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4a826c83 DW |
1 | /* |
2 | * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | */ | |
13 | #include <linux/device.h> | |
14 | #include <linux/ndctl.h> | |
b3fde74e | 15 | #include <linux/uuid.h> |
f524bf27 | 16 | #include <linux/slab.h> |
4a826c83 DW |
17 | #include <linux/io.h> |
18 | #include <linux/nd.h> | |
19 | #include "nd-core.h" | |
20 | #include "label.h" | |
21 | #include "nd.h" | |
22 | ||
b3fde74e | 23 | static guid_t nvdimm_btt_guid; |
14e49454 | 24 | static guid_t nvdimm_btt2_guid; |
b3fde74e DW |
25 | static guid_t nvdimm_pfn_guid; |
26 | static guid_t nvdimm_dax_guid; | |
27 | ||
4a826c83 DW |
28 | static u32 best_seq(u32 a, u32 b) |
29 | { | |
30 | a &= NSINDEX_SEQ_MASK; | |
31 | b &= NSINDEX_SEQ_MASK; | |
32 | ||
33 | if (a == 0 || a == b) | |
34 | return b; | |
35 | else if (b == 0) | |
36 | return a; | |
37 | else if (nd_inc_seq(a) == b) | |
38 | return b; | |
39 | else | |
40 | return a; | |
41 | } | |
42 | ||
564e871a DW |
43 | unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd) |
44 | { | |
45 | return ndd->nslabel_size; | |
46 | } | |
47 | ||
9e694d9c TK |
48 | static size_t __sizeof_namespace_index(u32 nslot) |
49 | { | |
50 | return ALIGN(sizeof(struct nd_namespace_index) + DIV_ROUND_UP(nslot, 8), | |
51 | NSINDEX_ALIGN); | |
52 | } | |
53 | ||
54 | static int __nvdimm_num_label_slots(struct nvdimm_drvdata *ndd, | |
55 | size_t index_size) | |
56 | { | |
57 | return (ndd->nsarea.config_size - index_size * 2) / | |
58 | sizeof_namespace_label(ndd); | |
59 | } | |
60 | ||
02881768 | 61 | int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd) |
4a826c83 | 62 | { |
9e694d9c TK |
63 | u32 tmp_nslot, n; |
64 | ||
65 | tmp_nslot = ndd->nsarea.config_size / sizeof_namespace_label(ndd); | |
66 | n = __sizeof_namespace_index(tmp_nslot) / NSINDEX_ALIGN; | |
67 | ||
68 | return __nvdimm_num_label_slots(ndd, NSINDEX_ALIGN * n); | |
02881768 | 69 | } |
4a826c83 | 70 | |
02881768 DW |
71 | size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd) |
72 | { | |
73 | u32 nslot, space, size; | |
4a826c83 DW |
74 | |
75 | /* | |
9e694d9c TK |
76 | * Per UEFI 2.7, the minimum size of the Label Storage Area is large |
77 | * enough to hold 2 index blocks and 2 labels. The minimum index | |
1cfeb66e AD |
78 | * block size is 256 bytes. The label size is 128 for namespaces |
79 | * prior to version 1.2 and at minimum 256 for version 1.2 and later. | |
4a826c83 | 80 | */ |
02881768 DW |
81 | nslot = nvdimm_num_label_slots(ndd); |
82 | space = ndd->nsarea.config_size - nslot * sizeof_namespace_label(ndd); | |
9e694d9c TK |
83 | size = __sizeof_namespace_index(nslot) * 2; |
84 | if (size <= space && nslot >= 2) | |
02881768 | 85 | return size / 2; |
4a826c83 | 86 | |
02881768 DW |
87 | dev_err(ndd->dev, "label area (%d) too small to host (%d byte) labels\n", |
88 | ndd->nsarea.config_size, sizeof_namespace_label(ndd)); | |
89 | return 0; | |
f524bf27 DW |
90 | } |
91 | ||
564e871a | 92 | static int __nd_label_validate(struct nvdimm_drvdata *ndd) |
4a826c83 DW |
93 | { |
94 | /* | |
95 | * On media label format consists of two index blocks followed | |
96 | * by an array of labels. None of these structures are ever | |
97 | * updated in place. A sequence number tracks the current | |
98 | * active index and the next one to write, while labels are | |
99 | * written to free slots. | |
100 | * | |
101 | * +------------+ | |
102 | * | | | |
103 | * | nsindex0 | | |
104 | * | | | |
105 | * +------------+ | |
106 | * | | | |
107 | * | nsindex1 | | |
108 | * | | | |
109 | * +------------+ | |
110 | * | label0 | | |
111 | * +------------+ | |
112 | * | label1 | | |
113 | * +------------+ | |
114 | * | | | |
115 | * ....nslot... | |
116 | * | | | |
117 | * +------------+ | |
118 | * | labelN | | |
119 | * +------------+ | |
120 | */ | |
121 | struct nd_namespace_index *nsindex[] = { | |
122 | to_namespace_index(ndd, 0), | |
123 | to_namespace_index(ndd, 1), | |
124 | }; | |
125 | const int num_index = ARRAY_SIZE(nsindex); | |
126 | struct device *dev = ndd->dev; | |
127 | bool valid[2] = { 0 }; | |
128 | int i, num_valid = 0; | |
129 | u32 seq; | |
130 | ||
131 | for (i = 0; i < num_index; i++) { | |
132 | u32 nslot; | |
133 | u8 sig[NSINDEX_SIG_LEN]; | |
134 | u64 sum_save, sum, size; | |
564e871a | 135 | unsigned int version, labelsize; |
4a826c83 DW |
136 | |
137 | memcpy(sig, nsindex[i]->sig, NSINDEX_SIG_LEN); | |
138 | if (memcmp(sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN) != 0) { | |
426824d6 | 139 | dev_dbg(dev, "nsindex%d signature invalid\n", i); |
4a826c83 DW |
140 | continue; |
141 | } | |
564e871a DW |
142 | |
143 | /* label sizes larger than 128 arrived with v1.2 */ | |
144 | version = __le16_to_cpu(nsindex[i]->major) * 100 | |
145 | + __le16_to_cpu(nsindex[i]->minor); | |
146 | if (version >= 102) | |
147 | labelsize = 1 << (7 + nsindex[i]->labelsize); | |
148 | else | |
149 | labelsize = 128; | |
150 | ||
151 | if (labelsize != sizeof_namespace_label(ndd)) { | |
426824d6 DW |
152 | dev_dbg(dev, "nsindex%d labelsize %d invalid\n", |
153 | i, nsindex[i]->labelsize); | |
564e871a DW |
154 | continue; |
155 | } | |
156 | ||
4a826c83 DW |
157 | sum_save = __le64_to_cpu(nsindex[i]->checksum); |
158 | nsindex[i]->checksum = __cpu_to_le64(0); | |
159 | sum = nd_fletcher64(nsindex[i], sizeof_namespace_index(ndd), 1); | |
160 | nsindex[i]->checksum = __cpu_to_le64(sum_save); | |
161 | if (sum != sum_save) { | |
426824d6 | 162 | dev_dbg(dev, "nsindex%d checksum invalid\n", i); |
4a826c83 DW |
163 | continue; |
164 | } | |
165 | ||
166 | seq = __le32_to_cpu(nsindex[i]->seq); | |
167 | if ((seq & NSINDEX_SEQ_MASK) == 0) { | |
426824d6 | 168 | dev_dbg(dev, "nsindex%d sequence: %#x invalid\n", i, seq); |
4a826c83 DW |
169 | continue; |
170 | } | |
171 | ||
172 | /* sanity check the index against expected values */ | |
173 | if (__le64_to_cpu(nsindex[i]->myoff) | |
174 | != i * sizeof_namespace_index(ndd)) { | |
426824d6 DW |
175 | dev_dbg(dev, "nsindex%d myoff: %#llx invalid\n", |
176 | i, (unsigned long long) | |
4a826c83 DW |
177 | __le64_to_cpu(nsindex[i]->myoff)); |
178 | continue; | |
179 | } | |
