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a4bd217b JG |
1 | /* |
2 | * Copyright (C) 2016 CNEX Labs | |
3 | * Initial: Javier Gonzalez <javier@cnexlabs.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License version | |
7 | * 2 as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * pblk-recovery.c - pblk's recovery path | |
15 | */ | |
16 | ||
17 | #include "pblk.h" | |
18 | ||
19 | void pblk_submit_rec(struct work_struct *work) | |
20 | { | |
21 | struct pblk_rec_ctx *recovery = | |
22 | container_of(work, struct pblk_rec_ctx, ws_rec); | |
23 | struct pblk *pblk = recovery->pblk; | |
24 | struct nvm_tgt_dev *dev = pblk->dev; | |
25 | struct nvm_rq *rqd = recovery->rqd; | |
26 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); | |
27 | int max_secs = nvm_max_phys_sects(dev); | |
28 | struct bio *bio; | |
29 | unsigned int nr_rec_secs; | |
30 | unsigned int pgs_read; | |
31 | int ret; | |
32 | ||
33 | nr_rec_secs = bitmap_weight((unsigned long int *)&rqd->ppa_status, | |
34 | max_secs); | |
35 | ||
36 | bio = bio_alloc(GFP_KERNEL, nr_rec_secs); | |
a4bd217b JG |
37 | |
38 | bio->bi_iter.bi_sector = 0; | |
39 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); | |
40 | rqd->bio = bio; | |
41 | rqd->nr_ppas = nr_rec_secs; | |
42 | ||
43 | pgs_read = pblk_rb_read_to_bio_list(&pblk->rwb, bio, &recovery->failed, | |
44 | nr_rec_secs); | |
45 | if (pgs_read != nr_rec_secs) { | |
46 | pr_err("pblk: could not read recovery entries\n"); | |
47 | goto err; | |
48 | } | |
49 | ||
50 | if (pblk_setup_w_rec_rq(pblk, rqd, c_ctx)) { | |
51 | pr_err("pblk: could not setup recovery request\n"); | |
52 | goto err; | |
53 | } | |
54 | ||
55 | #ifdef CONFIG_NVM_DEBUG | |
56 | atomic_long_add(nr_rec_secs, &pblk->recov_writes); | |
57 | #endif | |
58 | ||
59 | ret = pblk_submit_io(pblk, rqd); | |
60 | if (ret) { | |
61 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
62 | goto err; | |
63 | } | |
64 | ||
65 | mempool_free(recovery, pblk->rec_pool); | |
66 | return; | |
67 | ||
68 | err: | |
69 | bio_put(bio); | |
e2cddf20 | 70 | pblk_free_rqd(pblk, rqd, PBLK_WRITE); |
a4bd217b JG |
71 | } |
72 | ||
73 | int pblk_recov_setup_rq(struct pblk *pblk, struct pblk_c_ctx *c_ctx, | |
74 | struct pblk_rec_ctx *recovery, u64 *comp_bits, | |
75 | unsigned int comp) | |
76 | { | |
77 | struct nvm_tgt_dev *dev = pblk->dev; | |
78 | int max_secs = nvm_max_phys_sects(dev); | |
79 | struct nvm_rq *rec_rqd; | |
80 | struct pblk_c_ctx *rec_ctx; | |
81 | int nr_entries = c_ctx->nr_valid + c_ctx->nr_padded; | |
82 | ||
e2cddf20 | 83 | rec_rqd = pblk_alloc_rqd(pblk, PBLK_WRITE); |
a4bd217b JG |
84 | rec_ctx = nvm_rq_to_pdu(rec_rqd); |
85 | ||
86 | /* Copy completion bitmap, but exclude the first X completed entries */ | |
87 | bitmap_shift_right((unsigned long int *)&rec_rqd->ppa_status, | |
88 | (unsigned long int *)comp_bits, | |
89 | comp, max_secs); | |
90 | ||
91 | /* Save the context for the entries that need to be re-written and | |
92 | * update current context with the completed entries. | |
93 | */ | |
94 | rec_ctx->sentry = pblk_rb_wrap_pos(&pblk->rwb, c_ctx->sentry + comp); | |
95 | if (comp >= c_ctx->nr_valid) { | |
96 | rec_ctx->nr_valid = 0; | |
