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c8e7b4d0 SP |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * DAMON sysfs Interface | |
4 | * | |
5 | * Copyright (c) 2022 SeongJae Park <sj@kernel.org> | |
6 | */ | |
7 | ||
8 | #include <linux/slab.h> | |
9 | ||
10 | #include "sysfs-common.h" | |
11 | ||
9277d036 SP |
12 | /* |
13 | * scheme region directory | |
14 | */ | |
15 | ||
16 | struct damon_sysfs_scheme_region { | |
17 | struct kobject kobj; | |
18 | struct damon_addr_range ar; | |
19 | unsigned int nr_accesses; | |
20 | unsigned int age; | |
21 | struct list_head list; | |
22 | }; | |
23 | ||
24 | static struct damon_sysfs_scheme_region *damon_sysfs_scheme_region_alloc( | |
25 | struct damon_region *region) | |
26 | { | |
27 | struct damon_sysfs_scheme_region *sysfs_region = kmalloc( | |
28 | sizeof(*sysfs_region), GFP_KERNEL); | |
29 | ||
30 | if (!sysfs_region) | |
31 | return NULL; | |
32 | sysfs_region->kobj = (struct kobject){}; | |
33 | sysfs_region->ar = region->ar; | |
e7639bb4 | 34 | sysfs_region->nr_accesses = region->nr_accesses_bp / 10000; |
9277d036 SP |
35 | sysfs_region->age = region->age; |
36 | INIT_LIST_HEAD(&sysfs_region->list); | |
37 | return sysfs_region; | |
38 | } | |
39 | ||
40 | static ssize_t start_show(struct kobject *kobj, struct kobj_attribute *attr, | |
41 | char *buf) | |
42 | { | |
43 | struct damon_sysfs_scheme_region *region = container_of(kobj, | |
44 | struct damon_sysfs_scheme_region, kobj); | |
45 | ||
46 | return sysfs_emit(buf, "%lu\n", region->ar.start); | |
47 | } | |
48 | ||
49 | static ssize_t end_show(struct kobject *kobj, struct kobj_attribute *attr, | |
50 | char *buf) | |
51 | { | |
52 | struct damon_sysfs_scheme_region *region = container_of(kobj, | |
53 | struct damon_sysfs_scheme_region, kobj); | |
54 | ||
55 | return sysfs_emit(buf, "%lu\n", region->ar.end); | |
56 | } | |
57 | ||
58 | static ssize_t nr_accesses_show(struct kobject *kobj, | |
59 | struct kobj_attribute *attr, char *buf) | |
60 | { | |
61 | struct damon_sysfs_scheme_region *region = container_of(kobj, | |
62 | struct damon_sysfs_scheme_region, kobj); | |
63 | ||
64 | return sysfs_emit(buf, "%u\n", region->nr_accesses); | |
65 | } | |
66 | ||
67 | static ssize_t age_show(struct kobject *kobj, struct kobj_attribute *attr, | |
68 | char *buf) | |
69 | { | |
70 | struct damon_sysfs_scheme_region *region = container_of(kobj, | |
71 | struct damon_sysfs_scheme_region, kobj); | |
72 | ||
73 | return sysfs_emit(buf, "%u\n", region->age); | |
74 | } | |
75 | ||
76 | static void damon_sysfs_scheme_region_release(struct kobject *kobj) | |
77 | { | |
78 | struct damon_sysfs_scheme_region *region = container_of(kobj, | |
79 | struct damon_sysfs_scheme_region, kobj); | |
80 | ||
81 | list_del(®ion->list); | |
82 | kfree(region); | |
83 | } | |
84 | ||
85 | static struct kobj_attribute damon_sysfs_scheme_region_start_attr = | |
86 | __ATTR_RO_MODE(start, 0400); | |
87 | ||
88 | static struct kobj_attribute damon_sysfs_scheme_region_end_attr = | |
89 | __ATTR_RO_MODE(end, 0400); | |
90 | ||
91 | static struct kobj_attribute damon_sysfs_scheme_region_nr_accesses_attr = | |
92 | __ATTR_RO_MODE(nr_accesses, 0400); | |
93 | ||
94 | static struct kobj_attribute damon_sysfs_scheme_region_age_attr = | |
95 | __ATTR_RO_MODE(age, 0400); | |
96 | ||
97 | static struct attribute *damon_sysfs_scheme_region_attrs[] = { | |
98 | &damon_sysfs_scheme_region_start_attr.attr, | |
99 | &damon_sysfs_scheme_region_end_attr.attr, | |
100 | &damon_sysfs_scheme_region_nr_accesses_attr.attr, | |
101 | &damon_sysfs_scheme_region_age_attr.attr, | |
102 | NULL, | |
103 | }; | |
104 | ATTRIBUTE_GROUPS(damon_sysfs_scheme_region); | |
105 | ||
e56397e8 | 106 | static const struct kobj_type damon_sysfs_scheme_region_ktype = { |
9277d036 SP |
107 | .release = damon_sysfs_scheme_region_release, |
108 | .sysfs_ops = &kobj_sysfs_ops, | |
109 | .default_groups = damon_sysfs_scheme_region_groups, | |
110 | }; | |
111 | ||
5181b75f SP |
112 | /* |
113 | * scheme regions directory | |
114 | */ | |
115 | ||
4d4e41b6 SP |
116 | /* |
117 | * enum damos_sysfs_regions_upd_status - Represent DAMOS tried regions update | |
118 | * status | |
119 | * @DAMOS_TRIED_REGIONS_UPD_IDLE: Waiting for next request. | |
120 | * @DAMOS_TRIED_REGIONS_UPD_STARTED: Update started. | |
121 | * @DAMOS_TRIED_REGIONS_UPD_FINISHED: Update finished. | |
122 | * | |
123 | * Each DAMON-based operation scheme (&struct damos) has its own apply | |
124 | * interval, and we need to expose the scheme tried regions based on only | |
125 | * single snapshot. For this, we keep the tried regions update status for each | |
126 | * scheme. The status becomes 'idle' at the beginning. | |
127 | * | |
128 | * Once the tried regions update request is received, the request handling | |
129 | * start function (damon_sysfs_scheme_update_regions_start()) sets the status | |
130 | * of all schemes as 'idle' again, and register ->before_damos_apply() and | |
131 | * ->after_sampling() callbacks. | |
132 | * | |
133 | * Then, the first followup ->before_damos_apply() callback | |
134 | * (damon_sysfs_before_damos_apply()) sets the status 'started'. The first | |
135 | * ->after_sampling() callback (damon_sysfs_after_sampling()) after the call | |
136 | * is called only after the scheme is completely applied | |
137 | * to the given snapshot. Hence the callback knows the situation by showing | |
138 | * 'started' status, and sets the status as 'finished'. Then, | |
139 | * damon_sysfs_before_damos_apply() understands the situation by showing the | |
140 | * 'finished' status and do nothing. | |
141 | * | |
7d6fa31a SP |
142 | * If DAMOS is not applied to any region due to any reasons including the |
143 | * access pattern, the watermarks, the quotas, and the filters, | |
144 | * ->before_damos_apply() will not be called back. Until the situation is | |
145 | * changed, the update will not be finished. To avoid this, | |
146 | * damon_sysfs_after_sampling() set the status as 'finished' if more than two | |
147 | * apply intervals of the scheme is passed while the state is 'idle'. | |
148 | * | |
4d4e41b6 SP |
149 | * Finally, the tried regions request handling finisher function |
150 | * (damon_sysfs_schemes_update_regions_stop()) unregisters the callbacks. | |
151 | */ | |
152 | enum damos_sysfs_regions_upd_status { | |
153 | DAMOS_TRIED_REGIONS_UPD_IDLE, | |
154 | DAMOS_TRIED_REGIONS_UPD_STARTED, | |
155 | DAMOS_TRIED_REGIONS_UPD_FINISHED, | |
156 | }; | |
157 | ||
5181b75f SP |
158 | struct damon_sysfs_scheme_regions { |
159 | struct kobject kobj; | |
9277d036 SP |
160 | struct list_head regions_list; |
161 | int nr_regions; | |
b69f92a7 | 162 | unsigned long total_bytes; |
4d4e41b6 | 163 | enum damos_sysfs_regions_upd_status upd_status; |
7d6fa31a | 164 | unsigned long upd_timeout_jiffies; |
5181b75f SP |
165 | }; |
166 | ||
167 | static struct damon_sysfs_scheme_regions * | |
168 | damon_sysfs_scheme_regions_alloc(void) | |
169 | { | |
9277d036 SP |
170 | struct damon_sysfs_scheme_regions *regions = kmalloc(sizeof(*regions), |
171 | GFP_KERNEL); | |
172 | ||
84055688 SP |
173 | if (!regions) |
174 | return NULL; | |
175 | ||
9277d036 SP |
176 | regions->kobj = (struct kobject){}; |
177 | INIT_LIST_HEAD(®ions->regions_list); | |
178 | regions->nr_regions = 0; | |
b69f92a7 | 179 | regions->total_bytes = 0; |
4d4e41b6 | 180 | regions->upd_status = DAMOS_TRIED_REGIONS_UPD_IDLE; |
9277d036 SP |
181 | return regions; |
182 | } | |
183 | ||
b69f92a7 SP |
184 | static ssize_t total_bytes_show(struct kobject *kobj, |
185 | struct kobj_attribute *attr, char *buf) | |
186 | { | |
187 | struct damon_sysfs_scheme_regions *regions = container_of(kobj, | |
188 | struct damon_sysfs_scheme_regions, kobj); | |
189 | ||
190 | return sysfs_emit(buf, "%lu\n", regions->total_bytes); | |
191 | } | |
192 | ||
9277d036 SP |
193 | static void damon_sysfs_scheme_regions_rm_dirs( |
194 | struct damon_sysfs_scheme_regions *regions) | |
195 | { | |
196 | struct damon_sysfs_scheme_region *r, *next; | |
197 | ||
198 | list_for_each_entry_safe(r, next, ®ions->regions_list, list) { | |
199 | /* release function deletes it from the list */ | |
200 | kobject_put(&r->kobj); | |
201 | regions->nr_regions--; | |
202 | } | |
5181b75f SP |
203 | } |
204 | ||
205 | static void damon_sysfs_scheme_regions_release(struct kobject *kobj) | |
206 | { | |
207 | kfree(container_of(kobj, struct damon_sysfs_scheme_regions, kobj)); | |
208 | } | |
209 | ||
b69f92a7 SP |
210 | static struct kobj_attribute damon_sysfs_scheme_regions_total_bytes_attr = |
211 | __ATTR_RO_MODE(total_bytes, 0400); | |
212 | ||
5181b75f | 213 | static struct attribute *damon_sysfs_scheme_regions_attrs[] = { |
b69f92a7 | 214 | &damon_sysfs_scheme_regions_total_bytes_attr.attr, |
5181b75f SP |
215 | NULL, |
216 | }; | |
217 | ATTRIBUTE_GROUPS(damon_sysfs_scheme_regions); | |
218 | ||
e56397e8 | 219 | static const struct kobj_type damon_sysfs_scheme_regions_ktype = { |
5181b75f SP |
220 | .release = damon_sysfs_scheme_regions_release, |
221 | .sysfs_ops = &kobj_sysfs_ops, | |
222 | .default_groups = damon_sysfs_scheme_regions_groups, | |
223 | }; | |
224 | ||
c8e7b4d0 SP |
225 | /* |
226 | * schemes/stats directory | |
227 | */ | |
228 | ||
229 | struct damon_sysfs_stats { | |
