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5b497af4 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
4a826c83 DW |
2 | /* |
3 | * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. | |
4a826c83 DW |
4 | */ |
5 | #include <linux/device.h> | |
6 | #include <linux/ndctl.h> | |
b3fde74e | 7 | #include <linux/uuid.h> |
f524bf27 | 8 | #include <linux/slab.h> |
4a826c83 DW |
9 | #include <linux/io.h> |
10 | #include <linux/nd.h> | |
11 | #include "nd-core.h" | |
12 | #include "label.h" | |
13 | #include "nd.h" | |
14 | ||
b3fde74e | 15 | static guid_t nvdimm_btt_guid; |
14e49454 | 16 | static guid_t nvdimm_btt2_guid; |
b3fde74e DW |
17 | static guid_t nvdimm_pfn_guid; |
18 | static guid_t nvdimm_dax_guid; | |
19 | ||
c01dafad QC |
20 | static const char NSINDEX_SIGNATURE[] = "NAMESPACE_INDEX\0"; |
21 | ||
4a826c83 DW |
22 | static u32 best_seq(u32 a, u32 b) |
23 | { | |
24 | a &= NSINDEX_SEQ_MASK; | |
25 | b &= NSINDEX_SEQ_MASK; | |
26 | ||
27 | if (a == 0 || a == b) | |
28 | return b; | |
29 | else if (b == 0) | |
30 | return a; | |
31 | else if (nd_inc_seq(a) == b) | |
32 | return b; | |
33 | else | |
34 | return a; | |
35 | } | |
36 | ||
564e871a DW |
37 | unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd) |
38 | { | |
39 | return ndd->nslabel_size; | |
40 | } | |
41 | ||
9e694d9c TK |
42 | static size_t __sizeof_namespace_index(u32 nslot) |
43 | { | |
44 | return ALIGN(sizeof(struct nd_namespace_index) + DIV_ROUND_UP(nslot, 8), | |
45 | NSINDEX_ALIGN); | |
46 | } | |
47 | ||
48 | static int __nvdimm_num_label_slots(struct nvdimm_drvdata *ndd, | |
49 | size_t index_size) | |
50 | { | |
51 | return (ndd->nsarea.config_size - index_size * 2) / | |
52 | sizeof_namespace_label(ndd); | |
53 | } | |
54 | ||
02881768 | 55 | int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd) |
4a826c83 | 56 | { |
9e694d9c TK |
57 | u32 tmp_nslot, n; |
58 | ||
59 | tmp_nslot = ndd->nsarea.config_size / sizeof_namespace_label(ndd); | |
60 | n = __sizeof_namespace_index(tmp_nslot) / NSINDEX_ALIGN; | |
61 | ||
62 | return __nvdimm_num_label_slots(ndd, NSINDEX_ALIGN * n); | |
02881768 | 63 | } |
4a826c83 | 64 | |
02881768 DW |
65 | size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd) |
66 | { | |
67 | u32 nslot, space, size; | |
4a826c83 DW |
68 | |
69 | /* | |
9e694d9c TK |
70 | * Per UEFI 2.7, the minimum size of the Label Storage Area is large |
71 | * enough to hold 2 index blocks and 2 labels. The minimum index | |
1cfeb66e AD |
72 | * block size is 256 bytes. The label size is 128 for namespaces |
73 | * prior to version 1.2 and at minimum 256 for version 1.2 and later. | |
4a826c83 | 74 | */ |
02881768 DW |
75 | nslot = nvdimm_num_label_slots(ndd); |
76 | space = ndd->nsarea.config_size - nslot * sizeof_namespace_label(ndd); | |
9e694d9c TK |
77 | size = __sizeof_namespace_index(nslot) * 2; |
78 | if (size <= space && nslot >= 2) | |
02881768 | 79 | return size / 2; |
4a826c83 | 80 | |
02881768 DW |
81 | dev_err(ndd->dev, "label area (%d) too small to host (%d byte) labels\n", |
82 | ndd->nsarea.config_size, sizeof_namespace_label(ndd)); | |
83 | return 0; | |
f524bf27 DW |
84 | } |
85 | ||
564e871a | 86 | static int __nd_label_validate(struct nvdimm_drvdata *ndd) |
4a826c83 DW |
87 | { |
88 | /* | |
89 | * On media label format consists of two index blocks followed | |
90 | * by an array of labels. None of these structures are ever | |
91 | * updated in place. A sequence number tracks the current | |
92 | * active index and the next one to write, while labels are | |
93 | * written to free slots. | |
94 | * | |
95 | * +------------+ | |
96 | * | | | |
97 | * | nsindex0 | | |
98 | * | | | |
99 | * +------------+ | |
100 | * | | | |
101 | * | nsindex1 | | |
102 | * | | | |
103 | * +------------+ | |
104 | * | label0 | | |
105 | * +------------+ | |
106 | * | label1 | | |
107 | * +------------+ | |
108 | * | | | |
109 | * ....nslot... | |
110 | * | | | |
111 | * +------------+ | |
112 | * | labelN | | |
113 | * +------------+ | |
114 | */ | |
115 | struct nd_namespace_index *nsindex[] = { | |
116 | to_namespace_index(ndd, 0), | |
117 | to_namespace_index(ndd, 1), | |
118 | }; | |
119 | const int num_index = ARRAY_SIZE(nsindex); | |
120 | struct device *dev = ndd->dev; | |
121 | bool valid[2] = { 0 }; | |
122 | int i, num_valid = 0; | |
123 | u32 seq; | |
124 | ||
125 | for (i = 0; i < num_index; i++) { | |
126 | u32 nslot; | |
127 | u8 sig[NSINDEX_SIG_LEN]; | |
128 | u64 sum_save, sum, size; | |
564e871a | 129 | unsigned int version, labelsize; |
4a826c83 DW |
130 | |
131 | memcpy(sig, nsindex[i]->sig, NSINDEX_SIG_LEN); | |
132 | if (memcmp(sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN) != 0) { | |
426824d6 | 133 | dev_dbg(dev, "nsindex%d signature invalid\n", i); |
4a826c83 DW |
134 | continue; |
135 | } | |
564e871a DW |
136 | |
137 | /* label sizes larger than 128 arrived with v1.2 */ | |
138 | version = __le16_to_cpu(nsindex[i]->major) * 100 | |
139 | + __le16_to_cpu(nsindex[i]->minor); | |
140 | if (version >= 102) | |
141 | labelsize = 1 << (7 + nsindex[i]->labelsize); | |
142 | else | |
143 | labelsize = 128; | |
144 | ||
145 | if (labelsize != sizeof_namespace_label(ndd)) { | |
426824d6 DW |
146 | dev_dbg(dev, "nsindex%d labelsize %d invalid\n", |
147 | i, nsindex[i]->labelsize); | |
564e871a DW |
148 | continue; |
149 | } | |
150 | ||
4a826c83 DW |
151 | sum_save = __le64_to_cpu(nsindex[i]->checksum); |
152 | nsindex[i]->checksum = __cpu_to_le64(0); | |
153 | sum = nd_fletcher64(nsindex[i], sizeof_namespace_index(ndd), 1); | |
154 | nsindex[i]->checksum = __cpu_to_le64(sum_save); | |
155 | if (sum != sum_save) { | |
426824d6 | 156 | dev_dbg(dev, "nsindex%d checksum invalid\n", i); |
4a826c83 DW |
157 | continue; |
158 | } | |
159 | ||
160 | seq = __le32_to_cpu(nsindex[i]->seq); | |
161 | if ((seq & NSINDEX_SEQ_MASK) == 0) { | |
426824d6 | 162 | dev_dbg(dev, "nsindex%d sequence: %#x invalid\n", i, seq); |
4a826c83 DW |
163 | continue; |
164 | } | |
165 | ||
166 | /* sanity check the index against expected values */ | |
167 | if (__le64_to_cpu(nsindex[i]->myoff) | |
168 | != i * sizeof_namespace_index(ndd)) { | |
426824d6 DW |
169 | dev_dbg(dev, "nsindex%d myoff: %#llx invalid\n", |
170 | i, (unsigned long long) | |
4a826c83 DW |