97 | rec_ctx->nr_padded = nr_entries - comp; | |
98 | ||
99 | c_ctx->nr_padded = comp - c_ctx->nr_valid; | |
100 | } else { | |
101 | rec_ctx->nr_valid = c_ctx->nr_valid - comp; | |
102 | rec_ctx->nr_padded = c_ctx->nr_padded; | |
103 | ||
104 | c_ctx->nr_valid = comp; | |
105 | c_ctx->nr_padded = 0; | |
106 | } | |
107 | ||
108 | recovery->rqd = rec_rqd; | |
109 | recovery->pblk = pblk; | |
110 | ||
111 | return 0; | |
112 | } | |
113 | ||
06bc072b | 114 | int pblk_recov_check_emeta(struct pblk *pblk, struct line_emeta *emeta_buf) |
a4bd217b JG |
115 | { |
116 | u32 crc; | |
117 | ||
dd2a4343 JG |
118 | crc = pblk_calc_emeta_crc(pblk, emeta_buf); |
119 | if (le32_to_cpu(emeta_buf->crc) != crc) | |
06bc072b | 120 | return 1; |
a4bd217b | 121 | |
dd2a4343 | 122 | if (le32_to_cpu(emeta_buf->header.identifier) != PBLK_MAGIC) |
06bc072b | 123 | return 1; |
a4bd217b | 124 | |
06bc072b | 125 | return 0; |
a4bd217b JG |
126 | } |
127 | ||
128 | static int pblk_recov_l2p_from_emeta(struct pblk *pblk, struct pblk_line *line) | |
129 | { | |
130 | struct nvm_tgt_dev *dev = pblk->dev; | |
131 | struct nvm_geo *geo = &dev->geo; | |
132 | struct pblk_line_meta *lm = &pblk->lm; | |
dd2a4343 JG |
133 | struct pblk_emeta *emeta = line->emeta; |
134 | struct line_emeta *emeta_buf = emeta->buf; | |
a4bd217b | 135 | __le64 *lba_list; |
75610cd9 HH |
136 | u64 data_start, data_end; |
137 | u64 nr_valid_lbas, nr_lbas = 0; | |
138 | u64 i; | |
a4bd217b | 139 | |
06bc072b | 140 | lba_list = emeta_to_lbas(pblk, emeta_buf); |
a4bd217b JG |
141 | if (!lba_list) |
142 | return 1; | |
143 | ||
144 | data_start = pblk_line_smeta_start(pblk, line) + lm->smeta_sec; | |
75610cd9 | 145 | data_end = line->emeta_ssec; |
dd2a4343 | 146 | nr_valid_lbas = le64_to_cpu(emeta_buf->nr_valid_lbas); |
a4bd217b | 147 | |
92957091 | 148 | for (i = data_start; i < data_end; i++) { |
a4bd217b JG |
149 | struct ppa_addr ppa; |
150 | int pos; | |
151 | ||
b1bcfda1 | 152 | ppa = addr_to_gen_ppa(pblk, i, line->id); |
a4bd217b JG |
153 | pos = pblk_ppa_to_pos(geo, ppa); |
154 | ||
155 | /* Do not update bad blocks */ | |
156 | if (test_bit(pos, line->blk_bitmap)) | |
157 | continue; | |
158 | ||
159 | if (le64_to_cpu(lba_list[i]) == ADDR_EMPTY) { | |
160 | spin_lock(&line->lock); | |
161 | if (test_and_set_bit(i, line->invalid_bitmap)) | |
2a79efd8 | 162 | WARN_ONCE(1, "pblk: rec. double invalidate:\n"); |
a4bd217b | 163 | else |
dd2a4343 | 164 | le32_add_cpu(line->vsc, -1); |
a4bd217b JG |
165 | spin_unlock(&line->lock); |
166 | ||
167 | continue; | |
168 | } | |
169 | ||
170 | pblk_update_map(pblk, le64_to_cpu(lba_list[i]), ppa); | |
171 | nr_lbas++; | |
172 | } | |
173 | ||
174 | if (nr_valid_lbas != nr_lbas) | |
75610cd9 HH |
175 | pr_err("pblk: line %d - inconsistent lba list(%llu/%llu)\n", |
176 | line->id, nr_valid_lbas, nr_lbas); | |
a4bd217b JG |
177 | |
178 | line->left_msecs = 0; | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
183 | static int pblk_calc_sec_in_line(struct pblk *pblk, struct pblk_line *line) | |
184 | { | |
185 | struct nvm_tgt_dev *dev = pblk->dev; | |
186 | struct nvm_geo *geo = &dev->geo; | |
187 | struct pblk_line_meta *lm = &pblk->lm; | |