230 | struct kobject kobj; | |
231 | unsigned long nr_tried; | |
232 | unsigned long sz_tried; | |
233 | unsigned long nr_applied; | |
234 | unsigned long sz_applied; | |
235 | unsigned long qt_exceeds; | |
236 | }; | |
237 | ||
238 | static struct damon_sysfs_stats *damon_sysfs_stats_alloc(void) | |
239 | { | |
240 | return kzalloc(sizeof(struct damon_sysfs_stats), GFP_KERNEL); | |
241 | } | |
242 | ||
243 | static ssize_t nr_tried_show(struct kobject *kobj, struct kobj_attribute *attr, | |
244 | char *buf) | |
245 | { | |
246 | struct damon_sysfs_stats *stats = container_of(kobj, | |
247 | struct damon_sysfs_stats, kobj); | |
248 | ||
249 | return sysfs_emit(buf, "%lu\n", stats->nr_tried); | |
250 | } | |
251 | ||
252 | static ssize_t sz_tried_show(struct kobject *kobj, struct kobj_attribute *attr, | |
253 | char *buf) | |
254 | { | |
255 | struct damon_sysfs_stats *stats = container_of(kobj, | |
256 | struct damon_sysfs_stats, kobj); | |
257 | ||
258 | return sysfs_emit(buf, "%lu\n", stats->sz_tried); | |
259 | } | |
260 | ||
261 | static ssize_t nr_applied_show(struct kobject *kobj, | |
262 | struct kobj_attribute *attr, char *buf) | |
263 | { | |
264 | struct damon_sysfs_stats *stats = container_of(kobj, | |
265 | struct damon_sysfs_stats, kobj); | |
266 | ||
267 | return sysfs_emit(buf, "%lu\n", stats->nr_applied); | |
268 | } | |
269 | ||
270 | static ssize_t sz_applied_show(struct kobject *kobj, | |
271 | struct kobj_attribute *attr, char *buf) | |
272 | { | |
273 | struct damon_sysfs_stats *stats = container_of(kobj, | |
274 | struct damon_sysfs_stats, kobj); | |
275 | ||
276 | return sysfs_emit(buf, "%lu\n", stats->sz_applied); | |
277 | } | |
278 | ||
279 | static ssize_t qt_exceeds_show(struct kobject *kobj, | |
280 | struct kobj_attribute *attr, char *buf) | |
281 | { | |
282 | struct damon_sysfs_stats *stats = container_of(kobj, | |
283 | struct damon_sysfs_stats, kobj); | |
284 | ||
285 | return sysfs_emit(buf, "%lu\n", stats->qt_exceeds); | |
286 | } | |
287 | ||
288 | static void damon_sysfs_stats_release(struct kobject *kobj) | |
289 | { | |
290 | kfree(container_of(kobj, struct damon_sysfs_stats, kobj)); | |
291 | } | |
292 | ||
293 | static struct kobj_attribute damon_sysfs_stats_nr_tried_attr = | |
294 | __ATTR_RO_MODE(nr_tried, 0400); | |
295 | ||
296 | static struct kobj_attribute damon_sysfs_stats_sz_tried_attr = | |
297 | __ATTR_RO_MODE(sz_tried, 0400); | |
298 | ||
299 | static struct kobj_attribute damon_sysfs_stats_nr_applied_attr = | |
300 | __ATTR_RO_MODE(nr_applied, 0400); | |
301 | ||
302 | static struct kobj_attribute damon_sysfs_stats_sz_applied_attr = | |
303 | __ATTR_RO_MODE(sz_applied, 0400); | |
304 | ||
305 | static struct kobj_attribute damon_sysfs_stats_qt_exceeds_attr = | |
306 | __ATTR_RO_MODE(qt_exceeds, 0400); | |
307 | ||
308 | static struct attribute *damon_sysfs_stats_attrs[] = { | |
309 | &damon_sysfs_stats_nr_tried_attr.attr, | |
310 | &damon_sysfs_stats_sz_tried_attr.attr, | |
311 | &damon_sysfs_stats_nr_applied_attr.attr, | |
312 | &damon_sysfs_stats_sz_applied_attr.attr, | |
313 | &damon_sysfs_stats_qt_exceeds_attr.attr, | |
314 | NULL, | |
315 | }; | |
316 | ATTRIBUTE_GROUPS(damon_sysfs_stats); | |
317 | ||
e56397e8 | 318 | static const struct kobj_type damon_sysfs_stats_ktype = { |
c8e7b4d0 SP |
319 | .release = damon_sysfs_stats_release, |
320 | .sysfs_ops = &kobj_sysfs_ops, | |
321 | .default_groups = damon_sysfs_stats_groups, | |
322 | }; | |
323 | ||
7ee161f1 SP |
324 | /* |
325 | * filter directory | |
326 | */ | |
327 | ||
328 | struct damon_sysfs_scheme_filter { | |
329 | struct kobject kobj; | |
330 | enum damos_filter_type type; | |
331 | bool matching; | |
332 | char *memcg_path; | |
2f1abcfc | 333 | struct damon_addr_range addr_range; |
9f6e47ab | 334 | int target_idx; |
7ee161f1 SP |
335 | }; |
336 | ||
472e2b70 SP |
337 | static struct damon_sysfs_scheme_filter *damon_sysfs_scheme_filter_alloc(void) |
338 | { | |
339 | return kzalloc(sizeof(struct damon_sysfs_scheme_filter), GFP_KERNEL); | |
340 | } | |
341 | ||
7ee161f1 SP |
342 | /* Should match with enum damos_filter_type */ |
343 | static const char * const damon_sysfs_scheme_filter_type_strs[] = { | |
344 | "anon", | |
345 | "memcg", | |
2f1abcfc | 346 | "addr", |
9f6e47ab | 347 | "target", |
7ee161f1 SP |
348 | }; |
349 | ||
350 | static ssize_t type_show(struct kobject *kobj, | |
351 | struct kobj_attribute *attr, char *buf) | |
352 | { | |
353 | struct damon_sysfs_scheme_filter *filter = container_of(kobj, | |
354 | struct damon_sysfs_scheme_filter, kobj); | |
355 | ||
356 | return sysfs_emit(buf, "%s\n", | |
357 | damon_sysfs_scheme_filter_type_strs[filter->type]); | |
358 | } | |
359 | ||
360 | static ssize_t type_store(struct kobject *kobj, | |
361 | struct kobj_attribute *attr, const char *buf, size_t count) | |
362 | { | |
363 | struct damon_sysfs_scheme_filter *filter = container_of(kobj, | |
364 | struct damon_sysfs_scheme_filter, kobj); | |
365 | enum damos_filter_type type; | |
366 | ssize_t ret = -EINVAL; | |
367 | ||
368 | for (type = 0; type < NR_DAMOS_FILTER_TYPES; type++) { | |
369 | if (sysfs_streq(buf, damon_sysfs_scheme_filter_type_strs[ | |
370 | type])) { | |
371 | filter->type = type; | |
372 | ret = count; | |
373 | break; | |
374 | } | |
375 | } | |
376 | return ret; | |
377 | } | |
378 | ||
379 | static ssize_t matching_show(struct kobject *kobj, | |
380 | struct kobj_attribute *attr, char *buf) | |
381 | { | |
382 | struct damon_sysfs_scheme_filter *filter = container_of(kobj, | |
383 | struct damon_sysfs_scheme_filter, kobj); | |
384 | ||
385 | return sysfs_emit(buf, "%c\n", filter->matching ? 'Y' : 'N'); | |
386 | } | |
387 | ||
388 | static ssize_t matching_store(struct kobject *kobj, | |
389 | struct kobj_attribute *attr, const char *buf, size_t count) | |
390 | { | |
391 | struct damon_sysfs_scheme_filter *filter = container_of(kobj, | |
392 | struct damon_sysfs_scheme_filter, kobj); | |
393 | bool matching; | |
394 | int err = kstrtobool(buf, &matching); | |
395 | ||
396 | if (err) | |
397 | return err; | |
398 | ||
399 | filter->matching = matching; | |
400 | return count; | |
401 | } | |
402 | ||
403 | static ssize_t memcg_path_show(struct kobject *kobj, | |
404 | struct kobj_attribute *attr, char *buf) | |
405 | { | |
406 | struct damon_sysfs_scheme_filter *filter = container_of(kobj, | |
407 | struct damon_sysfs_scheme_filter, kobj); | |
408 | ||
409 | return sysfs_emit(buf, "%s\n", | |
410 | filter->memcg_path ? filter->memcg_path : ""); | |
411 | } | |
412 | ||
413 | static ssize_t memcg_path_store(struct kobject *kobj, | |
414 | struct kobj_attribute *attr, const char *buf, size_t count) | |
415 | { | |
416 | struct damon_sysfs_scheme_filter *filter = container_of(kobj, | |
417 | struct damon_sysfs_scheme_filter, kobj); | |
418 | char *path = kmalloc(sizeof(*path) * (count + 1), GFP_KERNEL); | |
419 | ||
420 | if (!path) | |
421 | return -ENOMEM; | |
422 | ||
b6f00c91 | 423 | strscpy(path, buf, count + 1); |
7ee161f1 SP |
424 | filter->memcg_path = path; |
425 | return count; | |
426 | } | |
427 | ||
2f1abcfc SP |
428 | static ssize_t addr_start_show(struct kobject *kobj, |
429 | struct kobj_attribute *attr, char *buf) | |
430 | { | |
431 | struct damon_sysfs_scheme_filter *filter = container_of(kobj, | |
432 | struct damon_sysfs_scheme_filter, kobj); | |
433 | ||
434 | return sysfs_emit(buf, "%lu\n", filter->addr_range.start); | |
435 | } | |
436 | ||
437 | static ssize_t addr_start_store(struct kobject *kobj, | |
438 | struct kobj_attribute *attr, const char *buf, size_t count) | |
439 | { | |
440 | struct damon_sysfs_scheme_filter *filter = container_of(kobj, | |
441 | struct damon_sysfs_scheme_filter, kobj); | |
442 | int err = kstrtoul(buf, 0, &filter->addr_range.start); | |
443 | ||
444 | return err ? err : count; | |
445 | } | |
446 | ||
447 | static ssize_t addr_end_show(struct kobject *kobj, | |
448 | struct kobj_attribute *attr, char *buf) | |
449 | { | |
450 | struct damon_sysfs_scheme_filter *filter = container_of(kobj, | |
451 | struct damon_sysfs_scheme_filter, kobj); | |
452 | ||
453 | return sysfs_emit(buf, "%lu\n", filter->addr_range.end); | |
454 | } | |
455 | ||
456 | static ssize_t addr_end_store(struct kobject *kobj, | |
457 | struct kobj_attribute *attr, const char *buf, size_t count) | |
458 | { | |
459 | struct damon_sysfs_scheme_filter *filter = container_of(kobj, | |
460 | struct damon_sysfs_scheme_filter, kobj); | |
461 | int err = kstrtoul(buf, 0, &filter->addr_range.end); | |
462 | ||
463 | return err ? err : count; | |
464 | } | |
465 | ||
9f6e47ab SP |
466 | static ssize_t damon_target_idx_show(struct kobject *kobj, |
467 | struct kobj_attribute *attr, char *buf) | |
468 | { | |
469 | struct damon_sysfs_scheme_filter *filter = container_of(kobj, | |
470 | struct damon_sysfs_scheme_filter, kobj); | |
471 | ||
472 | return sysfs_emit(buf, "%d\n", filter->target_idx); | |
473 | } | |
474 | ||
475 | static ssize_t damon_target_idx_store(struct kobject *kobj, | |
476 | struct kobj_attribute *attr, const char *buf, size_t count) | |
477 | { | |
478 | struct damon_sysfs_scheme_filter *filter = container_of(kobj, | |
479 | struct damon_sysfs_scheme_filter, kobj); | |
480 | int err = kstrtoint(buf, 0, &filter->target_idx); | |
