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2
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4
5#include <linux/module.h>
6#include <linux/device.h>
7#include <linux/sort.h>
8#include <linux/slab.h>
9#include <linux/list.h>
10#include <linux/nd.h>
11#include "nd-core.h"
12#include "pmem.h"
13#include "pfn.h"
14#include "nd.h"
15
16static void namespace_io_release(struct device *dev)
17{
18 struct nd_namespace_io *nsio = to_nd_namespace_io(dev);
19
20 kfree(nsio);
21}
22
23static void namespace_pmem_release(struct device *dev)
24{
25 struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
26 struct nd_region *nd_region = to_nd_region(dev->parent);
27
28 if (nspm->id >= 0)
29 ida_simple_remove(&nd_region->ns_ida, nspm->id);
30 kfree(nspm->alt_name);
31 kfree(nspm->uuid);
32 kfree(nspm);
33}
34
35static void namespace_blk_release(struct device *dev)
36{
37 struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
38 struct nd_region *nd_region = to_nd_region(dev->parent);
39
40 if (nsblk->id >= 0)
41 ida_simple_remove(&nd_region->ns_ida, nsblk->id);
42 kfree(nsblk->alt_name);
43 kfree(nsblk->uuid);
44 kfree(nsblk->res);
45 kfree(nsblk);
46}
47
48static bool is_namespace_pmem(const struct device *dev);
49static bool is_namespace_blk(const struct device *dev);
50static bool is_namespace_io(const struct device *dev);
51
52static int is_uuid_busy(struct device *dev, void *data)
53{
54 u8 *uuid1 = data, *uuid2 = NULL;
55
56 if (is_namespace_pmem(dev)) {
57 struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
58
59 uuid2 = nspm->uuid;
60 } else if (is_namespace_blk(dev)) {
61 struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
62
63 uuid2 = nsblk->uuid;
64 } else if (is_nd_btt(dev)) {
65 struct nd_btt *nd_btt = to_nd_btt(dev);
66
67 uuid2 = nd_btt->uuid;
68 } else if (is_nd_pfn(dev)) {
69 struct nd_pfn *nd_pfn = to_nd_pfn(dev);
70
71 uuid2 = nd_pfn->uuid;
72 }
73
74 if (uuid2 && memcmp(uuid1, uuid2, NSLABEL_UUID_LEN) == 0)
75 return -EBUSY;
76
77 return 0;
78}
79
80static int is_namespace_uuid_busy(struct device *dev, void *data)
81{
82 if (is_nd_region(dev))
83 return device_for_each_child(dev, data, is_uuid_busy);
84 return 0;
85}
86
87
88
89
90
91
92bool nd_is_uuid_unique(struct device *dev, u8 *uuid)
93{
94 struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
95
96 if (!nvdimm_bus)
97 return false;
98 WARN_ON_ONCE(!is_nvdimm_bus_locked(&nvdimm_bus->dev));
99 if (device_for_each_child(&nvdimm_bus->dev, uuid,
100 is_namespace_uuid_busy) != 0)
101 return false;
102 return true;
103}
104
105bool pmem_should_map_pages(struct device *dev)
106{
107 struct nd_region *nd_region = to_nd_region(dev->parent);
108 struct nd_namespace_common *ndns = to_ndns(dev);
109 struct nd_namespace_io *nsio;
110
111 if (!IS_ENABLED(CONFIG_ZONE_DEVICE))
112 return false;
113
114 if (!test_bit(ND_REGION_PAGEMAP, &nd_region->flags))
115 return false;
116
117 if (is_nd_pfn(dev) || is_nd_btt(dev))
118 return false;
119
120 if (ndns->force_raw)
121 return false;
122
123 nsio = to_nd_namespace_io(dev);
124 if (region_intersects(nsio->res.start, resource_size(&nsio->res),
125 IORESOURCE_SYSTEM_RAM,
126 IORES_DESC_NONE) == REGION_MIXED)
127 return false;
128
129 return ARCH_MEMREMAP_PMEM == MEMREMAP_WB;
130}
131EXPORT_SYMBOL(pmem_should_map_pages);
132
133unsigned int pmem_sector_size(struct nd_namespace_common *ndns)
134{
135 if (is_namespace_pmem(&ndns->dev)) {
136 struct nd_namespace_pmem *nspm;
137
138 nspm = to_nd_namespace_pmem(&ndns->dev);
139 if (nspm->lbasize == 0 || nspm->lbasize == 512)
140 ;
141 else if (nspm->lbasize == 4096)
142 return 4096;
143 else
144 dev_WARN(&ndns->dev, "unsupported sector size: %ld\n",
145 nspm->lbasize);
146 }
147
148
149
150
151
152 return 512;
153}
154EXPORT_SYMBOL(pmem_sector_size);
155
156const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
157 char *name)
158{
159 struct nd_region *nd_region = to_nd_region(ndns->dev.parent);
160 const char *suffix = NULL;
161
162 if (ndns->claim && is_nd_btt(ndns->claim))
163 suffix = "s";
164
165 if (is_namespace_pmem(&ndns->dev) || is_namespace_io(&ndns->dev)) {
166 int nsidx = 0;
167
168 if (is_namespace_pmem(&ndns->dev)) {
169 struct nd_namespace_pmem *nspm;
170
171 nspm = to_nd_namespace_pmem(&ndns->dev);
172 nsidx = nspm->id;
173 }
174
175 if (nsidx)
176 sprintf(name, "pmem%d.%d%s", nd_region->id, nsidx,
177 suffix ? suffix : "");
178 else
179 sprintf(name, "pmem%d%s", nd_region->id,
180 suffix ? suffix : "");
181 } else if (is_namespace_blk(&ndns->dev)) {
182 struct nd_namespace_blk *nsblk;
183
184 nsblk = to_nd_namespace_blk(&ndns->dev);
185 sprintf(name, "ndblk%d.%d%s", nd_region->id, nsblk->id,
186 suffix ? suffix : "");
187 } else {
188 return NULL;
189 }
190
191 return name;
192}
193EXPORT_SYMBOL(nvdimm_namespace_disk_name);
194
195const u8 *nd_dev_to_uuid(struct device *dev)
196{
197 static const u8 null_uuid[16];
198
199 if (!dev)
200 return null_uuid;
201
202 if (is_namespace_pmem(dev)) {
203 struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
204
205 return nspm->uuid;
206 } else if (is_namespace_blk(dev)) {
207 struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
208
209 return nsblk->uuid;
210 } else
211 return null_uuid;
212}
213EXPORT_SYMBOL(nd_dev_to_uuid);
214
215static ssize_t nstype_show(struct device *dev,
216 struct device_attribute *attr, char *buf)
217{
218 struct nd_region *nd_region = to_nd_region(dev->parent);
219
220 return sprintf(buf, "%d\n", nd_region_to_nstype(nd_region));
221}
222static DEVICE_ATTR_RO(nstype);
223
224static ssize_t __alt_name_store(struct device *dev, const char *buf,
225 const size_t len)
226{
227 char *input, *pos, *alt_name, **ns_altname;
228 ssize_t rc;
229
230 if (is_namespace_pmem(dev)) {
231 struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
232
233 ns_altname = &nspm->alt_name;
234 } else if (is_namespace_blk(dev)) {
235 struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
236
237 ns_altname = &nsblk->alt_name;
238 } else
239 return -ENXIO;
240
241 if (dev->driver || to_ndns(dev)->claim)
242 return -EBUSY;
243
244 input = kstrndup(buf, len, GFP_KERNEL);
245 if (!input)
246 return -ENOMEM;
247
248 pos = strim(input);
249 if (strlen(pos) + 1 > NSLABEL_NAME_LEN) {
250 rc = -EINVAL;
251 goto out;
252 }
253
254 alt_name = kzalloc(NSLABEL_NAME_LEN, GFP_KERNEL);
255 if (!alt_name) {
256 rc = -ENOMEM;
257 goto out;
258 }
259 kfree(*ns_altname);
260 *ns_altname = alt_name;
261 sprintf(*ns_altname, "%s", pos);
262 rc = len;
263
264out:
265 kfree(input);
266 return rc;
267}
268
269static resource_size_t nd_namespace_blk_size(struct nd_namespace_blk *nsblk)
270{
271 struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent);
272 struct nd_mapping *nd_mapping = &nd_region->mapping[0];
273 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
274 struct nd_label_id label_id;
275 resource_size_t size = 0;
276 struct resource *res;
277
278 if (!nsblk->uuid)
279 return 0;
280 nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL);
281 for_each_dpa_resource(ndd, res)
282 if (strcmp(res->name, label_id.id) == 0)
283 size += resource_size(res);
284 return size;
285}
286
287static bool __nd_namespace_blk_validate(struct nd_namespace_blk *nsblk)
288{
289 struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent);
290 struct nd_mapping *nd_mapping = &nd_region->mapping[0];
291 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
292 struct nd_label_id label_id;
293 struct resource *res;
294 int count, i;
295
296 if (!nsblk->uuid || !nsblk->lbasize || !ndd)
297 return false;
298
299 count = 0;
300 nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL);
301 for_each_dpa_resource(ndd, res) {
302 if (strcmp(res->name, label_id.id) != 0)
303 continue;
304
305
306
307
308 if (res->flags & DPA_RESOURCE_ADJUSTED)
309 return false;
310 count++;
311 }
312
313
314 if (count != nsblk->num_resources)
315 return false;
316
317 for (i = 0; i < nsblk->num_resources; i++) {
318 struct resource *found = NULL;
319
320 for_each_dpa_resource(ndd, res)
321 if (res == nsblk->res[i]) {
322 found = res;
323 break;
324 }
325
326 if (!found)
327 return false;
328 }
329
330 return true;
331}
332
333resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk)
334{
335 resource_size_t size;
336
337 nvdimm_bus_lock(&nsblk->common.dev);
338 size = __nd_namespace_blk_validate(nsblk);
339 nvdimm_bus_unlock(&nsblk->common.dev);
340
341 return size;
342}
343EXPORT_SYMBOL(nd_namespace_blk_validate);
344
345
