(xa, id != 0xfffffffeU); 964 XA_BUG_ON(xa, id != 0xfffffffeU);
965 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_ 965 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(UINT_MAX),
966 XA_LIMIT(UINT_ 966 XA_LIMIT(UINT_MAX - 1, UINT_MAX),
967 GFP_KERNEL) != 967 GFP_KERNEL) != 0);
968 XA_BUG_ON(xa, id != 0xffffffffU); 968 XA_BUG_ON(xa, id != 0xffffffffU);
969 id = 3; 969 id = 3;
970 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_ 970 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(0),
971 XA_LIMIT(UINT_ 971 XA_LIMIT(UINT_MAX - 1, UINT_MAX),
972 GFP_KERNEL) != 972 GFP_KERNEL) != -EBUSY);
973 XA_BUG_ON(xa, id != 3); 973 XA_BUG_ON(xa, id != 3);
974 xa_destroy(xa); 974 xa_destroy(xa);
975 975
976 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_ 976 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(10), XA_LIMIT(10, 5),
977 GFP_KERNEL) != 977 GFP_KERNEL) != -EBUSY);
978 XA_BUG_ON(xa, xa_store_index(xa, 3, GF 978 XA_BUG_ON(xa, xa_store_index(xa, 3, GFP_KERNEL) != 0);
979 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_ 979 XA_BUG_ON(xa, xa_alloc(xa, &id, xa_mk_index(10), XA_LIMIT(10, 5),
980 GFP_KERNEL) != 980 GFP_KERNEL) != -EBUSY);
981 xa_erase_index(xa, 3); 981 xa_erase_index(xa, 3);
982 XA_BUG_ON(xa, !xa_empty(xa)); 982 XA_BUG_ON(xa, !xa_empty(xa));
983 } 983 }
984 984
985 static noinline void check_xa_alloc_2(struct x 985 static noinline void check_xa_alloc_2(struct xarray *xa, unsigned int base)
986 { 986 {
987 unsigned int i, id; 987 unsigned int i, id;
988 unsigned long index; 988 unsigned long index;
989 void *entry; 989 void *entry;
990 990
991 /* Allocate and free a NULL and check 991 /* Allocate and free a NULL and check xa_empty() behaves */
992 XA_BUG_ON(xa, !xa_empty(xa)); 992 XA_BUG_ON(xa, !xa_empty(xa));
993 XA_BUG_ON(xa, xa_alloc(xa, &id, NULL, 993 XA_BUG_ON(xa, xa_alloc(xa, &id, NULL, xa_limit_32b, GFP_KERNEL) != 0);
994 XA_BUG_ON(xa, id != base); 994 XA_BUG_ON(xa, id != base);
995 XA_BUG_ON(xa, xa_empty(xa)); 995 XA_BUG_ON(xa, xa_empty(xa));
996 XA_BUG_ON(xa, xa_erase(xa, id) != NULL 996 XA_BUG_ON(xa, xa_erase(xa, id) != NULL);
997 XA_BUG_ON(xa, !xa_empty(xa)); 997 XA_BUG_ON(xa, !xa_empty(xa));
998 998
999 /* Ditto, but check destroy instead of 999 /* Ditto, but check destroy instead of erase */
1000 XA_BUG_ON(xa, !xa_empty(xa)); 1000 XA_BUG_ON(xa, !xa_empty(xa));
1001 XA_BUG_ON(xa, xa_alloc(xa, &id, NULL, 1001 XA_BUG_ON(xa, xa_alloc(xa, &id, NULL, xa_limit_32b, GFP_KERNEL) != 0);
1002 XA_BUG_ON(xa, id != base); 1002 XA_BUG_ON(xa, id != base);
1003 XA_BUG_ON(xa, xa_empty(xa)); 1003 XA_BUG_ON(xa, xa_empty(xa));
1004 xa_destroy(xa); 1004 xa_destroy(xa);
1005 XA_BUG_ON(xa, !xa_empty(xa)); 1005 XA_BUG_ON(xa, !xa_empty(xa));
1006 1006
1007 for (i = base; i < base + 10; i++) { 1007 for (i = base; i < base + 10; i++) {
1008 XA_BUG_ON(xa, xa_alloc(xa, &i 1008 XA_BUG_ON(xa, xa_alloc(xa, &id, NULL, xa_limit_32b,
1009 GFP_K 1009 GFP_KERNEL) != 0);
1010 XA_BUG_ON(xa, id != i); 1010 XA_BUG_ON(xa, id != i);
1011 } 1011 }
1012 1012
1013 XA_BUG_ON(xa, xa_store(xa, 3, xa_mk_i 1013 XA_BUG_ON(xa, xa_store(xa, 3, xa_mk_index(3), GFP_KERNEL) != NULL);
1014 XA_BUG_ON(xa, xa_store(xa, 4, xa_mk_i 1014 XA_BUG_ON(xa, xa_store(xa, 4, xa_mk_index(4), GFP_KERNEL) != NULL);
1015 XA_BUG_ON(xa, xa_store(xa, 4, NULL, G 1015 XA_BUG_ON(xa, xa_store(xa, 4, NULL, GFP_KERNEL) != xa_mk_index(4));
1016 XA_BUG_ON(xa, xa_erase(xa, 5) != NULL 1016 XA_BUG_ON(xa, xa_erase(xa, 5) != NULL);
1017 XA_BUG_ON(xa, xa_alloc(xa, &id, NULL, 1017 XA_BUG_ON(xa, xa_alloc(xa, &id, NULL, xa_limit_32b, GFP_KERNEL) != 0);
1018 XA_BUG_ON(xa, id != 5); 1018 XA_BUG_ON(xa, id != 5);
1019 1019
1020 xa_for_each(xa, index, entry) { 1020 xa_for_each(xa, index, entry) {
1021 xa_erase_index(xa, index); 1021 xa_erase_index(xa, index);
1022 } 1022 }
1023 1023
1024 for (i = base; i < base + 9; i++) { 1024 for (i = base; i < base + 9; i++) {
1025 XA_BUG_ON(xa, xa_erase(xa, i) 1025 XA_BUG_ON(xa, xa_erase(xa, i) != NULL);
1026 XA_BUG_ON(xa, xa_empty(xa)); 1026 XA_BUG_ON(xa, xa_empty(xa));
1027 } 1027 }
1028 XA_BUG_ON(xa, xa_erase(xa, 8) != NULL 1028 XA_BUG_ON(xa, xa_erase(xa, 8) != NULL);
1029 XA_BUG_ON(xa, xa_empty(xa)); 1029 XA_BUG_ON(xa, xa_empty(xa));
1030 XA_BUG_ON(xa, xa_erase(xa, base + 9) 1030 XA_BUG_ON(xa, xa_erase(xa, base + 9) != NULL);
1031 XA_BUG_ON(xa, !xa_empty(xa)); 1031 XA_BUG_ON(xa, !xa_empty(xa));
1032 1032
1033 xa_destroy(xa); 1033 xa_destroy(xa);
1034 } 1034 }
1035 1035
1036 static noinline void check_xa_alloc_3(struct 1036 static noinline void check_xa_alloc_3(struct xarray *xa, unsigned int base)
1037 { 1037 {
1038 struct xa_limit limit = XA_LIMIT(1, 0 1038 struct xa_limit limit = XA_LIMIT(1, 0x3fff);
1039 u32 next = 0; 1039 u32 next = 0;
1040 unsigned int i, id; 1040 unsigned int i, id;
1041 unsigned long index; 1041 unsigned long index;
1042 void *entry; 1042 void *entry;
1043 1043
1044 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id 1044 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, xa_mk_index(1), limit,
1045 &next, GFP_KE 1045 &next, GFP_KERNEL) != 0);
1046 XA_BUG_ON(xa, id != 1); 1046 XA_BUG_ON(xa, id != 1);
1047 1047
1048 next = 0x3ffd; 1048 next = 0x3ffd;
1049 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id 1049 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, xa_mk_index(0x3ffd), limit,
1050 &next, GFP_KE 1050 &next, GFP_KERNEL) != 0);
1051 XA_BUG_ON(xa, id != 0x3ffd); 1051 XA_BUG_ON(xa, id != 0x3ffd);
1052 xa_erase_index(xa, 0x3ffd); 1052 xa_erase_index(xa, 0x3ffd);
1053 xa_erase_index(xa, 1); 1053 xa_erase_index(xa, 1);
1054 XA_BUG_ON(xa, !xa_empty(xa)); 1054 XA_BUG_ON(xa, !xa_empty(xa));
1055 1055
1056 for (i = 0x3ffe; i < 0x4003; i++) { 1056 for (i = 0x3ffe; i < 0x4003; i++) {
1057 if (i < 0x4000) 1057 if (i < 0x4000)
1058 entry = xa_mk_index(i 1058 entry = xa_mk_index(i);
1059 else 1059 else
1060 entry = xa_mk_index(i 1060 entry = xa_mk_index(i - 0x3fff);
1061 XA_BUG_ON(xa, xa_alloc_cyclic 1061 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, entry, limit,
1062 &next 1062 &next, GFP_KERNEL) != (id == 1));
1063 XA_BUG_ON(xa, xa_mk_index(id) 1063 XA_BUG_ON(xa, xa_mk_index(id) != entry);
1064 } 1064 }
1065 1065
1066 /* Check wrap-around is handled corre 1066 /* Check wrap-around is handled correctly */
1067 if (base != 0) 1067 if (base != 0)
1068 xa_erase_index(xa, base); 1068 xa_erase_index(xa, base);
1069 xa_erase_index(xa, base + 1); 1069 xa_erase_index(xa, base + 1);
1070 next = UINT_MAX; 1070 next = UINT_MAX;
1071 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id 1071 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, xa_mk_index(UINT_MAX),
1072 xa_limit_32b, 1072 xa_limit_32b, &next, GFP_KERNEL) != 0);
1073 XA_BUG_ON(xa, id != UINT_MAX); 1073 XA_BUG_ON(xa, id != UINT_MAX);
1074 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id 1074 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, xa_mk_index(base),
1075 xa_limit_32b, 1075 xa_limit_32b, &next, GFP_KERNEL) != 1);
1076 XA_BUG_ON(xa, id != base); 1076 XA_BUG_ON(xa, id != base);
1077 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id 1077 XA_BUG_ON(xa, xa_alloc_cyclic(xa, &id, xa_mk_index(base + 1),
1078 xa_limit_32b, 1078 xa_limit_32b, &next, GFP_KERNEL) != 0);
1079 XA_BUG_ON(xa, id != base + 1); 1079 XA_BUG_ON(xa, id != base + 1);
1080 1080
1081 xa_for_each(xa, index, entry) 1081 xa_for_each(xa, index, entry)
1082 xa_erase_index(xa, index); 1082 xa_erase_index(xa, index);
1083 1083
1084 XA_BUG_ON(xa, !xa_empty(xa)); 1084 XA_BUG_ON(xa, !xa_empty(xa));
1085 } 1085 }
1086 1086
1087 static DEFINE_XARRAY_ALLOC(xa0); 1087 static DEFINE_XARRAY_ALLOC(xa0);
1088 static DEFINE_XARRAY_ALLOC1(xa1); 1088 static DEFINE_XARRAY_ALLOC1(xa1);
1089 1089
1090 static noinline void check_xa_alloc(void) 1090 static noinline void check_xa_alloc(void)
1091 { 1091 {
1092 check_xa_alloc_1(&xa0, 0); 1092 check_xa_alloc_1(&xa0, 0);
1093 check_xa_alloc_1(&xa1, 1); 1093 check_xa_alloc_1(&xa1, 1);
1094 check_xa_alloc_2(&xa0, 0); 1094 check_xa_alloc_2(&xa0, 0);