481 | ||
482 | return err ? err : count; | |
483 | } | |
484 | ||
7ee161f1 SP |
485 | static void damon_sysfs_scheme_filter_release(struct kobject *kobj) |
486 | { | |
487 | struct damon_sysfs_scheme_filter *filter = container_of(kobj, | |
488 | struct damon_sysfs_scheme_filter, kobj); | |
489 | ||
490 | kfree(filter->memcg_path); | |
491 | kfree(filter); | |
492 | } | |
493 | ||
494 | static struct kobj_attribute damon_sysfs_scheme_filter_type_attr = | |
495 | __ATTR_RW_MODE(type, 0600); | |
496 | ||
497 | static struct kobj_attribute damon_sysfs_scheme_filter_matching_attr = | |
498 | __ATTR_RW_MODE(matching, 0600); | |
499 | ||
500 | static struct kobj_attribute damon_sysfs_scheme_filter_memcg_path_attr = | |
501 | __ATTR_RW_MODE(memcg_path, 0600); | |
502 | ||
2f1abcfc SP |
503 | static struct kobj_attribute damon_sysfs_scheme_filter_addr_start_attr = |
504 | __ATTR_RW_MODE(addr_start, 0600); | |
505 | ||
506 | static struct kobj_attribute damon_sysfs_scheme_filter_addr_end_attr = | |
507 | __ATTR_RW_MODE(addr_end, 0600); | |
508 | ||
9f6e47ab SP |
509 | static struct kobj_attribute damon_sysfs_scheme_filter_damon_target_idx_attr = |
510 | __ATTR_RW_MODE(damon_target_idx, 0600); | |
511 | ||
7ee161f1 SP |
512 | static struct attribute *damon_sysfs_scheme_filter_attrs[] = { |
513 | &damon_sysfs_scheme_filter_type_attr.attr, | |
514 | &damon_sysfs_scheme_filter_matching_attr.attr, | |
515 | &damon_sysfs_scheme_filter_memcg_path_attr.attr, | |
2f1abcfc SP |
516 | &damon_sysfs_scheme_filter_addr_start_attr.attr, |
517 | &damon_sysfs_scheme_filter_addr_end_attr.attr, | |
9f6e47ab | 518 | &damon_sysfs_scheme_filter_damon_target_idx_attr.attr, |
7ee161f1 SP |
519 | NULL, |
520 | }; | |
521 | ATTRIBUTE_GROUPS(damon_sysfs_scheme_filter); | |
522 | ||
02cd4eb8 | 523 | static const struct kobj_type damon_sysfs_scheme_filter_ktype = { |
7ee161f1 SP |
524 | .release = damon_sysfs_scheme_filter_release, |
525 | .sysfs_ops = &kobj_sysfs_ops, | |
526 | .default_groups = damon_sysfs_scheme_filter_groups, | |
527 | }; | |
528 | ||
ac35264b SP |
529 | /* |
530 | * filters directory | |
531 | */ | |
532 | ||
533 | struct damon_sysfs_scheme_filters { | |
534 | struct kobject kobj; | |
472e2b70 | 535 | struct damon_sysfs_scheme_filter **filters_arr; |
ac35264b SP |
536 | int nr; |
537 | }; | |
538 | ||
539 | static struct damon_sysfs_scheme_filters * | |
540 | damon_sysfs_scheme_filters_alloc(void) | |
541 | { | |
542 | return kzalloc(sizeof(struct damon_sysfs_scheme_filters), GFP_KERNEL); | |
543 | } | |
544 | ||
472e2b70 SP |
545 | static void damon_sysfs_scheme_filters_rm_dirs( |
546 | struct damon_sysfs_scheme_filters *filters) | |
547 | { | |
548 | struct damon_sysfs_scheme_filter **filters_arr = filters->filters_arr; | |
549 | int i; | |
550 | ||
551 | for (i = 0; i < filters->nr; i++) | |
552 | kobject_put(&filters_arr[i]->kobj); | |
553 | filters->nr = 0; | |
554 | kfree(filters_arr); | |
555 | filters->filters_arr = NULL; | |
556 | } | |
557 | ||
558 | static int damon_sysfs_scheme_filters_add_dirs( | |
559 | struct damon_sysfs_scheme_filters *filters, int nr_filters) | |
560 | { | |
561 | struct damon_sysfs_scheme_filter **filters_arr, *filter; | |
562 | int err, i; | |
563 | ||
564 | damon_sysfs_scheme_filters_rm_dirs(filters); | |
565 | if (!nr_filters) | |
566 | return 0; | |
567 | ||
568 | filters_arr = kmalloc_array(nr_filters, sizeof(*filters_arr), | |
569 | GFP_KERNEL | __GFP_NOWARN); | |
570 | if (!filters_arr) | |
571 | return -ENOMEM; | |
572 | filters->filters_arr = filters_arr; | |
573 | ||
574 | for (i = 0; i < nr_filters; i++) { | |
575 | filter = damon_sysfs_scheme_filter_alloc(); | |
576 | if (!filter) { | |
577 | damon_sysfs_scheme_filters_rm_dirs(filters); | |
578 | return -ENOMEM; | |
579 | } | |
580 | ||
581 | err = kobject_init_and_add(&filter->kobj, | |
582 | &damon_sysfs_scheme_filter_ktype, | |
583 | &filters->kobj, "%d", i); | |
584 | if (err) { | |
585 | kobject_put(&filter->kobj); | |
586 | damon_sysfs_scheme_filters_rm_dirs(filters); | |
587 | return err; | |
588 | } | |
589 | ||
590 | filters_arr[i] = filter; | |
591 | filters->nr++; | |
592 | } | |
593 | return 0; | |
594 | } | |
595 | ||
ac35264b SP |
596 | static ssize_t nr_filters_show(struct kobject *kobj, |
597 | struct kobj_attribute *attr, char *buf) | |
598 | { | |
599 | struct damon_sysfs_scheme_filters *filters = container_of(kobj, | |
600 | struct damon_sysfs_scheme_filters, kobj); | |
601 | ||
602 | return sysfs_emit(buf, "%d\n", filters->nr); | |
603 | } | |
604 | ||
605 | static ssize_t nr_filters_store(struct kobject *kobj, | |
606 | struct kobj_attribute *attr, const char *buf, size_t count) | |
607 | { | |
472e2b70 | 608 | struct damon_sysfs_scheme_filters *filters; |
ac35264b SP |
609 | int nr, err = kstrtoint(buf, 0, &nr); |
610 | ||
611 | if (err) | |
612 | return err; | |
613 | if (nr < 0) | |
614 | return -EINVAL; | |
615 | ||
472e2b70 SP |
616 | filters = container_of(kobj, struct damon_sysfs_scheme_filters, kobj); |
617 | ||
618 | if (!mutex_trylock(&damon_sysfs_lock)) | |
619 | return -EBUSY; | |
620 | err = damon_sysfs_scheme_filters_add_dirs(filters, nr); | |
621 | mutex_unlock(&damon_sysfs_lock); | |
622 | if (err) | |
623 | return err; | |
624 | ||
ac35264b SP |
625 | return count; |
626 | } | |
627 | ||
628 | static void damon_sysfs_scheme_filters_release(struct kobject *kobj) | |
629 | { | |
630 | kfree(container_of(kobj, struct damon_sysfs_scheme_filters, kobj)); | |
631 | } | |
632 | ||
633 | static struct kobj_attribute damon_sysfs_scheme_filters_nr_attr = | |
634 | __ATTR_RW_MODE(nr_filters, 0600); | |
635 | ||
636 | static struct attribute *damon_sysfs_scheme_filters_attrs[] = { | |
637 | &damon_sysfs_scheme_filters_nr_attr.attr, | |
638 | NULL, | |
639 | }; | |
640 | ATTRIBUTE_GROUPS(damon_sysfs_scheme_filters); | |
641 | ||
02cd4eb8 | 642 | static const struct kobj_type damon_sysfs_scheme_filters_ktype = { |
ac35264b SP |
643 | .release = damon_sysfs_scheme_filters_release, |
644 | .sysfs_ops = &kobj_sysfs_ops, | |
645 | .default_groups = damon_sysfs_scheme_filters_groups, | |
646 | }; | |
647 | ||
c8e7b4d0 SP |
648 | /* |
649 | * watermarks directory | |
650 | */ | |
651 | ||
652 | struct damon_sysfs_watermarks { | |
653 | struct kobject kobj; | |
654 | enum damos_wmark_metric metric; | |
655 | unsigned long interval_us; | |
656 | unsigned long high; | |
657 | unsigned long mid; | |
658 | unsigned long low; | |
659 | }; | |
660 | ||
661 | static struct damon_sysfs_watermarks *damon_sysfs_watermarks_alloc( | |
662 | enum damos_wmark_metric metric, unsigned long interval_us, | |
663 | unsigned long high, unsigned long mid, unsigned long low) | |
664 | { | |
665 | struct damon_sysfs_watermarks *watermarks = kmalloc( | |
666 | sizeof(*watermarks), GFP_KERNEL); | |
667 | ||
668 | if (!watermarks) | |
669 | return NULL; | |
670 | watermarks->kobj = (struct kobject){}; | |
671 | watermarks->metric = metric; | |
672 | watermarks->interval_us = interval_us; | |
673 | watermarks->high = high; | |
674 | watermarks->mid = mid; | |
675 | watermarks->low = low; | |
676 | return watermarks; | |
677 | } | |
678 | ||
679 | /* Should match with enum damos_wmark_metric */ | |
680 | static const char * const damon_sysfs_wmark_metric_strs[] = { | |
681 | "none", | |
682 | "free_mem_rate", | |
683 | }; | |
684 | ||
685 | static ssize_t metric_show(struct kobject *kobj, struct kobj_attribute *attr, | |
686 | char *buf) | |
687 | { | |
688 | struct damon_sysfs_watermarks *watermarks = container_of(kobj, | |
689 | struct damon_sysfs_watermarks, kobj); | |
690 | ||
691 | return sysfs_emit(buf, "%s\n", | |
692 | damon_sysfs_wmark_metric_strs[watermarks->metric]); | |
693 | } | |
694 | ||
695 | static ssize_t metric_store(struct kobject *kobj, struct kobj_attribute *attr, | |
696 | const char *buf, size_t count) | |
697 | { | |
698 | struct damon_sysfs_watermarks *watermarks = container_of(kobj, | |
699 | struct damon_sysfs_watermarks, kobj); | |
700 | enum damos_wmark_metric metric; | |
701 | ||
702 | for (metric = 0; metric < NR_DAMOS_WMARK_METRICS; metric++) { | |
703 | if (sysfs_streq(buf, damon_sysfs_wmark_metric_strs[metric])) { | |
704 | watermarks->metric = metric; | |
705 | return count; | |
706 | } | |
707 | } | |
708 | return -EINVAL; | |
709 | } | |
710 | ||
711 | static ssize_t interval_us_show(struct kobject *kobj, | |
712 | struct kobj_attribute *attr, char *buf) | |
713 | { | |
714 | struct damon_sysfs_watermarks *watermarks = container_of(kobj, | |
715 | struct damon_sysfs_watermarks, kobj); | |
716 | ||
717 | return sysfs_emit(buf, "%lu\n", watermarks->interval_us); | |
718 | } | |
719 | ||
720 | static ssize_t interval_us_store(struct kobject *kobj, | |
721 | struct kobj_attribute *attr, const char *buf, size_t count) | |
722 | { | |
723 | struct damon_sysfs_watermarks *watermarks = container_of(kobj, | |
724 | struct damon_sysfs_watermarks, kobj); | |
725 | int err = kstrtoul(buf, 0, &watermarks->interval_us); | |
726 | ||
727 | return err ? err : count; | |
728 | } | |
729 | ||
730 | static ssize_t high_show(struct kobject *kobj, | |
731 | struct kobj_attribute *attr, char *buf) | |
732 | { | |
733 | struct damon_sysfs_watermarks *watermarks = container_of(kobj, | |
734 | struct damon_sysfs_watermarks, kobj); | |
735 | ||