171 | __le64_to_cpu(nsindex[i]->myoff)); |
172 | continue; | |
173 | } | |
174 | if (__le64_to_cpu(nsindex[i]->otheroff) | |
175 | != (!i) * sizeof_namespace_index(ndd)) { | |
426824d6 DW |
176 | dev_dbg(dev, "nsindex%d otheroff: %#llx invalid\n", |
177 | i, (unsigned long long) | |
4a826c83 DW |
178 | __le64_to_cpu(nsindex[i]->otheroff)); |
179 | continue; | |
180 | } | |
d86d4d63 AD |
181 | if (__le64_to_cpu(nsindex[i]->labeloff) |
182 | != 2 * sizeof_namespace_index(ndd)) { | |
183 | dev_dbg(dev, "nsindex%d labeloff: %#llx invalid\n", | |
184 | i, (unsigned long long) | |
185 | __le64_to_cpu(nsindex[i]->labeloff)); | |
186 | continue; | |
187 | } | |
4a826c83 DW |
188 | |
189 | size = __le64_to_cpu(nsindex[i]->mysize); | |
190 | if (size > sizeof_namespace_index(ndd) | |
191 | || size < sizeof(struct nd_namespace_index)) { | |
426824d6 | 192 | dev_dbg(dev, "nsindex%d mysize: %#llx invalid\n", i, size); |
4a826c83 DW |
193 | continue; |
194 | } | |
195 | ||
196 | nslot = __le32_to_cpu(nsindex[i]->nslot); | |
564e871a | 197 | if (nslot * sizeof_namespace_label(ndd) |
4a826c83 DW |
198 | + 2 * sizeof_namespace_index(ndd) |
199 | > ndd->nsarea.config_size) { | |
426824d6 DW |
200 | dev_dbg(dev, "nsindex%d nslot: %u invalid, config_size: %#x\n", |
201 | i, nslot, ndd->nsarea.config_size); | |
4a826c83 DW |
202 | continue; |
203 | } | |
204 | valid[i] = true; | |
205 | num_valid++; | |
206 | } | |
207 | ||
208 | switch (num_valid) { | |
209 | case 0: | |
210 | break; | |
211 | case 1: | |
212 | for (i = 0; i < num_index; i++) | |
213 | if (valid[i]) | |
214 | return i; | |
215 | /* can't have num_valid > 0 but valid[] = { false, false } */ | |
216 | WARN_ON(1); | |
217 | break; | |
218 | default: | |
219 | /* pick the best index... */ | |
220 | seq = best_seq(__le32_to_cpu(nsindex[0]->seq), | |
221 | __le32_to_cpu(nsindex[1]->seq)); | |
222 | if (seq == (__le32_to_cpu(nsindex[1]->seq) & NSINDEX_SEQ_MASK)) | |
223 | return 1; | |
224 | else | |
225 | return 0; | |
226 | break; | |
227 | } | |
228 | ||
229 | return -1; | |
230 | } | |
231 | ||
7d47aad4 | 232 | static int nd_label_validate(struct nvdimm_drvdata *ndd) |
564e871a DW |
233 | { |
234 | /* | |
235 | * In order to probe for and validate namespace index blocks we | |
236 | * need to know the size of the labels, and we can't trust the | |
237 | * size of the labels until we validate the index blocks. | |
238 | * Resolve this dependency loop by probing for known label | |
8990cdf1 DW |
239 | * sizes, but default to v1.2 256-byte namespace labels if |
240 | * discovery fails. | |
564e871a | 241 | */ |
8990cdf1 | 242 | int label_size[] = { 128, 256 }; |
564e871a DW |
243 | int i, rc; |
244 | ||
245 | for (i = 0; i < ARRAY_SIZE(label_size); i++) { | |
246 | ndd->nslabel_size = label_size[i]; | |
247 | rc = __nd_label_validate(ndd); | |
248 | if (rc >= 0) | |
249 | return rc; | |
250 | } | |
251 | ||
252 | return -1; | |
253 | } | |
254 | ||
7d47aad4 AD |
255 | static void nd_label_copy(struct nvdimm_drvdata *ndd, |
256 | struct nd_namespace_index *dst, | |
257 | struct nd_namespace_index *src) | |
4a826c83 | 258 | { |
19418b02 AD |
259 | /* just exit if either destination or source is NULL */ |
260 | if (!dst || !src) | |
4a826c83 DW |
261 | return; |
262 | ||
263 | memcpy(dst, src, sizeof_namespace_index(ndd)); | |
264 | } | |
265 | ||
266 | static struct nd_namespace_label *nd_label_base(struct nvdimm_drvdata *ndd) | |
267 | { | |
268 | void *base = to_namespace_index(ndd, 0); | |
269 | ||
270 | return base + 2 * sizeof_namespace_index(ndd); | |
271 | } | |
272 | ||
f524bf27 DW |
273 | static int to_slot(struct nvdimm_drvdata *ndd, |
274 | struct nd_namespace_label *nd_label) | |
275 | { | |
564e871a DW |
276 | unsigned long label, base; |
277 | ||
278 | label = (unsigned long) nd_label; | |
279 | base = (unsigned long) nd_label_base(ndd); | |
280 | ||
281 | return (label - base) / sizeof_namespace_label(ndd); | |
282 | } | |
283 | ||
284 | static struct nd_namespace_label *to_label(struct nvdimm_drvdata *ndd, int slot) | |
285 | { | |
286 | unsigned long label, base; | |
287 | ||
288 | base = (unsigned long) nd_label_base(ndd); | |
289 | label = base + sizeof_namespace_label(ndd) * slot; | |
290 | ||
291 | return (struct nd_namespace_label *) label; | |
f524bf27 DW |
292 | } |
293 | ||
4a826c83 DW |
294 | #define for_each_clear_bit_le(bit, addr, size) \ |
295 | for ((bit) = find_next_zero_bit_le((addr), (size), 0); \ | |
296 | (bit) < (size); \ | |
297 | (bit) = find_next_zero_bit_le((addr), (size), (bit) + 1)) | |
298 | ||
299 | /** | |
f524bf27 | 300 | * preamble_index - common variable initialization for nd_label_* routines |
4a826c83 | 301 | * @ndd: dimm container for the relevant label set |
f524bf27 | 302 | * @idx: namespace_index index |
4a826c83 DW |
303 | * @nsindex_out: on return set to the currently active namespace index |
304 | * @free: on return set to the free label bitmap in the index | |
305 | * @nslot: on return set to the number of slots in the label space | |
306 | */ | |
f524bf27 | 307 | static bool preamble_index(struct nvdimm_drvdata *ndd, int idx, |
4a826c83 DW |
308 | struct nd_namespace_index **nsindex_out, |
309 | unsigned long **free, u32 *nslot) | |
310 | { | |
311 | struct nd_namespace_index *nsindex; | |
312 | ||
f524bf27 | 313 | nsindex = to_namespace_index(ndd, idx); |
4a826c83 DW |
314 | if (nsindex == NULL) |
315 | return false; | |
316 | ||
317 | *free = (unsigned long *) nsindex->free; | |
318 | *nslot = __le32_to_cpu(nsindex->nslot); | |
319 | *nsindex_out = nsindex; | |
320 | ||
321 | return true; | |
322 | } | |
323 | ||
bf9bccc1 | 324 | char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags) |
4a826c83 DW |
325 | { |
326 | if (!label_id || !uuid) | |
327 | return NULL; | |
328 | snprintf(label_id->id, ND_LABEL_ID_SIZE, "%s-%pUb", | |
329 | flags & NSLABEL_FLAG_LOCAL ? "blk" : "pmem", uuid); | |
330 | return label_id->id; | |
331 | } | |
332 | ||
f524bf27 DW |
333 | static bool preamble_current(struct nvdimm_drvdata *ndd, |
334 | struct nd_namespace_index **nsindex, | |
335 | unsigned long **free, u32 *nslot) | |
336 | { | |
337 | return preamble_index(ndd, ndd->ns_current, nsindex, | |
338 | free, nslot); | |
339 | } | |
340 | ||
341 | static bool preamble_next(struct nvdimm_drvdata *ndd, | |