1095 check_xa_alloc_2(&xa1, 1); 1095 check_xa_alloc_2(&xa1, 1);
1096 check_xa_alloc_3(&xa0, 0); 1096 check_xa_alloc_3(&xa0, 0);
1097 check_xa_alloc_3(&xa1, 1); 1097 check_xa_alloc_3(&xa1, 1);
1098 } 1098 }
1099 1099
1100 static noinline void __check_store_iter(struc 1100 static noinline void __check_store_iter(struct xarray *xa, unsigned long start,
1101 unsigned int order, u 1101 unsigned int order, unsigned int present)
1102 { 1102 {
1103 XA_STATE_ORDER(xas, xa, start, order) 1103 XA_STATE_ORDER(xas, xa, start, order);
1104 void *entry; 1104 void *entry;
1105 unsigned int count = 0; 1105 unsigned int count = 0;
1106 1106
1107 retry: 1107 retry:
1108 xas_lock(&xas); 1108 xas_lock(&xas);
1109 xas_for_each_conflict(&xas, entry) { 1109 xas_for_each_conflict(&xas, entry) {
1110 XA_BUG_ON(xa, !xa_is_value(en 1110 XA_BUG_ON(xa, !xa_is_value(entry));
1111 XA_BUG_ON(xa, entry < xa_mk_i 1111 XA_BUG_ON(xa, entry < xa_mk_index(start));
1112 XA_BUG_ON(xa, entry > xa_mk_i 1112 XA_BUG_ON(xa, entry > xa_mk_index(start + (1UL << order) - 1));
1113 count++; 1113 count++;
1114 } 1114 }
1115 xas_store(&xas, xa_mk_index(start)); 1115 xas_store(&xas, xa_mk_index(start));
1116 xas_unlock(&xas); 1116 xas_unlock(&xas);
1117 if (xas_nomem(&xas, GFP_KERNEL)) { 1117 if (xas_nomem(&xas, GFP_KERNEL)) {
1118 count = 0; 1118 count = 0;
1119 goto retry; 1119 goto retry;
1120 } 1120 }
1121 XA_BUG_ON(xa, xas_error(&xas)); 1121 XA_BUG_ON(xa, xas_error(&xas));
1122 XA_BUG_ON(xa, count != present); 1122 XA_BUG_ON(xa, count != present);
1123 XA_BUG_ON(xa, xa_load(xa, start) != x 1123 XA_BUG_ON(xa, xa_load(xa, start) != xa_mk_index(start));
1124 XA_BUG_ON(xa, xa_load(xa, start + (1U 1124 XA_BUG_ON(xa, xa_load(xa, start + (1UL << order) - 1) !=
1125 xa_mk_index(start)); 1125 xa_mk_index(start));
1126 xa_erase_index(xa, start); 1126 xa_erase_index(xa, start);
1127 } 1127 }
1128 1128
1129 static noinline void check_store_iter(struct 1129 static noinline void check_store_iter(struct xarray *xa)
1130 { 1130 {
1131 unsigned int i, j; 1131 unsigned int i, j;
1132 unsigned int max_order = IS_ENABLED(C 1132 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 20 : 1;
1133 1133
1134 for (i = 0; i < max_order; i++) { 1134 for (i = 0; i < max_order; i++) {
1135 unsigned int min = 1 << i; 1135 unsigned int min = 1 << i;
1136 unsigned int max = (2 << i) - 1136 unsigned int max = (2 << i) - 1;
1137 __check_store_iter(xa, 0, i, 1137 __check_store_iter(xa, 0, i, 0);
1138 XA_BUG_ON(xa, !xa_empty(xa)); 1138 XA_BUG_ON(xa, !xa_empty(xa));
1139 __check_store_iter(xa, min, i 1139 __check_store_iter(xa, min, i, 0);
1140 XA_BUG_ON(xa, !xa_empty(xa)); 1140 XA_BUG_ON(xa, !xa_empty(xa));
1141 1141
1142 xa_store_index(xa, min, GFP_K 1142 xa_store_index(xa, min, GFP_KERNEL);
1143 __check_store_iter(xa, min, i 1143 __check_store_iter(xa, min, i, 1);
1144 XA_BUG_ON(xa, !xa_empty(xa)); 1144 XA_BUG_ON(xa, !xa_empty(xa));
1145 xa_store_index(xa, max, GFP_K 1145 xa_store_index(xa, max, GFP_KERNEL);
1146 __check_store_iter(xa, min, i 1146 __check_store_iter(xa, min, i, 1);
1147 XA_BUG_ON(xa, !xa_empty(xa)); 1147 XA_BUG_ON(xa, !xa_empty(xa));
1148 1148
1149 for (j = 0; j < min; j++) 1149 for (j = 0; j < min; j++)
1150 xa_store_index(xa, j, 1150 xa_store_index(xa, j, GFP_KERNEL);
1151 __check_store_iter(xa, 0, i, 1151 __check_store_iter(xa, 0, i, min);
1152 XA_BUG_ON(xa, !xa_empty(xa)); 1152 XA_BUG_ON(xa, !xa_empty(xa));
1153 for (j = 0; j < min; j++) 1153 for (j = 0; j < min; j++)
1154 xa_store_index(xa, mi 1154 xa_store_index(xa, min + j, GFP_KERNEL);
1155 __check_store_iter(xa, min, i 1155 __check_store_iter(xa, min, i, min);
1156 XA_BUG_ON(xa, !xa_empty(xa)); 1156 XA_BUG_ON(xa, !xa_empty(xa));
1157 } 1157 }
1158 #ifdef CONFIG_XARRAY_MULTI 1158 #ifdef CONFIG_XARRAY_MULTI
1159 xa_store_index(xa, 63, GFP_KERNEL); 1159 xa_store_index(xa, 63, GFP_KERNEL);
1160 xa_store_index(xa, 65, GFP_KERNEL); 1160 xa_store_index(xa, 65, GFP_KERNEL);
1161 __check_store_iter(xa, 64, 2, 1); 1161 __check_store_iter(xa, 64, 2, 1);
1162 xa_erase_index(xa, 63); 1162 xa_erase_index(xa, 63);
1163 #endif 1163 #endif
1164 XA_BUG_ON(xa, !xa_empty(xa)); 1164 XA_BUG_ON(xa, !xa_empty(xa));
1165 } 1165 }
1166 1166
1167 static noinline void check_multi_find_1(struc 1167 static noinline void check_multi_find_1(struct xarray *xa, unsigned order)
1168 { 1168 {
1169 #ifdef CONFIG_XARRAY_MULTI 1169 #ifdef CONFIG_XARRAY_MULTI
1170 unsigned long multi = 3 << order; 1170 unsigned long multi = 3 << order;
1171 unsigned long next = 4 << order; 1171 unsigned long next = 4 << order;
1172 unsigned long index; 1172 unsigned long index;
1173 1173
1174 xa_store_order(xa, multi, order, xa_m 1174 xa_store_order(xa, multi, order, xa_mk_value(multi), GFP_KERNEL);
1175 XA_BUG_ON(xa, xa_store_index(xa, next 1175 XA_BUG_ON(xa, xa_store_index(xa, next, GFP_KERNEL) != NULL);
1176 XA_BUG_ON(xa, xa_store_index(xa, next 1176 XA_BUG_ON(xa, xa_store_index(xa, next + 1, GFP_KERNEL) != NULL);
1177 1177
1178 index = 0; 1178 index = 0;
1179 XA_BUG_ON(xa, xa_find(xa, &index, ULO 1179 XA_BUG_ON(xa, xa_find(xa, &index, ULONG_MAX, XA_PRESENT) !=
1180 xa_mk_value(multi)); 1180 xa_mk_value(multi));
1181 XA_BUG_ON(xa, index != multi); 1181 XA_BUG_ON(xa, index != multi);
1182 index = multi + 1; 1182 index = multi + 1;
1183 XA_BUG_ON(xa, xa_find(xa, &index, ULO 1183 XA_BUG_ON(xa, xa_find(xa, &index, ULONG_MAX, XA_PRESENT) !=
1184 xa_mk_value(multi)); 1184 xa_mk_value(multi));
1185 XA_BUG_ON(xa, (index < multi) || (ind 1185 XA_BUG_ON(xa, (index < multi) || (index >= next));
1186 XA_BUG_ON(xa, xa_find_after(xa, &inde 1186 XA_BUG_ON(xa, xa_find_after(xa, &index, ULONG_MAX, XA_PRESENT) !=
1187 xa_mk_value(next)); 1187 xa_mk_value(next));
1188 XA_BUG_ON(xa, index != next); 1188 XA_BUG_ON(xa, index != next);
1189 XA_BUG_ON(xa, xa_find_after(xa, &inde 1189 XA_BUG_ON(xa, xa_find_after(xa, &index, next, XA_PRESENT) != NULL);
1190 XA_BUG_ON(xa, index != next); 1190 XA_BUG_ON(xa, index != next);
1191 1191
1192 xa_erase_index(xa, multi); 1192 xa_erase_index(xa, multi);
1193 xa_erase_index(xa, next); 1193 xa_erase_index(xa, next);
1194 xa_erase_index(xa, next + 1); 1194 xa_erase_index(xa, next + 1);
1195 XA_BUG_ON(xa, !xa_empty(xa)); 1195 XA_BUG_ON(xa, !xa_empty(xa));
1196 #endif 1196 #endif
1197 } 1197 }
1198 1198
1199 static noinline void check_multi_find_2(struc 1199 static noinline void check_multi_find_2(struct xarray *xa)
1200 { 1200 {
1201 unsigned int max_order = IS_ENABLED(C 1201 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 10 : 1;
1202 unsigned int i, j; 1202 unsigned int i, j;
1203 void *entry; 1203 void *entry;
1204 1204
1205 for (i = 0; i < max_order; i++) { 1205 for (i = 0; i < max_order; i++) {
1206 unsigned long index = 1UL << 1206 unsigned long index = 1UL << i;
1207 for (j = 0; j < index; j++) { 1207 for (j = 0; j < index; j++) {
1208 XA_STATE(xas, xa, j + 1208 XA_STATE(xas, xa, j + index);
1209 xa_store_index(xa, in 1209 xa_store_index(xa, index - 1, GFP_KERNEL);
1210 xa_store_order(xa, in 1210 xa_store_order(xa, index, i, xa_mk_index(index),
1211 GFP_K 1211 GFP_KERNEL);
1212 rcu_read_lock(); 1212 rcu_read_lock();
1213 xas_for_each(&xas, en 1213 xas_for_each(&xas, entry, ULONG_MAX) {
1214 xa_erase_inde 1214 xa_erase_index(xa, index);
1215 } 1215 }
1216 rcu_read_unlock(); 1216 rcu_read_unlock();
1217 xa_erase_index(xa, in 1217 xa_erase_index(xa, index - 1);
1218 XA_BUG_ON(xa, !xa_emp 1218 XA_BUG_ON(xa, !xa_empty(xa));
1219 } 1219 }
1220 } 1220 }
1221 } 1221 }
1222 1222
1223 static noinline void check_multi_find_3(struc 1223 static noinline void check_multi_find_3(struct xarray *xa)
1224 { 1224 {
1225 unsigned int order; 1225 unsigned int order;
1226 1226
1227 for (order = 5; order < order_limit; 1227 for (order = 5; order < order_limit; order++) {
1228 unsigned long index = 1UL << 1228 unsigned long index = 1UL << (order - 5);
1229 1229
1230 XA_BUG_ON(xa, !xa_empty(xa)); 1230 XA_BUG_ON(xa, !xa_empty(xa));
1231 xa_store_order(xa, 0, order - 1231 xa_store_order(xa, 0, order - 4, xa_mk_index(0), GFP_KERNEL);