180 | if (__le64_to_cpu(nsindex[i]->otheroff) | |
181 | != (!i) * sizeof_namespace_index(ndd)) { | |
426824d6 DW |
182 | dev_dbg(dev, "nsindex%d otheroff: %#llx invalid\n", |
183 | i, (unsigned long long) | |
4a826c83 DW |
184 | __le64_to_cpu(nsindex[i]->otheroff)); |
185 | continue; | |
186 | } | |
d86d4d63 AD |
187 | if (__le64_to_cpu(nsindex[i]->labeloff) |
188 | != 2 * sizeof_namespace_index(ndd)) { | |
189 | dev_dbg(dev, "nsindex%d labeloff: %#llx invalid\n", | |
190 | i, (unsigned long long) | |
191 | __le64_to_cpu(nsindex[i]->labeloff)); | |
192 | continue; | |
193 | } | |
4a826c83 DW |
194 | |
195 | size = __le64_to_cpu(nsindex[i]->mysize); | |
196 | if (size > sizeof_namespace_index(ndd) | |
197 | || size < sizeof(struct nd_namespace_index)) { | |
426824d6 | 198 | dev_dbg(dev, "nsindex%d mysize: %#llx invalid\n", i, size); |
4a826c83 DW |
199 | continue; |
200 | } | |
201 | ||
202 | nslot = __le32_to_cpu(nsindex[i]->nslot); | |
564e871a | 203 | if (nslot * sizeof_namespace_label(ndd) |
4a826c83 DW |
204 | + 2 * sizeof_namespace_index(ndd) |
205 | > ndd->nsarea.config_size) { | |
426824d6 DW |
206 | dev_dbg(dev, "nsindex%d nslot: %u invalid, config_size: %#x\n", |
207 | i, nslot, ndd->nsarea.config_size); | |
4a826c83 DW |
208 | continue; |
209 | } | |
210 | valid[i] = true; | |
211 | num_valid++; | |
212 | } | |
213 | ||
214 | switch (num_valid) { | |
215 | case 0: | |
216 | break; | |
217 | case 1: | |
218 | for (i = 0; i < num_index; i++) | |
219 | if (valid[i]) | |
220 | return i; | |
221 | /* can't have num_valid > 0 but valid[] = { false, false } */ | |
222 | WARN_ON(1); | |
223 | break; | |
224 | default: | |
225 | /* pick the best index... */ | |
226 | seq = best_seq(__le32_to_cpu(nsindex[0]->seq), | |
227 | __le32_to_cpu(nsindex[1]->seq)); | |
228 | if (seq == (__le32_to_cpu(nsindex[1]->seq) & NSINDEX_SEQ_MASK)) | |
229 | return 1; | |
230 | else | |
231 | return 0; | |
232 | break; | |
233 | } | |
234 | ||
235 | return -1; | |
236 | } | |
237 | ||
7d47aad4 | 238 | static int nd_label_validate(struct nvdimm_drvdata *ndd) |
564e871a DW |
239 | { |
240 | /* | |
241 | * In order to probe for and validate namespace index blocks we | |
242 | * need to know the size of the labels, and we can't trust the | |
243 | * size of the labels until we validate the index blocks. | |
244 | * Resolve this dependency loop by probing for known label | |
8990cdf1 DW |
245 | * sizes, but default to v1.2 256-byte namespace labels if |
246 | * discovery fails. | |
564e871a | 247 | */ |
8990cdf1 | 248 | int label_size[] = { 128, 256 }; |
564e871a DW |
249 | int i, rc; |
250 | ||
251 | for (i = 0; i < ARRAY_SIZE(label_size); i++) { | |
252 | ndd->nslabel_size = label_size[i]; | |
253 | rc = __nd_label_validate(ndd); | |
254 | if (rc >= 0) | |
255 | return rc; | |
256 | } | |
257 | ||
258 | return -1; | |
259 | } | |
260 | ||
7d47aad4 AD |
261 | static void nd_label_copy(struct nvdimm_drvdata *ndd, |
262 | struct nd_namespace_index *dst, | |
263 | struct nd_namespace_index *src) | |
4a826c83 | 264 | { |
19418b02 AD |
265 | /* just exit if either destination or source is NULL */ |
266 | if (!dst || !src) | |
4a826c83 DW |
267 | return; |
268 | ||
269 | memcpy(dst, src, sizeof_namespace_index(ndd)); | |
270 | } | |
271 | ||
272 | static struct nd_namespace_label *nd_label_base(struct nvdimm_drvdata *ndd) | |
273 | { | |
274 | void *base = to_namespace_index(ndd, 0); | |
275 | ||
276 | return base + 2 * sizeof_namespace_index(ndd); | |
277 | } | |
278 | ||
f524bf27 DW |
279 | static int to_slot(struct nvdimm_drvdata *ndd, |
280 | struct nd_namespace_label *nd_label) | |
281 | { | |
564e871a DW |
282 | unsigned long label, base; |
283 | ||
284 | label = (unsigned long) nd_label; | |
285 | base = (unsigned long) nd_label_base(ndd); | |
286 | ||
287 | return (label - base) / sizeof_namespace_label(ndd); | |
288 | } | |
289 | ||
290 | static struct nd_namespace_label *to_label(struct nvdimm_drvdata *ndd, int slot) | |
291 | { | |
292 | unsigned long label, base; | |
293 | ||
294 | base = (unsigned long) nd_label_base(ndd); | |
295 | label = base + sizeof_namespace_label(ndd) * slot; | |
296 | ||
297 | return (struct nd_namespace_label *) label; | |
f524bf27 DW |
298 | } |
299 | ||
4a826c83 DW |
300 | #define for_each_clear_bit_le(bit, addr, size) \ |
301 | for ((bit) = find_next_zero_bit_le((addr), (size), 0); \ | |
302 | (bit) < (size); \ | |
303 | (bit) = find_next_zero_bit_le((addr), (size), (bit) + 1)) | |
304 | ||
305 | /** | |
f524bf27 | 306 | * preamble_index - common variable initialization for nd_label_* routines |
4a826c83 | 307 | * @ndd: dimm container for the relevant label set |
f524bf27 | 308 | * @idx: namespace_index index |
4a826c83 DW |
309 | * @nsindex_out: on return set to the currently active namespace index |
310 | * @free: on return set to the free label bitmap in the index | |
311 | * @nslot: on return set to the number of slots in the label space | |
312 | */ | |
f524bf27 | 313 | static bool preamble_index(struct nvdimm_drvdata *ndd, int idx, |
4a826c83 DW |
314 | struct nd_namespace_index **nsindex_out, |
315 | unsigned long **free, u32 *nslot) | |
316 | { | |
317 | struct nd_namespace_index *nsindex; | |
318 | ||
f524bf27 | 319 | nsindex = to_namespace_index(ndd, idx); |
4a826c83 DW |
320 | if (nsindex == NULL) |
321 | return false; | |
322 | ||
323 | *free = (unsigned long *) nsindex->free; | |
324 | *nslot = __le32_to_cpu(nsindex->nslot); | |
325 | *nsindex_out = nsindex; | |
326 | ||
327 | return true; | |
328 | } | |
329 | ||
bf9bccc1 | 330 | char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags) |
4a826c83 DW |
331 | { |
332 | if (!label_id || !uuid) | |
333 | return NULL; | |
334 | snprintf(label_id->id, ND_LABEL_ID_SIZE, "%s-%pUb", | |
335 | flags & NSLABEL_FLAG_LOCAL ? "blk" : "pmem", uuid); | |
336 | return label_id->id; | |
337 | } | |
338 | ||
f524bf27 DW |
339 | static bool preamble_current(struct nvdimm_drvdata *ndd, |
340 | struct nd_namespace_index **nsindex, | |
341 | unsigned long **free, u32 *nslot) | |
342 | { | |
343 | return preamble_index(ndd, ndd->ns_current, nsindex, | |
344 | free, nslot); | |
345 | } | |
346 | ||