342 | struct nd_namespace_index **nsindex, | |
343 | unsigned long **free, u32 *nslot) | |
344 | { | |
345 | return preamble_index(ndd, ndd->ns_next, nsindex, | |
346 | free, nslot); | |
347 | } | |
348 | ||
355d8388 DW |
349 | static bool slot_valid(struct nvdimm_drvdata *ndd, |
350 | struct nd_namespace_label *nd_label, u32 slot) | |
4a826c83 DW |
351 | { |
352 | /* check that we are written where we expect to be written */ | |
353 | if (slot != __le32_to_cpu(nd_label->slot)) | |
354 | return false; | |
355 | ||
355d8388 DW |
356 | /* check checksum */ |
357 | if (namespace_label_has(ndd, checksum)) { | |
358 | u64 sum, sum_save; | |
359 | ||
360 | sum_save = __le64_to_cpu(nd_label->checksum); | |
361 | nd_label->checksum = __cpu_to_le64(0); | |
362 | sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); | |
363 | nd_label->checksum = __cpu_to_le64(sum_save); | |
364 | if (sum != sum_save) { | |
426824d6 DW |
365 | dev_dbg(ndd->dev, "fail checksum. slot: %d expect: %#llx\n", |
366 | slot, sum); | |
355d8388 DW |
367 | return false; |
368 | } | |
369 | } | |
370 | ||
4a826c83 DW |
371 | return true; |
372 | } | |
373 | ||
374 | int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd) | |
375 | { | |
376 | struct nd_namespace_index *nsindex; | |
377 | unsigned long *free; | |
378 | u32 nslot, slot; | |
379 | ||
380 | if (!preamble_current(ndd, &nsindex, &free, &nslot)) | |
381 | return 0; /* no label, nothing to reserve */ | |
382 | ||
383 | for_each_clear_bit_le(slot, free, nslot) { | |
d5d30d5a | 384 | struct nvdimm *nvdimm = to_nvdimm(ndd->dev); |
4a826c83 DW |
385 | struct nd_namespace_label *nd_label; |
386 | struct nd_region *nd_region = NULL; | |
387 | u8 label_uuid[NSLABEL_UUID_LEN]; | |
388 | struct nd_label_id label_id; | |
389 | struct resource *res; | |
390 | u32 flags; | |
391 | ||
564e871a | 392 | nd_label = to_label(ndd, slot); |
4a826c83 | 393 | |
355d8388 | 394 | if (!slot_valid(ndd, nd_label, slot)) |
4a826c83 DW |
395 | continue; |
396 | ||
397 | memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN); | |
398 | flags = __le32_to_cpu(nd_label->flags); | |
d5d30d5a DW |
399 | if (test_bit(NDD_NOBLK, &nvdimm->flags)) |
400 | flags &= ~NSLABEL_FLAG_LOCAL; | |
4a826c83 DW |
401 | nd_label_gen_id(&label_id, label_uuid, flags); |
402 | res = nvdimm_allocate_dpa(ndd, &label_id, | |
403 | __le64_to_cpu(nd_label->dpa), | |
404 | __le64_to_cpu(nd_label->rawsize)); | |
405 | nd_dbg_dpa(nd_region, ndd, res, "reserve\n"); | |
406 | if (!res) | |
407 | return -EBUSY; | |
408 | } | |
409 | ||
410 | return 0; | |
411 | } | |
bf9bccc1 | 412 | |
2d657d17 AD |
413 | int nd_label_data_init(struct nvdimm_drvdata *ndd) |
414 | { | |
7d47aad4 AD |
415 | size_t config_size, read_size, max_xfer, offset; |
416 | struct nd_namespace_index *nsindex; | |
417 | unsigned int i; | |
2d657d17 | 418 | int rc = 0; |
97052c1c | 419 | u32 nslot; |
2d657d17 AD |
420 | |
421 | if (ndd->data) | |
422 | return 0; | |
423 | ||
424 | if (ndd->nsarea.status || ndd->nsarea.max_xfer == 0) { | |
425 | dev_dbg(ndd->dev, "failed to init config data area: (%u:%u)\n", | |
426 | ndd->nsarea.max_xfer, ndd->nsarea.config_size); | |
427 | return -ENXIO; | |
428 | } | |
429 | ||
430 | /* | |
431 | * We need to determine the maximum index area as this is the section | |
432 | * we must read and validate before we can start processing labels. | |
433 | * | |
434 | * If the area is too small to contain the two indexes and 2 labels | |
435 | * then we abort. | |
436 | * | |
437 | * Start at a label size of 128 as this should result in the largest | |
438 | * possible namespace index size. | |
439 | */ | |
440 | ndd->nslabel_size = 128; | |
441 | read_size = sizeof_namespace_index(ndd) * 2; | |
442 | if (!read_size) | |
443 | return -ENXIO; | |
444 | ||
445 | /* Allocate config data */ | |
446 | config_size = ndd->nsarea.config_size; | |
447 | ndd->data = kvzalloc(config_size, GFP_KERNEL); | |
448 | if (!ndd->data) | |
449 | return -ENOMEM; | |
450 | ||
7d47aad4 AD |
451 | /* |
452 | * We want to guarantee as few reads as possible while conserving | |
453 | * memory. To do that we figure out how much unused space will be left | |
454 | * in the last read, divide that by the total number of reads it is | |
455 | * going to take given our maximum transfer size, and then reduce our | |
456 | * maximum transfer size based on that result. | |
457 | */ | |
458 | max_xfer = min_t(size_t, ndd->nsarea.max_xfer, config_size); | |
459 | if (read_size < max_xfer) { | |
460 | /* trim waste */ | |
461 | max_xfer -= ((max_xfer - 1) - (config_size - 1) % max_xfer) / | |
462 | DIV_ROUND_UP(config_size, max_xfer); | |
463 | /* make certain we read indexes in exactly 1 read */ | |
464 | if (max_xfer < read_size) | |
465 | max_xfer = read_size; | |
466 | } | |
467 | ||
468 | /* Make our initial read size a multiple of max_xfer size */ | |
469 | read_size = min(DIV_ROUND_UP(read_size, max_xfer) * max_xfer, | |
470 | config_size); | |
471 | ||
472 | /* Read the index data */ | |
473 | rc = nvdimm_get_config_data(ndd, ndd->data, 0, read_size); | |
474 | if (rc) | |
475 | goto out_err; | |
476 | ||
477 | /* Validate index data, if not valid assume all labels are invalid */ | |
478 | ndd->ns_current = nd_label_validate(ndd); | |
479 | if (ndd->ns_current < 0) | |
480 | return 0; | |
481 | ||
482 | /* Record our index values */ | |
483 | ndd->ns_next = nd_label_next_nsindex(ndd->ns_current); | |
484 | ||
485 | /* Copy "current" index on top of the "next" index */ | |
486 | nsindex = to_current_namespace_index(ndd); | |
487 | nd_label_copy(ndd, to_next_namespace_index(ndd), nsindex); | |
488 | ||
489 | /* Determine starting offset for label data */ | |
490 | offset = __le64_to_cpu(nsindex->labeloff); | |
97052c1c | 491 | nslot = __le32_to_cpu(nsindex->nslot); |
7d47aad4 AD |
492 | |
493 | /* Loop through the free list pulling in any active labels */ | |
97052c1c | 494 | for (i = 0; i < nslot; i++, offset += ndd->nslabel_size) { |
7d47aad4 AD |
495 | size_t label_read_size; |
496 | ||
497 | /* zero out the unused labels */ | |
498 | if (test_bit_le(i, nsindex->free)) { | |
499 | memset(ndd->data + offset, 0, ndd->nslabel_size); | |
500 | continue; | |
501 | } | |
502 | ||
503 | /* if we already read past here then just continue */ | |