1232 XA_BUG_ON(xa, xa_find_after(x 1232 XA_BUG_ON(xa, xa_find_after(xa, &index, ULONG_MAX, XA_PRESENT));
1233 xa_erase_index(xa, 0); 1233 xa_erase_index(xa, 0);
1234 } 1234 }
1235 } 1235 }
1236 1236
1237 static noinline void check_find_1(struct xarr 1237 static noinline void check_find_1(struct xarray *xa)
1238 { 1238 {
1239 unsigned long i, j, k; 1239 unsigned long i, j, k;
1240 1240
1241 XA_BUG_ON(xa, !xa_empty(xa)); 1241 XA_BUG_ON(xa, !xa_empty(xa));
1242 1242
1243 /* 1243 /*
1244 * Check xa_find with all pairs betwe 1244 * Check xa_find with all pairs between 0 and 99 inclusive,
1245 * starting at every index between 0 1245 * starting at every index between 0 and 99
1246 */ 1246 */
1247 for (i = 0; i < 100; i++) { 1247 for (i = 0; i < 100; i++) {
1248 XA_BUG_ON(xa, xa_store_index( 1248 XA_BUG_ON(xa, xa_store_index(xa, i, GFP_KERNEL) != NULL);
1249 xa_set_mark(xa, i, XA_MARK_0) 1249 xa_set_mark(xa, i, XA_MARK_0);
1250 for (j = 0; j < i; j++) { 1250 for (j = 0; j < i; j++) {
1251 XA_BUG_ON(xa, xa_stor 1251 XA_BUG_ON(xa, xa_store_index(xa, j, GFP_KERNEL) !=
1252 NULL) 1252 NULL);
1253 xa_set_mark(xa, j, XA 1253 xa_set_mark(xa, j, XA_MARK_0);
1254 for (k = 0; k < 100; 1254 for (k = 0; k < 100; k++) {
1255 unsigned long 1255 unsigned long index = k;
1256 void *entry = 1256 void *entry = xa_find(xa, &index, ULONG_MAX,
1257 1257 XA_PRESENT);
1258 if (k <= j) 1258 if (k <= j)
1259 XA_BU 1259 XA_BUG_ON(xa, index != j);
1260 else if (k <= 1260 else if (k <= i)
1261 XA_BU 1261 XA_BUG_ON(xa, index != i);
1262 else 1262 else
1263 XA_BU 1263 XA_BUG_ON(xa, entry != NULL);
1264 1264
1265 index = k; 1265 index = k;
1266 entry = xa_fi 1266 entry = xa_find(xa, &index, ULONG_MAX,
1267 1267 XA_MARK_0);
1268 if (k <= j) 1268 if (k <= j)
1269 XA_BU 1269 XA_BUG_ON(xa, index != j);
1270 else if (k <= 1270 else if (k <= i)
1271 XA_BU 1271 XA_BUG_ON(xa, index != i);
1272 else 1272 else
1273 XA_BU 1273 XA_BUG_ON(xa, entry != NULL);
1274 } 1274 }
1275 xa_erase_index(xa, j) 1275 xa_erase_index(xa, j);
1276 XA_BUG_ON(xa, xa_get_ 1276 XA_BUG_ON(xa, xa_get_mark(xa, j, XA_MARK_0));
1277 XA_BUG_ON(xa, !xa_get 1277 XA_BUG_ON(xa, !xa_get_mark(xa, i, XA_MARK_0));
1278 } 1278 }
1279 xa_erase_index(xa, i); 1279 xa_erase_index(xa, i);
1280 XA_BUG_ON(xa, xa_get_mark(xa, 1280 XA_BUG_ON(xa, xa_get_mark(xa, i, XA_MARK_0));
1281 } 1281 }
1282 XA_BUG_ON(xa, !xa_empty(xa)); 1282 XA_BUG_ON(xa, !xa_empty(xa));
1283 } 1283 }
1284 1284
1285 static noinline void check_find_2(struct xarr 1285 static noinline void check_find_2(struct xarray *xa)
1286 { 1286 {
1287 void *entry; 1287 void *entry;
1288 unsigned long i, j, index; 1288 unsigned long i, j, index;
1289 1289
1290 xa_for_each(xa, index, entry) { 1290 xa_for_each(xa, index, entry) {
1291 XA_BUG_ON(xa, true); 1291 XA_BUG_ON(xa, true);
1292 } 1292 }
1293 1293
1294 for (i = 0; i < 1024; i++) { 1294 for (i = 0; i < 1024; i++) {
1295 xa_store_index(xa, index, GFP 1295 xa_store_index(xa, index, GFP_KERNEL);
1296 j = 0; 1296 j = 0;
1297 xa_for_each(xa, index, entry) 1297 xa_for_each(xa, index, entry) {
1298 XA_BUG_ON(xa, xa_mk_i 1298 XA_BUG_ON(xa, xa_mk_index(index) != entry);
1299 XA_BUG_ON(xa, index ! 1299 XA_BUG_ON(xa, index != j++);
1300 } 1300 }
1301 } 1301 }
1302 1302
1303 xa_destroy(xa); 1303 xa_destroy(xa);
1304 } 1304 }
1305 1305
1306 static noinline void check_find_3(struct xarr 1306 static noinline void check_find_3(struct xarray *xa)
1307 { 1307 {
1308 XA_STATE(xas, xa, 0); 1308 XA_STATE(xas, xa, 0);
1309 unsigned long i, j, k; 1309 unsigned long i, j, k;
1310 void *entry; 1310 void *entry;
1311 1311
1312 for (i = 0; i < 100; i++) { 1312 for (i = 0; i < 100; i++) {
1313 for (j = 0; j < 100; j++) { 1313 for (j = 0; j < 100; j++) {
1314 rcu_read_lock(); 1314 rcu_read_lock();
1315 for (k = 0; k < 100; 1315 for (k = 0; k < 100; k++) {
1316 xas_set(&xas, 1316 xas_set(&xas, j);
1317 xas_for_each_ 1317 xas_for_each_marked(&xas, entry, k, XA_MARK_0)
1318 ; 1318 ;
1319 if (j > k) 1319 if (j > k)
1320 XA_BU 1320 XA_BUG_ON(xa,
1321 1321 xas.xa_node != XAS_RESTART);
1322 } 1322 }
1323 rcu_read_unlock(); 1323 rcu_read_unlock();
1324 } 1324 }
1325 xa_store_index(xa, i, GFP_KER 1325 xa_store_index(xa, i, GFP_KERNEL);
1326 xa_set_mark(xa, i, XA_MARK_0) 1326 xa_set_mark(xa, i, XA_MARK_0);
1327 } 1327 }
1328 xa_destroy(xa); 1328 xa_destroy(xa);
1329 } 1329 }
1330 1330
1331 static noinline void check_find_4(struct xarr 1331 static noinline void check_find_4(struct xarray *xa)
1332 { 1332 {
1333 unsigned long index = 0; 1333 unsigned long index = 0;
1334 void *entry; 1334 void *entry;
1335 1335
1336 xa_store_index(xa, ULONG_MAX, GFP_KER 1336 xa_store_index(xa, ULONG_MAX, GFP_KERNEL);
1337 1337
1338 entry = xa_find_after(xa, &index, ULO 1338 entry = xa_find_after(xa, &index, ULONG_MAX, XA_PRESENT);
1339 XA_BUG_ON(xa, entry != xa_mk_index(UL 1339 XA_BUG_ON(xa, entry != xa_mk_index(ULONG_MAX));
1340 1340
1341 entry = xa_find_after(xa, &index, ULO 1341 entry = xa_find_after(xa, &index, ULONG_MAX, XA_PRESENT);
1342 XA_BUG_ON(xa, entry); 1342 XA_BUG_ON(xa, entry);
1343 1343
1344 xa_erase_index(xa, ULONG_MAX); 1344 xa_erase_index(xa, ULONG_MAX);
1345 } 1345 }
1346 1346
1347 static noinline void check_find(struct xarray 1347 static noinline void check_find(struct xarray *xa)
1348 { 1348 {
1349 unsigned i; 1349 unsigned i;
1350 1350
1351 check_find_1(xa); 1351 check_find_1(xa);
1352 check_find_2(xa); 1352 check_find_2(xa);
1353 check_find_3(xa); 1353 check_find_3(xa);
1354 check_find_4(xa); 1354 check_find_4(xa);
1355 1355
1356 for (i = 2; i < 10; i++) 1356 for (i = 2; i < 10; i++)
1357 check_multi_find_1(xa, i); 1357 check_multi_find_1(xa, i);
1358 check_multi_find_2(xa); 1358 check_multi_find_2(xa);
1359 check_multi_find_3(xa); 1359 check_multi_find_3(xa);
1360 } 1360 }
1361 1361
1362 /* See find_swap_entry() in mm/shmem.c */ 1362 /* See find_swap_entry() in mm/shmem.c */
1363 static noinline unsigned long xa_find_entry(s 1363 static noinline unsigned long xa_find_entry(struct xarray *xa, void *item)
1364 { 1364 {
1365 XA_STATE(xas, xa, 0); 1365 XA_STATE(xas, xa, 0);
1366 unsigned int checked = 0; 1366 unsigned int checked = 0;
1367 void *entry; 1367 void *entry;
1368 1368
1369 rcu_read_lock(); 1369 rcu_read_lock();
1370 xas_for_each(&xas, entry, ULONG_MAX) 1370 xas_for_each(&xas, entry, ULONG_MAX) {
1371 if (xas_retry(&xas, entry)) 1371 if (xas_retry(&xas, entry))
1372 continue; 1372 continue;
1373 if (entry == item) 1373 if (entry == item)
1374 break; 1374 break;
1375 checked++; 1375 checked++;
1376 if ((checked % 4) != 0) 1376 if ((checked % 4) != 0)
1377 continue; 1377 continue;
1378 xas_pause(&xas); 1378 xas_pause(&xas);
1379 } 1379 }
1380 rcu_read_unlock(); 1380 rcu_read_unlock();
1381 1381
1382 return entry ? xas.xa_index : -1; 1382 return entry ? xas.xa_index : -1;
1383 } 1383 }
1384 1384
1385 static noinline void check_find_entry(struct 1385 static noinline void check_find_entry(struct xarray *xa)
1386 { 1386 {
1387 #ifdef CONFIG_XARRAY_MULTI 1387 #ifdef CONFIG_XARRAY_MULTI
1388 unsigned int order; 1388 unsigned int order;
1389 unsigned long offset, index; 1389 unsigned long offset, index;
1390 1390
1391 for (order = 0; order < 20; order++) 1391 for (order = 0; order < 20; order++) {
1392 for (offset = 0; offset < (1U 1392 for (offset = 0; offset < (1UL << (order + 3));
1393 offset += (1UL << order) 1393 offset += (1UL << order)) {
1394 for (index = 0; index 1394 for (index = 0; index < (1UL << (order + 5));
1395 index += (1UL << 1395 index += (1UL << order)) {
1396 xa_store_orde 1396 xa_store_order(xa, index, order,
1397 1397 xa_mk_index(index), GFP_KERNEL);
1398 XA_BUG_ON(xa, 1398 XA_BUG_ON(xa, xa_load(xa, index) !=
1399 1399 xa_mk_index(index));
1400 XA_BUG_ON(xa, 1400 XA_BUG_ON(xa, xa_find_entry(xa,
1401 1401 xa_mk_index(index)) != index);
1402 } 1402 }
1403 XA_BUG_ON(xa, xa_find 1403 XA_BUG_ON(xa, xa_find_entry(xa, xa) != -1);
1404 xa_destroy(xa); 1404 xa_destroy(xa);
1405 } 1405 }
1406 } 1406 }
1407 #endif 1407 #endif
1408 1408