347 | static bool preamble_next(struct nvdimm_drvdata *ndd, | |
348 | struct nd_namespace_index **nsindex, | |
349 | unsigned long **free, u32 *nslot) | |
350 | { | |
351 | return preamble_index(ndd, ndd->ns_next, nsindex, | |
352 | free, nslot); | |
353 | } | |
354 | ||
355d8388 DW |
355 | static bool slot_valid(struct nvdimm_drvdata *ndd, |
356 | struct nd_namespace_label *nd_label, u32 slot) | |
4a826c83 DW |
357 | { |
358 | /* check that we are written where we expect to be written */ | |
359 | if (slot != __le32_to_cpu(nd_label->slot)) | |
360 | return false; | |
361 | ||
362 | /* check that DPA allocations are page aligned */ | |
363 | if ((__le64_to_cpu(nd_label->dpa) | |
364 | | __le64_to_cpu(nd_label->rawsize)) % SZ_4K) | |
365 | return false; | |
366 | ||
355d8388 DW |
367 | /* check checksum */ |
368 | if (namespace_label_has(ndd, checksum)) { | |
369 | u64 sum, sum_save; | |
370 | ||
371 | sum_save = __le64_to_cpu(nd_label->checksum); | |
372 | nd_label->checksum = __cpu_to_le64(0); | |
373 | sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); | |
374 | nd_label->checksum = __cpu_to_le64(sum_save); | |
375 | if (sum != sum_save) { | |
426824d6 DW |
376 | dev_dbg(ndd->dev, "fail checksum. slot: %d expect: %#llx\n", |
377 | slot, sum); | |
355d8388 DW |
378 | return false; |
379 | } | |
380 | } | |
381 | ||
4a826c83 DW |
382 | return true; |
383 | } | |
384 | ||
385 | int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd) | |
386 | { | |
387 | struct nd_namespace_index *nsindex; | |
388 | unsigned long *free; | |
389 | u32 nslot, slot; | |
390 | ||
391 | if (!preamble_current(ndd, &nsindex, &free, &nslot)) | |
392 | return 0; /* no label, nothing to reserve */ | |
393 | ||
394 | for_each_clear_bit_le(slot, free, nslot) { | |
395 | struct nd_namespace_label *nd_label; | |
396 | struct nd_region *nd_region = NULL; | |
397 | u8 label_uuid[NSLABEL_UUID_LEN]; | |
398 | struct nd_label_id label_id; | |
399 | struct resource *res; | |
400 | u32 flags; | |
401 | ||
564e871a | 402 | nd_label = to_label(ndd, slot); |
4a826c83 | 403 | |
355d8388 | 404 | if (!slot_valid(ndd, nd_label, slot)) |
4a826c83 DW |
405 | continue; |
406 | ||
407 | memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN); | |
408 | flags = __le32_to_cpu(nd_label->flags); | |
409 | nd_label_gen_id(&label_id, label_uuid, flags); | |
410 | res = nvdimm_allocate_dpa(ndd, &label_id, | |
411 | __le64_to_cpu(nd_label->dpa), | |
412 | __le64_to_cpu(nd_label->rawsize)); | |
413 | nd_dbg_dpa(nd_region, ndd, res, "reserve\n"); | |
414 | if (!res) | |
415 | return -EBUSY; | |
416 | } | |
417 | ||
418 | return 0; | |
419 | } | |
bf9bccc1 | 420 | |
2d657d17 AD |
421 | int nd_label_data_init(struct nvdimm_drvdata *ndd) |
422 | { | |
7d47aad4 AD |
423 | size_t config_size, read_size, max_xfer, offset; |
424 | struct nd_namespace_index *nsindex; | |
425 | unsigned int i; | |
2d657d17 | 426 | int rc = 0; |
97052c1c | 427 | u32 nslot; |
2d657d17 AD |
428 | |
429 | if (ndd->data) | |
430 | return 0; | |
431 | ||
432 | if (ndd->nsarea.status || ndd->nsarea.max_xfer == 0) { | |
433 | dev_dbg(ndd->dev, "failed to init config data area: (%u:%u)\n", | |
434 | ndd->nsarea.max_xfer, ndd->nsarea.config_size); | |
435 | return -ENXIO; | |
436 | } | |
437 | ||
438 | /* | |
439 | * We need to determine the maximum index area as this is the section | |
440 | * we must read and validate before we can start processing labels. | |
441 | * | |
442 | * If the area is too small to contain the two indexes and 2 labels | |
443 | * then we abort. | |
444 | * | |
445 | * Start at a label size of 128 as this should result in the largest | |
446 | * possible namespace index size. | |
447 | */ | |
448 | ndd->nslabel_size = 128; | |
449 | read_size = sizeof_namespace_index(ndd) * 2; | |
450 | if (!read_size) | |
451 | return -ENXIO; | |
452 | ||
453 | /* Allocate config data */ | |
454 | config_size = ndd->nsarea.config_size; | |
455 | ndd->data = kvzalloc(config_size, GFP_KERNEL); | |
456 | if (!ndd->data) | |
457 | return -ENOMEM; | |
458 | ||
7d47aad4 AD |
459 | /* |
460 | * We want to guarantee as few reads as possible while conserving | |
461 | * memory. To do that we figure out how much unused space will be left | |
462 | * in the last read, divide that by the total number of reads it is | |
463 | * going to take given our maximum transfer size, and then reduce our | |
464 | * maximum transfer size based on that result. | |
465 | */ | |
466 | max_xfer = min_t(size_t, ndd->nsarea.max_xfer, config_size); | |
467 | if (read_size < max_xfer) { | |
468 | /* trim waste */ | |
469 | max_xfer -= ((max_xfer - 1) - (config_size - 1) % max_xfer) / | |
470 | DIV_ROUND_UP(config_size, max_xfer); | |
471 | /* make certain we read indexes in exactly 1 read */ | |
472 | if (max_xfer < read_size) | |
473 | max_xfer = read_size; | |
474 | } | |
475 | ||
476 | /* Make our initial read size a multiple of max_xfer size */ | |
477 | read_size = min(DIV_ROUND_UP(read_size, max_xfer) * max_xfer, | |
478 | config_size); | |
479 | ||
480 | /* Read the index data */ | |
481 | rc = nvdimm_get_config_data(ndd, ndd->data, 0, read_size); | |
482 | if (rc) | |
483 | goto out_err; | |
484 | ||
485 | /* Validate index data, if not valid assume all labels are invalid */ | |
486 | ndd->ns_current = nd_label_validate(ndd); | |
487 | if (ndd->ns_current < 0) | |
488 | return 0; | |
489 | ||
490 | /* Record our index values */ | |
491 | ndd->ns_next = nd_label_next_nsindex(ndd->ns_current); | |
492 | ||
493 | /* Copy "current" index on top of the "next" index */ | |
494 | nsindex = to_current_namespace_index(ndd); | |
495 | nd_label_copy(ndd, to_next_namespace_index(ndd), nsindex); | |
496 | ||
497 | /* Determine starting offset for label data */ | |
498 | offset = __le64_to_cpu(nsindex->labeloff); | |
97052c1c | 499 | nslot = __le32_to_cpu(nsindex->nslot); |
7d47aad4 AD |
500 | |
501 | /* Loop through the free list pulling in any active labels */ | |
97052c1c | 502 | for (i = 0; i < nslot; i++, offset += ndd->nslabel_size) { |
7d47aad4 AD |
503 | size_t label_read_size; |
504 | ||
505 | /* zero out the unused labels */ | |
506 | if (test_bit_le(i, nsindex->free)) { | |