188 | int nr_bb = bitmap_weight(line->blk_bitmap, lm->blk_per_line); | |
189 | ||
dd2a4343 | 190 | return lm->sec_per_line - lm->smeta_sec - lm->emeta_sec[0] - |
fae7fae4 | 191 | nr_bb * geo->sec_per_chk; |
a4bd217b JG |
192 | } |
193 | ||
194 | struct pblk_recov_alloc { | |
195 | struct ppa_addr *ppa_list; | |
196 | struct pblk_sec_meta *meta_list; | |
197 | struct nvm_rq *rqd; | |
198 | void *data; | |
199 | dma_addr_t dma_ppa_list; | |
200 | dma_addr_t dma_meta_list; | |
201 | }; | |
202 | ||
203 | static int pblk_recov_read_oob(struct pblk *pblk, struct pblk_line *line, | |
204 | struct pblk_recov_alloc p, u64 r_ptr) | |
205 | { | |
206 | struct nvm_tgt_dev *dev = pblk->dev; | |
207 | struct nvm_geo *geo = &dev->geo; | |
208 | struct ppa_addr *ppa_list; | |
209 | struct pblk_sec_meta *meta_list; | |
210 | struct nvm_rq *rqd; | |
211 | struct bio *bio; | |
212 | void *data; | |
213 | dma_addr_t dma_ppa_list, dma_meta_list; | |
214 | u64 r_ptr_int; | |
215 | int left_ppas; | |
216 | int rq_ppas, rq_len; | |
217 | int i, j; | |
218 | int ret = 0; | |
a4bd217b JG |
219 | |
220 | ppa_list = p.ppa_list; | |
221 | meta_list = p.meta_list; | |
222 | rqd = p.rqd; | |
223 | data = p.data; | |
224 | dma_ppa_list = p.dma_ppa_list; | |
225 | dma_meta_list = p.dma_meta_list; | |
226 | ||
227 | left_ppas = line->cur_sec - r_ptr; | |
228 | if (!left_ppas) | |
229 | return 0; | |
230 | ||
231 | r_ptr_int = r_ptr; | |
232 | ||
233 | next_read_rq: | |
084ec9ba | 234 | memset(rqd, 0, pblk_g_rq_size); |
a4bd217b JG |
235 | |
236 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
237 | if (!rq_ppas) | |
238 | rq_ppas = pblk->min_write_pgs; | |
239 | rq_len = rq_ppas * geo->sec_size; | |
240 | ||
241 | bio = bio_map_kern(dev->q, data, rq_len, GFP_KERNEL); | |
242 | if (IS_ERR(bio)) | |
243 | return PTR_ERR(bio); | |
244 | ||
245 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
246 | bio_set_op_attrs(bio, REQ_OP_READ, 0); | |
247 | ||
248 | rqd->bio = bio; | |
249 | rqd->opcode = NVM_OP_PREAD; | |
a4bd217b JG |
250 | rqd->meta_list = meta_list; |
251 | rqd->nr_ppas = rq_ppas; | |
252 | rqd->ppa_list = ppa_list; | |
253 | rqd->dma_ppa_list = dma_ppa_list; | |
254 | rqd->dma_meta_list = dma_meta_list; | |
a4bd217b | 255 | |
f9c10152 JG |
256 | if (pblk_io_aligned(pblk, rq_ppas)) |
257 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL); | |
258 | else | |
259 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM); | |
260 | ||
a4bd217b JG |
261 | for (i = 0; i < rqd->nr_ppas; ) { |
262 | struct ppa_addr ppa; | |
263 | int pos; | |
264 | ||
265 | ppa = addr_to_gen_ppa(pblk, r_ptr_int, line->id); | |
b1bcfda1 | 266 | pos = pblk_ppa_to_pos(geo, ppa); |
a4bd217b JG |
267 | |
268 | while (test_bit(pos, line->blk_bitmap)) { | |
269 | r_ptr_int += pblk->min_write_pgs; | |
270 | ppa = addr_to_gen_ppa(pblk, r_ptr_int, line->id); | |
b1bcfda1 | 271 | pos = pblk_ppa_to_pos(geo, ppa); |
a4bd217b JG |
272 | } |
273 | ||
274 | for (j = 0; j < pblk->min_write_pgs; j++, i++, r_ptr_int++) | |
275 | rqd->ppa_list[i] = | |
276 | addr_to_gen_ppa(pblk, r_ptr_int, line->id); | |
277 | } | |
278 | ||
279 | /* If read fails, more padding is needed */ | |
1a94b2d4 | 280 | ret = pblk_submit_io_sync(pblk, rqd); |