346static int nd_namespace_label_update(struct nd_region *nd_region,
347 struct device *dev)
348{
349 dev_WARN_ONCE(dev, dev->driver || to_ndns(dev)->claim,
350 "namespace must be idle during label update\n");
351 if (dev->driver || to_ndns(dev)->claim)
352 return 0;
353
354
355
356
357
358 if (is_namespace_pmem(dev)) {
359 struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
360 resource_size_t size = resource_size(&nspm->nsio.res);
361
362 if (size == 0 && nspm->uuid)
363 ;
364 else if (!nspm->uuid)
365 return 0;
366
367 return nd_pmem_namespace_label_update(nd_region, nspm, size);
368 } else if (is_namespace_blk(dev)) {
369 struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
370 resource_size_t size = nd_namespace_blk_size(nsblk);
371
372 if (size == 0 && nsblk->uuid)
373 ;
374 else if (!nsblk->uuid || !nsblk->lbasize)
375 return 0;
376
377 return nd_blk_namespace_label_update(nd_region, nsblk, size);
378 } else
379 return -ENXIO;
380}
381
382static ssize_t alt_name_store(struct device *dev,
383 struct device_attribute *attr, const char *buf, size_t len)
384{
385 struct nd_region *nd_region = to_nd_region(dev->parent);
386 ssize_t rc;
387
388 nd_device_lock(dev);
389 nvdimm_bus_lock(dev);
390 wait_nvdimm_bus_probe_idle(dev);
391 rc = __alt_name_store(dev, buf, len);
392 if (rc >= 0)
393 rc = nd_namespace_label_update(nd_region, dev);
394 dev_dbg(dev, "%s(%zd)\n", rc < 0 ? "fail " : "", rc);
395 nvdimm_bus_unlock(dev);
396 nd_device_unlock(dev);
397
398 return rc < 0 ? rc : len;
399}
400
401static ssize_t alt_name_show(struct device *dev,
402 struct device_attribute *attr, char *buf)
403{
404 char *ns_altname;
405
406 if (is_namespace_pmem(dev)) {
407 struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
408
409 ns_altname = nspm->alt_name;
410 } else if (is_namespace_blk(dev)) {
411 struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
412
413 ns_altname = nsblk->alt_name;
414 } else
415 return -ENXIO;
416
417 return sprintf(buf, "%s\n", ns_altname ? ns_altname : "");
418}
419static DEVICE_ATTR_RW(alt_name);
420
421static int scan_free(struct nd_region *nd_region,
422 struct nd_mapping *nd_mapping, struct nd_label_id *label_id,
423 resource_size_t n)
424{
425 bool is_blk = strncmp(label_id->id, "blk", 3) == 0;
426 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
427 int rc = 0;
428
429 while (n) {
430 struct resource *res, *last;
431 resource_size_t new_start;
432
433 last = NULL;
434 for_each_dpa_resource(ndd, res)
435 if (strcmp(res->name, label_id->id) == 0)
436 last = res;
437 res = last;
438 if (!res)
439 return 0;
440
441 if (n >= resource_size(res)) {
442 n -= resource_size(res);
443 nd_dbg_dpa(nd_region, ndd, res, "delete %d\n", rc);
444 nvdimm_free_dpa(ndd, res);
445
446 continue;
447 }
448
449
450
451
452
453 if (is_blk)
454 new_start = res->start + n;
455 else
456 new_start = res->start;
457
458 rc = adjust_resource(res, new_start, resource_size(res) - n);
459 if (rc == 0)
460 res->flags |= DPA_RESOURCE_ADJUSTED;
461 nd_dbg_dpa(nd_region, ndd, res, "shrink %d\n", rc);
462 break;
463 }
464
465 return rc;
466}
467
468
469
470
471
472
473
474
475
476
477
478
479static int shrink_dpa_allocation(struct nd_region *nd_region,
480 struct nd_label_id *label_id, resource_size_t n)
481{
482 int i;
483
484 for (i = 0; i < nd_region->ndr_mappings; i++) {
485 struct nd_mapping *nd_mapping = &nd_region->mapping[i];
486 int rc;
487
488 rc = scan_free(nd_region, nd_mapping, label_id, n);
489 if (rc)
490 return rc;
491 }
492
493 return 0;
494}
495
496static resource_size_t init_dpa_allocation(struct nd_label_id *label_id,
497 struct nd_region *nd_region, struct nd_mapping *nd_mapping,
498 resource_size_t n)
499{
500 bool is_blk = strncmp(label_id->id, "blk", 3) == 0;
501 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
502 resource_size_t first_dpa;
503 struct resource *res;
504 int rc = 0;
505
506
507 if (is_blk)
508 first_dpa = nd_mapping->start + nd_mapping->size - n;
509 else
510 first_dpa = nd_mapping->start;
511
512
513 res = nvdimm_allocate_dpa(ndd, label_id, first_dpa, n);
514 if (!res)
515 rc = -EBUSY;
516
517 nd_dbg_dpa(nd_region, ndd, res, "init %d\n", rc);
518 return rc ? n : 0;
519}
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538static void space_valid(struct nd_region *nd_region, struct nvdimm_drvdata *ndd,
539 struct nd_label_id *label_id, struct resource *prev,
540 struct resource *next, struct resource *exist,
541 resource_size_t n, struct resource *valid)
542{
543 bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0;
544 bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0;
545 unsigned long align;
546
547 align = nd_region->align / nd_region->ndr_mappings;
548 valid->start = ALIGN(valid->start, align);
549 valid->end = ALIGN_DOWN(valid->end + 1, align) - 1;
550
551 if (valid->start >= valid->end)
552 goto invalid;
553
554 if (is_reserve)
555 return;
556
557 if (!is_pmem) {
558 struct nd_mapping *nd_mapping = &nd_region->mapping[0];
559 struct nvdimm_bus *nvdimm_bus;
560 struct blk_alloc_info info = {
561 .nd_mapping = nd_mapping,
562 .available = nd_mapping->size,
563 .res = valid,
564 };
565
566 WARN_ON(!is_nd_blk(&nd_region->dev));
567 nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev);
568 device_for_each_child(&nvdimm_bus->dev, &info, alias_dpa_busy);
569 return;
570 }
571
572
573 if (resource_size(valid) < n)
574 goto invalid;
575
576
577 if (!exist)
578 return;
579
580
581 if (valid->start == exist->end + 1
582 || valid->end == exist->start - 1)
583 return;
584
585 invalid:
586
587 valid->end = valid->start - 1;
588}
589
590enum alloc_loc {
591 ALLOC_ERR = 0, ALLOC_BEFORE, ALLOC_MID, ALLOC_AFTER,
592};
593
594static resource_size_t scan_allocate(struct nd_region *nd_region,
595 struct nd_mapping *nd_mapping, struct nd_label_id *label_id,
596 resource_size_t n)
597{
598 resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1;
599 bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0;
600 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
601 struct resource *res, *exist = NULL, valid;
602 const resource_size_t to_allocate = n;
603 int first;
604
605 for_each_dpa_resource(ndd, res)
606 if (strcmp(label_id->id, res->name) == 0)
607 exist = res;
608
609 valid.start = nd_mapping->start;
610 valid.end = mapping_end;
611 valid.name = "free space";
612 retry:
613 first = 0;
614 for_each_dpa_resource(ndd, res) {
615 struct resource *next = res->sibling, *new_res = NULL;
616 resource_size_t allocate, available = 0;
617 enum alloc_loc loc = ALLOC_ERR;
618 const char *action;
619 int rc = 0;
620
621
622 if (res->start > mapping_end)
623 continue;
624 if (res->end < nd_mapping->start)
625 continue;
626
627
628 if (!first++ && res->start > nd_mapping->start) {
629 valid.start = nd_mapping->start;
630 valid.end = res->start - 1;
631 space_valid(nd_region, ndd, label_id, NULL, next, exist,
632 to_allocate, &valid);
633 available = resource_size(&valid);
634 if (available)
635 loc = ALLOC_BEFORE;
636 }
637
638
639 if (!loc && next) {
640 valid.start = res->start + resource_size(res);
641 valid.end = min(mapping_end, next->start - 1);
642 space_valid(nd_region, ndd, label_id, res, next, exist,
643 to_allocate, &valid);
644 available = resource_size(&valid);
645 if (available)
646 loc = ALLOC_MID;
647 }
648
649
650 if (!loc && !next) {
651 valid.start = res->start + resource_size(res);
652 valid.end = mapping_end;
653 space_valid(nd_region, ndd, label_id, res, next, exist,
654 to_allocate, &valid);
655 available = resource_size(&valid);
656 if (available)
657 loc = ALLOC_AFTER;
658 }
659
660 if (!loc || !available)
661 continue;
662 allocate = min(available, n);
663 switch (loc) {
664 case ALLOC_BEFORE:
665 if (strcmp(res->name, label_id->id) == 0) {
666
667 rc = adjust_resource(res, res->start - allocate,
668 resource_size(res) + allocate);
669 action = "cur grow up";
670 } else
671 action = "allocate";
672 break;
673 case ALLOC_MID:
674 if (strcmp(next->name, label_id->id) == 0) {
675
676 rc = adjust_resource(next, next->start
677 - allocate, resource_size(next)
678 + allocate);
679 new_res = next;
680 action = "next grow up";
681 } else if (strcmp(res->name, label_id->id) == 0) {
682 action = "grow down";
683 } else
684 action = "allocate";
685 break;
686 case ALLOC_AFTER:
687 if (strcmp(res->name, label_id->id) == 0)
688 action = "grow down";
689 else
690 action = "allocate";
691 break;
692 default:
693 return n;
694 }
695
696 if (strcmp(action, "allocate") == 0) {