1409 XA_BUG_ON(xa, xa_find_entry(xa, xa) ! 1409 XA_BUG_ON(xa, xa_find_entry(xa, xa) != -1);
1410 xa_store_index(xa, ULONG_MAX, GFP_KER 1410 xa_store_index(xa, ULONG_MAX, GFP_KERNEL);
1411 XA_BUG_ON(xa, xa_find_entry(xa, xa) ! 1411 XA_BUG_ON(xa, xa_find_entry(xa, xa) != -1);
1412 XA_BUG_ON(xa, xa_find_entry(xa, xa_mk 1412 XA_BUG_ON(xa, xa_find_entry(xa, xa_mk_index(ULONG_MAX)) != -1);
1413 xa_erase_index(xa, ULONG_MAX); 1413 xa_erase_index(xa, ULONG_MAX);
1414 XA_BUG_ON(xa, !xa_empty(xa)); 1414 XA_BUG_ON(xa, !xa_empty(xa));
1415 } 1415 }
1416 1416
1417 static noinline void check_pause(struct xarra 1417 static noinline void check_pause(struct xarray *xa)
1418 { 1418 {
1419 XA_STATE(xas, xa, 0); 1419 XA_STATE(xas, xa, 0);
1420 void *entry; 1420 void *entry;
1421 unsigned int order; 1421 unsigned int order;
1422 unsigned long index = 1; 1422 unsigned long index = 1;
1423 unsigned int count = 0; 1423 unsigned int count = 0;
1424 1424
1425 for (order = 0; order < order_limit; 1425 for (order = 0; order < order_limit; order++) {
1426 XA_BUG_ON(xa, xa_store_order( 1426 XA_BUG_ON(xa, xa_store_order(xa, index, order,
1427 xa_mk 1427 xa_mk_index(index), GFP_KERNEL));
1428 index += 1UL << order; 1428 index += 1UL << order;
1429 } 1429 }
1430 1430
1431 rcu_read_lock(); 1431 rcu_read_lock();
1432 xas_for_each(&xas, entry, ULONG_MAX) 1432 xas_for_each(&xas, entry, ULONG_MAX) {
1433 XA_BUG_ON(xa, entry != xa_mk_ 1433 XA_BUG_ON(xa, entry != xa_mk_index(1UL << count));
1434 count++; 1434 count++;
1435 } 1435 }
1436 rcu_read_unlock(); 1436 rcu_read_unlock();
1437 XA_BUG_ON(xa, count != order_limit); 1437 XA_BUG_ON(xa, count != order_limit);
1438 1438
1439 count = 0; 1439 count = 0;
1440 xas_set(&xas, 0); 1440 xas_set(&xas, 0);
1441 rcu_read_lock(); 1441 rcu_read_lock();
1442 xas_for_each(&xas, entry, ULONG_MAX) 1442 xas_for_each(&xas, entry, ULONG_MAX) {
1443 XA_BUG_ON(xa, entry != xa_mk_ 1443 XA_BUG_ON(xa, entry != xa_mk_index(1UL << count));
1444 count++; 1444 count++;
1445 xas_pause(&xas); 1445 xas_pause(&xas);
1446 } 1446 }
1447 rcu_read_unlock(); 1447 rcu_read_unlock();
1448 XA_BUG_ON(xa, count != order_limit); 1448 XA_BUG_ON(xa, count != order_limit);
1449 1449
1450 xa_destroy(xa); 1450 xa_destroy(xa);
1451 } 1451 }
1452 1452
1453 static noinline void check_move_tiny(struct x 1453 static noinline void check_move_tiny(struct xarray *xa)
1454 { 1454 {
1455 XA_STATE(xas, xa, 0); 1455 XA_STATE(xas, xa, 0);
1456 1456
1457 XA_BUG_ON(xa, !xa_empty(xa)); 1457 XA_BUG_ON(xa, !xa_empty(xa));
1458 rcu_read_lock(); 1458 rcu_read_lock();
1459 XA_BUG_ON(xa, xas_next(&xas) != NULL) 1459 XA_BUG_ON(xa, xas_next(&xas) != NULL);
1460 XA_BUG_ON(xa, xas_next(&xas) != NULL) 1460 XA_BUG_ON(xa, xas_next(&xas) != NULL);
1461 rcu_read_unlock(); 1461 rcu_read_unlock();
1462 xa_store_index(xa, 0, GFP_KERNEL); 1462 xa_store_index(xa, 0, GFP_KERNEL);
1463 rcu_read_lock(); 1463 rcu_read_lock();
1464 xas_set(&xas, 0); 1464 xas_set(&xas, 0);
1465 XA_BUG_ON(xa, xas_next(&xas) != xa_mk 1465 XA_BUG_ON(xa, xas_next(&xas) != xa_mk_index(0));
1466 XA_BUG_ON(xa, xas_next(&xas) != NULL) 1466 XA_BUG_ON(xa, xas_next(&xas) != NULL);
1467 xas_set(&xas, 0); 1467 xas_set(&xas, 0);
1468 XA_BUG_ON(xa, xas_prev(&xas) != xa_mk 1468 XA_BUG_ON(xa, xas_prev(&xas) != xa_mk_index(0));
1469 XA_BUG_ON(xa, xas_prev(&xas) != NULL) 1469 XA_BUG_ON(xa, xas_prev(&xas) != NULL);
1470 rcu_read_unlock(); 1470 rcu_read_unlock();
1471 xa_erase_index(xa, 0); 1471 xa_erase_index(xa, 0);
1472 XA_BUG_ON(xa, !xa_empty(xa)); 1472 XA_BUG_ON(xa, !xa_empty(xa));
1473 } 1473 }
1474 1474
1475 static noinline void check_move_max(struct xa 1475 static noinline void check_move_max(struct xarray *xa)
1476 { 1476 {
1477 XA_STATE(xas, xa, 0); 1477 XA_STATE(xas, xa, 0);
1478 1478
1479 xa_store_index(xa, ULONG_MAX, GFP_KER 1479 xa_store_index(xa, ULONG_MAX, GFP_KERNEL);
1480 rcu_read_lock(); 1480 rcu_read_lock();
1481 XA_BUG_ON(xa, xas_find(&xas, ULONG_MA 1481 XA_BUG_ON(xa, xas_find(&xas, ULONG_MAX) != xa_mk_index(ULONG_MAX));
1482 XA_BUG_ON(xa, xas_find(&xas, ULONG_MA 1482 XA_BUG_ON(xa, xas_find(&xas, ULONG_MAX) != NULL);
1483 rcu_read_unlock(); 1483 rcu_read_unlock();
1484 1484
1485 xas_set(&xas, 0); 1485 xas_set(&xas, 0);
1486 rcu_read_lock(); 1486 rcu_read_lock();
1487 XA_BUG_ON(xa, xas_find(&xas, ULONG_MA 1487 XA_BUG_ON(xa, xas_find(&xas, ULONG_MAX) != xa_mk_index(ULONG_MAX));
1488 xas_pause(&xas); 1488 xas_pause(&xas);
1489 XA_BUG_ON(xa, xas_find(&xas, ULONG_MA 1489 XA_BUG_ON(xa, xas_find(&xas, ULONG_MAX) != NULL);
1490 rcu_read_unlock(); 1490 rcu_read_unlock();
1491 1491
1492 xa_erase_index(xa, ULONG_MAX); 1492 xa_erase_index(xa, ULONG_MAX);
1493 XA_BUG_ON(xa, !xa_empty(xa)); 1493 XA_BUG_ON(xa, !xa_empty(xa));
1494 } 1494 }
1495 1495
1496 static noinline void check_move_small(struct 1496 static noinline void check_move_small(struct xarray *xa, unsigned long idx)
1497 { 1497 {
1498 XA_STATE(xas, xa, 0); 1498 XA_STATE(xas, xa, 0);
1499 unsigned long i; 1499 unsigned long i;
1500 1500
1501 xa_store_index(xa, 0, GFP_KERNEL); 1501 xa_store_index(xa, 0, GFP_KERNEL);
1502 xa_store_index(xa, idx, GFP_KERNEL); 1502 xa_store_index(xa, idx, GFP_KERNEL);
1503 1503
1504 rcu_read_lock(); 1504 rcu_read_lock();
1505 for (i = 0; i < idx * 4; i++) { 1505 for (i = 0; i < idx * 4; i++) {
1506 void *entry = xas_next(&xas); 1506 void *entry = xas_next(&xas);
1507 if (i <= idx) 1507 if (i <= idx)
1508 XA_BUG_ON(xa, xas.xa_ 1508 XA_BUG_ON(xa, xas.xa_node == XAS_RESTART);
1509 XA_BUG_ON(xa, xas.xa_index != 1509 XA_BUG_ON(xa, xas.xa_index != i);
1510 if (i == 0 || i == idx) 1510 if (i == 0 || i == idx)
1511 XA_BUG_ON(xa, entry ! 1511 XA_BUG_ON(xa, entry != xa_mk_index(i));
1512 else 1512 else
1513 XA_BUG_ON(xa, entry ! 1513 XA_BUG_ON(xa, entry != NULL);
1514 } 1514 }
1515 xas_next(&xas); 1515 xas_next(&xas);
1516 XA_BUG_ON(xa, xas.xa_index != i); 1516 XA_BUG_ON(xa, xas.xa_index != i);
1517 1517
1518 do { 1518 do {
1519 void *entry = xas_prev(&xas); 1519 void *entry = xas_prev(&xas);
1520 i--; 1520 i--;
1521 if (i <= idx) 1521 if (i <= idx)
1522 XA_BUG_ON(xa, xas.xa_ 1522 XA_BUG_ON(xa, xas.xa_node == XAS_RESTART);
1523 XA_BUG_ON(xa, xas.xa_index != 1523 XA_BUG_ON(xa, xas.xa_index != i);
1524 if (i == 0 || i == idx) 1524 if (i == 0 || i == idx)
1525 XA_BUG_ON(xa, entry ! 1525 XA_BUG_ON(xa, entry != xa_mk_index(i));
1526 else 1526 else
1527 XA_BUG_ON(xa, entry ! 1527 XA_BUG_ON(xa, entry != NULL);
1528 } while (i > 0); 1528 } while (i > 0);
1529 1529
1530 xas_set(&xas, ULONG_MAX); 1530 xas_set(&xas, ULONG_MAX);
1531 XA_BUG_ON(xa, xas_next(&xas) != NULL) 1531 XA_BUG_ON(xa, xas_next(&xas) != NULL);
1532 XA_BUG_ON(xa, xas.xa_index != ULONG_M 1532 XA_BUG_ON(xa, xas.xa_index != ULONG_MAX);
1533 XA_BUG_ON(xa, xas_next(&xas) != xa_mk 1533 XA_BUG_ON(xa, xas_next(&xas) != xa_mk_value(0));
1534 XA_BUG_ON(xa, xas.xa_index != 0); 1534 XA_BUG_ON(xa, xas.xa_index != 0);
1535 XA_BUG_ON(xa, xas_prev(&xas) != NULL) 1535 XA_BUG_ON(xa, xas_prev(&xas) != NULL);
1536 XA_BUG_ON(xa, xas.xa_index != ULONG_M 1536 XA_BUG_ON(xa, xas.xa_index != ULONG_MAX);
1537 rcu_read_unlock(); 1537 rcu_read_unlock();
1538 1538
1539 xa_erase_index(xa, 0); 1539 xa_erase_index(xa, 0);
1540 xa_erase_index(xa, idx); 1540 xa_erase_index(xa, idx);
1541 XA_BUG_ON(xa, !xa_empty(xa)); 1541 XA_BUG_ON(xa, !xa_empty(xa));
1542 } 1542 }
1543 1543
1544 static noinline void check_move(struct xarray 1544 static noinline void check_move(struct xarray *xa)
1545 { 1545 {
1546 XA_STATE(xas, xa, (1 << 16) - 1); 1546 XA_STATE(xas, xa, (1 << 16) - 1);
1547 unsigned long i; 1547 unsigned long i;
1548 1548
1549 for (i = 0; i < (1 << 16); i++) 1549 for (i = 0; i < (1 << 16); i++)
1550 XA_BUG_ON(xa, xa_store_index( 1550 XA_BUG_ON(xa, xa_store_index(xa, i, GFP_KERNEL) != NULL);
1551 1551
1552 rcu_read_lock(); 1552 rcu_read_lock();
1553 do { 1553 do {
1554 void *entry = xas_prev(&xas); 1554 void *entry = xas_prev(&xas);
1555 i--; 1555 i--;
1556 XA_BUG_ON(xa, entry != xa_mk_ 1556 XA_BUG_ON(xa, entry != xa_mk_index(i));
1557 XA_BUG_ON(xa, i != xas.xa_ind 1557 XA_BUG_ON(xa, i != xas.xa_index);