a4bd217b JG |
281 | if (ret) { |
282 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
283 | return ret; | |
284 | } | |
285 | ||
588726d3 | 286 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
287 | |
288 | /* At this point, the read should not fail. If it does, it is a problem | |
289 | * we cannot recover from here. Need FTL log. | |
290 | */ | |
5d201f07 | 291 | if (rqd->error && rqd->error != NVM_RSP_WARN_HIGHECC) { |
a4bd217b JG |
292 | pr_err("pblk: L2P recovery failed (%d)\n", rqd->error); |
293 | return -EINTR; | |
294 | } | |
295 | ||
296 | for (i = 0; i < rqd->nr_ppas; i++) { | |
297 | u64 lba = le64_to_cpu(meta_list[i].lba); | |
298 | ||
299 | if (lba == ADDR_EMPTY || lba > pblk->rl.nr_secs) | |
300 | continue; | |
301 | ||
302 | pblk_update_map(pblk, lba, rqd->ppa_list[i]); | |
303 | } | |
304 | ||
305 | left_ppas -= rq_ppas; | |
306 | if (left_ppas > 0) | |
307 | goto next_read_rq; | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
ee8d5c1a JG |
312 | static void pblk_recov_complete(struct kref *ref) |
313 | { | |
314 | struct pblk_pad_rq *pad_rq = container_of(ref, struct pblk_pad_rq, ref); | |
315 | ||
316 | complete(&pad_rq->wait); | |
317 | } | |
318 | ||
319 | static void pblk_end_io_recov(struct nvm_rq *rqd) | |
320 | { | |
321 | struct pblk_pad_rq *pad_rq = rqd->private; | |
322 | struct pblk *pblk = pad_rq->pblk; | |
ee8d5c1a | 323 | |
3eaa11e2 JG |
324 | pblk_up_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
325 | ||
e2cddf20 | 326 | pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); |
3eaa11e2 JG |
327 | |
328 | atomic_dec(&pblk->inflight_io); | |
329 | kref_put(&pad_rq->ref, pblk_recov_complete); | |
ee8d5c1a JG |
330 | } |
331 | ||
a4bd217b | 332 | static int pblk_recov_pad_oob(struct pblk *pblk, struct pblk_line *line, |
ee8d5c1a | 333 | int left_ppas) |
a4bd217b JG |
334 | { |
335 | struct nvm_tgt_dev *dev = pblk->dev; | |
336 | struct nvm_geo *geo = &dev->geo; | |
337 | struct ppa_addr *ppa_list; | |
338 | struct pblk_sec_meta *meta_list; | |
ee8d5c1a | 339 | struct pblk_pad_rq *pad_rq; |
a4bd217b JG |
340 | struct nvm_rq *rqd; |
341 | struct bio *bio; | |
342 | void *data; | |
343 | dma_addr_t dma_ppa_list, dma_meta_list; | |
dd2a4343 | 344 | __le64 *lba_list = emeta_to_lbas(pblk, line->emeta->buf); |
a4bd217b | 345 | u64 w_ptr = line->cur_sec; |
ee8d5c1a | 346 | int left_line_ppas, rq_ppas, rq_len; |
a4bd217b JG |
347 | int i, j; |
348 | int ret = 0; | |
a4bd217b | 349 | |
ee8d5c1a JG |
350 | spin_lock(&line->lock); |
351 | left_line_ppas = line->left_msecs; | |
352 | spin_unlock(&line->lock); | |
353 | ||
354 | pad_rq = kmalloc(sizeof(struct pblk_pad_rq), GFP_KERNEL); | |
355 | if (!pad_rq) | |
356 | return -ENOMEM; | |
357 | ||
358 | data = vzalloc(pblk->max_write_pgs * geo->sec_size); | |
359 | if (!data) { | |
360 | ret = -ENOMEM; | |
361 | goto free_rq; | |
362 | } | |
363 | ||
364 | pad_rq->pblk = pblk; | |
365 | init_completion(&pad_rq->wait); | |
366 | kref_init(&pad_rq->ref); | |
a4bd217b JG |
367 | |
368 | next_pad_rq: | |
369 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
ee8d5c1a JG |
370 | if (rq_ppas < pblk->min_write_pgs) { |
371 | pr_err("pblk: corrupted pad line %d\n", line->id); | |