504 | if (offset + ndd->nslabel_size <= read_size) | |
505 | continue; | |
506 | ||
507 | /* if we haven't read in a while reset our read_size offset */ | |
508 | if (read_size < offset) | |
509 | read_size = offset; | |
510 | ||
511 | /* determine how much more will be read after this next call. */ | |
512 | label_read_size = offset + ndd->nslabel_size - read_size; | |
513 | label_read_size = DIV_ROUND_UP(label_read_size, max_xfer) * | |
514 | max_xfer; | |
515 | ||
516 | /* truncate last read if needed */ | |
517 | if (read_size + label_read_size > config_size) | |
518 | label_read_size = config_size - read_size; | |
519 | ||
520 | /* Read the label data */ | |
521 | rc = nvdimm_get_config_data(ndd, ndd->data + read_size, | |
522 | read_size, label_read_size); | |
523 | if (rc) | |
524 | goto out_err; | |
525 | ||
526 | /* push read_size to next read offset */ | |
527 | read_size += label_read_size; | |
528 | } | |
529 | ||
530 | dev_dbg(ndd->dev, "len: %zu rc: %d\n", offset, rc); | |
531 | out_err: | |
532 | return rc; | |
2d657d17 AD |
533 | } |
534 | ||
bf9bccc1 DW |
535 | int nd_label_active_count(struct nvdimm_drvdata *ndd) |
536 | { | |
537 | struct nd_namespace_index *nsindex; | |
538 | unsigned long *free; | |
539 | u32 nslot, slot; | |
540 | int count = 0; | |
541 | ||
542 | if (!preamble_current(ndd, &nsindex, &free, &nslot)) | |
543 | return 0; | |
544 | ||
545 | for_each_clear_bit_le(slot, free, nslot) { | |
546 | struct nd_namespace_label *nd_label; | |
547 | ||
564e871a | 548 | nd_label = to_label(ndd, slot); |
bf9bccc1 | 549 | |
355d8388 | 550 | if (!slot_valid(ndd, nd_label, slot)) { |
bf9bccc1 DW |
551 | u32 label_slot = __le32_to_cpu(nd_label->slot); |
552 | u64 size = __le64_to_cpu(nd_label->rawsize); | |
553 | u64 dpa = __le64_to_cpu(nd_label->dpa); | |
554 | ||
555 | dev_dbg(ndd->dev, | |
426824d6 DW |
556 | "slot%d invalid slot: %d dpa: %llx size: %llx\n", |
557 | slot, label_slot, dpa, size); | |
bf9bccc1 DW |
558 | continue; |
559 | } | |
560 | count++; | |
561 | } | |
562 | return count; | |
563 | } | |
564 | ||
565 | struct nd_namespace_label *nd_label_active(struct nvdimm_drvdata *ndd, int n) | |
566 | { | |
567 | struct nd_namespace_index *nsindex; | |
568 | unsigned long *free; | |
569 | u32 nslot, slot; | |
570 | ||
571 | if (!preamble_current(ndd, &nsindex, &free, &nslot)) | |
572 | return NULL; | |
573 | ||
574 | for_each_clear_bit_le(slot, free, nslot) { | |
575 | struct nd_namespace_label *nd_label; | |
576 | ||
564e871a | 577 | nd_label = to_label(ndd, slot); |
355d8388 | 578 | if (!slot_valid(ndd, nd_label, slot)) |
bf9bccc1 DW |
579 | continue; |
580 | ||
581 | if (n-- == 0) | |
564e871a | 582 | return to_label(ndd, slot); |
bf9bccc1 DW |
583 | } |
584 | ||
585 | return NULL; | |
586 | } | |
f524bf27 | 587 | |
0ba1c634 | 588 | u32 nd_label_alloc_slot(struct nvdimm_drvdata *ndd) |
f524bf27 DW |
589 | { |
590 | struct nd_namespace_index *nsindex; | |
591 | unsigned long *free; | |
592 | u32 nslot, slot; | |
593 | ||
594 | if (!preamble_next(ndd, &nsindex, &free, &nslot)) | |
595 | return UINT_MAX; | |
596 | ||
597 | WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); | |
598 | ||
599 | slot = find_next_bit_le(free, nslot, 0); | |
600 | if (slot == nslot) | |
601 | return UINT_MAX; | |
602 | ||
603 | clear_bit_le(slot, free); | |
604 | ||
605 | return slot; | |
606 | } | |
607 | ||
0ba1c634 | 608 | bool nd_label_free_slot(struct nvdimm_drvdata *ndd, u32 slot) |
f524bf27 DW |
609 | { |
610 | struct nd_namespace_index *nsindex; | |
611 | unsigned long *free; | |
612 | u32 nslot; | |
613 | ||
614 | if (!preamble_next(ndd, &nsindex, &free, &nslot)) | |
615 | return false; | |
616 | ||
617 | WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); | |
618 | ||
619 | if (slot < nslot) | |
620 | return !test_and_set_bit_le(slot, free); | |
621 | return false; | |
622 | } | |
623 | ||
624 | u32 nd_label_nfree(struct nvdimm_drvdata *ndd) | |
625 | { | |
626 | struct nd_namespace_index *nsindex; | |
627 | unsigned long *free; | |
628 | u32 nslot; | |
629 | ||
630 | WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); | |
631 | ||
632 | if (!preamble_next(ndd, &nsindex, &free, &nslot)) | |
0ba1c634 | 633 | return nvdimm_num_label_slots(ndd); |
f524bf27 DW |
634 | |
635 | return bitmap_weight(free, nslot); | |
636 | } | |
637 | ||
638 | static int nd_label_write_index(struct nvdimm_drvdata *ndd, int index, u32 seq, | |
639 | unsigned long flags) | |
640 | { | |
641 | struct nd_namespace_index *nsindex; | |
642 | unsigned long offset; | |
643 | u64 checksum; | |
644 | u32 nslot; | |
645 | int rc; | |
646 | ||
647 | nsindex = to_namespace_index(ndd, index); | |
648 | if (flags & ND_NSINDEX_INIT) | |
649 | nslot = nvdimm_num_label_slots(ndd); | |
650 | else | |
651 | nslot = __le32_to_cpu(nsindex->nslot); | |
652 | ||
653 | memcpy(nsindex->sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN); | |
564e871a DW |
654 | memset(&nsindex->flags, 0, 3); |
655 | nsindex->labelsize = sizeof_namespace_label(ndd) >> 8; | |
f524bf27 DW |
656 | nsindex->seq = __cpu_to_le32(seq); |
657 | offset = (unsigned long) nsindex | |
658 | - (unsigned long) to_namespace_index(ndd, 0); | |
659 | nsindex->myoff = __cpu_to_le64(offset); | |
660 | nsindex->mysize = __cpu_to_le64(sizeof_namespace_index(ndd)); | |
661 | offset = (unsigned long) to_namespace_index(ndd, | |
662 | nd_label_next_nsindex(index)) | |
663 | - (unsigned long) to_namespace_index(ndd, 0); | |
664 | nsindex->otheroff = __cpu_to_le64(offset); | |
665 | offset = (unsigned long) nd_label_base(ndd) | |
666 | - (unsigned long) to_namespace_index(ndd, 0); | |
667 | nsindex->labeloff = __cpu_to_le64(offset); | |
668 | nsindex->nslot = __cpu_to_le32(nslot); | |
669 | nsindex->major = __cpu_to_le16(1); | |
8990cdf1 DW |
670 | if (sizeof_namespace_label(ndd) < 256) |
671 | nsindex->minor = __cpu_to_le16(1); | |
672 | else | |
673 | nsindex->minor = __cpu_to_le16(2); | |
f524bf27 DW |
674 | nsindex->checksum = __cpu_to_le64(0); |
675 | if (flags & ND_NSINDEX_INIT) { | |
676 | unsigned long *free = (unsigned long *) nsindex->free; | |
677 | u32 nfree = ALIGN(nslot, BITS_PER_LONG); | |
678 | int last_bits, i; | |
679 | ||
680 | memset(nsindex->free, 0xff, nfree / 8); | |