1558 } while (i != 0); 1558 } while (i != 0);
1559 1559
1560 XA_BUG_ON(xa, xas_prev(&xas) != NULL) 1560 XA_BUG_ON(xa, xas_prev(&xas) != NULL);
1561 XA_BUG_ON(xa, xas.xa_index != ULONG_M 1561 XA_BUG_ON(xa, xas.xa_index != ULONG_MAX);
1562 1562
1563 do { 1563 do {
1564 void *entry = xas_next(&xas); 1564 void *entry = xas_next(&xas);
1565 XA_BUG_ON(xa, entry != xa_mk_ 1565 XA_BUG_ON(xa, entry != xa_mk_index(i));
1566 XA_BUG_ON(xa, i != xas.xa_ind 1566 XA_BUG_ON(xa, i != xas.xa_index);
1567 i++; 1567 i++;
1568 } while (i < (1 << 16)); 1568 } while (i < (1 << 16));
1569 rcu_read_unlock(); 1569 rcu_read_unlock();
1570 1570
1571 for (i = (1 << 8); i < (1 << 15); i++ 1571 for (i = (1 << 8); i < (1 << 15); i++)
1572 xa_erase_index(xa, i); 1572 xa_erase_index(xa, i);
1573 1573
1574 i = xas.xa_index; 1574 i = xas.xa_index;
1575 1575
1576 rcu_read_lock(); 1576 rcu_read_lock();
1577 do { 1577 do {
1578 void *entry = xas_prev(&xas); 1578 void *entry = xas_prev(&xas);
1579 i--; 1579 i--;
1580 if ((i < (1 << 8)) || (i >= ( 1580 if ((i < (1 << 8)) || (i >= (1 << 15)))
1581 XA_BUG_ON(xa, entry ! 1581 XA_BUG_ON(xa, entry != xa_mk_index(i));
1582 else 1582 else
1583 XA_BUG_ON(xa, entry ! 1583 XA_BUG_ON(xa, entry != NULL);
1584 XA_BUG_ON(xa, i != xas.xa_ind 1584 XA_BUG_ON(xa, i != xas.xa_index);
1585 } while (i != 0); 1585 } while (i != 0);
1586 1586
1587 XA_BUG_ON(xa, xas_prev(&xas) != NULL) 1587 XA_BUG_ON(xa, xas_prev(&xas) != NULL);
1588 XA_BUG_ON(xa, xas.xa_index != ULONG_M 1588 XA_BUG_ON(xa, xas.xa_index != ULONG_MAX);
1589 1589
1590 do { 1590 do {
1591 void *entry = xas_next(&xas); 1591 void *entry = xas_next(&xas);
1592 if ((i < (1 << 8)) || (i >= ( 1592 if ((i < (1 << 8)) || (i >= (1 << 15)))
1593 XA_BUG_ON(xa, entry ! 1593 XA_BUG_ON(xa, entry != xa_mk_index(i));
1594 else 1594 else
1595 XA_BUG_ON(xa, entry ! 1595 XA_BUG_ON(xa, entry != NULL);
1596 XA_BUG_ON(xa, i != xas.xa_ind 1596 XA_BUG_ON(xa, i != xas.xa_index);
1597 i++; 1597 i++;
1598 } while (i < (1 << 16)); 1598 } while (i < (1 << 16));
1599 rcu_read_unlock(); 1599 rcu_read_unlock();
1600 1600
1601 xa_destroy(xa); 1601 xa_destroy(xa);
1602 1602
1603 check_move_tiny(xa); 1603 check_move_tiny(xa);
1604 check_move_max(xa); 1604 check_move_max(xa);
1605 1605
1606 for (i = 0; i < 16; i++) 1606 for (i = 0; i < 16; i++)
1607 check_move_small(xa, 1UL << i 1607 check_move_small(xa, 1UL << i);
1608 1608
1609 for (i = 2; i < 16; i++) 1609 for (i = 2; i < 16; i++)
1610 check_move_small(xa, (1UL << 1610 check_move_small(xa, (1UL << i) - 1);
1611 } 1611 }
1612 1612
1613 static noinline void xa_store_many_order(stru 1613 static noinline void xa_store_many_order(struct xarray *xa,
1614 unsigned long index, unsigned 1614 unsigned long index, unsigned order)
1615 { 1615 {
1616 XA_STATE_ORDER(xas, xa, index, order) 1616 XA_STATE_ORDER(xas, xa, index, order);
1617 unsigned int i = 0; 1617 unsigned int i = 0;
1618 1618
1619 do { 1619 do {
1620 xas_lock(&xas); 1620 xas_lock(&xas);
1621 XA_BUG_ON(xa, xas_find_confli 1621 XA_BUG_ON(xa, xas_find_conflict(&xas));
1622 xas_create_range(&xas); 1622 xas_create_range(&xas);
1623 if (xas_error(&xas)) 1623 if (xas_error(&xas))
1624 goto unlock; 1624 goto unlock;
1625 for (i = 0; i < (1U << order) 1625 for (i = 0; i < (1U << order); i++) {
1626 XA_BUG_ON(xa, xas_sto 1626 XA_BUG_ON(xa, xas_store(&xas, xa_mk_index(index + i)));
1627 xas_next(&xas); 1627 xas_next(&xas);
1628 } 1628 }
1629 unlock: 1629 unlock:
1630 xas_unlock(&xas); 1630 xas_unlock(&xas);
1631 } while (xas_nomem(&xas, GFP_KERNEL)) 1631 } while (xas_nomem(&xas, GFP_KERNEL));
1632 1632
1633 XA_BUG_ON(xa, xas_error(&xas)); 1633 XA_BUG_ON(xa, xas_error(&xas));
1634 } 1634 }
1635 1635
1636 static noinline void check_create_range_1(str 1636 static noinline void check_create_range_1(struct xarray *xa,
1637 unsigned long index, unsigned 1637 unsigned long index, unsigned order)
1638 { 1638 {
1639 unsigned long i; 1639 unsigned long i;
1640 1640
1641 xa_store_many_order(xa, index, order) 1641 xa_store_many_order(xa, index, order);
1642 for (i = index; i < index + (1UL << o 1642 for (i = index; i < index + (1UL << order); i++)
1643 xa_erase_index(xa, i); 1643 xa_erase_index(xa, i);
1644 XA_BUG_ON(xa, !xa_empty(xa)); 1644 XA_BUG_ON(xa, !xa_empty(xa));
1645 } 1645 }
1646 1646
1647 static noinline void check_create_range_2(str 1647 static noinline void check_create_range_2(struct xarray *xa, unsigned order)
1648 { 1648 {
1649 unsigned long i; 1649 unsigned long i;
1650 unsigned long nr = 1UL << order; 1650 unsigned long nr = 1UL << order;
1651 1651
1652 for (i = 0; i < nr * nr; i += nr) 1652 for (i = 0; i < nr * nr; i += nr)
1653 xa_store_many_order(xa, i, or 1653 xa_store_many_order(xa, i, order);
1654 for (i = 0; i < nr * nr; i++) 1654 for (i = 0; i < nr * nr; i++)
1655 xa_erase_index(xa, i); 1655 xa_erase_index(xa, i);
1656 XA_BUG_ON(xa, !xa_empty(xa)); 1656 XA_BUG_ON(xa, !xa_empty(xa));
1657 } 1657 }
1658 1658
1659 static noinline void check_create_range_3(voi 1659 static noinline void check_create_range_3(void)
1660 { 1660 {
1661 XA_STATE(xas, NULL, 0); 1661 XA_STATE(xas, NULL, 0);
1662 xas_set_err(&xas, -EEXIST); 1662 xas_set_err(&xas, -EEXIST);
1663 xas_create_range(&xas); 1663 xas_create_range(&xas);
1664 XA_BUG_ON(NULL, xas_error(&xas) != -E 1664 XA_BUG_ON(NULL, xas_error(&xas) != -EEXIST);
1665 } 1665 }
1666 1666
1667 static noinline void check_create_range_4(str 1667 static noinline void check_create_range_4(struct xarray *xa,
1668 unsigned long index, unsigned 1668 unsigned long index, unsigned order)
1669 { 1669 {
1670 XA_STATE_ORDER(xas, xa, index, order) 1670 XA_STATE_ORDER(xas, xa, index, order);
1671 unsigned long base = xas.xa_index; 1671 unsigned long base = xas.xa_index;
1672 unsigned long i = 0; 1672 unsigned long i = 0;
1673 1673
1674 xa_store_index(xa, index, GFP_KERNEL) 1674 xa_store_index(xa, index, GFP_KERNEL);
1675 do { 1675 do {
1676 xas_lock(&xas); 1676 xas_lock(&xas);
1677 xas_create_range(&xas); 1677 xas_create_range(&xas);
1678 if (xas_error(&xas)) 1678 if (xas_error(&xas))
1679 goto unlock; 1679 goto unlock;
1680 for (i = 0; i < (1UL << order 1680 for (i = 0; i < (1UL << order); i++) {
1681 void *old = xas_store 1681 void *old = xas_store(&xas, xa_mk_index(base + i));
1682 if (xas.xa_index == i 1682 if (xas.xa_index == index)
1683 XA_BUG_ON(xa, 1683 XA_BUG_ON(xa, old != xa_mk_index(base + i));
1684 else 1684 else
1685 XA_BUG_ON(xa, 1685 XA_BUG_ON(xa, old != NULL);
1686 xas_next(&xas); 1686 xas_next(&xas);
1687 } 1687 }
1688 unlock: 1688 unlock:
1689 xas_unlock(&xas); 1689 xas_unlock(&xas);
1690 } while (xas_nomem(&xas, GFP_KERNEL)) 1690 } while (xas_nomem(&xas, GFP_KERNEL));
1691 1691
1692 XA_BUG_ON(xa, xas_error(&xas)); 1692 XA_BUG_ON(xa, xas_error(&xas));
1693 1693
1694 for (i = base; i < base + (1UL << ord 1694 for (i = base; i < base + (1UL << order); i++)
1695 xa_erase_index(xa, i); 1695 xa_erase_index(xa, i);
1696 XA_BUG_ON(xa, !xa_empty(xa)); 1696 XA_BUG_ON(xa, !xa_empty(xa));
1697 } 1697 }
1698 1698
1699 static noinline void check_create_range_5(str 1699 static noinline void check_create_range_5(struct xarray *xa,
1700 unsigned long index, unsigned 1700 unsigned long index, unsigned int order)
1701 { 1701 {
1702 XA_STATE_ORDER(xas, xa, index, order) 1702 XA_STATE_ORDER(xas, xa, index, order);
1703 unsigned int i; 1703 unsigned int i;
1704 1704
1705 xa_store_order(xa, index, order, xa_m 1705 xa_store_order(xa, index, order, xa_mk_index(index), GFP_KERNEL);
1706 1706
1707 for (i = 0; i < order + 10; i++) { 1707 for (i = 0; i < order + 10; i++) {
1708 do { 1708 do {
1709 xas_lock(&xas); 1709 xas_lock(&xas);
1710 xas_create_range(&xas 1710 xas_create_range(&xas);
1711 xas_unlock(&xas); 1711 xas_unlock(&xas);
1712 } while (xas_nomem(&xas, GFP_ 1712 } while (xas_nomem(&xas, GFP_KERNEL));
1713 } 1713 }
1714 1714
1715 xa_destroy(xa); 1715 xa_destroy(xa);
1716 } 1716 }
1717 1717
1718 static noinline void check_create_range(struc 1718 static noinline void check_create_range(struct xarray *xa)
1719 { 1719 {