736 | return sysfs_emit(buf, "%lu\n", watermarks->high); | |
737 | } | |
738 | ||
739 | static ssize_t high_store(struct kobject *kobj, | |
740 | struct kobj_attribute *attr, const char *buf, size_t count) | |
741 | { | |
742 | struct damon_sysfs_watermarks *watermarks = container_of(kobj, | |
743 | struct damon_sysfs_watermarks, kobj); | |
744 | int err = kstrtoul(buf, 0, &watermarks->high); | |
745 | ||
746 | return err ? err : count; | |
747 | } | |
748 | ||
749 | static ssize_t mid_show(struct kobject *kobj, | |
750 | struct kobj_attribute *attr, char *buf) | |
751 | { | |
752 | struct damon_sysfs_watermarks *watermarks = container_of(kobj, | |
753 | struct damon_sysfs_watermarks, kobj); | |
754 | ||
755 | return sysfs_emit(buf, "%lu\n", watermarks->mid); | |
756 | } | |
757 | ||
758 | static ssize_t mid_store(struct kobject *kobj, | |
759 | struct kobj_attribute *attr, const char *buf, size_t count) | |
760 | { | |
761 | struct damon_sysfs_watermarks *watermarks = container_of(kobj, | |
762 | struct damon_sysfs_watermarks, kobj); | |
763 | int err = kstrtoul(buf, 0, &watermarks->mid); | |
764 | ||
765 | return err ? err : count; | |
766 | } | |
767 | ||
768 | static ssize_t low_show(struct kobject *kobj, | |
769 | struct kobj_attribute *attr, char *buf) | |
770 | { | |
771 | struct damon_sysfs_watermarks *watermarks = container_of(kobj, | |
772 | struct damon_sysfs_watermarks, kobj); | |
773 | ||
774 | return sysfs_emit(buf, "%lu\n", watermarks->low); | |
775 | } | |
776 | ||
777 | static ssize_t low_store(struct kobject *kobj, | |
778 | struct kobj_attribute *attr, const char *buf, size_t count) | |
779 | { | |
780 | struct damon_sysfs_watermarks *watermarks = container_of(kobj, | |
781 | struct damon_sysfs_watermarks, kobj); | |
782 | int err = kstrtoul(buf, 0, &watermarks->low); | |
783 | ||
784 | return err ? err : count; | |
785 | } | |
786 | ||
787 | static void damon_sysfs_watermarks_release(struct kobject *kobj) | |
788 | { | |
789 | kfree(container_of(kobj, struct damon_sysfs_watermarks, kobj)); | |
790 | } | |
791 | ||
792 | static struct kobj_attribute damon_sysfs_watermarks_metric_attr = | |
793 | __ATTR_RW_MODE(metric, 0600); | |
794 | ||
795 | static struct kobj_attribute damon_sysfs_watermarks_interval_us_attr = | |
796 | __ATTR_RW_MODE(interval_us, 0600); | |
797 | ||
798 | static struct kobj_attribute damon_sysfs_watermarks_high_attr = | |
799 | __ATTR_RW_MODE(high, 0600); | |
800 | ||
801 | static struct kobj_attribute damon_sysfs_watermarks_mid_attr = | |
802 | __ATTR_RW_MODE(mid, 0600); | |
803 | ||
804 | static struct kobj_attribute damon_sysfs_watermarks_low_attr = | |
805 | __ATTR_RW_MODE(low, 0600); | |
806 | ||
807 | static struct attribute *damon_sysfs_watermarks_attrs[] = { | |
808 | &damon_sysfs_watermarks_metric_attr.attr, | |
809 | &damon_sysfs_watermarks_interval_us_attr.attr, | |
810 | &damon_sysfs_watermarks_high_attr.attr, | |
811 | &damon_sysfs_watermarks_mid_attr.attr, | |
812 | &damon_sysfs_watermarks_low_attr.attr, | |
813 | NULL, | |
814 | }; | |
815 | ATTRIBUTE_GROUPS(damon_sysfs_watermarks); | |
816 | ||
e56397e8 | 817 | static const struct kobj_type damon_sysfs_watermarks_ktype = { |
c8e7b4d0 SP |
818 | .release = damon_sysfs_watermarks_release, |
819 | .sysfs_ops = &kobj_sysfs_ops, | |
820 | .default_groups = damon_sysfs_watermarks_groups, | |
821 | }; | |
822 | ||
823 | /* | |
824 | * scheme/weights directory | |
825 | */ | |
826 | ||
827 | struct damon_sysfs_weights { | |
828 | struct kobject kobj; | |
829 | unsigned int sz; | |
830 | unsigned int nr_accesses; | |
831 | unsigned int age; | |
832 | }; | |
833 | ||
834 | static struct damon_sysfs_weights *damon_sysfs_weights_alloc(unsigned int sz, | |
835 | unsigned int nr_accesses, unsigned int age) | |
836 | { | |
837 | struct damon_sysfs_weights *weights = kmalloc(sizeof(*weights), | |
838 | GFP_KERNEL); | |
839 | ||
840 | if (!weights) | |
841 | return NULL; | |
842 | weights->kobj = (struct kobject){}; | |
843 | weights->sz = sz; | |
844 | weights->nr_accesses = nr_accesses; | |
845 | weights->age = age; | |
846 | return weights; | |
847 | } | |
848 | ||
849 | static ssize_t sz_permil_show(struct kobject *kobj, | |
850 | struct kobj_attribute *attr, char *buf) | |
851 | { | |
852 | struct damon_sysfs_weights *weights = container_of(kobj, | |
853 | struct damon_sysfs_weights, kobj); | |
854 | ||
855 | return sysfs_emit(buf, "%u\n", weights->sz); | |
856 | } | |
857 | ||
858 | static ssize_t sz_permil_store(struct kobject *kobj, | |
859 | struct kobj_attribute *attr, const char *buf, size_t count) | |
860 | { | |
861 | struct damon_sysfs_weights *weights = container_of(kobj, | |
862 | struct damon_sysfs_weights, kobj); | |
863 | int err = kstrtouint(buf, 0, &weights->sz); | |
864 | ||
865 | return err ? err : count; | |
866 | } | |
867 | ||
868 | static ssize_t nr_accesses_permil_show(struct kobject *kobj, | |
869 | struct kobj_attribute *attr, char *buf) | |
870 | { | |
871 | struct damon_sysfs_weights *weights = container_of(kobj, | |
872 | struct damon_sysfs_weights, kobj); | |
873 | ||
874 | return sysfs_emit(buf, "%u\n", weights->nr_accesses); | |
875 | } | |
876 | ||
877 | static ssize_t nr_accesses_permil_store(struct kobject *kobj, | |
878 | struct kobj_attribute *attr, const char *buf, size_t count) | |
879 | { | |
880 | struct damon_sysfs_weights *weights = container_of(kobj, | |
881 | struct damon_sysfs_weights, kobj); | |
882 | int err = kstrtouint(buf, 0, &weights->nr_accesses); | |
883 | ||
884 | return err ? err : count; | |
885 | } | |
886 | ||
887 | static ssize_t age_permil_show(struct kobject *kobj, | |
888 | struct kobj_attribute *attr, char *buf) | |
889 | { | |
890 | struct damon_sysfs_weights *weights = container_of(kobj, | |
891 | struct damon_sysfs_weights, kobj); | |
892 | ||
893 | return sysfs_emit(buf, "%u\n", weights->age); | |
894 | } | |
895 | ||
896 | static ssize_t age_permil_store(struct kobject *kobj, | |
897 | struct kobj_attribute *attr, const char *buf, size_t count) | |
898 | { | |
899 | struct damon_sysfs_weights *weights = container_of(kobj, | |
900 | struct damon_sysfs_weights, kobj); | |
901 | int err = kstrtouint(buf, 0, &weights->age); | |
902 | ||
903 | return err ? err : count; | |
904 | } | |
905 | ||
906 | static void damon_sysfs_weights_release(struct kobject *kobj) | |
907 | { | |
908 | kfree(container_of(kobj, struct damon_sysfs_weights, kobj)); | |
909 | } | |
910 | ||
911 | static struct kobj_attribute damon_sysfs_weights_sz_attr = | |
912 | __ATTR_RW_MODE(sz_permil, 0600); | |
913 | ||
914 | static struct kobj_attribute damon_sysfs_weights_nr_accesses_attr = | |
915 | __ATTR_RW_MODE(nr_accesses_permil, 0600); | |
916 | ||
917 | static struct kobj_attribute damon_sysfs_weights_age_attr = | |
918 | __ATTR_RW_MODE(age_permil, 0600); | |
919 | ||
920 | static struct attribute *damon_sysfs_weights_attrs[] = { | |
921 | &damon_sysfs_weights_sz_attr.attr, | |
922 | &damon_sysfs_weights_nr_accesses_attr.attr, | |
923 | &damon_sysfs_weights_age_attr.attr, | |
924 | NULL, | |
925 | }; | |
926 | ATTRIBUTE_GROUPS(damon_sysfs_weights); | |
927 | ||
e56397e8 | 928 | static const struct kobj_type damon_sysfs_weights_ktype = { |
c8e7b4d0 SP |
929 | .release = damon_sysfs_weights_release, |
930 | .sysfs_ops = &kobj_sysfs_ops, | |
931 | .default_groups = damon_sysfs_weights_groups, | |
932 | }; | |
933 | ||
934 | /* | |
935 | * quotas directory | |
936 | */ | |
937 | ||
938 | struct damon_sysfs_quotas { | |
939 | struct kobject kobj; | |
940 | struct damon_sysfs_weights *weights; | |
941 | unsigned long ms; | |
942 | unsigned long sz; | |
943 | unsigned long reset_interval_ms; | |
944 | }; | |
945 | ||
946 | static struct damon_sysfs_quotas *damon_sysfs_quotas_alloc(void) | |
947 | { | |
948 | return kzalloc(sizeof(struct damon_sysfs_quotas), GFP_KERNEL); | |
949 | } | |
950 | ||
951 | static int damon_sysfs_quotas_add_dirs(struct damon_sysfs_quotas *quotas) | |
952 | { | |
953 | struct damon_sysfs_weights *weights; | |
954 | int err; | |
955 | ||
956 | weights = damon_sysfs_weights_alloc(0, 0, 0); | |
957 | if (!weights) | |
958 | return -ENOMEM; | |
959 | ||
960 | err = kobject_init_and_add(&weights->kobj, &damon_sysfs_weights_ktype, | |
961 | "as->kobj, "weights"); | |
962 | if (err) | |
963 | kobject_put(&weights->kobj); | |
964 | else | |
965 | quotas->weights = weights; | |
966 | return err; | |
967 | } | |
968 | ||
969 | static void damon_sysfs_quotas_rm_dirs(struct damon_sysfs_quotas *quotas) | |
970 | { | |
971 | kobject_put("as->weights->kobj); | |
972 | } | |
973 | ||
974 | static ssize_t ms_show(struct kobject *kobj, struct kobj_attribute *attr, | |
975 | char *buf) | |
976 | { | |
977 | struct damon_sysfs_quotas *quotas = container_of(kobj, | |
978 | struct damon_sysfs_quotas, kobj); | |
979 | ||
980 | return sysfs_emit(buf, "%lu\n", quotas->ms); | |
981 | } | |
982 | ||
983 | static ssize_t ms_store(struct kobject *kobj, struct kobj_attribute *attr, | |
984 | const char *buf, size_t count) | |
985 | { | |
986 | struct damon_sysfs_quotas *quotas = container_of(kobj, | |
987 | struct damon_sysfs_quotas, kobj); | |
988 | int err = kstrtoul(buf, 0, "as->ms); | |
989 | ||
990 | if (err) | |
991 | return -EINVAL; | |
992 | return count; | |
993 | } | |
994 | ||