681 | for (i = 0, last_bits = nfree - nslot; i < last_bits; i++) | |
682 | clear_bit_le(nslot + i, free); | |
683 | } | |
684 | checksum = nd_fletcher64(nsindex, sizeof_namespace_index(ndd), 1); | |
685 | nsindex->checksum = __cpu_to_le64(checksum); | |
686 | rc = nvdimm_set_config_data(ndd, __le64_to_cpu(nsindex->myoff), | |
687 | nsindex, sizeof_namespace_index(ndd)); | |
688 | if (rc < 0) | |
689 | return rc; | |
690 | ||
691 | if (flags & ND_NSINDEX_INIT) | |
692 | return 0; | |
693 | ||
694 | /* copy the index we just wrote to the new 'next' */ | |
695 | WARN_ON(index != ndd->ns_next); | |
696 | nd_label_copy(ndd, to_current_namespace_index(ndd), nsindex); | |
697 | ndd->ns_current = nd_label_next_nsindex(ndd->ns_current); | |
698 | ndd->ns_next = nd_label_next_nsindex(ndd->ns_next); | |
699 | WARN_ON(ndd->ns_current == ndd->ns_next); | |
700 | ||
701 | return 0; | |
702 | } | |
703 | ||
704 | static unsigned long nd_label_offset(struct nvdimm_drvdata *ndd, | |
705 | struct nd_namespace_label *nd_label) | |
706 | { | |
707 | return (unsigned long) nd_label | |
708 | - (unsigned long) to_namespace_index(ndd, 0); | |
709 | } | |
710 | ||
b3fde74e DW |
711 | enum nvdimm_claim_class to_nvdimm_cclass(guid_t *guid) |
712 | { | |
713 | if (guid_equal(guid, &nvdimm_btt_guid)) | |
714 | return NVDIMM_CCLASS_BTT; | |
14e49454 VV |
715 | else if (guid_equal(guid, &nvdimm_btt2_guid)) |
716 | return NVDIMM_CCLASS_BTT2; | |
b3fde74e DW |
717 | else if (guid_equal(guid, &nvdimm_pfn_guid)) |
718 | return NVDIMM_CCLASS_PFN; | |
719 | else if (guid_equal(guid, &nvdimm_dax_guid)) | |
720 | return NVDIMM_CCLASS_DAX; | |
721 | else if (guid_equal(guid, &guid_null)) | |
722 | return NVDIMM_CCLASS_NONE; | |
723 | ||
724 | return NVDIMM_CCLASS_UNKNOWN; | |
725 | } | |
726 | ||
727 | static const guid_t *to_abstraction_guid(enum nvdimm_claim_class claim_class, | |
728 | guid_t *target) | |
729 | { | |
730 | if (claim_class == NVDIMM_CCLASS_BTT) | |
731 | return &nvdimm_btt_guid; | |
14e49454 VV |
732 | else if (claim_class == NVDIMM_CCLASS_BTT2) |
733 | return &nvdimm_btt2_guid; | |
b3fde74e DW |
734 | else if (claim_class == NVDIMM_CCLASS_PFN) |
735 | return &nvdimm_pfn_guid; | |
736 | else if (claim_class == NVDIMM_CCLASS_DAX) | |
737 | return &nvdimm_dax_guid; | |
738 | else if (claim_class == NVDIMM_CCLASS_UNKNOWN) { | |
739 | /* | |
740 | * If we're modifying a namespace for which we don't | |
741 | * know the claim_class, don't touch the existing guid. | |
742 | */ | |
743 | return target; | |
744 | } else | |
745 | return &guid_null; | |
746 | } | |
747 | ||
c4703ce1 DW |
748 | static void reap_victim(struct nd_mapping *nd_mapping, |
749 | struct nd_label_ent *victim) | |
750 | { | |
751 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
752 | u32 slot = to_slot(ndd, victim->label); | |
753 | ||
754 | dev_dbg(ndd->dev, "free: %d\n", slot); | |
755 | nd_label_free_slot(ndd, slot); | |
756 | victim->label = NULL; | |
757 | } | |
758 | ||
f524bf27 DW |
759 | static int __pmem_label_update(struct nd_region *nd_region, |
760 | struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm, | |
966d23a0 | 761 | int pos, unsigned long flags) |
f524bf27 | 762 | { |
b3fde74e | 763 | struct nd_namespace_common *ndns = &nspm->nsio.common; |
faec6f8a | 764 | struct nd_interleave_set *nd_set = nd_region->nd_set; |
f524bf27 | 765 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
f524bf27 DW |
766 | struct nd_namespace_label *nd_label; |
767 | struct nd_namespace_index *nsindex; | |
c4703ce1 | 768 | struct nd_label_ent *label_ent; |
16660eae DW |
769 | struct nd_label_id label_id; |
770 | struct resource *res; | |
f524bf27 DW |
771 | unsigned long *free; |
772 | u32 nslot, slot; | |
773 | size_t offset; | |
c12c48ce | 774 | u64 cookie; |
f524bf27 DW |
775 | int rc; |
776 | ||
777 | if (!preamble_next(ndd, &nsindex, &free, &nslot)) | |
778 | return -ENXIO; | |
779 | ||
c12c48ce | 780 | cookie = nd_region_interleave_set_cookie(nd_region, nsindex); |
16660eae DW |
781 | nd_label_gen_id(&label_id, nspm->uuid, 0); |
782 | for_each_dpa_resource(ndd, res) | |
783 | if (strcmp(res->name, label_id.id) == 0) | |
784 | break; | |
785 | ||
786 | if (!res) { | |
787 | WARN_ON_ONCE(1); | |
788 | return -ENXIO; | |
789 | } | |
790 | ||
f524bf27 DW |
791 | /* allocate and write the label to the staging (next) index */ |
792 | slot = nd_label_alloc_slot(ndd); | |
793 | if (slot == UINT_MAX) | |
794 | return -ENXIO; | |
426824d6 | 795 | dev_dbg(ndd->dev, "allocated: %d\n", slot); |
f524bf27 | 796 | |
564e871a DW |
797 | nd_label = to_label(ndd, slot); |
798 | memset(nd_label, 0, sizeof_namespace_label(ndd)); | |
f524bf27 DW |
799 | memcpy(nd_label->uuid, nspm->uuid, NSLABEL_UUID_LEN); |
800 | if (nspm->alt_name) | |
801 | memcpy(nd_label->name, nspm->alt_name, NSLABEL_NAME_LEN); | |
966d23a0 | 802 | nd_label->flags = __cpu_to_le32(flags); |
f524bf27 DW |
803 | nd_label->nlabel = __cpu_to_le16(nd_region->ndr_mappings); |
804 | nd_label->position = __cpu_to_le16(pos); | |
805 | nd_label->isetcookie = __cpu_to_le64(cookie); | |
16660eae | 806 | nd_label->rawsize = __cpu_to_le64(resource_size(res)); |
2de5148f | 807 | nd_label->lbasize = __cpu_to_le64(nspm->lbasize); |
16660eae | 808 | nd_label->dpa = __cpu_to_le64(res->start); |
f524bf27 | 809 | nd_label->slot = __cpu_to_le32(slot); |
faec6f8a DW |
810 | if (namespace_label_has(ndd, type_guid)) |
811 | guid_copy(&nd_label->type_guid, &nd_set->type_guid); | |
b3fde74e DW |
812 | if (namespace_label_has(ndd, abstraction_guid)) |
813 | guid_copy(&nd_label->abstraction_guid, | |
814 | to_abstraction_guid(ndns->claim_class, | |
815 | &nd_label->abstraction_guid)); | |
355d8388 DW |
816 | if (namespace_label_has(ndd, checksum)) { |
817 | u64 sum; | |
818 | ||
819 | nd_label->checksum = __cpu_to_le64(0); | |
820 | sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); | |
821 | nd_label->checksum = __cpu_to_le64(sum); | |
822 | } | |
426824d6 | 823 | nd_dbg_dpa(nd_region, ndd, res, "\n"); |
f524bf27 DW |
824 | |
825 | /* update label */ | |
826 | offset = nd_label_offset(ndd, nd_label); | |
827 | rc = nvdimm_set_config_data(ndd, offset, nd_label, | |
564e871a | 828 | sizeof_namespace_label(ndd)); |
f524bf27 DW |
829 | if (rc < 0) |
830 | return rc; | |
831 | ||
832 | /* Garbage collect the previous label */ | |