507 | memset(ndd->data + offset, 0, ndd->nslabel_size); | |
508 | continue; | |
509 | } | |
510 | ||
511 | /* if we already read past here then just continue */ | |
512 | if (offset + ndd->nslabel_size <= read_size) | |
513 | continue; | |
514 | ||
515 | /* if we haven't read in a while reset our read_size offset */ | |
516 | if (read_size < offset) | |
517 | read_size = offset; | |
518 | ||
519 | /* determine how much more will be read after this next call. */ | |
520 | label_read_size = offset + ndd->nslabel_size - read_size; | |
521 | label_read_size = DIV_ROUND_UP(label_read_size, max_xfer) * | |
522 | max_xfer; | |
523 | ||
524 | /* truncate last read if needed */ | |
525 | if (read_size + label_read_size > config_size) | |
526 | label_read_size = config_size - read_size; | |
527 | ||
528 | /* Read the label data */ | |
529 | rc = nvdimm_get_config_data(ndd, ndd->data + read_size, | |
530 | read_size, label_read_size); | |
531 | if (rc) | |
532 | goto out_err; | |
533 | ||
534 | /* push read_size to next read offset */ | |
535 | read_size += label_read_size; | |
536 | } | |
537 | ||
538 | dev_dbg(ndd->dev, "len: %zu rc: %d\n", offset, rc); | |
539 | out_err: | |
540 | return rc; | |
2d657d17 AD |
541 | } |
542 | ||
bf9bccc1 DW |
543 | int nd_label_active_count(struct nvdimm_drvdata *ndd) |
544 | { | |
545 | struct nd_namespace_index *nsindex; | |
546 | unsigned long *free; | |
547 | u32 nslot, slot; | |
548 | int count = 0; | |
549 | ||
550 | if (!preamble_current(ndd, &nsindex, &free, &nslot)) | |
551 | return 0; | |
552 | ||
553 | for_each_clear_bit_le(slot, free, nslot) { | |
554 | struct nd_namespace_label *nd_label; | |
555 | ||
564e871a | 556 | nd_label = to_label(ndd, slot); |
bf9bccc1 | 557 | |
355d8388 | 558 | if (!slot_valid(ndd, nd_label, slot)) { |
bf9bccc1 DW |
559 | u32 label_slot = __le32_to_cpu(nd_label->slot); |
560 | u64 size = __le64_to_cpu(nd_label->rawsize); | |
561 | u64 dpa = __le64_to_cpu(nd_label->dpa); | |
562 | ||
563 | dev_dbg(ndd->dev, | |
426824d6 DW |
564 | "slot%d invalid slot: %d dpa: %llx size: %llx\n", |
565 | slot, label_slot, dpa, size); | |
bf9bccc1 DW |
566 | continue; |
567 | } | |
568 | count++; | |
569 | } | |
570 | return count; | |
571 | } | |
572 | ||
573 | struct nd_namespace_label *nd_label_active(struct nvdimm_drvdata *ndd, int n) | |
574 | { | |
575 | struct nd_namespace_index *nsindex; | |
576 | unsigned long *free; | |
577 | u32 nslot, slot; | |
578 | ||
579 | if (!preamble_current(ndd, &nsindex, &free, &nslot)) | |
580 | return NULL; | |
581 | ||
582 | for_each_clear_bit_le(slot, free, nslot) { | |
583 | struct nd_namespace_label *nd_label; | |
584 | ||
564e871a | 585 | nd_label = to_label(ndd, slot); |
355d8388 | 586 | if (!slot_valid(ndd, nd_label, slot)) |
bf9bccc1 DW |
587 | continue; |
588 | ||
589 | if (n-- == 0) | |
564e871a | 590 | return to_label(ndd, slot); |
bf9bccc1 DW |
591 | } |
592 | ||
593 | return NULL; | |
594 | } | |
f524bf27 | 595 | |
0ba1c634 | 596 | u32 nd_label_alloc_slot(struct nvdimm_drvdata *ndd) |
f524bf27 DW |
597 | { |
598 | struct nd_namespace_index *nsindex; | |
599 | unsigned long *free; | |
600 | u32 nslot, slot; | |
601 | ||
602 | if (!preamble_next(ndd, &nsindex, &free, &nslot)) | |
603 | return UINT_MAX; | |
604 | ||
605 | WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); | |
606 | ||
607 | slot = find_next_bit_le(free, nslot, 0); | |
608 | if (slot == nslot) | |
609 | return UINT_MAX; | |
610 | ||
611 | clear_bit_le(slot, free); | |
612 | ||
613 | return slot; | |
614 | } | |
615 | ||
0ba1c634 | 616 | bool nd_label_free_slot(struct nvdimm_drvdata *ndd, u32 slot) |
f524bf27 DW |
617 | { |
618 | struct nd_namespace_index *nsindex; | |
619 | unsigned long *free; | |
620 | u32 nslot; | |
621 | ||
622 | if (!preamble_next(ndd, &nsindex, &free, &nslot)) | |
623 | return false; | |
624 | ||
625 | WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); | |
626 | ||
627 | if (slot < nslot) | |
628 | return !test_and_set_bit_le(slot, free); | |
629 | return false; | |
630 | } | |
631 | ||
632 | u32 nd_label_nfree(struct nvdimm_drvdata *ndd) | |
633 | { | |
634 | struct nd_namespace_index *nsindex; | |
635 | unsigned long *free; | |
636 | u32 nslot; | |
637 | ||
638 | WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); | |
639 | ||
640 | if (!preamble_next(ndd, &nsindex, &free, &nslot)) | |
0ba1c634 | 641 | return nvdimm_num_label_slots(ndd); |
f524bf27 DW |
642 | |
643 | return bitmap_weight(free, nslot); | |
644 | } | |
645 | ||
646 | static int nd_label_write_index(struct nvdimm_drvdata *ndd, int index, u32 seq, | |
647 | unsigned long flags) | |
648 | { | |
649 | struct nd_namespace_index *nsindex; | |
650 | unsigned long offset; | |
651 | u64 checksum; | |
652 | u32 nslot; | |
653 | int rc; | |
654 | ||
655 | nsindex = to_namespace_index(ndd, index); | |
656 | if (flags & ND_NSINDEX_INIT) | |
657 | nslot = nvdimm_num_label_slots(ndd); | |
658 | else | |
659 | nslot = __le32_to_cpu(nsindex->nslot); | |
660 | ||
661 | memcpy(nsindex->sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN); | |
564e871a DW |
662 | memset(&nsindex->flags, 0, 3); |
663 | nsindex->labelsize = sizeof_namespace_label(ndd) >> 8; | |
f524bf27 DW |
664 | nsindex->seq = __cpu_to_le32(seq); |
665 | offset = (unsigned long) nsindex | |
666 | - (unsigned long) to_namespace_index(ndd, 0); | |
667 | nsindex->myoff = __cpu_to_le64(offset); | |
668 | nsindex->mysize = __cpu_to_le64(sizeof_namespace_index(ndd)); | |
669 | offset = (unsigned long) to_namespace_index(ndd, | |
670 | nd_label_next_nsindex(index)) | |
671 | - (unsigned long) to_namespace_index(ndd, 0); | |
672 | nsindex->otheroff = __cpu_to_le64(offset); | |
673 | offset = (unsigned long) nd_label_base(ndd) | |
674 | - (unsigned long) to_namespace_index(ndd, 0); | |
675 | nsindex->labeloff = __cpu_to_le64(offset); | |
676 | nsindex->nslot = __cpu_to_le32(nslot); | |
677 | nsindex->major = __cpu_to_le16(1); | |
8990cdf1 DW |
678 | if (sizeof_namespace_label(ndd) < 256) |
679 | nsindex->minor = __cpu_to_le16(1); | |
680 | else | |
681 | nsindex->minor = __cpu_to_le16(2); | |
f524bf27 DW |
682 | nsindex->checksum = __cpu_to_le64(0); |