697
698 if (!is_pmem)
699 valid.start += available - allocate;
700
701 new_res = nvdimm_allocate_dpa(ndd, label_id,
702 valid.start, allocate);
703 if (!new_res)
704 rc = -EBUSY;
705 } else if (strcmp(action, "grow down") == 0) {
706
707 rc = adjust_resource(res, res->start, resource_size(res)
708 + allocate);
709 if (rc == 0)
710 res->flags |= DPA_RESOURCE_ADJUSTED;
711 }
712
713 if (!new_res)
714 new_res = res;
715
716 nd_dbg_dpa(nd_region, ndd, new_res, "%s(%d) %d\n",
717 action, loc, rc);
718
719 if (rc)
720 return n;
721
722 n -= allocate;
723 if (n) {
724
725
726
727
728
729
730
731 goto retry;
732 } else
733 return 0;
734 }
735
736
737
738
739
740
741 if ((is_pmem || !ndd->dpa.child) && n == to_allocate)
742 return init_dpa_allocation(label_id, nd_region, nd_mapping, n);
743 return n;
744}
745
746static int merge_dpa(struct nd_region *nd_region,
747 struct nd_mapping *nd_mapping, struct nd_label_id *label_id)
748{
749 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
750 struct resource *res;
751
752 if (strncmp("pmem", label_id->id, 4) == 0)
753 return 0;
754 retry:
755 for_each_dpa_resource(ndd, res) {
756 int rc;
757 struct resource *next = res->sibling;
758 resource_size_t end = res->start + resource_size(res);
759
760 if (!next || strcmp(res->name, label_id->id) != 0
761 || strcmp(next->name, label_id->id) != 0
762 || end != next->start)
763 continue;
764 end += resource_size(next);
765 nvdimm_free_dpa(ndd, next);
766 rc = adjust_resource(res, res->start, end - res->start);
767 nd_dbg_dpa(nd_region, ndd, res, "merge %d\n", rc);
768 if (rc)
769 return rc;
770 res->flags |= DPA_RESOURCE_ADJUSTED;
771 goto retry;
772 }
773
774 return 0;
775}
776
777int __reserve_free_pmem(struct device *dev, void *data)
778{
779 struct nvdimm *nvdimm = data;
780 struct nd_region *nd_region;
781 struct nd_label_id label_id;
782 int i;
783
784 if (!is_memory(dev))
785 return 0;
786
787 nd_region = to_nd_region(dev);
788 if (nd_region->ndr_mappings == 0)
789 return 0;
790
791 memset(&label_id, 0, sizeof(label_id));
792 strcat(label_id.id, "pmem-reserve");
793 for (i = 0; i < nd_region->ndr_mappings; i++) {
794 struct nd_mapping *nd_mapping = &nd_region->mapping[i];
795 resource_size_t n, rem = 0;
796
797 if (nd_mapping->nvdimm != nvdimm)
798 continue;
799
800 n = nd_pmem_available_dpa(nd_region, nd_mapping, &rem);
801 if (n == 0)
802 return 0;
803 rem = scan_allocate(nd_region, nd_mapping, &label_id, n);
804 dev_WARN_ONCE(&nd_region->dev, rem,
805 "pmem reserve underrun: %#llx of %#llx bytes\n",
806 (unsigned long long) n - rem,
807 (unsigned long long) n);
808 return rem ? -ENXIO : 0;
809 }
810
811 return 0;
812}
813
814void release_free_pmem(struct nvdimm_bus *nvdimm_bus,
815 struct nd_mapping *nd_mapping)
816{
817 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
818 struct resource *res, *_res;
819
820 for_each_dpa_resource_safe(ndd, res, _res)
821 if (strcmp(res->name, "pmem-reserve") == 0)
822 nvdimm_free_dpa(ndd, res);
823}
824
825static int reserve_free_pmem(struct nvdimm_bus *nvdimm_bus,
826 struct nd_mapping *nd_mapping)
827{
828 struct nvdimm *nvdimm = nd_mapping->nvdimm;
829 int rc;
830
831 rc = device_for_each_child(&nvdimm_bus->dev, nvdimm,
832 __reserve_free_pmem);
833 if (rc)
834 release_free_pmem(nvdimm_bus, nd_mapping);
835 return rc;
836}
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851static int grow_dpa_allocation(struct nd_region *nd_region,
852 struct nd_label_id *label_id, resource_size_t n)
853{
854 struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev);
855 bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0;
856 int i;
857
858 for (i = 0; i < nd_region->ndr_mappings; i++) {
859 struct nd_mapping *nd_mapping = &nd_region->mapping[i];
860 resource_size_t rem = n;
861 int rc, j;
862
863
864
865
866
867 for (j = is_pmem; j < 2; j++) {
868 bool blk_only = j == 0;
869
870 if (blk_only) {
871 rc = reserve_free_pmem(nvdimm_bus, nd_mapping);
872 if (rc)
873 return rc;
874 }
875 rem = scan_allocate(nd_region, nd_mapping,
876 label_id, rem);
877 if (blk_only)
878 release_free_pmem(nvdimm_bus, nd_mapping);
879
880
881 if (rem == 0)
882 break;
883 }
884
885 dev_WARN_ONCE(&nd_region->dev, rem,
886 "allocation underrun: %#llx of %#llx bytes\n",
887 (unsigned long long) n - rem,
888 (unsigned long long) n);
889 if (rem)
890 return -ENXIO;
891
892 rc = merge_dpa(nd_region, nd_mapping, label_id);
893 if (rc)
894 return rc;
895 }
896
897 return 0;
898}
899
900static void nd_namespace_pmem_set_resource(struct nd_region *nd_region,
901 struct nd_namespace_pmem *nspm, resource_size_t size)
902{
903 struct resource *res = &nspm->nsio.res;
904 resource_size_t offset = 0;
905
906 if (size && !nspm->uuid) {
907 WARN_ON_ONCE(1);
908 size = 0;
909 }
910
911 if (size && nspm->uuid) {
912 struct nd_mapping *nd_mapping = &nd_region->mapping[0];
913 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
914 struct nd_label_id label_id;
915 struct resource *res;
916
917 if (!ndd) {
918 size = 0;
919 goto out;
920 }
921
922 nd_label_gen_id(&label_id, nspm->uuid, 0);
923
924
925 for_each_dpa_resource(ndd, res)
926 if (strcmp(res->name, label_id.id) == 0) {
927 offset = (res->start - nd_mapping->start)
928 * nd_region->ndr_mappings;
929 goto out;
930 }
931
932 WARN_ON_ONCE(1);
933 size = 0;
934 }
935
936 out:
937 res->start = nd_region->ndr_start + offset;
938 res->end = res->start + size - 1;
939}
940
941static bool uuid_not_set(const u8 *uuid, struct device *dev, const char *where)
942{
943 if (!uuid) {
944 dev_dbg(dev, "%s: uuid not set\n", where);
945 return true;
946 }
947 return false;
948}
949
950static ssize_t __size_store(struct device *dev, unsigned long long val)
951{
952 resource_size_t allocated = 0, available = 0;
953 struct nd_region *nd_region = to_nd_region(dev->parent);
954 struct nd_namespace_common *ndns = to_ndns(dev);
955 struct nd_mapping *nd_mapping;
956 struct nvdimm_drvdata *ndd;
957 struct nd_label_id label_id;
958 u32 flags = 0, remainder;
959 int rc, i, id = -1;
960 u8 *uuid = NULL;
961
962 if (dev->driver || ndns->claim)
963 return -EBUSY;
964
965 if (is_namespace_pmem(dev)) {
966 struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
967
968 uuid = nspm->uuid;
969 id = nspm->id;
970 } else if (is_namespace_blk(dev)) {
971 struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
972
973 uuid = nsblk->uuid;
974 flags = NSLABEL_FLAG_LOCAL;
975 id = nsblk->id;
976 }
977
978
979
980
981
982 if (uuid_not_set(uuid, dev, __func__))
983 return -ENXIO;
984 if (nd_region->ndr_mappings == 0) {
985 dev_dbg(dev, "not associated with dimm(s)\n");
986 return -ENXIO;
987 }
988
989 div_u64_rem(val, nd_region->align, &remainder);
990 if (remainder) {
991 dev_dbg(dev, "%llu is not %ldK aligned\n", val,
992 nd_region->align / SZ_1K);
993 return -EINVAL;
994 }
995
996 nd_label_gen_id(&label_id, uuid, flags);
997 for (i = 0; i < nd_region->ndr_mappings; i++) {
998 nd_mapping = &nd_region->mapping[i];
999 ndd = to_ndd(nd_mapping);
1000
1001
1002
1003
1004
1005 if (!ndd)
1006 return -ENXIO;
1007
1008 allocated += nvdimm_allocated_dpa(ndd, &label_id);
1009 }
1010 available = nd_region_allocatable_dpa(nd_region);
1011
1012 if (val > available + allocated)
1013 return -ENOSPC;
1014
1015 if (val == allocated)
1016 return 0;
1017
1018 val = div_u64(val, nd_region->ndr_mappings);
1019 allocated = div_u64(allocated, nd_region->ndr_mappings);
1020 if (val < allocated)
1021 rc = shrink_dpa_allocation(nd_region, &label_id,
1022 allocated - val);
1023 else
1024 rc = grow_dpa_allocation(nd_region, &label_id, val - allocated);
1025
1026 if (rc)
1027 return rc;
1028
1029 if (is_namespace_pmem(dev)) {
1030 struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
1031
1032 nd_namespace_pmem_set_resource(nd_region, nspm,
1033 val * nd_region->ndr_mappings);
1034 }
1035
1036
1037
1038
1039
1040
1041
1042 if (val == 0 && id != 0 && nd_region->ns_seed != dev && !ndns->claim)
1043 nd_device_unregister(dev, ND_ASYNC);
1044
1045 return rc;
1046}
1047
1048static ssize_t size_store(struct device *dev,
1049 struct device_attribute *attr, const char *buf, size_t len)
1050{
1051 struct nd_region *nd_region = to_nd_region(dev->parent);
1052 unsigned long long val;
1053 u8 **uuid = NULL;
1054 int rc;
1055
1056 rc = kstrtoull(buf, 0, &val);
1057 if (rc)
1058 return rc;
1059
1060 nd_device_lock(dev);
1061 nvdimm_bus_lock(dev);
1062 wait_nvdimm_bus_probe_idle(dev);
1063 rc = __size_store(dev, val);
1064 if (rc >= 0)