995 | static ssize_t bytes_show(struct kobject *kobj, struct kobj_attribute *attr, | |
996 | char *buf) | |
997 | { | |
998 | struct damon_sysfs_quotas *quotas = container_of(kobj, | |
999 | struct damon_sysfs_quotas, kobj); | |
1000 | ||
1001 | return sysfs_emit(buf, "%lu\n", quotas->sz); | |
1002 | } | |
1003 | ||
1004 | static ssize_t bytes_store(struct kobject *kobj, | |
1005 | struct kobj_attribute *attr, const char *buf, size_t count) | |
1006 | { | |
1007 | struct damon_sysfs_quotas *quotas = container_of(kobj, | |
1008 | struct damon_sysfs_quotas, kobj); | |
1009 | int err = kstrtoul(buf, 0, "as->sz); | |
1010 | ||
1011 | if (err) | |
1012 | return -EINVAL; | |
1013 | return count; | |
1014 | } | |
1015 | ||
1016 | static ssize_t reset_interval_ms_show(struct kobject *kobj, | |
1017 | struct kobj_attribute *attr, char *buf) | |
1018 | { | |
1019 | struct damon_sysfs_quotas *quotas = container_of(kobj, | |
1020 | struct damon_sysfs_quotas, kobj); | |
1021 | ||
1022 | return sysfs_emit(buf, "%lu\n", quotas->reset_interval_ms); | |
1023 | } | |
1024 | ||
1025 | static ssize_t reset_interval_ms_store(struct kobject *kobj, | |
1026 | struct kobj_attribute *attr, const char *buf, size_t count) | |
1027 | { | |
1028 | struct damon_sysfs_quotas *quotas = container_of(kobj, | |
1029 | struct damon_sysfs_quotas, kobj); | |
1030 | int err = kstrtoul(buf, 0, "as->reset_interval_ms); | |
1031 | ||
1032 | if (err) | |
1033 | return -EINVAL; | |
1034 | return count; | |
1035 | } | |
1036 | ||
1037 | static void damon_sysfs_quotas_release(struct kobject *kobj) | |
1038 | { | |
1039 | kfree(container_of(kobj, struct damon_sysfs_quotas, kobj)); | |
1040 | } | |
1041 | ||
1042 | static struct kobj_attribute damon_sysfs_quotas_ms_attr = | |
1043 | __ATTR_RW_MODE(ms, 0600); | |
1044 | ||
1045 | static struct kobj_attribute damon_sysfs_quotas_sz_attr = | |
1046 | __ATTR_RW_MODE(bytes, 0600); | |
1047 | ||
1048 | static struct kobj_attribute damon_sysfs_quotas_reset_interval_ms_attr = | |
1049 | __ATTR_RW_MODE(reset_interval_ms, 0600); | |
1050 | ||
1051 | static struct attribute *damon_sysfs_quotas_attrs[] = { | |
1052 | &damon_sysfs_quotas_ms_attr.attr, | |
1053 | &damon_sysfs_quotas_sz_attr.attr, | |
1054 | &damon_sysfs_quotas_reset_interval_ms_attr.attr, | |
1055 | NULL, | |
1056 | }; | |
1057 | ATTRIBUTE_GROUPS(damon_sysfs_quotas); | |
1058 | ||
e56397e8 | 1059 | static const struct kobj_type damon_sysfs_quotas_ktype = { |
c8e7b4d0 SP |
1060 | .release = damon_sysfs_quotas_release, |
1061 | .sysfs_ops = &kobj_sysfs_ops, | |
1062 | .default_groups = damon_sysfs_quotas_groups, | |
1063 | }; | |
1064 | ||
1065 | /* | |
1066 | * access_pattern directory | |
1067 | */ | |
1068 | ||
1069 | struct damon_sysfs_access_pattern { | |
1070 | struct kobject kobj; | |
1071 | struct damon_sysfs_ul_range *sz; | |
1072 | struct damon_sysfs_ul_range *nr_accesses; | |
1073 | struct damon_sysfs_ul_range *age; | |
1074 | }; | |
1075 | ||
1076 | static | |
1077 | struct damon_sysfs_access_pattern *damon_sysfs_access_pattern_alloc(void) | |
1078 | { | |
1079 | struct damon_sysfs_access_pattern *access_pattern = | |
1080 | kmalloc(sizeof(*access_pattern), GFP_KERNEL); | |
1081 | ||
1082 | if (!access_pattern) | |
1083 | return NULL; | |
1084 | access_pattern->kobj = (struct kobject){}; | |
1085 | return access_pattern; | |
1086 | } | |
1087 | ||
1088 | static int damon_sysfs_access_pattern_add_range_dir( | |
1089 | struct damon_sysfs_access_pattern *access_pattern, | |
1090 | struct damon_sysfs_ul_range **range_dir_ptr, | |
1091 | char *name) | |
1092 | { | |
1093 | struct damon_sysfs_ul_range *range = damon_sysfs_ul_range_alloc(0, 0); | |
1094 | int err; | |
1095 | ||
1096 | if (!range) | |
1097 | return -ENOMEM; | |
1098 | err = kobject_init_and_add(&range->kobj, &damon_sysfs_ul_range_ktype, | |
1099 | &access_pattern->kobj, name); | |
1100 | if (err) | |
1101 | kobject_put(&range->kobj); | |
1102 | else | |
1103 | *range_dir_ptr = range; | |
1104 | return err; | |
1105 | } | |
1106 | ||
1107 | static int damon_sysfs_access_pattern_add_dirs( | |
1108 | struct damon_sysfs_access_pattern *access_pattern) | |
1109 | { | |
1110 | int err; | |
1111 | ||
1112 | err = damon_sysfs_access_pattern_add_range_dir(access_pattern, | |
1113 | &access_pattern->sz, "sz"); | |
1114 | if (err) | |
1115 | goto put_sz_out; | |
1116 | ||
1117 | err = damon_sysfs_access_pattern_add_range_dir(access_pattern, | |
1118 | &access_pattern->nr_accesses, "nr_accesses"); | |
1119 | if (err) | |
1120 | goto put_nr_accesses_sz_out; | |
1121 | ||
1122 | err = damon_sysfs_access_pattern_add_range_dir(access_pattern, | |
1123 | &access_pattern->age, "age"); | |
1124 | if (err) | |
1125 | goto put_age_nr_accesses_sz_out; | |
1126 | return 0; | |
1127 | ||
1128 | put_age_nr_accesses_sz_out: | |
1129 | kobject_put(&access_pattern->age->kobj); | |
1130 | access_pattern->age = NULL; | |
1131 | put_nr_accesses_sz_out: | |
1132 | kobject_put(&access_pattern->nr_accesses->kobj); | |
1133 | access_pattern->nr_accesses = NULL; | |
1134 | put_sz_out: | |
1135 | kobject_put(&access_pattern->sz->kobj); | |
1136 | access_pattern->sz = NULL; | |
1137 | return err; | |
1138 | } | |
1139 | ||
1140 | static void damon_sysfs_access_pattern_rm_dirs( | |
1141 | struct damon_sysfs_access_pattern *access_pattern) | |
1142 | { | |
1143 | kobject_put(&access_pattern->sz->kobj); | |
1144 | kobject_put(&access_pattern->nr_accesses->kobj); | |
1145 | kobject_put(&access_pattern->age->kobj); | |
1146 | } | |
1147 | ||
1148 | static void damon_sysfs_access_pattern_release(struct kobject *kobj) | |
1149 | { | |
1150 | kfree(container_of(kobj, struct damon_sysfs_access_pattern, kobj)); | |
1151 | } | |
1152 | ||
1153 | static struct attribute *damon_sysfs_access_pattern_attrs[] = { | |
1154 | NULL, | |
1155 | }; | |
1156 | ATTRIBUTE_GROUPS(damon_sysfs_access_pattern); | |
1157 | ||
e56397e8 | 1158 | static const struct kobj_type damon_sysfs_access_pattern_ktype = { |
c8e7b4d0 SP |
1159 | .release = damon_sysfs_access_pattern_release, |
1160 | .sysfs_ops = &kobj_sysfs_ops, | |
1161 | .default_groups = damon_sysfs_access_pattern_groups, | |
1162 | }; | |
1163 | ||
1164 | /* | |
1165 | * scheme directory | |
1166 | */ | |
1167 | ||
1168 | struct damon_sysfs_scheme { | |
1169 | struct kobject kobj; | |
1170 | enum damos_action action; | |
1171 | struct damon_sysfs_access_pattern *access_pattern; | |
a2a9f68e | 1172 | unsigned long apply_interval_us; |
c8e7b4d0 SP |
1173 | struct damon_sysfs_quotas *quotas; |
1174 | struct damon_sysfs_watermarks *watermarks; | |
ac35264b | 1175 | struct damon_sysfs_scheme_filters *filters; |
c8e7b4d0 | 1176 | struct damon_sysfs_stats *stats; |
5181b75f | 1177 | struct damon_sysfs_scheme_regions *tried_regions; |
c8e7b4d0 SP |
1178 | }; |
1179 | ||
1180 | /* This should match with enum damos_action */ | |
1181 | static const char * const damon_sysfs_damos_action_strs[] = { | |
1182 | "willneed", | |
1183 | "cold", | |
1184 | "pageout", | |
1185 | "hugepage", | |
1186 | "nohugepage", | |
1187 | "lru_prio", | |
1188 | "lru_deprio", | |
1189 | "stat", | |
1190 | }; | |
1191 | ||
1192 | static struct damon_sysfs_scheme *damon_sysfs_scheme_alloc( | |
a2a9f68e | 1193 | enum damos_action action, unsigned long apply_interval_us) |
c8e7b4d0 SP |
1194 | { |
1195 | struct damon_sysfs_scheme *scheme = kmalloc(sizeof(*scheme), | |
1196 | GFP_KERNEL); | |
1197 | ||
1198 | if (!scheme) | |
1199 | return NULL; | |
1200 | scheme->kobj = (struct kobject){}; | |
1201 | scheme->action = action; | |
a2a9f68e | 1202 | scheme->apply_interval_us = apply_interval_us; |
c8e7b4d0 SP |
1203 | return scheme; |
1204 | } | |
1205 | ||
1206 | static int damon_sysfs_scheme_set_access_pattern( | |
1207 | struct damon_sysfs_scheme *scheme) | |
1208 | { | |
1209 | struct damon_sysfs_access_pattern *access_pattern; | |
1210 | int err; | |
1211 | ||
1212 | access_pattern = damon_sysfs_access_pattern_alloc(); | |
1213 | if (!access_pattern) | |
1214 | return -ENOMEM; | |
1215 | err = kobject_init_and_add(&access_pattern->kobj, | |
1216 | &damon_sysfs_access_pattern_ktype, &scheme->kobj, | |
1217 | "access_pattern"); | |
1218 | if (err) | |
1219 | goto out; | |
1220 | err = damon_sysfs_access_pattern_add_dirs(access_pattern); | |
1221 | if (err) | |
1222 | goto out; | |
1223 | scheme->access_pattern = access_pattern; | |
1224 | return 0; | |
1225 | ||
1226 | out: | |
1227 | kobject_put(&access_pattern->kobj); | |
1228 | return err; | |
1229 | } | |
1230 | ||
1231 | static int damon_sysfs_scheme_set_quotas(struct damon_sysfs_scheme *scheme) | |
1232 | { | |
1233 | struct damon_sysfs_quotas *quotas = damon_sysfs_quotas_alloc(); | |
1234 | int err; | |
1235 | ||
1236 | if (!quotas) | |
1237 | return -ENOMEM; | |
1238 | err = kobject_init_and_add("as->kobj, &damon_sysfs_quotas_ktype, | |
1239 | &scheme->kobj, "quotas"); | |
1240 | if (err) | |
1241 | goto out; | |
1242 | err = damon_sysfs_quotas_add_dirs(quotas); | |
1243 | if (err) | |
1244 | goto out; | |
1245 | scheme->quotas = quotas; | |
1246 | return 0; | |
1247 | ||
1248 | out: | |
1249 | kobject_put("as->kobj); | |
1250 | return err; | |
1251 | } | |
1252 | ||
1253 | static int damon_sysfs_scheme_set_watermarks(struct damon_sysfs_scheme *scheme) | |
1254 | { | |
1255 | struct damon_sysfs_watermarks *watermarks = | |