683 | if (flags & ND_NSINDEX_INIT) { | |
684 | unsigned long *free = (unsigned long *) nsindex->free; | |
685 | u32 nfree = ALIGN(nslot, BITS_PER_LONG); | |
686 | int last_bits, i; | |
687 | ||
688 | memset(nsindex->free, 0xff, nfree / 8); | |
689 | for (i = 0, last_bits = nfree - nslot; i < last_bits; i++) | |
690 | clear_bit_le(nslot + i, free); | |
691 | } | |
692 | checksum = nd_fletcher64(nsindex, sizeof_namespace_index(ndd), 1); | |
693 | nsindex->checksum = __cpu_to_le64(checksum); | |
694 | rc = nvdimm_set_config_data(ndd, __le64_to_cpu(nsindex->myoff), | |
695 | nsindex, sizeof_namespace_index(ndd)); | |
696 | if (rc < 0) | |
697 | return rc; | |
698 | ||
699 | if (flags & ND_NSINDEX_INIT) | |
700 | return 0; | |
701 | ||
702 | /* copy the index we just wrote to the new 'next' */ | |
703 | WARN_ON(index != ndd->ns_next); | |
704 | nd_label_copy(ndd, to_current_namespace_index(ndd), nsindex); | |
705 | ndd->ns_current = nd_label_next_nsindex(ndd->ns_current); | |
706 | ndd->ns_next = nd_label_next_nsindex(ndd->ns_next); | |
707 | WARN_ON(ndd->ns_current == ndd->ns_next); | |
708 | ||
709 | return 0; | |
710 | } | |
711 | ||
712 | static unsigned long nd_label_offset(struct nvdimm_drvdata *ndd, | |
713 | struct nd_namespace_label *nd_label) | |
714 | { | |
715 | return (unsigned long) nd_label | |
716 | - (unsigned long) to_namespace_index(ndd, 0); | |
717 | } | |
718 | ||
b3fde74e DW |
719 | enum nvdimm_claim_class to_nvdimm_cclass(guid_t *guid) |
720 | { | |
721 | if (guid_equal(guid, &nvdimm_btt_guid)) | |
722 | return NVDIMM_CCLASS_BTT; | |
14e49454 VV |
723 | else if (guid_equal(guid, &nvdimm_btt2_guid)) |
724 | return NVDIMM_CCLASS_BTT2; | |
b3fde74e DW |
725 | else if (guid_equal(guid, &nvdimm_pfn_guid)) |
726 | return NVDIMM_CCLASS_PFN; | |
727 | else if (guid_equal(guid, &nvdimm_dax_guid)) | |
728 | return NVDIMM_CCLASS_DAX; | |
729 | else if (guid_equal(guid, &guid_null)) | |
730 | return NVDIMM_CCLASS_NONE; | |
731 | ||
732 | return NVDIMM_CCLASS_UNKNOWN; | |
733 | } | |
734 | ||
735 | static const guid_t *to_abstraction_guid(enum nvdimm_claim_class claim_class, | |
736 | guid_t *target) | |
737 | { | |
738 | if (claim_class == NVDIMM_CCLASS_BTT) | |
739 | return &nvdimm_btt_guid; | |
14e49454 VV |
740 | else if (claim_class == NVDIMM_CCLASS_BTT2) |
741 | return &nvdimm_btt2_guid; | |
b3fde74e DW |
742 | else if (claim_class == NVDIMM_CCLASS_PFN) |
743 | return &nvdimm_pfn_guid; | |
744 | else if (claim_class == NVDIMM_CCLASS_DAX) | |
745 | return &nvdimm_dax_guid; | |
746 | else if (claim_class == NVDIMM_CCLASS_UNKNOWN) { | |
747 | /* | |
748 | * If we're modifying a namespace for which we don't | |
749 | * know the claim_class, don't touch the existing guid. | |
750 | */ | |
751 | return target; | |
752 | } else | |
753 | return &guid_null; | |
754 | } | |
755 | ||
f524bf27 DW |
756 | static int __pmem_label_update(struct nd_region *nd_region, |
757 | struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm, | |
758 | int pos) | |
759 | { | |
b3fde74e | 760 | struct nd_namespace_common *ndns = &nspm->nsio.common; |
faec6f8a | 761 | struct nd_interleave_set *nd_set = nd_region->nd_set; |
f524bf27 | 762 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
16660eae | 763 | struct nd_label_ent *label_ent, *victim = NULL; |
f524bf27 DW |
764 | struct nd_namespace_label *nd_label; |
765 | struct nd_namespace_index *nsindex; | |
16660eae DW |
766 | struct nd_label_id label_id; |
767 | struct resource *res; | |
f524bf27 DW |
768 | unsigned long *free; |
769 | u32 nslot, slot; | |
770 | size_t offset; | |
c12c48ce | 771 | u64 cookie; |
f524bf27 DW |
772 | int rc; |
773 | ||
774 | if (!preamble_next(ndd, &nsindex, &free, &nslot)) | |
775 | return -ENXIO; | |
776 | ||
c12c48ce | 777 | cookie = nd_region_interleave_set_cookie(nd_region, nsindex); |
16660eae DW |
778 | nd_label_gen_id(&label_id, nspm->uuid, 0); |
779 | for_each_dpa_resource(ndd, res) | |
780 | if (strcmp(res->name, label_id.id) == 0) | |
781 | break; | |
782 | ||
783 | if (!res) { | |
784 | WARN_ON_ONCE(1); | |
785 | return -ENXIO; | |
786 | } | |
787 | ||
f524bf27 DW |
788 | /* allocate and write the label to the staging (next) index */ |
789 | slot = nd_label_alloc_slot(ndd); | |
790 | if (slot == UINT_MAX) | |
791 | return -ENXIO; | |
426824d6 | 792 | dev_dbg(ndd->dev, "allocated: %d\n", slot); |
f524bf27 | 793 | |
564e871a DW |
794 | nd_label = to_label(ndd, slot); |
795 | memset(nd_label, 0, sizeof_namespace_label(ndd)); | |
f524bf27 DW |
796 | memcpy(nd_label->uuid, nspm->uuid, NSLABEL_UUID_LEN); |
797 | if (nspm->alt_name) | |
798 | memcpy(nd_label->name, nspm->alt_name, NSLABEL_NAME_LEN); | |
799 | nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_UPDATING); | |
800 | nd_label->nlabel = __cpu_to_le16(nd_region->ndr_mappings); | |
801 | nd_label->position = __cpu_to_le16(pos); | |
802 | nd_label->isetcookie = __cpu_to_le64(cookie); | |
16660eae | 803 | nd_label->rawsize = __cpu_to_le64(resource_size(res)); |
2de5148f | 804 | nd_label->lbasize = __cpu_to_le64(nspm->lbasize); |
16660eae | 805 | nd_label->dpa = __cpu_to_le64(res->start); |
f524bf27 | 806 | nd_label->slot = __cpu_to_le32(slot); |
faec6f8a DW |
807 | if (namespace_label_has(ndd, type_guid)) |
808 | guid_copy(&nd_label->type_guid, &nd_set->type_guid); | |
b3fde74e DW |
809 | if (namespace_label_has(ndd, abstraction_guid)) |
810 | guid_copy(&nd_label->abstraction_guid, | |
811 | to_abstraction_guid(ndns->claim_class, | |
812 | &nd_label->abstraction_guid)); | |
355d8388 DW |
813 | if (namespace_label_has(ndd, checksum)) { |
814 | u64 sum; | |
815 | ||
816 | nd_label->checksum = __cpu_to_le64(0); | |
817 | sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); | |
818 | nd_label->checksum = __cpu_to_le64(sum); | |
819 | } | |
426824d6 | 820 | nd_dbg_dpa(nd_region, ndd, res, "\n"); |
f524bf27 DW |
821 | |
822 | /* update label */ | |
823 | offset = nd_label_offset(ndd, nd_label); | |
824 | rc = nvdimm_set_config_data(ndd, offset, nd_label, | |
564e871a | 825 | sizeof_namespace_label(ndd)); |
f524bf27 DW |
826 | if (rc < 0) |
827 | return rc; | |
828 | ||
829 | /* Garbage collect the previous label */ | |
ae8219f1 | 830 | mutex_lock(&nd_mapping->lock); |