1065 rc = nd_namespace_label_update(nd_region, dev);
1066
1067 if (is_namespace_pmem(dev)) {
1068 struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
1069
1070 uuid = &nspm->uuid;
1071 } else if (is_namespace_blk(dev)) {
1072 struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
1073
1074 uuid = &nsblk->uuid;
1075 }
1076
1077 if (rc == 0 && val == 0 && uuid) {
1078
1079 kfree(*uuid);
1080 *uuid = NULL;
1081 }
1082
1083 dev_dbg(dev, "%llx %s (%d)\n", val, rc < 0 ? "fail" : "success", rc);
1084
1085 nvdimm_bus_unlock(dev);
1086 nd_device_unlock(dev);
1087
1088 return rc < 0 ? rc : len;
1089}
1090
1091resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns)
1092{
1093 struct device *dev = &ndns->dev;
1094
1095 if (is_namespace_pmem(dev)) {
1096 struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
1097
1098 return resource_size(&nspm->nsio.res);
1099 } else if (is_namespace_blk(dev)) {
1100 return nd_namespace_blk_size(to_nd_namespace_blk(dev));
1101 } else if (is_namespace_io(dev)) {
1102 struct nd_namespace_io *nsio = to_nd_namespace_io(dev);
1103
1104 return resource_size(&nsio->res);
1105 } else
1106 WARN_ONCE(1, "unknown namespace type\n");
1107 return 0;
1108}
1109
1110resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns)
1111{
1112 resource_size_t size;
1113
1114 nvdimm_bus_lock(&ndns->dev);
1115 size = __nvdimm_namespace_capacity(ndns);
1116 nvdimm_bus_unlock(&ndns->dev);
1117
1118 return size;
1119}
1120EXPORT_SYMBOL(nvdimm_namespace_capacity);
1121
1122bool nvdimm_namespace_locked(struct nd_namespace_common *ndns)
1123{
1124 int i;
1125 bool locked = false;
1126 struct device *dev = &ndns->dev;
1127 struct nd_region *nd_region = to_nd_region(dev->parent);
1128
1129 for (i = 0; i < nd_region->ndr_mappings; i++) {
1130 struct nd_mapping *nd_mapping = &nd_region->mapping[i];
1131 struct nvdimm *nvdimm = nd_mapping->nvdimm;
1132
1133 if (test_bit(NDD_LOCKED, &nvdimm->flags)) {
1134 dev_dbg(dev, "%s locked\n", nvdimm_name(nvdimm));
1135 locked = true;
1136 }
1137 }
1138 return locked;
1139}
1140EXPORT_SYMBOL(nvdimm_namespace_locked);
1141
1142static ssize_t size_show(struct device *dev,
1143 struct device_attribute *attr, char *buf)
1144{
1145 return sprintf(buf, "%llu\n", (unsigned long long)
1146 nvdimm_namespace_capacity(to_ndns(dev)));
1147}
1148static DEVICE_ATTR(size, 0444, size_show, size_store);
1149
1150static u8 *namespace_to_uuid(struct device *dev)
1151{
1152 if (is_namespace_pmem(dev)) {
1153 struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
1154
1155 return nspm->uuid;
1156 } else if (is_namespace_blk(dev)) {
1157 struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
1158
1159 return nsblk->uuid;
1160 } else
1161 return ERR_PTR(-ENXIO);
1162}
1163
1164static ssize_t uuid_show(struct device *dev,
1165 struct device_attribute *attr, char *buf)
1166{
1167 u8 *uuid = namespace_to_uuid(dev);
1168
1169 if (IS_ERR(uuid))
1170 return PTR_ERR(uuid);
1171 if (uuid)
1172 return sprintf(buf, "%pUb\n", uuid);
1173 return sprintf(buf, "\n");
1174}
1175
1176
1177
1178
1179
1180
1181
1182
1183static int namespace_update_uuid(struct nd_region *nd_region,
1184 struct device *dev, u8 *new_uuid, u8 **old_uuid)
1185{
1186 u32 flags = is_namespace_blk(dev) ? NSLABEL_FLAG_LOCAL : 0;
1187 struct nd_label_id old_label_id;
1188 struct nd_label_id new_label_id;
1189 int i;
1190
1191 if (!nd_is_uuid_unique(dev, new_uuid))
1192 return -EINVAL;
1193
1194 if (*old_uuid == NULL)
1195 goto out;
1196
1197
1198
1199
1200
1201
1202
1203 for (i = 0; i < nd_region->ndr_mappings; i++) {
1204 struct nd_mapping *nd_mapping = &nd_region->mapping[i];
1205
1206
1207
1208
1209
1210
1211
1212
1213 if (list_empty(&nd_mapping->labels))
1214 return -EBUSY;
1215 }
1216
1217 nd_label_gen_id(&old_label_id, *old_uuid, flags);
1218 nd_label_gen_id(&new_label_id, new_uuid, flags);
1219 for (i = 0; i < nd_region->ndr_mappings; i++) {
1220 struct nd_mapping *nd_mapping = &nd_region->mapping[i];
1221 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
1222 struct nd_label_ent *label_ent;
1223 struct resource *res;
1224
1225 for_each_dpa_resource(ndd, res)
1226 if (strcmp(res->name, old_label_id.id) == 0)
1227 sprintf((void *) res->name, "%s",
1228 new_label_id.id);
1229
1230 mutex_lock(&nd_mapping->lock);
1231 list_for_each_entry(label_ent, &nd_mapping->labels, list) {
1232 struct nd_namespace_label *nd_label = label_ent->label;
1233 struct nd_label_id label_id;
1234
1235 if (!nd_label)
1236 continue;
1237 nd_label_gen_id(&label_id, nd_label->uuid,
1238 nsl_get_flags(ndd, nd_label));
1239 if (strcmp(old_label_id.id, label_id.id) == 0)
1240 set_bit(ND_LABEL_REAP, &label_ent->flags);
1241 }
1242 mutex_unlock(&nd_mapping->lock);
1243 }
1244 kfree(*old_uuid);
1245 out:
1246 *old_uuid = new_uuid;
1247 return 0;
1248}
1249
1250static ssize_t uuid_store(struct device *dev,
1251 struct device_attribute *attr, const char *buf, size_t len)
1252{
1253 struct nd_region *nd_region = to_nd_region(dev->parent);
1254 u8 *uuid = NULL;
1255 ssize_t rc = 0;
1256 u8 **ns_uuid;
1257
1258 if (is_namespace_pmem(dev)) {
1259 struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
1260
1261 ns_uuid = &nspm->uuid;
1262 } else if (is_namespace_blk(dev)) {
1263 struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
1264
1265 ns_uuid = &nsblk->uuid;
1266 } else
1267 return -ENXIO;
1268
1269 nd_device_lock(dev);
1270 nvdimm_bus_lock(dev);
1271 wait_nvdimm_bus_probe_idle(dev);
1272 if (to_ndns(dev)->claim)
1273 rc = -EBUSY;
1274 if (rc >= 0)
1275 rc = nd_uuid_store(dev, &uuid, buf, len);
1276 if (rc >= 0)
1277 rc = namespace_update_uuid(nd_region, dev, uuid, ns_uuid);
1278 if (rc >= 0)
1279 rc = nd_namespace_label_update(nd_region, dev);
1280 else
1281 kfree(uuid);
1282 dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf,
1283 buf[len - 1] == '\n' ? "" : "\n");
1284 nvdimm_bus_unlock(dev);
1285 nd_device_unlock(dev);
1286
1287 return rc < 0 ? rc : len;
1288}
1289static DEVICE_ATTR_RW(uuid);
1290
1291static ssize_t resource_show(struct device *dev,
1292 struct device_attribute *attr, char *buf)
1293{
1294 struct resource *res;
1295
1296 if (is_namespace_pmem(dev)) {
1297 struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
1298
1299 res = &nspm->nsio.res;
1300 } else if (is_namespace_io(dev)) {
1301 struct nd_namespace_io *nsio = to_nd_namespace_io(dev);
1302
1303 res = &nsio->res;
1304 } else
1305 return -ENXIO;
1306
1307
1308 if (resource_size(res) == 0)
1309 return -ENXIO;
1310 return sprintf(buf, "%#llx\n", (unsigned long long) res->start);
1311}
1312static DEVICE_ATTR_ADMIN_RO(resource);
1313
1314static const unsigned long blk_lbasize_supported[] = { 512, 520, 528,
1315 4096, 4104, 4160, 4224, 0 };
1316
1317static const unsigned long pmem_lbasize_supported[] = { 512, 4096, 0 };
1318
1319static ssize_t sector_size_show(struct device *dev,
1320 struct device_attribute *attr, char *buf)
1321{
1322 if (is_namespace_blk(dev)) {
1323 struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
1324
1325 return nd_size_select_show(nsblk->lbasize,
1326 blk_lbasize_supported, buf);
1327 }
1328
1329 if (is_namespace_pmem(dev)) {
1330 struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
1331
1332 return nd_size_select_show(nspm->lbasize,
1333 pmem_lbasize_supported, buf);
1334 }
1335 return -ENXIO;
1336}
1337
1338static ssize_t sector_size_store(struct device *dev,
1339 struct device_attribute *attr, const char *buf, size_t len)
1340{
1341 struct nd_region *nd_region = to_nd_region(dev->parent);
1342 const unsigned long *supported;
1343 unsigned long *lbasize;
1344 ssize_t rc = 0;
1345
1346 if (is_namespace_blk(dev)) {
1347 struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
1348
1349 lbasize = &nsblk->lbasize;
1350 supported = blk_lbasize_supported;
1351 } else if (is_namespace_pmem(dev)) {
1352 struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
1353
1354 lbasize = &nspm->lbasize;
1355 supported = pmem_lbasize_supported;
1356 } else
1357 return -ENXIO;
1358
1359 nd_device_lock(dev);
1360 nvdimm_bus_lock(dev);
1361 if (to_ndns(dev)->claim)
1362 rc = -EBUSY;
1363 if (rc >= 0)
1364 rc = nd_size_select_store(dev, buf, lbasize, supported);
1365 if (rc >= 0)
1366 rc = nd_namespace_label_update(nd_region, dev);
1367 dev_dbg(dev, "result: %zd %s: %s%s", rc, rc < 0 ? "tried" : "wrote",
1368 buf, buf[len - 1] == '\n' ? "" : "\n");
1369 nvdimm_bus_unlock(dev);
1370 nd_device_unlock(dev);
1371
1372 return rc ? rc : len;
1373}