3eaa11e2 | 372 | goto fail_free_pad; |
ee8d5c1a JG |
373 | } |
374 | ||
a4bd217b JG |
375 | rq_len = rq_ppas * geo->sec_size; |
376 | ||
ee8d5c1a JG |
377 | meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, &dma_meta_list); |
378 | if (!meta_list) { | |
379 | ret = -ENOMEM; | |
3eaa11e2 | 380 | goto fail_free_pad; |
ee8d5c1a JG |
381 | } |
382 | ||
383 | ppa_list = (void *)(meta_list) + pblk_dma_meta_size; | |
384 | dma_ppa_list = dma_meta_list + pblk_dma_meta_size; | |
385 | ||
3eaa11e2 JG |
386 | bio = pblk_bio_map_addr(pblk, data, rq_ppas, rq_len, |
387 | PBLK_VMALLOC_META, GFP_KERNEL); | |
ee8d5c1a JG |
388 | if (IS_ERR(bio)) { |
389 | ret = PTR_ERR(bio); | |
2942f50f | 390 | goto fail_free_meta; |
ee8d5c1a | 391 | } |
a4bd217b JG |
392 | |
393 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
394 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); | |
395 | ||
e2cddf20 | 396 | rqd = pblk_alloc_rqd(pblk, PBLK_WRITE_INT); |
2942f50f | 397 | |
a4bd217b JG |
398 | rqd->bio = bio; |
399 | rqd->opcode = NVM_OP_PWRITE; | |
e2cddf20 | 400 | rqd->flags = pblk_set_progr_mode(pblk, PBLK_WRITE); |
a4bd217b JG |
401 | rqd->meta_list = meta_list; |
402 | rqd->nr_ppas = rq_ppas; | |
403 | rqd->ppa_list = ppa_list; | |
404 | rqd->dma_ppa_list = dma_ppa_list; | |
405 | rqd->dma_meta_list = dma_meta_list; | |
ee8d5c1a JG |
406 | rqd->end_io = pblk_end_io_recov; |
407 | rqd->private = pad_rq; | |
a4bd217b JG |
408 | |
409 | for (i = 0; i < rqd->nr_ppas; ) { | |
410 | struct ppa_addr ppa; | |
411 | int pos; | |
412 | ||
413 | w_ptr = pblk_alloc_page(pblk, line, pblk->min_write_pgs); | |
b1bcfda1 | 414 | ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); |
a4bd217b JG |
415 | pos = pblk_ppa_to_pos(geo, ppa); |
416 | ||
417 | while (test_bit(pos, line->blk_bitmap)) { | |
418 | w_ptr += pblk->min_write_pgs; | |
b1bcfda1 | 419 | ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); |
a4bd217b JG |
420 | pos = pblk_ppa_to_pos(geo, ppa); |
421 | } | |
422 | ||
423 | for (j = 0; j < pblk->min_write_pgs; j++, i++, w_ptr++) { | |
424 | struct ppa_addr dev_ppa; | |
f417aa0b | 425 | __le64 addr_empty = cpu_to_le64(ADDR_EMPTY); |
a4bd217b JG |
426 | |
427 | dev_ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); | |
428 | ||
429 | pblk_map_invalidate(pblk, dev_ppa); | |
caa69fa5 | 430 | lba_list[w_ptr] = meta_list[i].lba = addr_empty; |
a4bd217b JG |
431 | rqd->ppa_list[i] = dev_ppa; |
432 | } | |
433 | } | |
434 | ||
ee8d5c1a | 435 | kref_get(&pad_rq->ref); |
3eaa11e2 | 436 | pblk_down_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
ee8d5c1a | 437 | |
a4bd217b JG |
438 | ret = pblk_submit_io(pblk, rqd); |
439 | if (ret) { | |
440 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
3eaa11e2 JG |
441 | pblk_up_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
442 | goto fail_free_bio; | |
a4bd217b JG |
443 | } |
444 | ||
a4bd217b JG |
445 | left_line_ppas -= rq_ppas; |
446 | left_ppas -= rq_ppas; | |
ee8d5c1a | 447 | if (left_ppas && left_line_ppas) |
a4bd217b JG |
448 | goto next_pad_rq; |
449 | ||
ee8d5c1a JG |
450 | kref_put(&pad_rq->ref, pblk_recov_complete); |
451 | ||
452 | if (!wait_for_completion_io_timeout(&pad_rq->wait, | |