ae8219f1 | 833 | mutex_lock(&nd_mapping->lock); |
16660eae DW |
834 | list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
835 | if (!label_ent->label) | |
836 | continue; | |
c4703ce1 DW |
837 | if (test_and_clear_bit(ND_LABEL_REAP, &label_ent->flags) |
838 | || memcmp(nspm->uuid, label_ent->label->uuid, | |
839 | NSLABEL_UUID_LEN) == 0) | |
840 | reap_victim(nd_mapping, label_ent); | |
f524bf27 DW |
841 | } |
842 | ||
843 | /* update index */ | |
844 | rc = nd_label_write_index(ndd, ndd->ns_next, | |
845 | nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); | |
16660eae DW |
846 | if (rc == 0) { |
847 | list_for_each_entry(label_ent, &nd_mapping->labels, list) | |
848 | if (!label_ent->label) { | |
849 | label_ent->label = nd_label; | |
850 | nd_label = NULL; | |
851 | break; | |
852 | } | |
853 | dev_WARN_ONCE(&nspm->nsio.common.dev, nd_label, | |
854 | "failed to track label: %d\n", | |
855 | to_slot(ndd, nd_label)); | |
856 | if (nd_label) | |
857 | rc = -ENXIO; | |
858 | } | |
ae8219f1 | 859 | mutex_unlock(&nd_mapping->lock); |
0ba1c634 | 860 | |
ae8219f1 | 861 | return rc; |
0ba1c634 DW |
862 | } |
863 | ||
864 | static bool is_old_resource(struct resource *res, struct resource **list, int n) | |
f524bf27 DW |
865 | { |
866 | int i; | |
0ba1c634 DW |
867 | |
868 | if (res->flags & DPA_RESOURCE_ADJUSTED) | |
869 | return false; | |
870 | for (i = 0; i < n; i++) | |
871 | if (res == list[i]) | |
872 | return true; | |
873 | return false; | |
874 | } | |
875 | ||
876 | static struct resource *to_resource(struct nvdimm_drvdata *ndd, | |
877 | struct nd_namespace_label *nd_label) | |
878 | { | |
879 | struct resource *res; | |
880 | ||
881 | for_each_dpa_resource(ndd, res) { | |
882 | if (res->start != __le64_to_cpu(nd_label->dpa)) | |
883 | continue; | |
884 | if (resource_size(res) != __le64_to_cpu(nd_label->rawsize)) | |
885 | continue; | |
886 | return res; | |
887 | } | |
888 | ||
889 | return NULL; | |
890 | } | |
891 | ||
892 | /* | |
893 | * 1/ Account all the labels that can be freed after this update | |
894 | * 2/ Allocate and write the label to the staging (next) index | |
895 | * 3/ Record the resources in the namespace device | |
896 | */ | |
897 | static int __blk_label_update(struct nd_region *nd_region, | |
898 | struct nd_mapping *nd_mapping, struct nd_namespace_blk *nsblk, | |
899 | int num_labels) | |
900 | { | |
ae8219f1 | 901 | int i, alloc, victims, nfree, old_num_resources, nlabel, rc = -ENXIO; |
faec6f8a | 902 | struct nd_interleave_set *nd_set = nd_region->nd_set; |
b3fde74e | 903 | struct nd_namespace_common *ndns = &nsblk->common; |
0ba1c634 DW |
904 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
905 | struct nd_namespace_label *nd_label; | |
ae8219f1 | 906 | struct nd_label_ent *label_ent, *e; |
0ba1c634 DW |
907 | struct nd_namespace_index *nsindex; |
908 | unsigned long *free, *victim_map = NULL; | |
909 | struct resource *res, **old_res_list; | |
910 | struct nd_label_id label_id; | |
911 | u8 uuid[NSLABEL_UUID_LEN]; | |
3934d841 | 912 | int min_dpa_idx = 0; |
ae8219f1 | 913 | LIST_HEAD(list); |
0ba1c634 DW |
914 | u32 nslot, slot; |
915 | ||
916 | if (!preamble_next(ndd, &nsindex, &free, &nslot)) | |
917 | return -ENXIO; | |
918 | ||
919 | old_res_list = nsblk->res; | |
920 | nfree = nd_label_nfree(ndd); | |
921 | old_num_resources = nsblk->num_resources; | |
922 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
923 | ||
924 | /* | |
925 | * We need to loop over the old resources a few times, which seems a | |
926 | * bit inefficient, but we need to know that we have the label | |
927 | * space before we start mutating the tracking structures. | |
928 | * Otherwise the recovery method of last resort for userspace is | |
929 | * disable and re-enable the parent region. | |
930 | */ | |
931 | alloc = 0; | |
932 | for_each_dpa_resource(ndd, res) { | |
933 | if (strcmp(res->name, label_id.id) != 0) | |
934 | continue; | |
935 | if (!is_old_resource(res, old_res_list, old_num_resources)) | |
936 | alloc++; | |
937 | } | |
938 | ||
939 | victims = 0; | |
940 | if (old_num_resources) { | |
941 | /* convert old local-label-map to dimm-slot victim-map */ | |
9065ed12 | 942 | victim_map = bitmap_zalloc(nslot, GFP_KERNEL); |
0ba1c634 DW |
943 | if (!victim_map) |
944 | return -ENOMEM; | |
945 | ||
946 | /* mark unused labels for garbage collection */ | |
947 | for_each_clear_bit_le(slot, free, nslot) { | |
564e871a | 948 | nd_label = to_label(ndd, slot); |
0ba1c634 DW |
949 | memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); |
950 | if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) | |
951 | continue; | |
952 | res = to_resource(ndd, nd_label); | |
953 | if (res && is_old_resource(res, old_res_list, | |
954 | old_num_resources)) | |
955 | continue; | |
956 | slot = to_slot(ndd, nd_label); | |
957 | set_bit(slot, victim_map); | |
958 | victims++; | |
959 | } | |
960 | } | |
961 | ||
962 | /* don't allow updates that consume the last label */ | |
963 | if (nfree - alloc < 0 || nfree - alloc + victims < 1) { | |
8c2f7e86 | 964 | dev_info(&nsblk->common.dev, "insufficient label space\n"); |
9065ed12 | 965 | bitmap_free(victim_map); |
0ba1c634 DW |
966 | return -ENOSPC; |
967 | } | |
968 | /* from here on we need to abort on error */ | |
969 | ||
970 | ||
971 | /* assign all resources to the namespace before writing the labels */ | |
972 | nsblk->res = NULL; | |
973 | nsblk->num_resources = 0; | |
974 | for_each_dpa_resource(ndd, res) { | |
975 | if (strcmp(res->name, label_id.id) != 0) | |
976 | continue; | |
977 | if (!nsblk_add_resource(nd_region, ndd, nsblk, res->start)) { | |
978 | rc = -ENOMEM; | |
979 | goto abort; | |
980 | } | |
981 | } | |
982 | ||
3934d841 DW |
983 | /* |
984 | * Find the resource associated with the first label in the set | |
985 | * per the v1.2 namespace specification. | |
986 | */ | |
987 | for (i = 0; i < nsblk->num_resources; i++) { | |
988 | struct resource *min = nsblk->res[min_dpa_idx]; | |
989 | ||
990 | res = nsblk->res[i]; | |
991 | if (res->start < min->start) | |
992 | min_dpa_idx = i; | |
993 | } | |
994 | ||
0ba1c634 DW |
995 | for (i = 0; i < nsblk->num_resources; i++) { |
996 | size_t offset; | |
997 | ||
998 | res = nsblk->res[i]; | |