1374static DEVICE_ATTR_RW(sector_size);
1375
1376static ssize_t dpa_extents_show(struct device *dev,
1377 struct device_attribute *attr, char *buf)
1378{
1379 struct nd_region *nd_region = to_nd_region(dev->parent);
1380 struct nd_label_id label_id;
1381 int count = 0, i;
1382 u8 *uuid = NULL;
1383 u32 flags = 0;
1384
1385 nvdimm_bus_lock(dev);
1386 if (is_namespace_pmem(dev)) {
1387 struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
1388
1389 uuid = nspm->uuid;
1390 flags = 0;
1391 } else if (is_namespace_blk(dev)) {
1392 struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
1393
1394 uuid = nsblk->uuid;
1395 flags = NSLABEL_FLAG_LOCAL;
1396 }
1397
1398 if (!uuid)
1399 goto out;
1400
1401 nd_label_gen_id(&label_id, uuid, flags);
1402 for (i = 0; i < nd_region->ndr_mappings; i++) {
1403 struct nd_mapping *nd_mapping = &nd_region->mapping[i];
1404 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
1405 struct resource *res;
1406
1407 for_each_dpa_resource(ndd, res)
1408 if (strcmp(res->name, label_id.id) == 0)
1409 count++;
1410 }
1411 out:
1412 nvdimm_bus_unlock(dev);
1413
1414 return sprintf(buf, "%d\n", count);
1415}
1416static DEVICE_ATTR_RO(dpa_extents);
1417
1418static int btt_claim_class(struct device *dev)
1419{
1420 struct nd_region *nd_region = to_nd_region(dev->parent);
1421 int i, loop_bitmask = 0;
1422
1423 for (i = 0; i < nd_region->ndr_mappings; i++) {
1424 struct nd_mapping *nd_mapping = &nd_region->mapping[i];
1425 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
1426 struct nd_namespace_index *nsindex;
1427
1428
1429
1430
1431
1432 if (!ndd) {
1433 loop_bitmask = 0;
1434 break;
1435 }
1436
1437 nsindex = to_namespace_index(ndd, ndd->ns_current);
1438 if (nsindex == NULL)
1439 loop_bitmask |= 1;
1440 else {
1441
1442 if (__le16_to_cpu(nsindex->major) == 1
1443 && __le16_to_cpu(nsindex->minor) == 1)
1444 loop_bitmask |= 2;
1445 else
1446 loop_bitmask |= 4;
1447 }
1448 }
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467 switch (loop_bitmask) {
1468 case 0:
1469 case 2:
1470 return NVDIMM_CCLASS_BTT;
1471 case 1:
1472 case 4:
1473 return NVDIMM_CCLASS_BTT2;
1474 default:
1475 return -ENXIO;
1476 }
1477}
1478
1479static ssize_t holder_show(struct device *dev,
1480 struct device_attribute *attr, char *buf)
1481{
1482 struct nd_namespace_common *ndns = to_ndns(dev);
1483 ssize_t rc;
1484
1485 nd_device_lock(dev);
1486 rc = sprintf(buf, "%s\n", ndns->claim ? dev_name(ndns->claim) : "");
1487 nd_device_unlock(dev);
1488
1489 return rc;
1490}
1491static DEVICE_ATTR_RO(holder);
1492
1493static int __holder_class_store(struct device *dev, const char *buf)
1494{
1495 struct nd_namespace_common *ndns = to_ndns(dev);
1496
1497 if (dev->driver || ndns->claim)
1498 return -EBUSY;
1499
1500 if (sysfs_streq(buf, "btt")) {
1501 int rc = btt_claim_class(dev);
1502
1503 if (rc < NVDIMM_CCLASS_NONE)
1504 return rc;
1505 ndns->claim_class = rc;
1506 } else if (sysfs_streq(buf, "pfn"))
1507 ndns->claim_class = NVDIMM_CCLASS_PFN;
1508 else if (sysfs_streq(buf, "dax"))
1509 ndns->claim_class = NVDIMM_CCLASS_DAX;
1510 else if (sysfs_streq(buf, ""))
1511 ndns->claim_class = NVDIMM_CCLASS_NONE;
1512 else
1513 return -EINVAL;
1514
1515 return 0;
1516}
1517
1518static ssize_t holder_class_store(struct device *dev,
1519 struct device_attribute *attr, const char *buf, size_t len)
1520{
1521 struct nd_region *nd_region = to_nd_region(dev->parent);
1522 int rc;
1523
1524 nd_device_lock(dev);
1525 nvdimm_bus_lock(dev);
1526 wait_nvdimm_bus_probe_idle(dev);
1527 rc = __holder_class_store(dev, buf);
1528 if (rc >= 0)
1529 rc = nd_namespace_label_update(nd_region, dev);
1530 dev_dbg(dev, "%s(%d)\n", rc < 0 ? "fail " : "", rc);
1531 nvdimm_bus_unlock(dev);
1532 nd_device_unlock(dev);
1533
1534 return rc < 0 ? rc : len;
1535}
1536
1537static ssize_t holder_class_show(struct device *dev,
1538 struct device_attribute *attr, char *buf)
1539{
1540 struct nd_namespace_common *ndns = to_ndns(dev);
1541 ssize_t rc;
1542
1543 nd_device_lock(dev);
1544 if (ndns->claim_class == NVDIMM_CCLASS_NONE)
1545 rc = sprintf(buf, "\n");
1546 else if ((ndns->claim_class == NVDIMM_CCLASS_BTT) ||
1547 (ndns->claim_class == NVDIMM_CCLASS_BTT2))
1548 rc = sprintf(buf, "btt\n");
1549 else if (ndns->claim_class == NVDIMM_CCLASS_PFN)
1550 rc = sprintf(buf, "pfn\n");
1551 else if (ndns->claim_class == NVDIMM_CCLASS_DAX)
1552 rc = sprintf(buf, "dax\n");
1553 else
1554 rc = sprintf(buf, "<unknown>\n");
1555 nd_device_unlock(dev);
1556
1557 return rc;
1558}
1559static DEVICE_ATTR_RW(holder_class);
1560
1561static ssize_t mode_show(struct device *dev,
1562 struct device_attribute *attr, char *buf)
1563{
1564 struct nd_namespace_common *ndns = to_ndns(dev);
1565 struct device *claim;
1566 char *mode;
1567 ssize_t rc;
1568
1569 nd_device_lock(dev);
1570 claim = ndns->claim;
1571 if (claim && is_nd_btt(claim))
1572 mode = "safe";
1573 else if (claim && is_nd_pfn(claim))
1574 mode = "memory";
1575 else if (claim && is_nd_dax(claim))
1576 mode = "dax";
1577 else if (!claim && pmem_should_map_pages(dev))
1578 mode = "memory";
1579 else
1580 mode = "raw";
1581 rc = sprintf(buf, "%s\n", mode);
1582 nd_device_unlock(dev);
1583
1584 return rc;
1585}
1586static DEVICE_ATTR_RO(mode);
1587
1588static ssize_t force_raw_store(struct device *dev,
1589 struct device_attribute *attr, const char *buf, size_t len)
1590{
1591 bool force_raw;
1592 int rc = strtobool(buf, &force_raw);
1593
1594 if (rc)
1595 return rc;
1596
1597 to_ndns(dev)->force_raw = force_raw;
1598 return len;
1599}
1600
1601static ssize_t force_raw_show(struct device *dev,
1602 struct device_attribute *attr, char *buf)
1603{
1604 return sprintf(buf, "%d\n", to_ndns(dev)->force_raw);
1605}
1606static DEVICE_ATTR_RW(force_raw);
1607
1608static struct attribute *nd_namespace_attributes[] = {
1609 &dev_attr_nstype.attr,
1610 &dev_attr_size.attr,
1611 &dev_attr_mode.attr,
1612 &dev_attr_uuid.attr,
1613 &dev_attr_holder.attr,
1614 &dev_attr_resource.attr,
1615 &dev_attr_alt_name.attr,
1616 &dev_attr_force_raw.attr,
1617 &dev_attr_sector_size.attr,
1618 &dev_attr_dpa_extents.attr,
1619 &dev_attr_holder_class.attr,
1620 NULL,
1621};
1622
1623static umode_t namespace_visible(struct kobject *kobj,
1624 struct attribute *a, int n)
1625{
1626 struct device *dev = container_of(kobj, struct device, kobj);
1627
1628 if (a == &dev_attr_resource.attr && is_namespace_blk(dev))
1629 return 0;
1630
1631 if (is_namespace_pmem(dev) || is_namespace_blk(dev)) {
1632 if (a == &dev_attr_size.attr)
1633 return 0644;
1634
1635 return a->mode;
1636 }
1637
1638
1639 if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr ||
1640 a == &dev_attr_holder.attr || a == &dev_attr_holder_class.attr ||
1641 a == &dev_attr_force_raw.attr || a == &dev_attr_mode.attr ||
1642 a == &dev_attr_resource.attr)
1643 return a->mode;
1644
1645 return 0;
1646}
1647
1648static struct attribute_group nd_namespace_attribute_group = {
1649 .attrs = nd_namespace_attributes,
1650 .is_visible = namespace_visible,
1651};
1652
1653static const struct attribute_group *nd_namespace_attribute_groups[] = {
1654 &nd_device_attribute_group,
1655 &nd_namespace_attribute_group,
1656 &nd_numa_attribute_group,
1657 NULL,
1658};
1659
1660static const struct device_type namespace_io_device_type = {
1661 .name = "nd_namespace_io",
1662 .release = namespace_io_release,
1663 .groups = nd_namespace_attribute_groups,
1664};
1665
1666static const struct device_type namespace_pmem_device_type = {
1667 .name = "nd_namespace_pmem",
1668 .release = namespace_pmem_release,
1669 .groups = nd_namespace_attribute_groups,
1670};
1671
1672static const struct device_type namespace_blk_device_type = {
1673 .name = "nd_namespace_blk",
1674 .release = namespace_blk_release,
1675 .groups = nd_namespace_attribute_groups,
1676};
1677
1678static bool is_namespace_pmem(const struct device *dev)
1679{
1680 return dev ? dev->type == &namespace_pmem_device_type : false;
1681}
1682
1683static bool is_namespace_blk(const struct device *dev)
1684{
1685 return dev ? dev->type == &namespace_blk_device_type : false;
1686}
1687
1688static bool is_namespace_io(const struct device *dev)
1689{
1690 return dev ? dev->type == &namespace_io_device_type : false;
1691}
1692
1693struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev)
1694{
1695 struct nd_btt *nd_btt = is_nd_btt(dev) ? to_nd_btt(dev) : NULL;
1696 struct nd_pfn *nd_pfn = is_nd_pfn(dev) ? to_nd_pfn(dev) : NULL;
1697 struct nd_dax *nd_dax = is_nd_dax(dev) ? to_nd_dax(dev) : NULL;