453 | msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) { | |
454 | pr_err("pblk: pad write timed out\n"); | |
455 | ret = -ETIME; | |
456 | } | |
457 | ||
3eaa11e2 JG |
458 | if (!pblk_line_is_full(line)) |
459 | pr_err("pblk: corrupted padded line: %d\n", line->id); | |
460 | ||
461 | vfree(data); | |
ee8d5c1a JG |
462 | free_rq: |
463 | kfree(pad_rq); | |
ee8d5c1a JG |
464 | return ret; |
465 | ||
3eaa11e2 JG |
466 | fail_free_bio: |
467 | bio_put(bio); | |
ee8d5c1a JG |
468 | fail_free_meta: |
469 | nvm_dev_dma_free(dev->parent, meta_list, dma_meta_list); | |
3eaa11e2 | 470 | fail_free_pad: |
ee8d5c1a | 471 | kfree(pad_rq); |
3eaa11e2 | 472 | vfree(data); |
ee8d5c1a | 473 | return ret; |
a4bd217b JG |
474 | } |
475 | ||
476 | /* When this function is called, it means that not all upper pages have been | |
477 | * written in a page that contains valid data. In order to recover this data, we | |
478 | * first find the write pointer on the device, then we pad all necessary | |
479 | * sectors, and finally attempt to read the valid data | |
480 | */ | |
481 | static int pblk_recov_scan_all_oob(struct pblk *pblk, struct pblk_line *line, | |
482 | struct pblk_recov_alloc p) | |
483 | { | |
484 | struct nvm_tgt_dev *dev = pblk->dev; | |
485 | struct nvm_geo *geo = &dev->geo; | |
486 | struct ppa_addr *ppa_list; | |
487 | struct pblk_sec_meta *meta_list; | |
488 | struct nvm_rq *rqd; | |
489 | struct bio *bio; | |
490 | void *data; | |
491 | dma_addr_t dma_ppa_list, dma_meta_list; | |
492 | u64 w_ptr = 0, r_ptr; | |
493 | int rq_ppas, rq_len; | |
494 | int i, j; | |
495 | int ret = 0; | |
496 | int rec_round; | |
497 | int left_ppas = pblk_calc_sec_in_line(pblk, line) - line->cur_sec; | |
a4bd217b JG |
498 | |
499 | ppa_list = p.ppa_list; | |
500 | meta_list = p.meta_list; | |
501 | rqd = p.rqd; | |
502 | data = p.data; | |
503 | dma_ppa_list = p.dma_ppa_list; | |
504 | dma_meta_list = p.dma_meta_list; | |
505 | ||
506 | /* we could recover up until the line write pointer */ | |
507 | r_ptr = line->cur_sec; | |
508 | rec_round = 0; | |
509 | ||
510 | next_rq: | |
084ec9ba | 511 | memset(rqd, 0, pblk_g_rq_size); |
a4bd217b JG |
512 | |
513 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
514 | if (!rq_ppas) | |
515 | rq_ppas = pblk->min_write_pgs; | |
516 | rq_len = rq_ppas * geo->sec_size; | |
517 | ||
518 | bio = bio_map_kern(dev->q, data, rq_len, GFP_KERNEL); | |
519 | if (IS_ERR(bio)) | |
520 | return PTR_ERR(bio); | |
521 | ||
522 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
523 | bio_set_op_attrs(bio, REQ_OP_READ, 0); | |
524 | ||
525 | rqd->bio = bio; | |
526 | rqd->opcode = NVM_OP_PREAD; | |
a4bd217b JG |
527 | rqd->meta_list = meta_list; |
528 | rqd->nr_ppas = rq_ppas; | |
529 | rqd->ppa_list = ppa_list; | |
530 | rqd->dma_ppa_list = dma_ppa_list; | |
531 | rqd->dma_meta_list = dma_meta_list; | |
a4bd217b | 532 | |
f9c10152 JG |
533 | if (pblk_io_aligned(pblk, rq_ppas)) |
534 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL); | |
535 | else | |
536 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM); | |
537 | ||
a4bd217b JG |
538 | for (i = 0; i < rqd->nr_ppas; ) { |
539 | struct ppa_addr ppa; | |