999 | if (is_old_resource(res, old_res_list, old_num_resources)) | |
1000 | continue; /* carry-over */ | |
1001 | slot = nd_label_alloc_slot(ndd); | |
1002 | if (slot == UINT_MAX) | |
1003 | goto abort; | |
426824d6 | 1004 | dev_dbg(ndd->dev, "allocated: %d\n", slot); |
0ba1c634 | 1005 | |
564e871a DW |
1006 | nd_label = to_label(ndd, slot); |
1007 | memset(nd_label, 0, sizeof_namespace_label(ndd)); | |
0ba1c634 DW |
1008 | memcpy(nd_label->uuid, nsblk->uuid, NSLABEL_UUID_LEN); |
1009 | if (nsblk->alt_name) | |
1010 | memcpy(nd_label->name, nsblk->alt_name, | |
1011 | NSLABEL_NAME_LEN); | |
1012 | nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_LOCAL); | |
8f2bc243 DW |
1013 | |
1014 | /* | |
1015 | * Use the presence of the type_guid as a flag to | |
3934d841 DW |
1016 | * determine isetcookie usage and nlabel + position |
1017 | * policy for blk-aperture namespaces. | |
8f2bc243 | 1018 | */ |
3934d841 DW |
1019 | if (namespace_label_has(ndd, type_guid)) { |
1020 | if (i == min_dpa_idx) { | |
1021 | nd_label->nlabel = __cpu_to_le16(nsblk->num_resources); | |
1022 | nd_label->position = __cpu_to_le16(0); | |
1023 | } else { | |
1024 | nd_label->nlabel = __cpu_to_le16(0xffff); | |
1025 | nd_label->position = __cpu_to_le16(0xffff); | |
1026 | } | |
8f2bc243 | 1027 | nd_label->isetcookie = __cpu_to_le64(nd_set->cookie2); |
3934d841 DW |
1028 | } else { |
1029 | nd_label->nlabel = __cpu_to_le16(0); /* N/A */ | |
1030 | nd_label->position = __cpu_to_le16(0); /* N/A */ | |
8f2bc243 | 1031 | nd_label->isetcookie = __cpu_to_le64(0); /* N/A */ |
3934d841 | 1032 | } |
8f2bc243 | 1033 | |
0ba1c634 DW |
1034 | nd_label->dpa = __cpu_to_le64(res->start); |
1035 | nd_label->rawsize = __cpu_to_le64(resource_size(res)); | |
1036 | nd_label->lbasize = __cpu_to_le64(nsblk->lbasize); | |
1037 | nd_label->slot = __cpu_to_le32(slot); | |
faec6f8a DW |
1038 | if (namespace_label_has(ndd, type_guid)) |
1039 | guid_copy(&nd_label->type_guid, &nd_set->type_guid); | |
b3fde74e DW |
1040 | if (namespace_label_has(ndd, abstraction_guid)) |
1041 | guid_copy(&nd_label->abstraction_guid, | |
1042 | to_abstraction_guid(ndns->claim_class, | |
1043 | &nd_label->abstraction_guid)); | |
1044 | ||
355d8388 DW |
1045 | if (namespace_label_has(ndd, checksum)) { |
1046 | u64 sum; | |
1047 | ||
1048 | nd_label->checksum = __cpu_to_le64(0); | |
1049 | sum = nd_fletcher64(nd_label, | |
1050 | sizeof_namespace_label(ndd), 1); | |
1051 | nd_label->checksum = __cpu_to_le64(sum); | |
1052 | } | |
0ba1c634 DW |
1053 | |
1054 | /* update label */ | |
1055 | offset = nd_label_offset(ndd, nd_label); | |
1056 | rc = nvdimm_set_config_data(ndd, offset, nd_label, | |
564e871a | 1057 | sizeof_namespace_label(ndd)); |
0ba1c634 DW |
1058 | if (rc < 0) |
1059 | goto abort; | |
1060 | } | |
1061 | ||
1062 | /* free up now unused slots in the new index */ | |
1063 | for_each_set_bit(slot, victim_map, victim_map ? nslot : 0) { | |
426824d6 | 1064 | dev_dbg(ndd->dev, "free: %d\n", slot); |
0ba1c634 DW |
1065 | nd_label_free_slot(ndd, slot); |
1066 | } | |
1067 | ||
1068 | /* update index */ | |
1069 | rc = nd_label_write_index(ndd, ndd->ns_next, | |
1070 | nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); | |
1071 | if (rc) | |
1072 | goto abort; | |
1073 | ||
1074 | /* | |
1075 | * Now that the on-dimm labels are up to date, fix up the tracking | |
1076 | * entries in nd_mapping->labels | |
1077 | */ | |
1078 | nlabel = 0; | |
ae8219f1 DW |
1079 | mutex_lock(&nd_mapping->lock); |
1080 | list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { | |
1081 | nd_label = label_ent->label; | |
1082 | if (!nd_label) | |
1083 | continue; | |
0ba1c634 DW |
1084 | nlabel++; |
1085 | memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); | |
1086 | if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) | |
1087 | continue; | |
1088 | nlabel--; | |
ae8219f1 DW |
1089 | list_move(&label_ent->list, &list); |
1090 | label_ent->label = NULL; | |
0ba1c634 | 1091 | } |
ae8219f1 DW |
1092 | list_splice_tail_init(&list, &nd_mapping->labels); |
1093 | mutex_unlock(&nd_mapping->lock); | |
1094 | ||
0ba1c634 DW |
1095 | if (nlabel + nsblk->num_resources > num_labels) { |
1096 | /* | |
1097 | * Bug, we can't end up with more resources than | |
1098 | * available labels | |
1099 | */ | |
1100 | WARN_ON_ONCE(1); | |
1101 | rc = -ENXIO; | |
1102 | goto out; | |
1103 | } | |
1104 | ||
ae8219f1 DW |
1105 | mutex_lock(&nd_mapping->lock); |
1106 | label_ent = list_first_entry_or_null(&nd_mapping->labels, | |
1107 | typeof(*label_ent), list); | |
1108 | if (!label_ent) { | |
1109 | WARN_ON(1); | |
1110 | mutex_unlock(&nd_mapping->lock); | |
1111 | rc = -ENXIO; | |
1112 | goto out; | |
1113 | } | |
0ba1c634 | 1114 | for_each_clear_bit_le(slot, free, nslot) { |
564e871a | 1115 | nd_label = to_label(ndd, slot); |
0ba1c634 DW |
1116 | memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); |
1117 | if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) | |
1118 | continue; | |
1119 | res = to_resource(ndd, nd_label); | |
1120 | res->flags &= ~DPA_RESOURCE_ADJUSTED; | |
ae8219f1 DW |
1121 | dev_vdbg(&nsblk->common.dev, "assign label slot: %d\n", slot); |
1122 | list_for_each_entry_from(label_ent, &nd_mapping->labels, list) { | |
1123 | if (label_ent->label) | |
1124 | continue; | |
1125 | label_ent->label = nd_label; | |
1126 | nd_label = NULL; | |
1127 | break; | |
1128 | } | |
1129 | if (nd_label) | |
1130 | dev_WARN(&nsblk->common.dev, | |
1131 | "failed to track label slot%d\n", slot); | |
0ba1c634 | 1132 | } |
ae8219f1 | 1133 | mutex_unlock(&nd_mapping->lock); |
0ba1c634 DW |
1134 | |
1135 | out: | |
1136 | kfree(old_res_list); | |
9065ed12 | 1137 | bitmap_free(victim_map); |
0ba1c634 DW |
1138 | return rc; |
1139 | ||
1140 | abort: | |
1141 | /* | |
1142 | * 1/ repair the allocated label bitmap in the index | |
1143 | * 2/ restore the resource list | |
1144 | */ | |
1145 | nd_label_copy(ndd, nsindex, to_current_namespace_index(ndd)); | |
1146 | kfree(nsblk->res); | |
1147 | nsblk->res = old_res_list; | |
1148 | nsblk->num_resources = old_num_resources; | |
1149 | old_res_list = NULL; | |
1150 | goto out; | |
1151 | } | |
1152 | ||
1153 | static int init_labels(struct nd_mapping *nd_mapping, int num_labels) | |
1154 | { | |
ae8219f1 DW |