1698 struct nd_namespace_common *ndns = NULL;
1699 resource_size_t size;
1700
1701 if (nd_btt || nd_pfn || nd_dax) {
1702 if (nd_btt)
1703 ndns = nd_btt->ndns;
1704 else if (nd_pfn)
1705 ndns = nd_pfn->ndns;
1706 else if (nd_dax)
1707 ndns = nd_dax->nd_pfn.ndns;
1708
1709 if (!ndns)
1710 return ERR_PTR(-ENODEV);
1711
1712
1713
1714
1715
1716 nd_device_lock(&ndns->dev);
1717 nd_device_unlock(&ndns->dev);
1718 if (ndns->dev.driver) {
1719 dev_dbg(&ndns->dev, "is active, can't bind %s\n",
1720 dev_name(dev));
1721 return ERR_PTR(-EBUSY);
1722 }
1723 if (dev_WARN_ONCE(&ndns->dev, ndns->claim != dev,
1724 "host (%s) vs claim (%s) mismatch\n",
1725 dev_name(dev),
1726 dev_name(ndns->claim)))
1727 return ERR_PTR(-ENXIO);
1728 } else {
1729 ndns = to_ndns(dev);
1730 if (ndns->claim) {
1731 dev_dbg(dev, "claimed by %s, failing probe\n",
1732 dev_name(ndns->claim));
1733
1734 return ERR_PTR(-ENXIO);
1735 }
1736 }
1737
1738 if (nvdimm_namespace_locked(ndns))
1739 return ERR_PTR(-EACCES);
1740
1741 size = nvdimm_namespace_capacity(ndns);
1742 if (size < ND_MIN_NAMESPACE_SIZE) {
1743 dev_dbg(&ndns->dev, "%pa, too small must be at least %#x\n",
1744 &size, ND_MIN_NAMESPACE_SIZE);
1745 return ERR_PTR(-ENODEV);
1746 }
1747
1748
1749
1750
1751
1752
1753 if (pmem_should_map_pages(dev)) {
1754 struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev);
1755 struct resource *res = &nsio->res;
1756
1757 if (!IS_ALIGNED(res->start | (res->end + 1),
1758 memremap_compat_align())) {
1759 dev_err(&ndns->dev, "%pr misaligned, unable to map\n", res);
1760 return ERR_PTR(-EOPNOTSUPP);
1761 }
1762 }
1763
1764 if (is_namespace_pmem(&ndns->dev)) {
1765 struct nd_namespace_pmem *nspm;
1766
1767 nspm = to_nd_namespace_pmem(&ndns->dev);
1768 if (uuid_not_set(nspm->uuid, &ndns->dev, __func__))
1769 return ERR_PTR(-ENODEV);
1770 } else if (is_namespace_blk(&ndns->dev)) {
1771 struct nd_namespace_blk *nsblk;
1772
1773 nsblk = to_nd_namespace_blk(&ndns->dev);
1774 if (uuid_not_set(nsblk->uuid, &ndns->dev, __func__))
1775 return ERR_PTR(-ENODEV);
1776 if (!nsblk->lbasize) {
1777 dev_dbg(&ndns->dev, "sector size not set\n");
1778 return ERR_PTR(-ENODEV);
1779 }
1780 if (!nd_namespace_blk_validate(nsblk))
1781 return ERR_PTR(-ENODEV);
1782 }
1783
1784 return ndns;
1785}
1786EXPORT_SYMBOL(nvdimm_namespace_common_probe);
1787
1788int devm_namespace_enable(struct device *dev, struct nd_namespace_common *ndns,
1789 resource_size_t size)
1790{
1791 if (is_namespace_blk(&ndns->dev))
1792 return 0;
1793 return devm_nsio_enable(dev, to_nd_namespace_io(&ndns->dev), size);
1794}
1795EXPORT_SYMBOL_GPL(devm_namespace_enable);
1796
1797void devm_namespace_disable(struct device *dev, struct nd_namespace_common *ndns)
1798{
1799 if (is_namespace_blk(&ndns->dev))
1800 return;
1801 devm_nsio_disable(dev, to_nd_namespace_io(&ndns->dev));
1802}
1803EXPORT_SYMBOL_GPL(devm_namespace_disable);
1804
1805static struct device **create_namespace_io(struct nd_region *nd_region)
1806{
1807 struct nd_namespace_io *nsio;
1808 struct device *dev, **devs;
1809 struct resource *res;
1810
1811 nsio = kzalloc(sizeof(*nsio), GFP_KERNEL);
1812 if (!nsio)
1813 return NULL;
1814
1815 devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL);
1816 if (!devs) {
1817 kfree(nsio);
1818 return NULL;
1819 }
1820
1821 dev = &nsio->common.dev;
1822 dev->type = &namespace_io_device_type;
1823 dev->parent = &nd_region->dev;
1824 res = &nsio->res;
1825 res->name = dev_name(&nd_region->dev);
1826 res->flags = IORESOURCE_MEM;
1827 res->start = nd_region->ndr_start;
1828 res->end = res->start + nd_region->ndr_size - 1;
1829
1830 devs[0] = dev;
1831 return devs;
1832}
1833
1834static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid,
1835 u64 cookie, u16 pos)
1836{
1837 struct nd_namespace_label *found = NULL;
1838 int i;
1839
1840 for (i = 0; i < nd_region->ndr_mappings; i++) {
1841 struct nd_mapping *nd_mapping = &nd_region->mapping[i];
1842 struct nd_interleave_set *nd_set = nd_region->nd_set;
1843 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
1844 struct nd_label_ent *label_ent;
1845 bool found_uuid = false;
1846
1847 list_for_each_entry(label_ent, &nd_mapping->labels, list) {
1848 struct nd_namespace_label *nd_label = label_ent->label;
1849 u16 position, nlabel;
1850
1851 if (!nd_label)
1852 continue;
1853 position = nsl_get_position(ndd, nd_label);
1854 nlabel = nsl_get_nlabel(ndd, nd_label);
1855
1856 if (!nsl_validate_isetcookie(ndd, nd_label, cookie))
1857 continue;
1858
1859 if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0)
1860 continue;
1861
1862 if (!nsl_validate_type_guid(ndd, nd_label,
1863 &nd_set->type_guid))
1864 continue;
1865
1866 if (found_uuid) {
1867 dev_dbg(ndd->dev, "duplicate entry for uuid\n");
1868 return false;
1869 }
1870 found_uuid = true;
1871 if (nlabel != nd_region->ndr_mappings)
1872 continue;
1873 if (position != pos)
1874 continue;
1875 found = nd_label;
1876 break;
1877 }
1878 if (found)
1879 break;
1880 }
1881 return found != NULL;
1882}
1883
1884static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id)
1885{
1886 int i;
1887
1888 if (!pmem_id)
1889 return -ENODEV;
1890
1891 for (i = 0; i < nd_region->ndr_mappings; i++) {
1892 struct nd_mapping *nd_mapping = &nd_region->mapping[i];
1893 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
1894 struct nd_namespace_label *nd_label = NULL;
1895 u64 hw_start, hw_end, pmem_start, pmem_end;
1896 struct nd_label_ent *label_ent;
1897
1898 lockdep_assert_held(&nd_mapping->lock);
1899 list_for_each_entry(label_ent, &nd_mapping->labels, list) {
1900 nd_label = label_ent->label;
1901 if (!nd_label)
1902 continue;
1903 if (memcmp(nd_label->uuid, pmem_id, NSLABEL_UUID_LEN) == 0)
1904 break;
1905 nd_label = NULL;
1906 }
1907
1908 if (!nd_label) {
1909 WARN_ON(1);
1910 return -EINVAL;
1911 }
1912
1913
1914
1915
1916
1917 hw_start = nd_mapping->start;
1918 hw_end = hw_start + nd_mapping->size;
1919 pmem_start = nsl_get_dpa(ndd, nd_label);
1920 pmem_end = pmem_start + nsl_get_rawsize(ndd, nd_label);
1921 if (pmem_start >= hw_start && pmem_start < hw_end
1922 && pmem_end <= hw_end && pmem_end > hw_start)
1923 ;
1924 else {
1925 dev_dbg(&nd_region->dev, "%s invalid label for %pUb\n",
1926 dev_name(ndd->dev), nd_label->uuid);
1927 return -EINVAL;
1928 }
1929
1930
1931 list_move(&label_ent->list, &nd_mapping->labels);
1932 }
1933 return 0;
1934}
1935
1936
1937
1938
1939
1940
1941
1942static struct device *create_namespace_pmem(struct nd_region *nd_region,
1943 struct nd_mapping *nd_mapping,
1944 struct nd_namespace_label *nd_label)
1945{
1946 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
1947 struct nd_namespace_index *nsindex =
1948 to_namespace_index(ndd, ndd->ns_current);
1949 u64 cookie = nd_region_interleave_set_cookie(nd_region, nsindex);
1950 u64 altcookie = nd_region_interleave_set_altcookie(nd_region);
1951 struct nd_label_ent *label_ent;
1952 struct nd_namespace_pmem *nspm;
1953 resource_size_t size = 0;
1954 struct resource *res;
1955 struct device *dev;
1956 int rc = 0;
1957 u16 i;
1958
1959 if (cookie == 0) {
1960 dev_dbg(&nd_region->dev, "invalid interleave-set-cookie\n");
1961 return ERR_PTR(-ENXIO);
1962 }
1963
1964 if (!nsl_validate_isetcookie(ndd, nd_label, cookie)) {
1965 dev_dbg(&nd_region->dev, "invalid cookie in label: %pUb\n",
1966 nd_label->uuid);
1967 if (!nsl_validate_isetcookie(ndd, nd_label, altcookie))
1968 return ERR_PTR(-EAGAIN);
1969
1970 dev_dbg(&nd_region->dev, "valid altcookie in label: %pUb\n",
1971 nd_label->uuid);
1972 }
1973
1974 nspm = kzalloc(sizeof(*nspm), GFP_KERNEL);
1975 if (!nspm)
1976 return ERR_PTR(-ENOMEM);
1977
1978 nspm->id = -1;
1979 dev = &nspm->nsio.common.dev;
1980 dev->type = &namespace_pmem_device_type;
1981 dev->parent = &nd_region->dev;
1982 res = &nspm->nsio.res;
1983 res->name = dev_name(&nd_region->dev);
1984 res->flags = IORESOURCE_MEM;
1985
1986 for (i = 0; i < nd_region->ndr_mappings; i++) {
1987 if (has_uuid_at_pos(nd_region, nd_label->uuid, cookie, i))
1988 continue;
1989 if (has_uuid_at_pos(nd_region, nd_label->uuid, altcookie, i))
1990 continue;
1991 break;
1992 }
1993
1994 if (i < nd_region->ndr_mappings) {
1995 struct nvdimm *nvdimm = nd_region->mapping[i].nvdimm;
1996
1997
1998
1999
2000
2001
2002 dev_err(&nd_region->dev, "%s missing label for %pUb\n",
2003 nvdimm_name(nvdimm), nd_label->uuid);
2004 rc = -EINVAL;
2005 goto err;
2006 }
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016 rc = select_pmem_id(nd_region, nd_label->uuid);