16660eae DW |
831 | list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
832 | if (!label_ent->label) | |
833 | continue; | |
834 | if (memcmp(nspm->uuid, label_ent->label->uuid, | |
835 | NSLABEL_UUID_LEN) != 0) | |
836 | continue; | |
837 | victim = label_ent; | |
838 | list_move_tail(&victim->list, &nd_mapping->labels); | |
839 | break; | |
840 | } | |
841 | if (victim) { | |
426824d6 | 842 | dev_dbg(ndd->dev, "free: %d\n", slot); |
16660eae DW |
843 | slot = to_slot(ndd, victim->label); |
844 | nd_label_free_slot(ndd, slot); | |
845 | victim->label = NULL; | |
f524bf27 DW |
846 | } |
847 | ||
848 | /* update index */ | |
849 | rc = nd_label_write_index(ndd, ndd->ns_next, | |
850 | nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); | |
16660eae DW |
851 | if (rc == 0) { |
852 | list_for_each_entry(label_ent, &nd_mapping->labels, list) | |
853 | if (!label_ent->label) { | |
854 | label_ent->label = nd_label; | |
855 | nd_label = NULL; | |
856 | break; | |
857 | } | |
858 | dev_WARN_ONCE(&nspm->nsio.common.dev, nd_label, | |
859 | "failed to track label: %d\n", | |
860 | to_slot(ndd, nd_label)); | |
861 | if (nd_label) | |
862 | rc = -ENXIO; | |
863 | } | |
ae8219f1 | 864 | mutex_unlock(&nd_mapping->lock); |
0ba1c634 | 865 | |
ae8219f1 | 866 | return rc; |
0ba1c634 DW |
867 | } |
868 | ||
869 | static bool is_old_resource(struct resource *res, struct resource **list, int n) | |
f524bf27 DW |
870 | { |
871 | int i; | |
0ba1c634 DW |
872 | |
873 | if (res->flags & DPA_RESOURCE_ADJUSTED) | |
874 | return false; | |
875 | for (i = 0; i < n; i++) | |
876 | if (res == list[i]) | |
877 | return true; | |
878 | return false; | |
879 | } | |
880 | ||
881 | static struct resource *to_resource(struct nvdimm_drvdata *ndd, | |
882 | struct nd_namespace_label *nd_label) | |
883 | { | |
884 | struct resource *res; | |
885 | ||
886 | for_each_dpa_resource(ndd, res) { | |
887 | if (res->start != __le64_to_cpu(nd_label->dpa)) | |
888 | continue; | |
889 | if (resource_size(res) != __le64_to_cpu(nd_label->rawsize)) | |
890 | continue; | |
891 | return res; | |
892 | } | |
893 | ||
894 | return NULL; | |
895 | } | |
896 | ||
897 | /* | |
898 | * 1/ Account all the labels that can be freed after this update | |
899 | * 2/ Allocate and write the label to the staging (next) index | |
900 | * 3/ Record the resources in the namespace device | |
901 | */ | |
902 | static int __blk_label_update(struct nd_region *nd_region, | |
903 | struct nd_mapping *nd_mapping, struct nd_namespace_blk *nsblk, | |
904 | int num_labels) | |
905 | { | |
ae8219f1 | 906 | int i, alloc, victims, nfree, old_num_resources, nlabel, rc = -ENXIO; |
faec6f8a | 907 | struct nd_interleave_set *nd_set = nd_region->nd_set; |
b3fde74e | 908 | struct nd_namespace_common *ndns = &nsblk->common; |
0ba1c634 DW |
909 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
910 | struct nd_namespace_label *nd_label; | |
ae8219f1 | 911 | struct nd_label_ent *label_ent, *e; |
0ba1c634 DW |
912 | struct nd_namespace_index *nsindex; |
913 | unsigned long *free, *victim_map = NULL; | |
914 | struct resource *res, **old_res_list; | |
915 | struct nd_label_id label_id; | |
916 | u8 uuid[NSLABEL_UUID_LEN]; | |
3934d841 | 917 | int min_dpa_idx = 0; |
ae8219f1 | 918 | LIST_HEAD(list); |
0ba1c634 DW |
919 | u32 nslot, slot; |
920 | ||
921 | if (!preamble_next(ndd, &nsindex, &free, &nslot)) | |
922 | return -ENXIO; | |
923 | ||
924 | old_res_list = nsblk->res; | |
925 | nfree = nd_label_nfree(ndd); | |
926 | old_num_resources = nsblk->num_resources; | |
927 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
928 | ||
929 | /* | |
930 | * We need to loop over the old resources a few times, which seems a | |
931 | * bit inefficient, but we need to know that we have the label | |
932 | * space before we start mutating the tracking structures. | |
933 | * Otherwise the recovery method of last resort for userspace is | |
934 | * disable and re-enable the parent region. | |
935 | */ | |
936 | alloc = 0; | |
937 | for_each_dpa_resource(ndd, res) { | |
938 | if (strcmp(res->name, label_id.id) != 0) | |
939 | continue; | |
940 | if (!is_old_resource(res, old_res_list, old_num_resources)) | |
941 | alloc++; | |
942 | } | |
943 | ||
944 | victims = 0; | |
945 | if (old_num_resources) { | |
946 | /* convert old local-label-map to dimm-slot victim-map */ | |
947 | victim_map = kcalloc(BITS_TO_LONGS(nslot), sizeof(long), | |
948 | GFP_KERNEL); | |
949 | if (!victim_map) | |
950 | return -ENOMEM; | |
951 | ||
952 | /* mark unused labels for garbage collection */ | |
953 | for_each_clear_bit_le(slot, free, nslot) { | |
564e871a | 954 | nd_label = to_label(ndd, slot); |
0ba1c634 DW |
955 | memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); |
956 | if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) | |
957 | continue; | |
958 | res = to_resource(ndd, nd_label); | |
959 | if (res && is_old_resource(res, old_res_list, | |
960 | old_num_resources)) | |
961 | continue; | |
962 | slot = to_slot(ndd, nd_label); | |
963 | set_bit(slot, victim_map); | |
964 | victims++; | |
965 | } | |
966 | } | |
967 | ||
968 | /* don't allow updates that consume the last label */ | |
969 | if (nfree - alloc < 0 || nfree - alloc + victims < 1) { | |
8c2f7e86 | 970 | dev_info(&nsblk->common.dev, "insufficient label space\n"); |
0ba1c634 DW |
971 | kfree(victim_map); |
972 | return -ENOSPC; | |
973 | } | |
974 | /* from here on we need to abort on error */ | |
975 | ||
976 | ||
977 | /* assign all resources to the namespace before writing the labels */ | |
978 | nsblk->res = NULL; | |
979 | nsblk->num_resources = 0; | |
980 | for_each_dpa_resource(ndd, res) { | |
981 | if (strcmp(res->name, label_id.id) != 0) | |
982 | continue; | |
983 | if (!nsblk_add_resource(nd_region, ndd, nsblk, res->start)) { | |
984 | rc = -ENOMEM; | |
985 | goto abort; | |
986 | } | |
987 | } | |
988 | ||
3934d841 DW |
989 | /* |
990 | * Find the resource associated with the first label in the set | |
991 | * per the v1.2 namespace specification. | |
992 | */ | |
993 | for (i = 0; i < nsblk->num_resources; i++) { | |
994 | struct resource *min = nsblk->res[min_dpa_idx]; | |