1720 unsigned int order; 1720 unsigned int order;
1721 unsigned int max_order = IS_ENABLED(C 1721 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 12 : 1;
1722 1722
1723 for (order = 0; order < max_order; or 1723 for (order = 0; order < max_order; order++) {
1724 check_create_range_1(xa, 0, o 1724 check_create_range_1(xa, 0, order);
1725 check_create_range_1(xa, 1U < 1725 check_create_range_1(xa, 1U << order, order);
1726 check_create_range_1(xa, 2U < 1726 check_create_range_1(xa, 2U << order, order);
1727 check_create_range_1(xa, 3U < 1727 check_create_range_1(xa, 3U << order, order);
1728 check_create_range_1(xa, 1U < 1728 check_create_range_1(xa, 1U << 24, order);
1729 if (order < 10) 1729 if (order < 10)
1730 check_create_range_2( 1730 check_create_range_2(xa, order);
1731 1731
1732 check_create_range_4(xa, 0, o 1732 check_create_range_4(xa, 0, order);
1733 check_create_range_4(xa, 1U < 1733 check_create_range_4(xa, 1U << order, order);
1734 check_create_range_4(xa, 2U < 1734 check_create_range_4(xa, 2U << order, order);
1735 check_create_range_4(xa, 3U < 1735 check_create_range_4(xa, 3U << order, order);
1736 check_create_range_4(xa, 1U < 1736 check_create_range_4(xa, 1U << 24, order);
1737 1737
1738 check_create_range_4(xa, 1, o 1738 check_create_range_4(xa, 1, order);
1739 check_create_range_4(xa, (1U 1739 check_create_range_4(xa, (1U << order) + 1, order);
1740 check_create_range_4(xa, (2U 1740 check_create_range_4(xa, (2U << order) + 1, order);
1741 check_create_range_4(xa, (2U 1741 check_create_range_4(xa, (2U << order) - 1, order);
1742 check_create_range_4(xa, (3U 1742 check_create_range_4(xa, (3U << order) + 1, order);
1743 check_create_range_4(xa, (3U 1743 check_create_range_4(xa, (3U << order) - 1, order);
1744 check_create_range_4(xa, (1U 1744 check_create_range_4(xa, (1U << 24) + 1, order);
1745 1745
1746 check_create_range_5(xa, 0, o 1746 check_create_range_5(xa, 0, order);
1747 check_create_range_5(xa, (1U 1747 check_create_range_5(xa, (1U << order), order);
1748 } 1748 }
1749 1749
1750 check_create_range_3(); 1750 check_create_range_3();
1751 } 1751 }
1752 1752
1753 static noinline void __check_store_range(stru 1753 static noinline void __check_store_range(struct xarray *xa, unsigned long first,
1754 unsigned long last) 1754 unsigned long last)
1755 { 1755 {
1756 #ifdef CONFIG_XARRAY_MULTI 1756 #ifdef CONFIG_XARRAY_MULTI
1757 xa_store_range(xa, first, last, xa_mk 1757 xa_store_range(xa, first, last, xa_mk_index(first), GFP_KERNEL);
1758 1758
1759 XA_BUG_ON(xa, xa_load(xa, first) != x 1759 XA_BUG_ON(xa, xa_load(xa, first) != xa_mk_index(first));
1760 XA_BUG_ON(xa, xa_load(xa, last) != xa 1760 XA_BUG_ON(xa, xa_load(xa, last) != xa_mk_index(first));
1761 XA_BUG_ON(xa, xa_load(xa, first - 1) 1761 XA_BUG_ON(xa, xa_load(xa, first - 1) != NULL);
1762 XA_BUG_ON(xa, xa_load(xa, last + 1) ! 1762 XA_BUG_ON(xa, xa_load(xa, last + 1) != NULL);
1763 1763
1764 xa_store_range(xa, first, last, NULL, 1764 xa_store_range(xa, first, last, NULL, GFP_KERNEL);
1765 #endif 1765 #endif
1766 1766
1767 XA_BUG_ON(xa, !xa_empty(xa)); 1767 XA_BUG_ON(xa, !xa_empty(xa));
1768 } 1768 }
1769 1769
1770 static noinline void check_store_range(struct 1770 static noinline void check_store_range(struct xarray *xa)
1771 { 1771 {
1772 unsigned long i, j; 1772 unsigned long i, j;
1773 1773
1774 for (i = 0; i < 128; i++) { 1774 for (i = 0; i < 128; i++) {
1775 for (j = i; j < 128; j++) { 1775 for (j = i; j < 128; j++) {
1776 __check_store_range(x 1776 __check_store_range(xa, i, j);
1777 __check_store_range(x 1777 __check_store_range(xa, 128 + i, 128 + j);
1778 __check_store_range(x 1778 __check_store_range(xa, 4095 + i, 4095 + j);
1779 __check_store_range(x 1779 __check_store_range(xa, 4096 + i, 4096 + j);
1780 __check_store_range(x 1780 __check_store_range(xa, 123456 + i, 123456 + j);
1781 __check_store_range(x 1781 __check_store_range(xa, (1 << 24) + i, (1 << 24) + j);
1782 } 1782 }
1783 } 1783 }
1784 } 1784 }
1785 1785
1786 #ifdef CONFIG_XARRAY_MULTI 1786 #ifdef CONFIG_XARRAY_MULTI
1787 static void check_split_1(struct xarray *xa, 1787 static void check_split_1(struct xarray *xa, unsigned long index,
1788 unsigned int 1788 unsigned int order, unsigned int new_order)
1789 { 1789 {
1790 XA_STATE_ORDER(xas, xa, index, new_or 1790 XA_STATE_ORDER(xas, xa, index, new_order);
1791 unsigned int i, found; 1791 unsigned int i, found;
1792 void *entry; 1792 void *entry;
1793 1793
1794 xa_store_order(xa, index, order, xa, 1794 xa_store_order(xa, index, order, xa, GFP_KERNEL);
1795 xa_set_mark(xa, index, XA_MARK_1); 1795 xa_set_mark(xa, index, XA_MARK_1);
1796 1796
1797 xas_split_alloc(&xas, xa, order, GFP_ 1797 xas_split_alloc(&xas, xa, order, GFP_KERNEL);
1798 xas_lock(&xas); 1798 xas_lock(&xas);
1799 xas_split(&xas, xa, order); 1799 xas_split(&xas, xa, order);
1800 for (i = 0; i < (1 << order); i += (1 1800 for (i = 0; i < (1 << order); i += (1 << new_order))
1801 __xa_store(xa, index + i, xa_ 1801 __xa_store(xa, index + i, xa_mk_index(index + i), 0);
1802 xas_unlock(&xas); 1802 xas_unlock(&xas);
1803 1803
1804 for (i = 0; i < (1 << order); i++) { 1804 for (i = 0; i < (1 << order); i++) {
1805 unsigned int val = index + (i 1805 unsigned int val = index + (i & ~((1 << new_order) - 1));
1806 XA_BUG_ON(xa, xa_load(xa, ind 1806 XA_BUG_ON(xa, xa_load(xa, index + i) != xa_mk_index(val));
1807 } 1807 }
1808 1808
1809 xa_set_mark(xa, index, XA_MARK_0); 1809 xa_set_mark(xa, index, XA_MARK_0);
1810 XA_BUG_ON(xa, !xa_get_mark(xa, index, 1810 XA_BUG_ON(xa, !xa_get_mark(xa, index, XA_MARK_0));
1811 1811
1812 xas_set_order(&xas, index, 0); 1812 xas_set_order(&xas, index, 0);
1813 found = 0; 1813 found = 0;
1814 rcu_read_lock(); 1814 rcu_read_lock();
1815 xas_for_each_marked(&xas, entry, ULON 1815 xas_for_each_marked(&xas, entry, ULONG_MAX, XA_MARK_1) {
1816 found++; 1816 found++;
1817 XA_BUG_ON(xa, xa_is_internal( 1817 XA_BUG_ON(xa, xa_is_internal(entry));
1818 } 1818 }
1819 rcu_read_unlock(); 1819 rcu_read_unlock();
1820 XA_BUG_ON(xa, found != 1 << (order - 1820 XA_BUG_ON(xa, found != 1 << (order - new_order));
1821 1821
1822 xa_destroy(xa); 1822 xa_destroy(xa);
1823 } 1823 }
1824 1824
1825 static noinline void check_split(struct xarra 1825 static noinline void check_split(struct xarray *xa)
1826 { 1826 {
1827 unsigned int order, new_order; 1827 unsigned int order, new_order;
1828 1828
1829 XA_BUG_ON(xa, !xa_empty(xa)); 1829 XA_BUG_ON(xa, !xa_empty(xa));
1830 1830
1831 for (order = 1; order < 2 * XA_CHUNK_ 1831 for (order = 1; order < 2 * XA_CHUNK_SHIFT; order++) {
1832 for (new_order = 0; new_order 1832 for (new_order = 0; new_order < order; new_order++) {
1833 check_split_1(xa, 0, 1833 check_split_1(xa, 0, order, new_order);
1834 check_split_1(xa, 1UL 1834 check_split_1(xa, 1UL << order, order, new_order);
1835 check_split_1(xa, 3UL 1835 check_split_1(xa, 3UL << order, order, new_order);
1836 } 1836 }
1837 } 1837 }
1838 } 1838 }
1839 #else 1839 #else
1840 static void check_split(struct xarray *xa) { 1840 static void check_split(struct xarray *xa) { }
1841 #endif 1841 #endif
1842 1842
1843 static void check_align_1(struct xarray *xa, 1843 static void check_align_1(struct xarray *xa, char *name)
1844 { 1844 {
1845 int i; 1845 int i;
1846 unsigned int id; 1846 unsigned int id;
1847 unsigned long index; 1847 unsigned long index;
1848 void *entry; 1848 void *entry;
1849 1849
1850 for (i = 0; i < 8; i++) { 1850 for (i = 0; i < 8; i++) {
1851 XA_BUG_ON(xa, xa_alloc(xa, &i 1851 XA_BUG_ON(xa, xa_alloc(xa, &id, name + i, xa_limit_32b,
1852 GFP_K 1852 GFP_KERNEL) != 0);
1853 XA_BUG_ON(xa, id != i); 1853 XA_BUG_ON(xa, id != i);
1854 } 1854 }
1855 xa_for_each(xa, index, entry) 1855 xa_for_each(xa, index, entry)
1856 XA_BUG_ON(xa, xa_is_err(entry 1856 XA_BUG_ON(xa, xa_is_err(entry));
1857 xa_destroy(xa); 1857 xa_destroy(xa);
1858 } 1858 }
1859 1859
1860 /* 1860 /*
1861 * We should always be able to store without 1861 * We should always be able to store without allocating memory after
1862 * reserving a slot. 1862 * reserving a slot.