2017 if (rc)
2018 goto err;
2019
2020
2021 for (i = 0; i < nd_region->ndr_mappings; i++) {
2022 struct nd_namespace_label *label0;
2023 struct nvdimm_drvdata *ndd;
2024
2025 nd_mapping = &nd_region->mapping[i];
2026 label_ent = list_first_entry_or_null(&nd_mapping->labels,
2027 typeof(*label_ent), list);
2028 label0 = label_ent ? label_ent->label : NULL;
2029
2030 if (!label0) {
2031 WARN_ON(1);
2032 continue;
2033 }
2034
2035 ndd = to_ndd(nd_mapping);
2036 size += nsl_get_rawsize(ndd, label0);
2037 if (nsl_get_position(ndd, label0) != 0)
2038 continue;
2039 WARN_ON(nspm->alt_name || nspm->uuid);
2040 nspm->alt_name = kmemdup(nsl_ref_name(ndd, label0),
2041 NSLABEL_NAME_LEN, GFP_KERNEL);
2042 nspm->uuid = kmemdup((void __force *) label0->uuid,
2043 NSLABEL_UUID_LEN, GFP_KERNEL);
2044 nspm->lbasize = nsl_get_lbasize(ndd, label0);
2045 nspm->nsio.common.claim_class =
2046 nsl_get_claim_class(ndd, label0);
2047 }
2048
2049 if (!nspm->alt_name || !nspm->uuid) {
2050 rc = -ENOMEM;
2051 goto err;
2052 }
2053
2054 nd_namespace_pmem_set_resource(nd_region, nspm, size);
2055
2056 return dev;
2057 err:
2058 namespace_pmem_release(dev);
2059 switch (rc) {
2060 case -EINVAL:
2061 dev_dbg(&nd_region->dev, "invalid label(s)\n");
2062 break;
2063 case -ENODEV:
2064 dev_dbg(&nd_region->dev, "label not found\n");
2065 break;
2066 default:
2067 dev_dbg(&nd_region->dev, "unexpected err: %d\n", rc);
2068 break;
2069 }
2070 return ERR_PTR(rc);
2071}
2072
2073struct resource *nsblk_add_resource(struct nd_region *nd_region,
2074 struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk,
2075 resource_size_t start)
2076{
2077 struct nd_label_id label_id;
2078 struct resource *res;
2079
2080 nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL);
2081 res = krealloc(nsblk->res,
2082 sizeof(void *) * (nsblk->num_resources + 1),
2083 GFP_KERNEL);
2084 if (!res)
2085 return NULL;
2086 nsblk->res = (struct resource **) res;
2087 for_each_dpa_resource(ndd, res)
2088 if (strcmp(res->name, label_id.id) == 0
2089 && res->start == start) {
2090 nsblk->res[nsblk->num_resources++] = res;
2091 return res;
2092 }
2093 return NULL;
2094}
2095
2096static struct device *nd_namespace_blk_create(struct nd_region *nd_region)
2097{
2098 struct nd_namespace_blk *nsblk;
2099 struct device *dev;
2100
2101 if (!is_nd_blk(&nd_region->dev))
2102 return NULL;
2103
2104 nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL);
2105 if (!nsblk)
2106 return NULL;
2107
2108 dev = &nsblk->common.dev;
2109 dev->type = &namespace_blk_device_type;
2110 nsblk->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL);
2111 if (nsblk->id < 0) {
2112 kfree(nsblk);
2113 return NULL;
2114 }
2115 dev_set_name(dev, "namespace%d.%d", nd_region->id, nsblk->id);
2116 dev->parent = &nd_region->dev;
2117
2118 return &nsblk->common.dev;
2119}
2120
2121static struct device *nd_namespace_pmem_create(struct nd_region *nd_region)
2122{
2123 struct nd_namespace_pmem *nspm;
2124 struct resource *res;
2125 struct device *dev;
2126
2127 if (!is_memory(&nd_region->dev))
2128 return NULL;
2129
2130 nspm = kzalloc(sizeof(*nspm), GFP_KERNEL);
2131 if (!nspm)
2132 return NULL;
2133
2134 dev = &nspm->nsio.common.dev;
2135 dev->type = &namespace_pmem_device_type;
2136 dev->parent = &nd_region->dev;
2137 res = &nspm->nsio.res;
2138 res->name = dev_name(&nd_region->dev);
2139 res->flags = IORESOURCE_MEM;
2140
2141 nspm->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL);
2142 if (nspm->id < 0) {
2143 kfree(nspm);
2144 return NULL;
2145 }
2146 dev_set_name(dev, "namespace%d.%d", nd_region->id, nspm->id);
2147 nd_namespace_pmem_set_resource(nd_region, nspm, 0);
2148
2149 return dev;
2150}
2151
2152void nd_region_create_ns_seed(struct nd_region *nd_region)
2153{
2154 WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev));
2155
2156 if (nd_region_to_nstype(nd_region) == ND_DEVICE_NAMESPACE_IO)
2157 return;
2158
2159 if (is_nd_blk(&nd_region->dev))
2160 nd_region->ns_seed = nd_namespace_blk_create(nd_region);
2161 else
2162 nd_region->ns_seed = nd_namespace_pmem_create(nd_region);
2163
2164
2165
2166
2167
2168 if (!nd_region->ns_seed)
2169 dev_err(&nd_region->dev, "failed to create %s namespace\n",
2170 is_nd_blk(&nd_region->dev) ? "blk" : "pmem");
2171 else
2172 nd_device_register(nd_region->ns_seed);
2173}
2174
2175void nd_region_create_dax_seed(struct nd_region *nd_region)
2176{
2177 WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev));
2178 nd_region->dax_seed = nd_dax_create(nd_region);
2179
2180
2181
2182
2183 if (!nd_region->dax_seed)
2184 dev_err(&nd_region->dev, "failed to create dax namespace\n");
2185}
2186
2187void nd_region_create_pfn_seed(struct nd_region *nd_region)
2188{
2189 WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev));
2190 nd_region->pfn_seed = nd_pfn_create(nd_region);
2191
2192
2193
2194
2195 if (!nd_region->pfn_seed)
2196 dev_err(&nd_region->dev, "failed to create pfn namespace\n");
2197}
2198
2199void nd_region_create_btt_seed(struct nd_region *nd_region)
2200{
2201 WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev));
2202 nd_region->btt_seed = nd_btt_create(nd_region);
2203
2204
2205
2206
2207 if (!nd_region->btt_seed)
2208 dev_err(&nd_region->dev, "failed to create btt namespace\n");
2209}
2210
2211static int add_namespace_resource(struct nd_region *nd_region,
2212 struct nd_namespace_label *nd_label, struct device **devs,
2213 int count)
2214{
2215 struct nd_mapping *nd_mapping = &nd_region->mapping[0];
2216 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
2217 int i;
2218
2219 for (i = 0; i < count; i++) {
2220 u8 *uuid = namespace_to_uuid(devs[i]);
2221 struct resource *res;
2222
2223 if (IS_ERR_OR_NULL(uuid)) {
2224 WARN_ON(1);
2225 continue;
2226 }
2227
2228 if (memcmp(uuid, nd_label->uuid, NSLABEL_UUID_LEN) != 0)
2229 continue;
2230 if (is_namespace_blk(devs[i])) {
2231 res = nsblk_add_resource(nd_region, ndd,
2232 to_nd_namespace_blk(devs[i]),
2233 nsl_get_dpa(ndd, nd_label));
2234 if (!res)
2235 return -ENXIO;
2236 nd_dbg_dpa(nd_region, ndd, res, "%d assign\n", count);
2237 } else {
2238 dev_err(&nd_region->dev,
2239 "error: conflicting extents for uuid: %pUb\n",
2240 nd_label->uuid);
2241 return -ENXIO;
2242 }
2243 break;
2244 }
2245
2246 return i;
2247}
2248
2249static struct device *create_namespace_blk(struct nd_region *nd_region,
2250 struct nd_namespace_label *nd_label, int count)
2251{
2252
2253 struct nd_mapping *nd_mapping = &nd_region->mapping[0];
2254 struct nd_interleave_set *nd_set = nd_region->nd_set;
2255 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
2256 struct nd_namespace_blk *nsblk;
2257 char name[NSLABEL_NAME_LEN];
2258 struct device *dev = NULL;
2259 struct resource *res;
2260
2261 if (!nsl_validate_type_guid(ndd, nd_label, &nd_set->type_guid))
2262 return ERR_PTR(-EAGAIN);
2263 if (!nsl_validate_blk_isetcookie(ndd, nd_label, nd_set->cookie2))
2264 return ERR_PTR(-EAGAIN);
2265
2266 nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL);
2267 if (!nsblk)
2268 return ERR_PTR(-ENOMEM);
2269 dev = &nsblk->common.dev;
2270 dev->type = &namespace_blk_device_type;
2271 dev->parent = &nd_region->dev;
2272 nsblk->id = -1;
2273 nsblk->lbasize = nsl_get_lbasize(ndd, nd_label);
2274 nsblk->uuid = kmemdup(nd_label->uuid, NSLABEL_UUID_LEN, GFP_KERNEL);
2275 nsblk->common.claim_class = nsl_get_claim_class(ndd, nd_label);
2276 if (!nsblk->uuid)
2277 goto blk_err;
2278 nsl_get_name(ndd, nd_label, name);
2279 if (name[0]) {
2280 nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN, GFP_KERNEL);
2281 if (!nsblk->alt_name)
2282 goto blk_err;
2283 }
2284 res = nsblk_add_resource(nd_region, ndd, nsblk,
2285 nsl_get_dpa(ndd, nd_label));
2286 if (!res)
2287 goto blk_err;
2288 nd_dbg_dpa(nd_region, ndd, res, "%d: assign\n", count);
2289 return dev;
2290 blk_err:
2291 namespace_blk_release(dev);
2292 return ERR_PTR(-ENXIO);
2293}
2294
2295static int cmp_dpa(const void *a, const void *b)
2296{
2297 const struct device *dev_a = *(const struct device **) a;
2298 const struct device *dev_b = *(const struct device **) b;
2299 struct nd_namespace_blk *nsblk_a, *nsblk_b;
2300 struct nd_namespace_pmem *nspm_a, *nspm_b;
2301
2302 if (is_namespace_io(dev_a))
2303 return 0;
2304
2305 if (is_namespace_blk(dev_a)) {
2306 nsblk_a = to_nd_namespace_blk(dev_a);
2307 nsblk_b = to_nd_namespace_blk(dev_b);
2308
2309 return memcmp(&nsblk_a->res[0]->start, &nsblk_b->res[0]->start,
2310 sizeof(resource_size_t));
2311 }