995 | ||
996 | res = nsblk->res[i]; | |
997 | if (res->start < min->start) | |
998 | min_dpa_idx = i; | |
999 | } | |
1000 | ||
0ba1c634 DW |
1001 | for (i = 0; i < nsblk->num_resources; i++) { |
1002 | size_t offset; | |
1003 | ||
1004 | res = nsblk->res[i]; | |
1005 | if (is_old_resource(res, old_res_list, old_num_resources)) | |
1006 | continue; /* carry-over */ | |
1007 | slot = nd_label_alloc_slot(ndd); | |
1008 | if (slot == UINT_MAX) | |
1009 | goto abort; | |
426824d6 | 1010 | dev_dbg(ndd->dev, "allocated: %d\n", slot); |
0ba1c634 | 1011 | |
564e871a DW |
1012 | nd_label = to_label(ndd, slot); |
1013 | memset(nd_label, 0, sizeof_namespace_label(ndd)); | |
0ba1c634 DW |
1014 | memcpy(nd_label->uuid, nsblk->uuid, NSLABEL_UUID_LEN); |
1015 | if (nsblk->alt_name) | |
1016 | memcpy(nd_label->name, nsblk->alt_name, | |
1017 | NSLABEL_NAME_LEN); | |
1018 | nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_LOCAL); | |
8f2bc243 DW |
1019 | |
1020 | /* | |
1021 | * Use the presence of the type_guid as a flag to | |
3934d841 DW |
1022 | * determine isetcookie usage and nlabel + position |
1023 | * policy for blk-aperture namespaces. | |
8f2bc243 | 1024 | */ |
3934d841 DW |
1025 | if (namespace_label_has(ndd, type_guid)) { |
1026 | if (i == min_dpa_idx) { | |
1027 | nd_label->nlabel = __cpu_to_le16(nsblk->num_resources); | |
1028 | nd_label->position = __cpu_to_le16(0); | |
1029 | } else { | |
1030 | nd_label->nlabel = __cpu_to_le16(0xffff); | |
1031 | nd_label->position = __cpu_to_le16(0xffff); | |
1032 | } | |
8f2bc243 | 1033 | nd_label->isetcookie = __cpu_to_le64(nd_set->cookie2); |
3934d841 DW |
1034 | } else { |
1035 | nd_label->nlabel = __cpu_to_le16(0); /* N/A */ | |
1036 | nd_label->position = __cpu_to_le16(0); /* N/A */ | |
8f2bc243 | 1037 | nd_label->isetcookie = __cpu_to_le64(0); /* N/A */ |
3934d841 | 1038 | } |
8f2bc243 | 1039 | |
0ba1c634 DW |
1040 | nd_label->dpa = __cpu_to_le64(res->start); |
1041 | nd_label->rawsize = __cpu_to_le64(resource_size(res)); | |
1042 | nd_label->lbasize = __cpu_to_le64(nsblk->lbasize); | |
1043 | nd_label->slot = __cpu_to_le32(slot); | |
faec6f8a DW |
1044 | if (namespace_label_has(ndd, type_guid)) |
1045 | guid_copy(&nd_label->type_guid, &nd_set->type_guid); | |
b3fde74e DW |
1046 | if (namespace_label_has(ndd, abstraction_guid)) |
1047 | guid_copy(&nd_label->abstraction_guid, | |
1048 | to_abstraction_guid(ndns->claim_class, | |
1049 | &nd_label->abstraction_guid)); | |
1050 | ||
355d8388 DW |
1051 | if (namespace_label_has(ndd, checksum)) { |
1052 | u64 sum; | |
1053 | ||
1054 | nd_label->checksum = __cpu_to_le64(0); | |
1055 | sum = nd_fletcher64(nd_label, | |
1056 | sizeof_namespace_label(ndd), 1); | |
1057 | nd_label->checksum = __cpu_to_le64(sum); | |
1058 | } | |
0ba1c634 DW |
1059 | |
1060 | /* update label */ | |
1061 | offset = nd_label_offset(ndd, nd_label); | |
1062 | rc = nvdimm_set_config_data(ndd, offset, nd_label, | |
564e871a | 1063 | sizeof_namespace_label(ndd)); |
0ba1c634 DW |
1064 | if (rc < 0) |
1065 | goto abort; | |
1066 | } | |
1067 | ||
1068 | /* free up now unused slots in the new index */ | |
1069 | for_each_set_bit(slot, victim_map, victim_map ? nslot : 0) { | |
426824d6 | 1070 | dev_dbg(ndd->dev, "free: %d\n", slot); |
0ba1c634 DW |
1071 | nd_label_free_slot(ndd, slot); |
1072 | } | |
1073 | ||
1074 | /* update index */ | |
1075 | rc = nd_label_write_index(ndd, ndd->ns_next, | |
1076 | nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); | |
1077 | if (rc) | |
1078 | goto abort; | |
1079 | ||
1080 | /* | |
1081 | * Now that the on-dimm labels are up to date, fix up the tracking | |
1082 | * entries in nd_mapping->labels | |
1083 | */ | |
1084 | nlabel = 0; | |
ae8219f1 DW |
1085 | mutex_lock(&nd_mapping->lock); |
1086 | list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { | |
1087 | nd_label = label_ent->label; | |
1088 | if (!nd_label) | |
1089 | continue; | |
0ba1c634 DW |
1090 | nlabel++; |
1091 | memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); | |
1092 | if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) | |
1093 | continue; | |
1094 | nlabel--; | |
ae8219f1 DW |
1095 | list_move(&label_ent->list, &list); |
1096 | label_ent->label = NULL; | |
0ba1c634 | 1097 | } |
ae8219f1 DW |
1098 | list_splice_tail_init(&list, &nd_mapping->labels); |
1099 | mutex_unlock(&nd_mapping->lock); | |
1100 | ||
0ba1c634 DW |
1101 | if (nlabel + nsblk->num_resources > num_labels) { |
1102 | /* | |
1103 | * Bug, we can't end up with more resources than | |
1104 | * available labels | |
1105 | */ | |
1106 | WARN_ON_ONCE(1); | |
1107 | rc = -ENXIO; | |
1108 | goto out; | |
1109 | } | |
1110 | ||
ae8219f1 DW |
1111 | mutex_lock(&nd_mapping->lock); |
1112 | label_ent = list_first_entry_or_null(&nd_mapping->labels, | |
1113 | typeof(*label_ent), list); | |
1114 | if (!label_ent) { | |
1115 | WARN_ON(1); | |
1116 | mutex_unlock(&nd_mapping->lock); | |
1117 | rc = -ENXIO; | |
1118 | goto out; | |
1119 | } | |
0ba1c634 | 1120 | for_each_clear_bit_le(slot, free, nslot) { |
564e871a | 1121 | nd_label = to_label(ndd, slot); |
0ba1c634 DW |
1122 | memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); |
1123 | if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) | |
1124 | continue; | |
1125 | res = to_resource(ndd, nd_label); | |
1126 | res->flags &= ~DPA_RESOURCE_ADJUSTED; | |
ae8219f1 DW |
1127 | dev_vdbg(&nsblk->common.dev, "assign label slot: %d\n", slot); |
1128 | list_for_each_entry_from(label_ent, &nd_mapping->labels, list) { | |
1129 | if (label_ent->label) | |
1130 | continue; | |
1131 | label_ent->label = nd_label; | |
1132 | nd_label = NULL; | |
1133 | break; | |
1134 | } | |
1135 | if (nd_label) | |
1136 | dev_WARN(&nsblk->common.dev, | |
1137 | "failed to track label slot%d\n", slot); | |
0ba1c634 | 1138 | } |
ae8219f1 | 1139 | mutex_unlock(&nd_mapping->lock); |
0ba1c634 DW |
1140 | |
1141 | out: | |
1142 | kfree(old_res_list); | |
1143 | kfree(victim_map); | |
1144 | return rc; | |
1145 | ||
1146 | abort: | |
1147 | /* | |
1148 | * 1/ repair the allocated label bitmap in the index | |
1149 | * 2/ restore the resource list | |
1150 | */ | |