1863 */ 1863 */
1864 static void check_align_2(struct xarray *xa, 1864 static void check_align_2(struct xarray *xa, char *name)
1865 { 1865 {
1866 int i; 1866 int i;
1867 1867
1868 XA_BUG_ON(xa, !xa_empty(xa)); 1868 XA_BUG_ON(xa, !xa_empty(xa));
1869 1869
1870 for (i = 0; i < 8; i++) { 1870 for (i = 0; i < 8; i++) {
1871 XA_BUG_ON(xa, xa_store(xa, 0, 1871 XA_BUG_ON(xa, xa_store(xa, 0, name + i, GFP_KERNEL) != NULL);
1872 xa_erase(xa, 0); 1872 xa_erase(xa, 0);
1873 } 1873 }
1874 1874
1875 for (i = 0; i < 8; i++) { 1875 for (i = 0; i < 8; i++) {
1876 XA_BUG_ON(xa, xa_reserve(xa, 1876 XA_BUG_ON(xa, xa_reserve(xa, 0, GFP_KERNEL) != 0);
1877 XA_BUG_ON(xa, xa_store(xa, 0, 1877 XA_BUG_ON(xa, xa_store(xa, 0, name + i, 0) != NULL);
1878 xa_erase(xa, 0); 1878 xa_erase(xa, 0);
1879 } 1879 }
1880 1880
1881 XA_BUG_ON(xa, !xa_empty(xa)); 1881 XA_BUG_ON(xa, !xa_empty(xa));
1882 } 1882 }
1883 1883
1884 static noinline void check_align(struct xarra 1884 static noinline void check_align(struct xarray *xa)
1885 { 1885 {
1886 char name[] = "Motorola 68000"; 1886 char name[] = "Motorola 68000";
1887 1887
1888 check_align_1(xa, name); 1888 check_align_1(xa, name);
1889 check_align_1(xa, name + 1); 1889 check_align_1(xa, name + 1);
1890 check_align_1(xa, name + 2); 1890 check_align_1(xa, name + 2);
1891 check_align_1(xa, name + 3); 1891 check_align_1(xa, name + 3);
1892 check_align_2(xa, name); 1892 check_align_2(xa, name);
1893 } 1893 }
1894 1894
1895 static LIST_HEAD(shadow_nodes); 1895 static LIST_HEAD(shadow_nodes);
1896 1896
1897 static void test_update_node(struct xa_node * 1897 static void test_update_node(struct xa_node *node)
1898 { 1898 {
1899 if (node->count && node->count == nod 1899 if (node->count && node->count == node->nr_values) {
1900 if (list_empty(&node->private 1900 if (list_empty(&node->private_list))
1901 list_add(&shadow_node 1901 list_add(&shadow_nodes, &node->private_list);
1902 } else { 1902 } else {
1903 if (!list_empty(&node->privat 1903 if (!list_empty(&node->private_list))
1904 list_del_init(&node-> 1904 list_del_init(&node->private_list);
1905 } 1905 }
1906 } 1906 }
1907 1907
1908 static noinline void shadow_remove(struct xar 1908 static noinline void shadow_remove(struct xarray *xa)
1909 { 1909 {
1910 struct xa_node *node; 1910 struct xa_node *node;
1911 1911
1912 xa_lock(xa); 1912 xa_lock(xa);
1913 while ((node = list_first_entry_or_nu 1913 while ((node = list_first_entry_or_null(&shadow_nodes,
1914 struc 1914 struct xa_node, private_list))) {
1915 XA_BUG_ON(xa, node->array != 1915 XA_BUG_ON(xa, node->array != xa);
1916 list_del_init(&node->private_ 1916 list_del_init(&node->private_list);
1917 xa_delete_node(node, test_upd 1917 xa_delete_node(node, test_update_node);
1918 } 1918 }
1919 xa_unlock(xa); 1919 xa_unlock(xa);
1920 } 1920 }
1921 1921
1922 static noinline void check_workingset(struct 1922 static noinline void check_workingset(struct xarray *xa, unsigned long index)
1923 { 1923 {
1924 XA_STATE(xas, xa, index); 1924 XA_STATE(xas, xa, index);
1925 xas_set_update(&xas, test_update_node 1925 xas_set_update(&xas, test_update_node);
1926 1926
1927 do { 1927 do {
1928 xas_lock(&xas); 1928 xas_lock(&xas);
1929 xas_store(&xas, xa_mk_value(0 1929 xas_store(&xas, xa_mk_value(0));
1930 xas_next(&xas); 1930 xas_next(&xas);
1931 xas_store(&xas, xa_mk_value(1 1931 xas_store(&xas, xa_mk_value(1));
1932 xas_unlock(&xas); 1932 xas_unlock(&xas);
1933 } while (xas_nomem(&xas, GFP_KERNEL)) 1933 } while (xas_nomem(&xas, GFP_KERNEL));
1934 1934
1935 XA_BUG_ON(xa, list_empty(&shadow_node 1935 XA_BUG_ON(xa, list_empty(&shadow_nodes));
1936 1936
1937 xas_lock(&xas); 1937 xas_lock(&xas);
1938 xas_next(&xas); 1938 xas_next(&xas);
1939 xas_store(&xas, &xas); 1939 xas_store(&xas, &xas);
1940 XA_BUG_ON(xa, !list_empty(&shadow_nod 1940 XA_BUG_ON(xa, !list_empty(&shadow_nodes));
1941 1941
1942 xas_store(&xas, xa_mk_value(2)); 1942 xas_store(&xas, xa_mk_value(2));
1943 xas_unlock(&xas); 1943 xas_unlock(&xas);
1944 XA_BUG_ON(xa, list_empty(&shadow_node 1944 XA_BUG_ON(xa, list_empty(&shadow_nodes));
1945 1945
1946 shadow_remove(xa); 1946 shadow_remove(xa);
1947 XA_BUG_ON(xa, !list_empty(&shadow_nod 1947 XA_BUG_ON(xa, !list_empty(&shadow_nodes));
1948 XA_BUG_ON(xa, !xa_empty(xa)); 1948 XA_BUG_ON(xa, !xa_empty(xa));
1949 } 1949 }
1950 1950
1951 /* 1951 /*
1952 * Check that the pointer / value / sibling e 1952 * Check that the pointer / value / sibling entries are accounted the
1953 * way we expect them to be. 1953 * way we expect them to be.
1954 */ 1954 */
1955 static noinline void check_account(struct xar 1955 static noinline void check_account(struct xarray *xa)
1956 { 1956 {
1957 #ifdef CONFIG_XARRAY_MULTI 1957 #ifdef CONFIG_XARRAY_MULTI
1958 unsigned int order; 1958 unsigned int order;
1959 1959
1960 for (order = 1; order < 12; order++) 1960 for (order = 1; order < 12; order++) {
1961 XA_STATE(xas, xa, 1 << order) 1961 XA_STATE(xas, xa, 1 << order);
1962 1962
1963 xa_store_order(xa, 0, order, 1963 xa_store_order(xa, 0, order, xa, GFP_KERNEL);
1964 rcu_read_lock(); 1964 rcu_read_lock();
1965 xas_load(&xas); 1965 xas_load(&xas);
1966 XA_BUG_ON(xa, xas.xa_node->co 1966 XA_BUG_ON(xa, xas.xa_node->count == 0);
1967 XA_BUG_ON(xa, xas.xa_node->co 1967 XA_BUG_ON(xa, xas.xa_node->count > (1 << order));
1968 XA_BUG_ON(xa, xas.xa_node->nr 1968 XA_BUG_ON(xa, xas.xa_node->nr_values != 0);
1969 rcu_read_unlock(); 1969 rcu_read_unlock();
1970 1970
1971 xa_store_order(xa, 1 << order 1971 xa_store_order(xa, 1 << order, order, xa_mk_index(1UL << order),
1972 GFP_KERNEL); 1972 GFP_KERNEL);
1973 XA_BUG_ON(xa, xas.xa_node->co 1973 XA_BUG_ON(xa, xas.xa_node->count != xas.xa_node->nr_values * 2);
1974 1974
1975 xa_erase(xa, 1 << order); 1975 xa_erase(xa, 1 << order);
1976 XA_BUG_ON(xa, xas.xa_node->nr 1976 XA_BUG_ON(xa, xas.xa_node->nr_values != 0);
1977 1977
1978 xa_erase(xa, 0); 1978 xa_erase(xa, 0);
1979 XA_BUG_ON(xa, !xa_empty(xa)); 1979 XA_BUG_ON(xa, !xa_empty(xa));
1980 } 1980 }
1981 #endif 1981 #endif
1982 } 1982 }
1983 1983
1984 static noinline void check_get_order(struct x 1984 static noinline void check_get_order(struct xarray *xa)
1985 { 1985 {
1986 unsigned int max_order = IS_ENABLED(C 1986 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 20 : 1;
1987 unsigned int order; 1987 unsigned int order;
1988 unsigned long i, j; 1988 unsigned long i, j;
1989 1989
1990 for (i = 0; i < 3; i++) 1990 for (i = 0; i < 3; i++)
1991 XA_BUG_ON(xa, xa_get_order(xa 1991 XA_BUG_ON(xa, xa_get_order(xa, i) != 0);
1992 1992
1993 for (order = 0; order < max_order; or 1993 for (order = 0; order < max_order; order++) {
1994 for (i = 0; i < 10; i++) { 1994 for (i = 0; i < 10; i++) {
1995 xa_store_order(xa, i 1995 xa_store_order(xa, i << order, order,
1996 xa_mk 1996 xa_mk_index(i << order), GFP_KERNEL);
1997 for (j = i << order; 1997 for (j = i << order; j < (i + 1) << order; j++)
1998 XA_BUG_ON(xa, 1998 XA_BUG_ON(xa, xa_get_order(xa, j) != order);
1999 xa_erase(xa, i << ord 1999 xa_erase(xa, i << order);
2000 } 2000 }
2001 } 2001 }
2002 } 2002 }
2003 2003
2004 static noinline void check_xas_get_order(stru 2004 static noinline void check_xas_get_order(struct xarray *xa)
2005 { 2005 {
2006 XA_STATE(xas, xa, 0); 2006 XA_STATE(xas, xa, 0);
2007 2007
2008 unsigned int max_order = IS_ENABLED(C 2008 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 20 : 1;
2009 unsigned int order; 2009 unsigned int order;
2010 unsigned long i, j; 2010 unsigned long i, j;
2011 2011
2012 for (order = 0; order < max_order; or 2012 for (order = 0; order < max_order; order++) {
2013 for (i = 0; i < 10; i++) { 2013 for (i = 0; i < 10; i++) {
2014 xas_set_order(&xas, i 2014 xas_set_order(&xas, i << order, order);
2015 do { 2015 do {
2016 xas_lock(&xas 2016 xas_lock(&xas);
2017 xas_store(&xa 2017 xas_store(&xas, xa_mk_value(i));
2018 xas_unlock(&x 2018 xas_unlock(&xas);
2019 } while (xas_nomem(&x 2019 } while (xas_nomem(&xas, GFP_KERNEL));
2020 2020
2021 for (j = i << order; 2021 for (j = i << order; j < (i + 1) << order; j++) {
2022 xas_set_order 2022 xas_set_order(&xas, j, 0);
2023 rcu_read_lock 2023 rcu_read_lock();
2024 xas_load(&xas 2024 xas_load(&xas);
2025 XA_BUG_ON(xa, 2025 XA_BUG_ON(xa, xas_get_order(&xas) != order);
2026 rcu_read_unlo 2026 rcu_read_unlock();
2027 } 2027 }
2028 2028
2029 xas_lock(&xas); 2029 xas_lock(&xas);
2030 xas_set_order(&xas, i 2030 xas_set_order(&xas, i << order, order);
2031 xas_store(&xas, NULL) 2031 xas_store(&xas, NULL);
2032 xas_unlock(&xas); 2032 xas_unlock(&xas);
2033 } 2033 }
2034 } 2034 }
2035 } 2035 }
2036 2036
2037 static noinline void check_xas_conflict_get_o 2037 static noinline void check_xas_conflict_get_order(struct xarray *xa)
2038 { 2038 {
2039 XA_STATE(xas, xa, 0); 2039 XA_STATE(xas, xa, 0);
2040 2040
2041 void *entry; 2041 void *entry;
2042 int only_once; 2042 int only_once;
2043 unsigned int max_order = IS_ENABLED(C 2043 unsigned int max_order = IS_ENABLED(CONFIG_XARRAY_MULTI) ? 20 : 1;
2044 unsigned int order; 2044 unsigned int order;
2045 unsigned long i, j, k; 2045 unsigned long i, j, k;
2046 2046
2047 for (order = 0; order < max_order; or 2047 for (order = 0; order < max_order; order++) {
2048 for (i = 0; i < 10; i++) { 2048 for (i = 0; i < 10; i++) {
2049 xas_set_order(&xas, i 2049 xas_set_order(&xas, i << order, order);
2050 do { 2050 do {
2051 xas_lock(&xas 2051 xas_lock(&xas);
2052 xas_store(&xa 2052 xas_store(&xas, xa_mk_value(i));
2053 xas_unlock(&x 2053 xas_unlock(&xas);
2054 } while (xas_nomem(&x 2054 } while (xas_nomem(&xas, GFP_KERNEL));
2055 2055
2056 /* 2056 /*
2057 * Ensure xas_get_ord 2057 * Ensure xas_get_order works with xas_for_each_conflict.