2312
2313 nspm_a = to_nd_namespace_pmem(dev_a);
2314 nspm_b = to_nd_namespace_pmem(dev_b);
2315
2316 return memcmp(&nspm_a->nsio.res.start, &nspm_b->nsio.res.start,
2317 sizeof(resource_size_t));
2318}
2319
2320static struct device **scan_labels(struct nd_region *nd_region)
2321{
2322 int i, count = 0;
2323 struct device *dev, **devs = NULL;
2324 struct nd_label_ent *label_ent, *e;
2325 struct nd_mapping *nd_mapping = &nd_region->mapping[0];
2326 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
2327 resource_size_t map_end = nd_mapping->start + nd_mapping->size - 1;
2328
2329
2330 list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) {
2331 struct nd_namespace_label *nd_label = label_ent->label;
2332 struct device **__devs;
2333 u32 flags;
2334
2335 if (!nd_label)
2336 continue;
2337 flags = nsl_get_flags(ndd, nd_label);
2338 if (is_nd_blk(&nd_region->dev)
2339 == !!(flags & NSLABEL_FLAG_LOCAL))
2340 ;
2341 else
2342 continue;
2343
2344
2345 if (nsl_get_dpa(ndd, nd_label) < nd_mapping->start ||
2346 nsl_get_dpa(ndd, nd_label) > map_end)
2347 continue;
2348
2349 i = add_namespace_resource(nd_region, nd_label, devs, count);
2350 if (i < 0)
2351 goto err;
2352 if (i < count)
2353 continue;
2354 __devs = kcalloc(count + 2, sizeof(dev), GFP_KERNEL);
2355 if (!__devs)
2356 goto err;
2357 memcpy(__devs, devs, sizeof(dev) * count);
2358 kfree(devs);
2359 devs = __devs;
2360
2361 if (is_nd_blk(&nd_region->dev))
2362 dev = create_namespace_blk(nd_region, nd_label, count);
2363 else
2364 dev = create_namespace_pmem(nd_region, nd_mapping,
2365 nd_label);
2366
2367 if (IS_ERR(dev)) {
2368 switch (PTR_ERR(dev)) {
2369 case -EAGAIN:
2370
2371 continue;
2372 case -ENODEV:
2373
2374 break;
2375 default:
2376 goto err;
2377 }
2378 } else
2379 devs[count++] = dev;
2380
2381 }
2382
2383 dev_dbg(&nd_region->dev, "discovered %d %s namespace%s\n",
2384 count, is_nd_blk(&nd_region->dev)
2385 ? "blk" : "pmem", count == 1 ? "" : "s");
2386
2387 if (count == 0) {
2388
2389 nd_mapping_free_labels(nd_mapping);
2390
2391 devs = kcalloc(2, sizeof(dev), GFP_KERNEL);
2392 if (!devs)
2393 goto err;
2394 if (is_nd_blk(&nd_region->dev)) {
2395 struct nd_namespace_blk *nsblk;
2396
2397 nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL);
2398 if (!nsblk)
2399 goto err;
2400 dev = &nsblk->common.dev;
2401 dev->type = &namespace_blk_device_type;
2402 } else {
2403 struct nd_namespace_pmem *nspm;
2404
2405 nspm = kzalloc(sizeof(*nspm), GFP_KERNEL);
2406 if (!nspm)
2407 goto err;
2408 dev = &nspm->nsio.common.dev;
2409 dev->type = &namespace_pmem_device_type;
2410 nd_namespace_pmem_set_resource(nd_region, nspm, 0);
2411 }
2412 dev->parent = &nd_region->dev;
2413 devs[count++] = dev;
2414 } else if (is_memory(&nd_region->dev)) {
2415
2416 for (i = 0; i < nd_region->ndr_mappings; i++) {
2417 struct list_head *l, *e;
2418 LIST_HEAD(list);
2419 int j;
2420
2421 nd_mapping = &nd_region->mapping[i];
2422 if (list_empty(&nd_mapping->labels)) {
2423 WARN_ON(1);
2424 continue;
2425 }
2426
2427 j = count;
2428 list_for_each_safe(l, e, &nd_mapping->labels) {
2429 if (!j--)
2430 break;
2431 list_move_tail(l, &list);
2432 }
2433 nd_mapping_free_labels(nd_mapping);
2434 list_splice_init(&list, &nd_mapping->labels);
2435 }
2436 }
2437
2438 if (count > 1)
2439 sort(devs, count, sizeof(struct device *), cmp_dpa, NULL);
2440
2441 return devs;
2442
2443 err:
2444 if (devs) {
2445 for (i = 0; devs[i]; i++)
2446 if (is_nd_blk(&nd_region->dev))
2447 namespace_blk_release(devs[i]);
2448 else
2449 namespace_pmem_release(devs[i]);
2450 kfree(devs);
2451 }
2452 return NULL;
2453}
2454
2455static struct device **create_namespaces(struct nd_region *nd_region)
2456{
2457 struct nd_mapping *nd_mapping;
2458 struct device **devs;
2459 int i;
2460
2461 if (nd_region->ndr_mappings == 0)
2462 return NULL;
2463
2464
2465 for (i = 0; i < nd_region->ndr_mappings; i++) {
2466 nd_mapping = &nd_region->mapping[i];
2467 mutex_lock_nested(&nd_mapping->lock, i);
2468 }
2469
2470 devs = scan_labels(nd_region);
2471
2472 for (i = 0; i < nd_region->ndr_mappings; i++) {
2473 int reverse = nd_region->ndr_mappings - 1 - i;
2474
2475 nd_mapping = &nd_region->mapping[reverse];
2476 mutex_unlock(&nd_mapping->lock);
2477 }
2478
2479 return devs;
2480}
2481
2482static void deactivate_labels(void *region)
2483{
2484 struct nd_region *nd_region = region;
2485 int i;
2486
2487 for (i = 0; i < nd_region->ndr_mappings; i++) {
2488 struct nd_mapping *nd_mapping = &nd_region->mapping[i];
2489 struct nvdimm_drvdata *ndd = nd_mapping->ndd;
2490 struct nvdimm *nvdimm = nd_mapping->nvdimm;
2491
2492 mutex_lock(&nd_mapping->lock);
2493 nd_mapping_free_labels(nd_mapping);
2494 mutex_unlock(&nd_mapping->lock);
2495
2496 put_ndd(ndd);
2497 nd_mapping->ndd = NULL;
2498 if (ndd)
2499 atomic_dec(&nvdimm->busy);
2500 }
2501}
2502
2503static int init_active_labels(struct nd_region *nd_region)
2504{
2505 int i, rc = 0;
2506
2507 for (i = 0; i < nd_region->ndr_mappings; i++) {
2508 struct nd_mapping *nd_mapping = &nd_region->mapping[i];
2509 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
2510 struct nvdimm *nvdimm = nd_mapping->nvdimm;
2511 struct nd_label_ent *label_ent;
2512 int count, j;
2513
2514
2515
2516
2517
2518 if (!ndd) {
2519 if (test_bit(NDD_LOCKED, &nvdimm->flags))
2520 ;
2521 else if (test_bit(NDD_LABELING, &nvdimm->flags))
2522 ;
2523 else
2524 continue;
2525
2526 dev_err(&nd_region->dev, "%s: is %s, failing probe\n",
2527 dev_name(&nd_mapping->nvdimm->dev),
2528 test_bit(NDD_LOCKED, &nvdimm->flags)
2529 ? "locked" : "disabled");
2530 rc = -ENXIO;
2531 goto out;
2532 }
2533 nd_mapping->ndd = ndd;
2534 atomic_inc(&nvdimm->busy);
2535 get_ndd(ndd);
2536
2537 count = nd_label_active_count(ndd);
2538 dev_dbg(ndd->dev, "count: %d\n", count);
2539 if (!count)
2540 continue;
2541 for (j = 0; j < count; j++) {
2542 struct nd_namespace_label *label;
2543
2544 label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL);
2545 if (!label_ent)
2546 break;
2547 label = nd_label_active(ndd, j);
2548 if (test_bit(NDD_NOBLK, &nvdimm->flags)) {
2549 u32 flags = nsl_get_flags(ndd, label);
2550
2551 flags &= ~NSLABEL_FLAG_LOCAL;
2552 nsl_set_flags(ndd, label, flags);
2553 }
2554 label_ent->label = label;
2555
2556 mutex_lock(&nd_mapping->lock);
2557 list_add_tail(&label_ent->list, &nd_mapping->labels);
2558 mutex_unlock(&nd_mapping->lock);
2559 }
2560
2561 if (j < count)
2562 break;
2563 }
2564
2565 if (i < nd_region->ndr_mappings)
2566 rc = -ENOMEM;
2567
2568out:
2569 if (rc) {
2570 deactivate_labels(nd_region);
2571 return rc;
2572 }
2573
2574 return devm_add_action_or_reset(&nd_region->dev, deactivate_labels,
2575 nd_region);
2576}
2577
2578int nd_region_register_namespaces(struct nd_region *nd_region, int *err)
2579{
2580 struct device **devs = NULL;
2581 int i, rc = 0, type;
2582
2583 *err = 0;
2584 nvdimm_bus_lock(&nd_region->dev);
2585 rc = init_active_labels(nd_region);
2586 if (rc) {
2587 nvdimm_bus_unlock(&nd_region->dev);
2588 return rc;
2589 }
2590
2591 type = nd_region_to_nstype(nd_region);
2592 switch (type) {
2593 case ND_DEVICE_NAMESPACE_IO:
2594 devs = create_namespace_io(nd_region);
2595 break;
2596 case ND_DEVICE_NAMESPACE_PMEM:
2597 case ND_DEVICE_NAMESPACE_BLK:
2598 devs = create_namespaces(nd_region);
2599 break;
2600 default:
2601 break;
2602 }
2603 nvdimm_bus_unlock(&nd_region->dev);
2604
2605 if (!devs)
2606 return -ENODEV;
2607
2608 for (i = 0; devs[i]; i++) {
2609 struct device *dev = devs[i];
2610 int id;
2611
2612 if (type == ND_DEVICE_NAMESPACE_BLK) {
2613 struct nd_namespace_blk *nsblk;
2614
2615 nsblk = to_nd_namespace_blk(dev);
2616 id = ida_simple_get(&nd_region->ns_ida, 0, 0,
2617 GFP_KERNEL);
2618 nsblk->id = id;
2619 } else if (type == ND_DEVICE_NAMESPACE_PMEM) {
2620 struct nd_namespace_pmem *nspm;
2621
2622 nspm = to_nd_namespace_pmem(dev);
2623 id = ida_simple_get(&nd_region->ns_ida, 0, 0,
2624 GFP_KERNEL);
2625 nspm->id = id;
2626 } else
2627 id = i;
2628
2629 if (id < 0)
2630 break;
2631 dev_set_name(dev, "namespace%d.%d", nd_region->id, id);
2632 nd_device_register(dev);
2633 }
2634 if (i)
2635 nd_region->ns_seed = devs[0];
2636
2637 if (devs[i]) {
2638 int j;
2639
2640 for (j = i; devs[j]; j++) {
2641 struct device *dev = devs[j];
2642
2643 device_initialize(dev);
2644 put_device(dev);
2645 }
2646 *err = j - i;
2647
2648
2649
2650
2651 if (*err == 0)
2652 rc = -ENODEV;
2653 }
2654 kfree(devs);
2655
2656 if (rc == -ENODEV)
2657 return rc;
2658
2659 return i;
2660}
2661