1256 | damon_sysfs_watermarks_alloc(DAMOS_WMARK_NONE, 0, 0, 0, 0); | |
1257 | int err; | |
1258 | ||
1259 | if (!watermarks) | |
1260 | return -ENOMEM; | |
1261 | err = kobject_init_and_add(&watermarks->kobj, | |
1262 | &damon_sysfs_watermarks_ktype, &scheme->kobj, | |
1263 | "watermarks"); | |
1264 | if (err) | |
1265 | kobject_put(&watermarks->kobj); | |
1266 | else | |
1267 | scheme->watermarks = watermarks; | |
1268 | return err; | |
1269 | } | |
1270 | ||
ac35264b SP |
1271 | static int damon_sysfs_scheme_set_filters(struct damon_sysfs_scheme *scheme) |
1272 | { | |
1273 | struct damon_sysfs_scheme_filters *filters = | |
1274 | damon_sysfs_scheme_filters_alloc(); | |
1275 | int err; | |
1276 | ||
1277 | if (!filters) | |
1278 | return -ENOMEM; | |
1279 | err = kobject_init_and_add(&filters->kobj, | |
1280 | &damon_sysfs_scheme_filters_ktype, &scheme->kobj, | |
1281 | "filters"); | |
1282 | if (err) | |
1283 | kobject_put(&filters->kobj); | |
1284 | else | |
1285 | scheme->filters = filters; | |
1286 | return err; | |
1287 | } | |
1288 | ||
c8e7b4d0 SP |
1289 | static int damon_sysfs_scheme_set_stats(struct damon_sysfs_scheme *scheme) |
1290 | { | |
1291 | struct damon_sysfs_stats *stats = damon_sysfs_stats_alloc(); | |
1292 | int err; | |
1293 | ||
1294 | if (!stats) | |
1295 | return -ENOMEM; | |
1296 | err = kobject_init_and_add(&stats->kobj, &damon_sysfs_stats_ktype, | |
1297 | &scheme->kobj, "stats"); | |
1298 | if (err) | |
1299 | kobject_put(&stats->kobj); | |
1300 | else | |
1301 | scheme->stats = stats; | |
1302 | return err; | |
1303 | } | |
1304 | ||
5181b75f SP |
1305 | static int damon_sysfs_scheme_set_tried_regions( |
1306 | struct damon_sysfs_scheme *scheme) | |
1307 | { | |
1308 | struct damon_sysfs_scheme_regions *tried_regions = | |
1309 | damon_sysfs_scheme_regions_alloc(); | |
1310 | int err; | |
1311 | ||
1312 | if (!tried_regions) | |
1313 | return -ENOMEM; | |
1314 | err = kobject_init_and_add(&tried_regions->kobj, | |
1315 | &damon_sysfs_scheme_regions_ktype, &scheme->kobj, | |
1316 | "tried_regions"); | |
1317 | if (err) | |
1318 | kobject_put(&tried_regions->kobj); | |
1319 | else | |
1320 | scheme->tried_regions = tried_regions; | |
1321 | return err; | |
1322 | } | |
1323 | ||
c8e7b4d0 SP |
1324 | static int damon_sysfs_scheme_add_dirs(struct damon_sysfs_scheme *scheme) |
1325 | { | |
1326 | int err; | |
1327 | ||
1328 | err = damon_sysfs_scheme_set_access_pattern(scheme); | |
1329 | if (err) | |
1330 | return err; | |
1331 | err = damon_sysfs_scheme_set_quotas(scheme); | |
1332 | if (err) | |
1333 | goto put_access_pattern_out; | |
1334 | err = damon_sysfs_scheme_set_watermarks(scheme); | |
1335 | if (err) | |
1336 | goto put_quotas_access_pattern_out; | |
ac35264b | 1337 | err = damon_sysfs_scheme_set_filters(scheme); |
c8e7b4d0 SP |
1338 | if (err) |
1339 | goto put_watermarks_quotas_access_pattern_out; | |
ac35264b SP |
1340 | err = damon_sysfs_scheme_set_stats(scheme); |
1341 | if (err) | |
1342 | goto put_filters_watermarks_quotas_access_pattern_out; | |
5181b75f SP |
1343 | err = damon_sysfs_scheme_set_tried_regions(scheme); |
1344 | if (err) | |
1345 | goto put_tried_regions_out; | |
c8e7b4d0 SP |
1346 | return 0; |
1347 | ||
5181b75f SP |
1348 | put_tried_regions_out: |
1349 | kobject_put(&scheme->tried_regions->kobj); | |
1350 | scheme->tried_regions = NULL; | |
ac35264b SP |
1351 | put_filters_watermarks_quotas_access_pattern_out: |
1352 | kobject_put(&scheme->filters->kobj); | |
1353 | scheme->filters = NULL; | |
c8e7b4d0 SP |
1354 | put_watermarks_quotas_access_pattern_out: |
1355 | kobject_put(&scheme->watermarks->kobj); | |
1356 | scheme->watermarks = NULL; | |
1357 | put_quotas_access_pattern_out: | |
1358 | kobject_put(&scheme->quotas->kobj); | |
1359 | scheme->quotas = NULL; | |
1360 | put_access_pattern_out: | |
1361 | kobject_put(&scheme->access_pattern->kobj); | |
1362 | scheme->access_pattern = NULL; | |
1363 | return err; | |
1364 | } | |
1365 | ||
1366 | static void damon_sysfs_scheme_rm_dirs(struct damon_sysfs_scheme *scheme) | |
1367 | { | |
1368 | damon_sysfs_access_pattern_rm_dirs(scheme->access_pattern); | |
1369 | kobject_put(&scheme->access_pattern->kobj); | |
1370 | damon_sysfs_quotas_rm_dirs(scheme->quotas); | |
1371 | kobject_put(&scheme->quotas->kobj); | |
1372 | kobject_put(&scheme->watermarks->kobj); | |
472e2b70 | 1373 | damon_sysfs_scheme_filters_rm_dirs(scheme->filters); |
ac35264b | 1374 | kobject_put(&scheme->filters->kobj); |
c8e7b4d0 | 1375 | kobject_put(&scheme->stats->kobj); |
9277d036 | 1376 | damon_sysfs_scheme_regions_rm_dirs(scheme->tried_regions); |
5181b75f | 1377 | kobject_put(&scheme->tried_regions->kobj); |
c8e7b4d0 SP |
1378 | } |
1379 | ||
1380 | static ssize_t action_show(struct kobject *kobj, struct kobj_attribute *attr, | |
1381 | char *buf) | |
1382 | { | |
1383 | struct damon_sysfs_scheme *scheme = container_of(kobj, | |
1384 | struct damon_sysfs_scheme, kobj); | |
1385 | ||
1386 | return sysfs_emit(buf, "%s\n", | |
1387 | damon_sysfs_damos_action_strs[scheme->action]); | |
1388 | } | |
1389 | ||
1390 | static ssize_t action_store(struct kobject *kobj, struct kobj_attribute *attr, | |
1391 | const char *buf, size_t count) | |
1392 | { | |
1393 | struct damon_sysfs_scheme *scheme = container_of(kobj, | |
1394 | struct damon_sysfs_scheme, kobj); | |
1395 | enum damos_action action; | |
1396 | ||
1397 | for (action = 0; action < NR_DAMOS_ACTIONS; action++) { | |
1398 | if (sysfs_streq(buf, damon_sysfs_damos_action_strs[action])) { | |
1399 | scheme->action = action; | |
1400 | return count; | |
1401 | } | |
1402 | } | |
1403 | return -EINVAL; | |
1404 | } | |
1405 | ||
a2a9f68e SP |
1406 | static ssize_t apply_interval_us_show(struct kobject *kobj, |
1407 | struct kobj_attribute *attr, char *buf) | |
1408 | { | |
1409 | struct damon_sysfs_scheme *scheme = container_of(kobj, | |
1410 | struct damon_sysfs_scheme, kobj); | |
1411 | ||
1412 | return sysfs_emit(buf, "%lu\n", scheme->apply_interval_us); | |
1413 | } | |
1414 | ||
1415 | static ssize_t apply_interval_us_store(struct kobject *kobj, | |
1416 | struct kobj_attribute *attr, const char *buf, size_t count) | |
1417 | { | |
1418 | struct damon_sysfs_scheme *scheme = container_of(kobj, | |
1419 | struct damon_sysfs_scheme, kobj); | |
1420 | int err = kstrtoul(buf, 0, &scheme->apply_interval_us); | |
1421 | ||
1422 | return err ? err : count; | |
1423 | } | |
1424 | ||
c8e7b4d0 SP |
1425 | static void damon_sysfs_scheme_release(struct kobject *kobj) |
1426 | { | |
1427 | kfree(container_of(kobj, struct damon_sysfs_scheme, kobj)); | |
1428 | } | |
1429 | ||
1430 | static struct kobj_attribute damon_sysfs_scheme_action_attr = | |
1431 | __ATTR_RW_MODE(action, 0600); | |
1432 | ||
a2a9f68e SP |
1433 | static struct kobj_attribute damon_sysfs_scheme_apply_interval_us_attr = |
1434 | __ATTR_RW_MODE(apply_interval_us, 0600); | |
1435 | ||
c8e7b4d0 SP |
1436 | static struct attribute *damon_sysfs_scheme_attrs[] = { |
1437 | &damon_sysfs_scheme_action_attr.attr, | |
a2a9f68e | 1438 | &damon_sysfs_scheme_apply_interval_us_attr.attr, |
c8e7b4d0 SP |
1439 | NULL, |
1440 | }; | |
1441 | ATTRIBUTE_GROUPS(damon_sysfs_scheme); | |
1442 | ||
e56397e8 | 1443 | static const struct kobj_type damon_sysfs_scheme_ktype = { |
c8e7b4d0 SP |
1444 | .release = damon_sysfs_scheme_release, |
1445 | .sysfs_ops = &kobj_sysfs_ops, | |
1446 | .default_groups = damon_sysfs_scheme_groups, | |
1447 | }; | |
1448 | ||
1449 | /* | |
1450 | * schemes directory | |
1451 | */ | |
1452 | ||
1453 | struct damon_sysfs_schemes *damon_sysfs_schemes_alloc(void) | |
1454 | { | |
1455 | return kzalloc(sizeof(struct damon_sysfs_schemes), GFP_KERNEL); | |
1456 | } | |
1457 | ||
1458 | void damon_sysfs_schemes_rm_dirs(struct damon_sysfs_schemes *schemes) | |
1459 | { | |
1460 | struct damon_sysfs_scheme **schemes_arr = schemes->schemes_arr; | |
1461 | int i; | |
1462 | ||
1463 | for (i = 0; i < schemes->nr; i++) { | |
1464 | damon_sysfs_scheme_rm_dirs(schemes_arr[i]); | |
1465 | kobject_put(&schemes_arr[i]->kobj); | |
1466 | } | |
1467 | schemes->nr = 0; | |
1468 | kfree(schemes_arr); | |
1469 | schemes->schemes_arr = NULL; | |
1470 | } | |
1471 | ||
1472 | static int damon_sysfs_schemes_add_dirs(struct damon_sysfs_schemes *schemes, | |
1473 | int nr_schemes) | |
1474 | { | |
1475 | struct damon_sysfs_scheme **schemes_arr, *scheme; | |
1476 | int err, i; | |
1477 | ||
1478 | damon_sysfs_schemes_rm_dirs(schemes); | |
1479 | if (!nr_schemes) | |
1480 | return 0; | |
1481 | ||
1482 | schemes_arr = kmalloc_array(nr_schemes, sizeof(*schemes_arr), | |
1483 | GFP_KERNEL | __GFP_NOWARN); | |
1484 | if (!schemes_arr) | |
1485 | return -ENOMEM; | |
1486 | schemes->schemes_arr = schemes_arr; | |
1487 | ||
1488 | for (i = 0; i < nr_schemes; i++) { | |
a2a9f68e SP |
1489 | /* |
1490 | * apply_interval_us as 0 means same to aggregation interval | |
1491 | * (same to before-apply_interval behavior) | |
1492 | */ | |
1493 | scheme = damon_sysfs_scheme_alloc(DAMOS_STAT, 0); | |
c8e7b4d0 SP |
1494 | if (!scheme) { |
1495 | damon_sysfs_schemes_rm_dirs(schemes); | |
1496 | return -ENOMEM; | |
1497 | } | |
1498 | ||
1499 | err = kobject_init_and_add(&scheme->kobj, | |
1500 | &damon_sysfs_scheme_ktype, &schemes->kobj, | |