1151 | nd_label_copy(ndd, nsindex, to_current_namespace_index(ndd)); | |
1152 | kfree(nsblk->res); | |
1153 | nsblk->res = old_res_list; | |
1154 | nsblk->num_resources = old_num_resources; | |
1155 | old_res_list = NULL; | |
1156 | goto out; | |
1157 | } | |
1158 | ||
1159 | static int init_labels(struct nd_mapping *nd_mapping, int num_labels) | |
1160 | { | |
ae8219f1 DW |
1161 | int i, old_num_labels = 0; |
1162 | struct nd_label_ent *label_ent; | |
f524bf27 DW |
1163 | struct nd_namespace_index *nsindex; |
1164 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1165 | ||
ae8219f1 DW |
1166 | mutex_lock(&nd_mapping->lock); |
1167 | list_for_each_entry(label_ent, &nd_mapping->labels, list) | |
0ba1c634 | 1168 | old_num_labels++; |
ae8219f1 | 1169 | mutex_unlock(&nd_mapping->lock); |
f524bf27 | 1170 | |
0ba1c634 DW |
1171 | /* |
1172 | * We need to preserve all the old labels for the mapping so | |
1173 | * they can be garbage collected after writing the new labels. | |
1174 | */ | |
ae8219f1 DW |
1175 | for (i = old_num_labels; i < num_labels; i++) { |
1176 | label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL); | |
1177 | if (!label_ent) | |
0ba1c634 | 1178 | return -ENOMEM; |
ae8219f1 DW |
1179 | mutex_lock(&nd_mapping->lock); |
1180 | list_add_tail(&label_ent->list, &nd_mapping->labels); | |
1181 | mutex_unlock(&nd_mapping->lock); | |
0ba1c634 | 1182 | } |
0ba1c634 | 1183 | |
f524bf27 DW |
1184 | if (ndd->ns_current == -1 || ndd->ns_next == -1) |
1185 | /* pass */; | |
1186 | else | |
0ba1c634 | 1187 | return max(num_labels, old_num_labels); |
f524bf27 DW |
1188 | |
1189 | nsindex = to_namespace_index(ndd, 0); | |
1190 | memset(nsindex, 0, ndd->nsarea.config_size); | |
1191 | for (i = 0; i < 2; i++) { | |
b18d4b8a | 1192 | int rc = nd_label_write_index(ndd, i, 3 - i, ND_NSINDEX_INIT); |
f524bf27 DW |
1193 | |
1194 | if (rc) | |
1195 | return rc; | |
1196 | } | |
1197 | ndd->ns_next = 1; | |
1198 | ndd->ns_current = 0; | |
1199 | ||
0ba1c634 | 1200 | return max(num_labels, old_num_labels); |
f524bf27 DW |
1201 | } |
1202 | ||
1203 | static int del_labels(struct nd_mapping *nd_mapping, u8 *uuid) | |
1204 | { | |
1205 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
ae8219f1 | 1206 | struct nd_label_ent *label_ent, *e; |
f524bf27 DW |
1207 | struct nd_namespace_index *nsindex; |
1208 | u8 label_uuid[NSLABEL_UUID_LEN]; | |
f524bf27 | 1209 | unsigned long *free; |
ae8219f1 | 1210 | LIST_HEAD(list); |
f524bf27 | 1211 | u32 nslot, slot; |
ae8219f1 | 1212 | int active = 0; |
f524bf27 DW |
1213 | |
1214 | if (!uuid) | |
1215 | return 0; | |
1216 | ||
1217 | /* no index || no labels == nothing to delete */ | |
ae8219f1 | 1218 | if (!preamble_next(ndd, &nsindex, &free, &nslot)) |
f524bf27 DW |
1219 | return 0; |
1220 | ||
ae8219f1 DW |
1221 | mutex_lock(&nd_mapping->lock); |
1222 | list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { | |
1223 | struct nd_namespace_label *nd_label = label_ent->label; | |
1224 | ||
1225 | if (!nd_label) | |
1226 | continue; | |
1227 | active++; | |
f524bf27 DW |
1228 | memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN); |
1229 | if (memcmp(label_uuid, uuid, NSLABEL_UUID_LEN) != 0) | |
1230 | continue; | |
ae8219f1 | 1231 | active--; |
f524bf27 DW |
1232 | slot = to_slot(ndd, nd_label); |
1233 | nd_label_free_slot(ndd, slot); | |
426824d6 | 1234 | dev_dbg(ndd->dev, "free: %d\n", slot); |
ae8219f1 DW |
1235 | list_move_tail(&label_ent->list, &list); |
1236 | label_ent->label = NULL; | |
f524bf27 | 1237 | } |
ae8219f1 | 1238 | list_splice_tail_init(&list, &nd_mapping->labels); |
f524bf27 | 1239 | |
ae8219f1 DW |
1240 | if (active == 0) { |
1241 | nd_mapping_free_labels(nd_mapping); | |
426824d6 | 1242 | dev_dbg(ndd->dev, "no more active labels\n"); |
f524bf27 | 1243 | } |
ae8219f1 | 1244 | mutex_unlock(&nd_mapping->lock); |
f524bf27 DW |
1245 | |
1246 | return nd_label_write_index(ndd, ndd->ns_next, | |
1247 | nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); | |
1248 | } | |
1249 | ||
1250 | int nd_pmem_namespace_label_update(struct nd_region *nd_region, | |
1251 | struct nd_namespace_pmem *nspm, resource_size_t size) | |
1252 | { | |
1253 | int i; | |
1254 | ||
1255 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1256 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
16660eae DW |
1257 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
1258 | struct resource *res; | |
1259 | int rc, count = 0; | |
f524bf27 DW |
1260 | |
1261 | if (size == 0) { | |
1262 | rc = del_labels(nd_mapping, nspm->uuid); | |
1263 | if (rc) | |
1264 | return rc; | |
1265 | continue; | |
1266 | } | |
1267 | ||
16660eae | 1268 | for_each_dpa_resource(ndd, res) |
2d9a0274 | 1269 | if (strncmp(res->name, "pmem", 4) == 0) |
16660eae DW |
1270 | count++; |
1271 | WARN_ON_ONCE(!count); | |
1272 | ||
1273 | rc = init_labels(nd_mapping, count); | |
0ba1c634 | 1274 | if (rc < 0) |
f524bf27 DW |
1275 | return rc; |
1276 | ||
1277 | rc = __pmem_label_update(nd_region, nd_mapping, nspm, i); | |
1278 | if (rc) | |
1279 | return rc; | |
1280 | } | |
1281 | ||
1282 | return 0; | |
1283 | } | |
0ba1c634 DW |
1284 | |
1285 | int nd_blk_namespace_label_update(struct nd_region *nd_region, | |
1286 | struct nd_namespace_blk *nsblk, resource_size_t size) | |
1287 | { | |
1288 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
1289 | struct resource *res; | |
1290 | int count = 0; | |
1291 | ||
1292 | if (size == 0) | |
1293 | return del_labels(nd_mapping, nsblk->uuid); | |
1294 | ||
1295 | for_each_dpa_resource(to_ndd(nd_mapping), res) | |
1296 | count++; | |
1297 | ||
1298 | count = init_labels(nd_mapping, count); | |
1299 | if (count < 0) | |
1300 | return count; | |
1301 | ||
1302 | return __blk_label_update(nd_region, nd_mapping, nsblk, count); | |
1303 | } | |
b3fde74e DW |
1304 | |
1305 | int __init nd_label_init(void) | |
1306 | { | |
1307 | WARN_ON(guid_parse(NVDIMM_BTT_GUID, &nvdimm_btt_guid)); | |
14e49454 | 1308 | WARN_ON(guid_parse(NVDIMM_BTT2_GUID, &nvdimm_btt2_guid)); |
b3fde74e DW |
1309 | WARN_ON(guid_parse(NVDIMM_PFN_GUID, &nvdimm_pfn_guid)); |
1310 | WARN_ON(guid_parse(NVDIMM_DAX_GUID, &nvdimm_dax_guid)); | |
1311 | ||
1312 | return 0; | |
1313 | } |