1155 | int i, old_num_labels = 0; |
1156 | struct nd_label_ent *label_ent; | |
f524bf27 DW |
1157 | struct nd_namespace_index *nsindex; |
1158 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1159 | ||
ae8219f1 DW |
1160 | mutex_lock(&nd_mapping->lock); |
1161 | list_for_each_entry(label_ent, &nd_mapping->labels, list) | |
0ba1c634 | 1162 | old_num_labels++; |
ae8219f1 | 1163 | mutex_unlock(&nd_mapping->lock); |
f524bf27 | 1164 | |
0ba1c634 DW |
1165 | /* |
1166 | * We need to preserve all the old labels for the mapping so | |
1167 | * they can be garbage collected after writing the new labels. | |
1168 | */ | |
ae8219f1 DW |
1169 | for (i = old_num_labels; i < num_labels; i++) { |
1170 | label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL); | |
1171 | if (!label_ent) | |
0ba1c634 | 1172 | return -ENOMEM; |
ae8219f1 DW |
1173 | mutex_lock(&nd_mapping->lock); |
1174 | list_add_tail(&label_ent->list, &nd_mapping->labels); | |
1175 | mutex_unlock(&nd_mapping->lock); | |
0ba1c634 | 1176 | } |
0ba1c634 | 1177 | |
f524bf27 DW |
1178 | if (ndd->ns_current == -1 || ndd->ns_next == -1) |
1179 | /* pass */; | |
1180 | else | |
0ba1c634 | 1181 | return max(num_labels, old_num_labels); |
f524bf27 DW |
1182 | |
1183 | nsindex = to_namespace_index(ndd, 0); | |
1184 | memset(nsindex, 0, ndd->nsarea.config_size); | |
1185 | for (i = 0; i < 2; i++) { | |
b18d4b8a | 1186 | int rc = nd_label_write_index(ndd, i, 3 - i, ND_NSINDEX_INIT); |
f524bf27 DW |
1187 | |
1188 | if (rc) | |
1189 | return rc; | |
1190 | } | |
1191 | ndd->ns_next = 1; | |
1192 | ndd->ns_current = 0; | |
1193 | ||
0ba1c634 | 1194 | return max(num_labels, old_num_labels); |
f524bf27 DW |
1195 | } |
1196 | ||
1197 | static int del_labels(struct nd_mapping *nd_mapping, u8 *uuid) | |
1198 | { | |
1199 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
ae8219f1 | 1200 | struct nd_label_ent *label_ent, *e; |
f524bf27 DW |
1201 | struct nd_namespace_index *nsindex; |
1202 | u8 label_uuid[NSLABEL_UUID_LEN]; | |
f524bf27 | 1203 | unsigned long *free; |
ae8219f1 | 1204 | LIST_HEAD(list); |
f524bf27 | 1205 | u32 nslot, slot; |
ae8219f1 | 1206 | int active = 0; |
f524bf27 DW |
1207 | |
1208 | if (!uuid) | |
1209 | return 0; | |
1210 | ||
1211 | /* no index || no labels == nothing to delete */ | |
ae8219f1 | 1212 | if (!preamble_next(ndd, &nsindex, &free, &nslot)) |
f524bf27 DW |
1213 | return 0; |
1214 | ||
ae8219f1 DW |
1215 | mutex_lock(&nd_mapping->lock); |
1216 | list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { | |
1217 | struct nd_namespace_label *nd_label = label_ent->label; | |
1218 | ||
1219 | if (!nd_label) | |
1220 | continue; | |
1221 | active++; | |
f524bf27 DW |
1222 | memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN); |
1223 | if (memcmp(label_uuid, uuid, NSLABEL_UUID_LEN) != 0) | |
1224 | continue; | |
ae8219f1 | 1225 | active--; |
f524bf27 DW |
1226 | slot = to_slot(ndd, nd_label); |
1227 | nd_label_free_slot(ndd, slot); | |
426824d6 | 1228 | dev_dbg(ndd->dev, "free: %d\n", slot); |
ae8219f1 DW |
1229 | list_move_tail(&label_ent->list, &list); |
1230 | label_ent->label = NULL; | |
f524bf27 | 1231 | } |
ae8219f1 | 1232 | list_splice_tail_init(&list, &nd_mapping->labels); |
f524bf27 | 1233 | |
ae8219f1 DW |
1234 | if (active == 0) { |
1235 | nd_mapping_free_labels(nd_mapping); | |
426824d6 | 1236 | dev_dbg(ndd->dev, "no more active labels\n"); |
f524bf27 | 1237 | } |
ae8219f1 | 1238 | mutex_unlock(&nd_mapping->lock); |
f524bf27 DW |
1239 | |
1240 | return nd_label_write_index(ndd, ndd->ns_next, | |
1241 | nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); | |
1242 | } | |
1243 | ||
1244 | int nd_pmem_namespace_label_update(struct nd_region *nd_region, | |
1245 | struct nd_namespace_pmem *nspm, resource_size_t size) | |
1246 | { | |
966d23a0 | 1247 | int i, rc; |
f524bf27 DW |
1248 | |
1249 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1250 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
16660eae DW |
1251 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
1252 | struct resource *res; | |
966d23a0 | 1253 | int count = 0; |
f524bf27 DW |
1254 | |
1255 | if (size == 0) { | |
1256 | rc = del_labels(nd_mapping, nspm->uuid); | |
1257 | if (rc) | |
1258 | return rc; | |
1259 | continue; | |
1260 | } | |
1261 | ||
16660eae | 1262 | for_each_dpa_resource(ndd, res) |
2d9a0274 | 1263 | if (strncmp(res->name, "pmem", 4) == 0) |
16660eae DW |
1264 | count++; |
1265 | WARN_ON_ONCE(!count); | |
1266 | ||
1267 | rc = init_labels(nd_mapping, count); | |
0ba1c634 | 1268 | if (rc < 0) |
f524bf27 DW |
1269 | return rc; |
1270 | ||
966d23a0 DW |
1271 | rc = __pmem_label_update(nd_region, nd_mapping, nspm, i, |
1272 | NSLABEL_FLAG_UPDATING); | |
1273 | if (rc) | |
1274 | return rc; | |
1275 | } | |
1276 | ||
1277 | if (size == 0) | |
1278 | return 0; | |
1279 | ||
1280 | /* Clear the UPDATING flag per UEFI 2.7 expectations */ | |
1281 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1282 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1283 | ||
1284 | rc = __pmem_label_update(nd_region, nd_mapping, nspm, i, 0); | |
f524bf27 DW |
1285 | if (rc) |
1286 | return rc; | |
1287 | } | |
1288 | ||
1289 | return 0; | |
1290 | } | |
0ba1c634 DW |
1291 | |
1292 | int nd_blk_namespace_label_update(struct nd_region *nd_region, | |
1293 | struct nd_namespace_blk *nsblk, resource_size_t size) | |
1294 | { | |
1295 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
1296 | struct resource *res; | |
1297 | int count = 0; | |
1298 | ||
1299 | if (size == 0) | |
1300 | return del_labels(nd_mapping, nsblk->uuid); | |
1301 | ||
1302 | for_each_dpa_resource(to_ndd(nd_mapping), res) | |
1303 | count++; | |
1304 | ||
1305 | count = init_labels(nd_mapping, count); | |
1306 | if (count < 0) | |
1307 | return count; | |
1308 | ||
1309 | return __blk_label_update(nd_region, nd_mapping, nsblk, count); | |
1310 | } | |
b3fde74e DW |
1311 | |
1312 | int __init nd_label_init(void) | |
1313 | { | |
1314 | WARN_ON(guid_parse(NVDIMM_BTT_GUID, &nvdimm_btt_guid)); | |
14e49454 | 1315 | WARN_ON(guid_parse(NVDIMM_BTT2_GUID, &nvdimm_btt2_guid)); |
b3fde74e DW |
1316 | WARN_ON(guid_parse(NVDIMM_PFN_GUID, &nvdimm_pfn_guid)); |
1317 | WARN_ON(guid_parse(NVDIMM_DAX_GUID, &nvdimm_dax_guid)); | |
1318 | ||
1319 | return 0; | |
1320 | } |