1501 | "%d", i); | |
1502 | if (err) | |
1503 | goto out; | |
1504 | err = damon_sysfs_scheme_add_dirs(scheme); | |
1505 | if (err) | |
1506 | goto out; | |
1507 | ||
1508 | schemes_arr[i] = scheme; | |
1509 | schemes->nr++; | |
1510 | } | |
1511 | return 0; | |
1512 | ||
1513 | out: | |
1514 | damon_sysfs_schemes_rm_dirs(schemes); | |
1515 | kobject_put(&scheme->kobj); | |
1516 | return err; | |
1517 | } | |
1518 | ||
1519 | static ssize_t nr_schemes_show(struct kobject *kobj, | |
1520 | struct kobj_attribute *attr, char *buf) | |
1521 | { | |
1522 | struct damon_sysfs_schemes *schemes = container_of(kobj, | |
1523 | struct damon_sysfs_schemes, kobj); | |
1524 | ||
1525 | return sysfs_emit(buf, "%d\n", schemes->nr); | |
1526 | } | |
1527 | ||
1528 | static ssize_t nr_schemes_store(struct kobject *kobj, | |
1529 | struct kobj_attribute *attr, const char *buf, size_t count) | |
1530 | { | |
1531 | struct damon_sysfs_schemes *schemes; | |
1532 | int nr, err = kstrtoint(buf, 0, &nr); | |
1533 | ||
1534 | if (err) | |
1535 | return err; | |
1536 | if (nr < 0) | |
1537 | return -EINVAL; | |
1538 | ||
1539 | schemes = container_of(kobj, struct damon_sysfs_schemes, kobj); | |
1540 | ||
1541 | if (!mutex_trylock(&damon_sysfs_lock)) | |
1542 | return -EBUSY; | |
1543 | err = damon_sysfs_schemes_add_dirs(schemes, nr); | |
1544 | mutex_unlock(&damon_sysfs_lock); | |
1545 | if (err) | |
1546 | return err; | |
1547 | return count; | |
1548 | } | |
1549 | ||
1550 | static void damon_sysfs_schemes_release(struct kobject *kobj) | |
1551 | { | |
1552 | kfree(container_of(kobj, struct damon_sysfs_schemes, kobj)); | |
1553 | } | |
1554 | ||
1555 | static struct kobj_attribute damon_sysfs_schemes_nr_attr = | |
1556 | __ATTR_RW_MODE(nr_schemes, 0600); | |
1557 | ||
1558 | static struct attribute *damon_sysfs_schemes_attrs[] = { | |
1559 | &damon_sysfs_schemes_nr_attr.attr, | |
1560 | NULL, | |
1561 | }; | |
1562 | ATTRIBUTE_GROUPS(damon_sysfs_schemes); | |
1563 | ||
e56397e8 | 1564 | const struct kobj_type damon_sysfs_schemes_ktype = { |
c8e7b4d0 SP |
1565 | .release = damon_sysfs_schemes_release, |
1566 | .sysfs_ops = &kobj_sysfs_ops, | |
1567 | .default_groups = damon_sysfs_schemes_groups, | |
1568 | }; | |
1569 | ||
29cbb9a1 SP |
1570 | static bool damon_sysfs_memcg_path_eq(struct mem_cgroup *memcg, |
1571 | char *memcg_path_buf, char *path) | |
1572 | { | |
1573 | #ifdef CONFIG_MEMCG | |
1574 | cgroup_path(memcg->css.cgroup, memcg_path_buf, PATH_MAX); | |
1575 | if (sysfs_streq(memcg_path_buf, path)) | |
1576 | return true; | |
1577 | #endif /* CONFIG_MEMCG */ | |
1578 | return false; | |
1579 | } | |
1580 | ||
1581 | static int damon_sysfs_memcg_path_to_id(char *memcg_path, unsigned short *id) | |
1582 | { | |
1583 | struct mem_cgroup *memcg; | |
1584 | char *path; | |
1585 | bool found = false; | |
1586 | ||
1587 | if (!memcg_path) | |
1588 | return -EINVAL; | |
1589 | ||
1590 | path = kmalloc(sizeof(*path) * PATH_MAX, GFP_KERNEL); | |
1591 | if (!path) | |
1592 | return -ENOMEM; | |
1593 | ||
1594 | for (memcg = mem_cgroup_iter(NULL, NULL, NULL); memcg; | |
1595 | memcg = mem_cgroup_iter(NULL, memcg, NULL)) { | |
1596 | /* skip removed memcg */ | |
1597 | if (!mem_cgroup_id(memcg)) | |
1598 | continue; | |
1599 | if (damon_sysfs_memcg_path_eq(memcg, path, memcg_path)) { | |
1600 | *id = mem_cgroup_id(memcg); | |
1601 | found = true; | |
1602 | break; | |
1603 | } | |
1604 | } | |
1605 | ||
1606 | kfree(path); | |
1607 | return found ? 0 : -EINVAL; | |
1608 | } | |
1609 | ||
1610 | static int damon_sysfs_set_scheme_filters(struct damos *scheme, | |
1611 | struct damon_sysfs_scheme_filters *sysfs_filters) | |
1612 | { | |
1613 | int i; | |
1614 | struct damos_filter *filter, *next; | |
1615 | ||
1616 | damos_for_each_filter_safe(filter, next, scheme) | |
1617 | damos_destroy_filter(filter); | |
1618 | ||
1619 | for (i = 0; i < sysfs_filters->nr; i++) { | |
1620 | struct damon_sysfs_scheme_filter *sysfs_filter = | |
1621 | sysfs_filters->filters_arr[i]; | |
1622 | struct damos_filter *filter = | |
1623 | damos_new_filter(sysfs_filter->type, | |
1624 | sysfs_filter->matching); | |
1625 | int err; | |
1626 | ||
1627 | if (!filter) | |
1628 | return -ENOMEM; | |
1629 | if (filter->type == DAMOS_FILTER_TYPE_MEMCG) { | |
1630 | err = damon_sysfs_memcg_path_to_id( | |
1631 | sysfs_filter->memcg_path, | |
1632 | &filter->memcg_id); | |
1633 | if (err) { | |
1634 | damos_destroy_filter(filter); | |
1635 | return err; | |
1636 | } | |
2f1abcfc SP |
1637 | } else if (filter->type == DAMOS_FILTER_TYPE_ADDR) { |
1638 | if (sysfs_filter->addr_range.end < | |
1639 | sysfs_filter->addr_range.start) { | |
1640 | damos_destroy_filter(filter); | |
1641 | return -EINVAL; | |
1642 | } | |
1643 | filter->addr_range = sysfs_filter->addr_range; | |
9f6e47ab SP |
1644 | } else if (filter->type == DAMOS_FILTER_TYPE_TARGET) { |
1645 | filter->target_idx = sysfs_filter->target_idx; | |
29cbb9a1 | 1646 | } |
2f1abcfc | 1647 | |
29cbb9a1 SP |
1648 | damos_add_filter(scheme, filter); |
1649 | } | |
1650 | return 0; | |
1651 | } | |
1652 | ||
c8e7b4d0 SP |
1653 | static struct damos *damon_sysfs_mk_scheme( |
1654 | struct damon_sysfs_scheme *sysfs_scheme) | |
1655 | { | |
1656 | struct damon_sysfs_access_pattern *access_pattern = | |
1657 | sysfs_scheme->access_pattern; | |
1658 | struct damon_sysfs_quotas *sysfs_quotas = sysfs_scheme->quotas; | |
1659 | struct damon_sysfs_weights *sysfs_weights = sysfs_quotas->weights; | |
1660 | struct damon_sysfs_watermarks *sysfs_wmarks = sysfs_scheme->watermarks; | |
29cbb9a1 SP |
1661 | struct damon_sysfs_scheme_filters *sysfs_filters = |
1662 | sysfs_scheme->filters; | |
1663 | struct damos *scheme; | |
1664 | int err; | |
c8e7b4d0 SP |
1665 | |
1666 | struct damos_access_pattern pattern = { | |
1667 | .min_sz_region = access_pattern->sz->min, | |
1668 | .max_sz_region = access_pattern->sz->max, | |
1669 | .min_nr_accesses = access_pattern->nr_accesses->min, | |
1670 | .max_nr_accesses = access_pattern->nr_accesses->max, | |
1671 | .min_age_region = access_pattern->age->min, | |
1672 | .max_age_region = access_pattern->age->max, | |
1673 | }; | |
1674 | struct damos_quota quota = { | |
1675 | .ms = sysfs_quotas->ms, | |
1676 | .sz = sysfs_quotas->sz, | |
1677 | .reset_interval = sysfs_quotas->reset_interval_ms, | |
1678 | .weight_sz = sysfs_weights->sz, | |
1679 | .weight_nr_accesses = sysfs_weights->nr_accesses, | |
1680 | .weight_age = sysfs_weights->age, | |
1681 | }; | |
1682 | struct damos_watermarks wmarks = { | |
1683 | .metric = sysfs_wmarks->metric, | |
1684 | .interval = sysfs_wmarks->interval_us, | |
1685 | .high = sysfs_wmarks->high, | |
1686 | .mid = sysfs_wmarks->mid, | |
1687 | .low = sysfs_wmarks->low, | |
1688 | }; | |
1689 | ||
a2a9f68e SP |
1690 | scheme = damon_new_scheme(&pattern, sysfs_scheme->action, |
1691 | sysfs_scheme->apply_interval_us, "a, &wmarks); | |
29cbb9a1 SP |
1692 | if (!scheme) |
1693 | return NULL; | |
1694 | ||
1695 | err = damon_sysfs_set_scheme_filters(scheme, sysfs_filters); | |
1696 | if (err) { | |
1697 | damon_destroy_scheme(scheme); | |
1698 | return NULL; | |
1699 | } | |
1700 | return scheme; | |
c8e7b4d0 SP |
1701 | } |
1702 | ||
1703 | static void damon_sysfs_update_scheme(struct damos *scheme, | |
1704 | struct damon_sysfs_scheme *sysfs_scheme) | |
1705 | { | |
1706 | struct damon_sysfs_access_pattern *access_pattern = | |
1707 | sysfs_scheme->access_pattern; | |
1708 | struct damon_sysfs_quotas *sysfs_quotas = sysfs_scheme->quotas; | |
1709 | struct damon_sysfs_weights *sysfs_weights = sysfs_quotas->weights; | |
1710 | struct damon_sysfs_watermarks *sysfs_wmarks = sysfs_scheme->watermarks; | |
29cbb9a1 | 1711 | int err; |
c8e7b4d0 SP |
1712 | |
1713 | scheme->pattern.min_sz_region = access_pattern->sz->min; | |
1714 | scheme->pattern.max_sz_region = access_pattern->sz->max; | |
1715 | scheme->pattern.min_nr_accesses = access_pattern->nr_accesses->min; | |
1716 | scheme->pattern.max_nr_accesses = access_pattern->nr_accesses->max; | |
1717 | scheme->pattern.min_age_region = access_pattern->age->min; | |
1718 | scheme->pattern.max_age_region = access_pattern->age->max; | |
1719 | ||
1720 | scheme->action = sysfs_scheme->action; | |
a2a9f68e | 1721 | scheme->apply_interval_us = sysfs_scheme->apply_interval_us; |
c8e7b4d0 SP |
1722 | |
1723 | scheme->quota.ms = sysfs_quotas->ms; | |
1724 | scheme->quota.sz = sysfs_quotas->sz; | |
1725 | scheme->quota.reset_interval = sysfs_quotas->reset_interval_ms; | |
1726 | scheme->quota.weight_sz = sysfs_weights->sz; | |
1727 | scheme->quota.weight_nr_accesses = sysfs_weights->nr_accesses; | |
1728 | scheme->quota.weight_age = sysfs_weights->age; | |
1729 | ||
1730 | scheme->wmarks.metric = sysfs_wmarks->metric; | |
1731 | scheme->wmarks.interval = sysfs_wmarks->interval_us; | |
1732 | scheme->wmarks.high = sysfs_wmarks->high; | |
1733 | scheme->wmarks.mid = sysfs_wmarks->mid; | |
1734 | scheme->wmarks.low = sysfs_wmarks->low; | |
29cbb9a1 SP |
1735 | |
1736 | err = damon_sysfs_set_scheme_filters(scheme, sysfs_scheme->filters); | |
1737 | if (err) | |
1738 | damon_destroy_scheme(scheme); | |
c8e7b4d0 SP |
1739 | } |
1740 | ||
1741 | int damon_sysfs_set_schemes(struct damon_ctx *ctx, | |
1742 | struct damon_sysfs_schemes *sysfs_schemes) | |
1743 | { | |