2058 */ 2058 */
2059 j = i << order; 2059 j = i << order;
2060 for (k = 0; k < order 2060 for (k = 0; k < order; k++) {
2061 only_once = 0 2061 only_once = 0;
2062 xas_set_order 2062 xas_set_order(&xas, j + (1 << k), k);
2063 xas_lock(&xas 2063 xas_lock(&xas);
2064 xas_for_each_ 2064 xas_for_each_conflict(&xas, entry) {
2065 XA_BU 2065 XA_BUG_ON(xa, entry != xa_mk_value(i));
2066 XA_BU 2066 XA_BUG_ON(xa, xas_get_order(&xas) != order);
2067 only_ 2067 only_once++;
2068 } 2068 }
2069 XA_BUG_ON(xa, 2069 XA_BUG_ON(xa, only_once != 1);
2070 xas_unlock(&x 2070 xas_unlock(&xas);
2071 } 2071 }
2072 2072
2073 if (order < max_order 2073 if (order < max_order - 1) {
2074 only_once = 0 2074 only_once = 0;
2075 xas_set_order 2075 xas_set_order(&xas, (i & ~1UL) << order, order + 1);
2076 xas_lock(&xas 2076 xas_lock(&xas);
2077 xas_for_each_ 2077 xas_for_each_conflict(&xas, entry) {
2078 XA_BU 2078 XA_BUG_ON(xa, entry != xa_mk_value(i));
2079 XA_BU 2079 XA_BUG_ON(xa, xas_get_order(&xas) != order);
2080 only_ 2080 only_once++;
2081 } 2081 }
2082 XA_BUG_ON(xa, 2082 XA_BUG_ON(xa, only_once != 1);
2083 xas_unlock(&x 2083 xas_unlock(&xas);
2084 } 2084 }
2085 2085
2086 xas_set_order(&xas, i 2086 xas_set_order(&xas, i << order, order);
2087 xas_lock(&xas); 2087 xas_lock(&xas);
2088 xas_store(&xas, NULL) 2088 xas_store(&xas, NULL);
2089 xas_unlock(&xas); 2089 xas_unlock(&xas);
2090 } 2090 }
2091 } 2091 }
2092 } 2092 }
2093 2093
2094 2094
2095 static noinline void check_destroy(struct xar 2095 static noinline void check_destroy(struct xarray *xa)
2096 { 2096 {
2097 unsigned long index; 2097 unsigned long index;
2098 2098
2099 XA_BUG_ON(xa, !xa_empty(xa)); 2099 XA_BUG_ON(xa, !xa_empty(xa));
2100 2100
2101 /* Destroying an empty array is a no- 2101 /* Destroying an empty array is a no-op */
2102 xa_destroy(xa); 2102 xa_destroy(xa);
2103 XA_BUG_ON(xa, !xa_empty(xa)); 2103 XA_BUG_ON(xa, !xa_empty(xa));
2104 2104
2105 /* Destroying an array with a single 2105 /* Destroying an array with a single entry */
2106 for (index = 0; index < 1000; index++ 2106 for (index = 0; index < 1000; index++) {
2107 xa_store_index(xa, index, GFP 2107 xa_store_index(xa, index, GFP_KERNEL);
2108 XA_BUG_ON(xa, xa_empty(xa)); 2108 XA_BUG_ON(xa, xa_empty(xa));
2109 xa_destroy(xa); 2109 xa_destroy(xa);
2110 XA_BUG_ON(xa, !xa_empty(xa)); 2110 XA_BUG_ON(xa, !xa_empty(xa));
2111 } 2111 }
2112 2112
2113 /* Destroying an array with a single 2113 /* Destroying an array with a single entry at ULONG_MAX */
2114 xa_store(xa, ULONG_MAX, xa, GFP_KERNE 2114 xa_store(xa, ULONG_MAX, xa, GFP_KERNEL);
2115 XA_BUG_ON(xa, xa_empty(xa)); 2115 XA_BUG_ON(xa, xa_empty(xa));
2116 xa_destroy(xa); 2116 xa_destroy(xa);
2117 XA_BUG_ON(xa, !xa_empty(xa)); 2117 XA_BUG_ON(xa, !xa_empty(xa));
2118 2118
2119 #ifdef CONFIG_XARRAY_MULTI 2119 #ifdef CONFIG_XARRAY_MULTI
2120 /* Destroying an array with a multi-i 2120 /* Destroying an array with a multi-index entry */
2121 xa_store_order(xa, 1 << 11, 11, xa, G 2121 xa_store_order(xa, 1 << 11, 11, xa, GFP_KERNEL);
2122 XA_BUG_ON(xa, xa_empty(xa)); 2122 XA_BUG_ON(xa, xa_empty(xa));
2123 xa_destroy(xa); 2123 xa_destroy(xa);
2124 XA_BUG_ON(xa, !xa_empty(xa)); 2124 XA_BUG_ON(xa, !xa_empty(xa));
2125 #endif 2125 #endif
2126 } 2126 }
2127 2127
2128 static DEFINE_XARRAY(array); 2128 static DEFINE_XARRAY(array);
2129 2129
2130 static int xarray_checks(void) 2130 static int xarray_checks(void)
2131 { 2131 {
2132 check_xa_err(&array); 2132 check_xa_err(&array);
2133 check_xas_retry(&array); 2133 check_xas_retry(&array);
2134 check_xa_load(&array); 2134 check_xa_load(&array);
2135 check_xa_mark(&array); 2135 check_xa_mark(&array);
2136 check_xa_shrink(&array); 2136 check_xa_shrink(&array);
2137 check_xas_erase(&array); 2137 check_xas_erase(&array);
2138 check_insert(&array); 2138 check_insert(&array);
2139 check_cmpxchg(&array); 2139 check_cmpxchg(&array);
2140 check_cmpxchg_order(&array); 2140 check_cmpxchg_order(&array);
2141 check_reserve(&array); 2141 check_reserve(&array);
2142 check_reserve(&xa0); 2142 check_reserve(&xa0);
2143 check_multi_store(&array); 2143 check_multi_store(&array);
2144 check_multi_store_advanced(&array); 2144 check_multi_store_advanced(&array);
2145 check_get_order(&array); 2145 check_get_order(&array);
2146 check_xas_get_order(&array); 2146 check_xas_get_order(&array);
2147 check_xas_conflict_get_order(&array); 2147 check_xas_conflict_get_order(&array);
2148 check_xa_alloc(); 2148 check_xa_alloc();
2149 check_find(&array); 2149 check_find(&array);
2150 check_find_entry(&array); 2150 check_find_entry(&array);
2151 check_pause(&array); 2151 check_pause(&array);
2152 check_account(&array); 2152 check_account(&array);
2153 check_destroy(&array); 2153 check_destroy(&array);
2154 check_move(&array); 2154 check_move(&array);
2155 check_create_range(&array); 2155 check_create_range(&array);
2156 check_store_range(&array); 2156 check_store_range(&array);
2157 check_store_iter(&array); 2157 check_store_iter(&array);
2158 check_align(&xa0); 2158 check_align(&xa0);
2159 check_split(&array); 2159 check_split(&array);
2160 2160
2161 check_workingset(&array, 0); 2161 check_workingset(&array, 0);
2162 check_workingset(&array, 64); 2162 check_workingset(&array, 64);
2163 check_workingset(&array, 4096); 2163 check_workingset(&array, 4096);
2164 2164
2165 printk("XArray: %u of %u tests passed 2165 printk("XArray: %u of %u tests passed\n", tests_passed, tests_run);
2166 return (tests_run == tests_passed) ? 2166 return (tests_run == tests_passed) ? 0 : -EINVAL;
2167 } 2167 }
2168 2168
2169 static void xarray_exit(void) 2169 static void xarray_exit(void)
2170 { 2170 {
2171 } 2171 }
2172 2172
2173 module_init(xarray_checks); 2173 module_init(xarray_checks);
2174 module_exit(xarray_exit); 2174 module_exit(xarray_exit);
2175 MODULE_AUTHOR("Matthew Wilcox <willy@infradea 2175 MODULE_AUTHOR("Matthew Wilcox <willy@infradead.org>");
2176 MODULE_DESCRIPTION("XArray API test module"); <<
2177 MODULE_LICENSE("GPL"); 2176 MODULE_LICENSE("GPL");
2178 2177
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