1744 | struct damos *scheme, *next; | |
1745 | int i = 0; | |
1746 | ||
1747 | damon_for_each_scheme_safe(scheme, next, ctx) { | |
1748 | if (i < sysfs_schemes->nr) | |
1749 | damon_sysfs_update_scheme(scheme, | |
1750 | sysfs_schemes->schemes_arr[i]); | |
1751 | else | |
1752 | damon_destroy_scheme(scheme); | |
1753 | i++; | |
1754 | } | |
1755 | ||
1756 | for (; i < sysfs_schemes->nr; i++) { | |
1757 | struct damos *scheme, *next; | |
1758 | ||
1759 | scheme = damon_sysfs_mk_scheme(sysfs_schemes->schemes_arr[i]); | |
1760 | if (!scheme) { | |
1761 | damon_for_each_scheme_safe(scheme, next, ctx) | |
1762 | damon_destroy_scheme(scheme); | |
1763 | return -ENOMEM; | |
1764 | } | |
1765 | damon_add_scheme(ctx, scheme); | |
1766 | } | |
1767 | return 0; | |
1768 | } | |
1769 | ||
1770 | void damon_sysfs_schemes_update_stats( | |
1771 | struct damon_sysfs_schemes *sysfs_schemes, | |
1772 | struct damon_ctx *ctx) | |
1773 | { | |
1774 | struct damos *scheme; | |
1775 | int schemes_idx = 0; | |
1776 | ||
1777 | damon_for_each_scheme(scheme, ctx) { | |
1778 | struct damon_sysfs_stats *sysfs_stats; | |
1779 | ||
1780 | /* user could have removed the scheme sysfs dir */ | |
1781 | if (schemes_idx >= sysfs_schemes->nr) | |
1782 | break; | |
1783 | ||
1784 | sysfs_stats = sysfs_schemes->schemes_arr[schemes_idx++]->stats; | |
1785 | sysfs_stats->nr_tried = scheme->stat.nr_tried; | |
1786 | sysfs_stats->sz_tried = scheme->stat.sz_tried; | |
1787 | sysfs_stats->nr_applied = scheme->stat.nr_applied; | |
1788 | sysfs_stats->sz_applied = scheme->stat.sz_applied; | |
1789 | sysfs_stats->qt_exceeds = scheme->stat.qt_exceeds; | |
1790 | } | |
1791 | } | |
f1d13cac SP |
1792 | |
1793 | /* | |
1794 | * damon_sysfs_schemes that need to update its schemes regions dir. Protected | |
1795 | * by damon_sysfs_lock | |
1796 | */ | |
1797 | static struct damon_sysfs_schemes *damon_sysfs_schemes_for_damos_callback; | |
1798 | static int damon_sysfs_schemes_region_idx; | |
6ad243b8 | 1799 | static bool damos_regions_upd_total_bytes_only; |
f1d13cac SP |
1800 | |
1801 | /* | |
1802 | * DAMON callback that called before damos apply. While this callback is | |
1803 | * registered, damon_sysfs_lock should be held to ensure the regions | |
1804 | * directories exist. | |
1805 | */ | |
1806 | static int damon_sysfs_before_damos_apply(struct damon_ctx *ctx, | |
1807 | struct damon_target *t, struct damon_region *r, | |
1808 | struct damos *s) | |
1809 | { | |
1810 | struct damos *scheme; | |
1811 | struct damon_sysfs_scheme_regions *sysfs_regions; | |
1812 | struct damon_sysfs_scheme_region *region; | |
1813 | struct damon_sysfs_schemes *sysfs_schemes = | |
1814 | damon_sysfs_schemes_for_damos_callback; | |
1815 | int schemes_idx = 0; | |
1816 | ||
1817 | damon_for_each_scheme(scheme, ctx) { | |
1818 | if (scheme == s) | |
1819 | break; | |
1820 | schemes_idx++; | |
1821 | } | |
1822 | ||
1823 | /* user could have removed the scheme sysfs dir */ | |
1824 | if (schemes_idx >= sysfs_schemes->nr) | |
1825 | return 0; | |
1826 | ||
1827 | sysfs_regions = sysfs_schemes->schemes_arr[schemes_idx]->tried_regions; | |
4d4e41b6 SP |
1828 | if (sysfs_regions->upd_status == DAMOS_TRIED_REGIONS_UPD_FINISHED) |
1829 | return 0; | |
1830 | if (sysfs_regions->upd_status == DAMOS_TRIED_REGIONS_UPD_IDLE) | |
1831 | sysfs_regions->upd_status = DAMOS_TRIED_REGIONS_UPD_STARTED; | |
b69f92a7 | 1832 | sysfs_regions->total_bytes += r->ar.end - r->ar.start; |
6ad243b8 SP |
1833 | if (damos_regions_upd_total_bytes_only) |
1834 | return 0; | |
1835 | ||
f1d13cac | 1836 | region = damon_sysfs_scheme_region_alloc(r); |
ae636ae2 SP |
1837 | if (!region) |
1838 | return 0; | |
f1d13cac SP |
1839 | list_add_tail(®ion->list, &sysfs_regions->regions_list); |
1840 | sysfs_regions->nr_regions++; | |
1841 | if (kobject_init_and_add(®ion->kobj, | |
1842 | &damon_sysfs_scheme_region_ktype, | |
1843 | &sysfs_regions->kobj, "%d", | |
1844 | damon_sysfs_schemes_region_idx++)) { | |
1845 | kobject_put(®ion->kobj); | |
1846 | } | |
1847 | return 0; | |
1848 | } | |
1849 | ||
4d4e41b6 SP |
1850 | /* |
1851 | * DAMON callback that called after each accesses sampling. While this | |
1852 | * callback is registered, damon_sysfs_lock should be held to ensure the | |
1853 | * regions directories exist. | |
1854 | */ | |
1855 | static int damon_sysfs_after_sampling(struct damon_ctx *ctx) | |
1856 | { | |
1857 | struct damon_sysfs_schemes *sysfs_schemes = | |
1858 | damon_sysfs_schemes_for_damos_callback; | |
1859 | struct damon_sysfs_scheme_regions *sysfs_regions; | |
1860 | int i; | |
1861 | ||
1862 | for (i = 0; i < sysfs_schemes->nr; i++) { | |
1863 | sysfs_regions = sysfs_schemes->schemes_arr[i]->tried_regions; | |
1864 | if (sysfs_regions->upd_status == | |
7d6fa31a SP |
1865 | DAMOS_TRIED_REGIONS_UPD_STARTED || |
1866 | time_after(jiffies, | |
1867 | sysfs_regions->upd_timeout_jiffies)) | |
4d4e41b6 SP |
1868 | sysfs_regions->upd_status = |
1869 | DAMOS_TRIED_REGIONS_UPD_FINISHED; | |
1870 | } | |
1871 | ||
1872 | return 0; | |
1873 | } | |
1874 | ||
f1d13cac | 1875 | /* Called from damon_sysfs_cmd_request_callback under damon_sysfs_lock */ |
772c15e5 | 1876 | int damon_sysfs_schemes_clear_regions( |
f1d13cac SP |
1877 | struct damon_sysfs_schemes *sysfs_schemes, |
1878 | struct damon_ctx *ctx) | |
1879 | { | |
1880 | struct damos *scheme; | |
1881 | int schemes_idx = 0; | |
1882 | ||
1883 | damon_for_each_scheme(scheme, ctx) { | |
1884 | struct damon_sysfs_scheme *sysfs_scheme; | |
1885 | ||
772c15e5 SP |
1886 | /* user could have removed the scheme sysfs dir */ |
1887 | if (schemes_idx >= sysfs_schemes->nr) | |
1888 | break; | |
1889 | ||
f1d13cac SP |
1890 | sysfs_scheme = sysfs_schemes->schemes_arr[schemes_idx++]; |
1891 | damon_sysfs_scheme_regions_rm_dirs( | |
1892 | sysfs_scheme->tried_regions); | |
b69f92a7 | 1893 | sysfs_scheme->tried_regions->total_bytes = 0; |
f1d13cac | 1894 | } |
772c15e5 SP |
1895 | return 0; |
1896 | } | |
f1d13cac | 1897 | |
7d6fa31a SP |
1898 | static struct damos *damos_sysfs_nth_scheme(int n, struct damon_ctx *ctx) |
1899 | { | |
1900 | struct damos *scheme; | |
1901 | int i = 0; | |
1902 | ||
1903 | damon_for_each_scheme(scheme, ctx) { | |
1904 | if (i == n) | |
1905 | return scheme; | |
1906 | i++; | |
1907 | } | |
1908 | return NULL; | |
1909 | } | |
1910 | ||
4d4e41b6 | 1911 | static void damos_tried_regions_init_upd_status( |
7d6fa31a SP |
1912 | struct damon_sysfs_schemes *sysfs_schemes, |
1913 | struct damon_ctx *ctx) | |
4d4e41b6 SP |
1914 | { |
1915 | int i; | |
7d6fa31a SP |
1916 | struct damos *scheme; |
1917 | struct damon_sysfs_scheme_regions *sysfs_regions; | |
4d4e41b6 | 1918 | |
7d6fa31a SP |
1919 | for (i = 0; i < sysfs_schemes->nr; i++) { |
1920 | sysfs_regions = sysfs_schemes->schemes_arr[i]->tried_regions; | |
1921 | scheme = damos_sysfs_nth_scheme(i, ctx); | |
1922 | if (!scheme) { | |
1923 | sysfs_regions->upd_status = | |
1924 | DAMOS_TRIED_REGIONS_UPD_FINISHED; | |
1925 | continue; | |
1926 | } | |
1927 | sysfs_regions->upd_status = DAMOS_TRIED_REGIONS_UPD_IDLE; | |
1928 | sysfs_regions->upd_timeout_jiffies = jiffies + | |
1929 | 2 * usecs_to_jiffies(scheme->apply_interval_us ? | |
1930 | scheme->apply_interval_us : | |
1931 | ctx->attrs.sample_interval); | |
1932 | } | |
4d4e41b6 SP |
1933 | } |
1934 | ||
772c15e5 SP |
1935 | /* Called from damon_sysfs_cmd_request_callback under damon_sysfs_lock */ |
1936 | int damon_sysfs_schemes_update_regions_start( | |
1937 | struct damon_sysfs_schemes *sysfs_schemes, | |
6ad243b8 | 1938 | struct damon_ctx *ctx, bool total_bytes_only) |
772c15e5 SP |
1939 | { |
1940 | damon_sysfs_schemes_clear_regions(sysfs_schemes, ctx); | |
f1d13cac | 1941 | damon_sysfs_schemes_for_damos_callback = sysfs_schemes; |
7d6fa31a | 1942 | damos_tried_regions_init_upd_status(sysfs_schemes, ctx); |
6ad243b8 | 1943 | damos_regions_upd_total_bytes_only = total_bytes_only; |
f1d13cac | 1944 | ctx->callback.before_damos_apply = damon_sysfs_before_damos_apply; |
4d4e41b6 | 1945 | ctx->callback.after_sampling = damon_sysfs_after_sampling; |
f1d13cac SP |
1946 | return 0; |
1947 | } | |
1948 | ||
76126332 SP |
1949 | bool damos_sysfs_regions_upd_done(void) |
1950 | { | |
1951 | struct damon_sysfs_schemes *sysfs_schemes = | |
1952 | damon_sysfs_schemes_for_damos_callback; | |
1953 | struct damon_sysfs_scheme_regions *sysfs_regions; | |
1954 | int i; | |
1955 | ||
1956 | for (i = 0; i < sysfs_schemes->nr; i++) { | |
1957 | sysfs_regions = sysfs_schemes->schemes_arr[i]->tried_regions; | |
1958 | if (sysfs_regions->upd_status != | |
1959 | DAMOS_TRIED_REGIONS_UPD_FINISHED) | |
1960 | return false; | |
1961 | } | |
1962 | return true; | |
1963 | } | |
1964 | ||
f1d13cac SP |
1965 | /* |
1966 | * Called from damon_sysfs_cmd_request_callback under damon_sysfs_lock. Caller | |
1967 | * should unlock damon_sysfs_lock which held before | |
1968 | * damon_sysfs_schemes_update_regions_start() | |
1969 | */ | |
1970 | int damon_sysfs_schemes_update_regions_stop(struct damon_ctx *ctx) | |
1971 | { | |
1972 | damon_sysfs_schemes_for_damos_callback = NULL; | |
1973 | ctx->callback.before_damos_apply = NULL; | |
4d4e41b6 | 1974 | ctx->callback.after_sampling = NULL; |
f1d13cac SP |
1975 | damon_sysfs_schemes_region_idx = 0; |
1976 | return 0; | |
1977 | } |