540 | int pos; | |
541 | ||
542 | w_ptr = pblk_alloc_page(pblk, line, pblk->min_write_pgs); | |
543 | ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); | |
b1bcfda1 | 544 | pos = pblk_ppa_to_pos(geo, ppa); |
a4bd217b JG |
545 | |
546 | while (test_bit(pos, line->blk_bitmap)) { | |
547 | w_ptr += pblk->min_write_pgs; | |
548 | ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); | |
b1bcfda1 | 549 | pos = pblk_ppa_to_pos(geo, ppa); |
a4bd217b JG |
550 | } |
551 | ||
552 | for (j = 0; j < pblk->min_write_pgs; j++, i++, w_ptr++) | |
553 | rqd->ppa_list[i] = | |
554 | addr_to_gen_ppa(pblk, w_ptr, line->id); | |
555 | } | |
556 | ||
1a94b2d4 | 557 | ret = pblk_submit_io_sync(pblk, rqd); |
a4bd217b JG |
558 | if (ret) { |
559 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
560 | return ret; | |
561 | } | |
562 | ||
588726d3 | 563 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
564 | |
565 | /* This should not happen since the read failed during normal recovery, | |
566 | * but the media works funny sometimes... | |
567 | */ | |
568 | if (!rec_round++ && !rqd->error) { | |
569 | rec_round = 0; | |
570 | for (i = 0; i < rqd->nr_ppas; i++, r_ptr++) { | |
571 | u64 lba = le64_to_cpu(meta_list[i].lba); | |
572 | ||
573 | if (lba == ADDR_EMPTY || lba > pblk->rl.nr_secs) | |
574 | continue; | |
575 | ||
576 | pblk_update_map(pblk, lba, rqd->ppa_list[i]); | |
577 | } | |
578 | } | |
579 | ||
580 | /* Reached the end of the written line */ | |
581 | if (rqd->error == NVM_RSP_ERR_EMPTYPAGE) { | |
582 | int pad_secs, nr_error_bits, bit; | |
583 | int ret; | |
584 | ||
585 | bit = find_first_bit((void *)&rqd->ppa_status, rqd->nr_ppas); | |
586 | nr_error_bits = rqd->nr_ppas - bit; | |
587 | ||
588 | /* Roll back failed sectors */ | |
589 | line->cur_sec -= nr_error_bits; | |
590 | line->left_msecs += nr_error_bits; | |
591 | bitmap_clear(line->map_bitmap, line->cur_sec, nr_error_bits); | |
592 | ||
593 | pad_secs = pblk_pad_distance(pblk); | |
594 | if (pad_secs > line->left_msecs) | |
595 | pad_secs = line->left_msecs; | |
596 | ||
ee8d5c1a | 597 | ret = pblk_recov_pad_oob(pblk, line, pad_secs); |
a4bd217b JG |
598 | if (ret) |
599 | pr_err("pblk: OOB padding failed (err:%d)\n", ret); | |
600 | ||
601 | ret = pblk_recov_read_oob(pblk, line, p, r_ptr); | |
602 | if (ret) | |
603 | pr_err("pblk: OOB read failed (err:%d)\n", ret); | |
604 | ||
a4bd217b JG |
605 | left_ppas = 0; |
606 | } | |
607 | ||
608 | left_ppas -= rq_ppas; | |
609 | if (left_ppas > 0) | |
610 | goto next_rq; | |
611 | ||
612 | return ret; | |
613 | } | |
614 | ||
615 | static int pblk_recov_scan_oob(struct pblk *pblk, struct pblk_line *line, | |
616 | struct pblk_recov_alloc p, int *done) | |
617 | { | |
618 | struct nvm_tgt_dev *dev = pblk->dev; | |
619 | struct nvm_geo *geo = &dev->geo; | |
620 | struct ppa_addr *ppa_list; | |
621 | struct pblk_sec_meta *meta_list; | |
622 | struct nvm_rq *rqd; | |
623 | struct bio *bio; | |
624 | void *data; | |
625 | dma_addr_t dma_ppa_list, dma_meta_list; | |
626 | u64 paddr; | |
627 | int rq_ppas, rq_len; | |
628 | int i, j; | |
629 | int ret = 0; | |
630 | int left_ppas = pblk_calc_sec_in_line(pblk, line); | |
a4bd217b JG |
631 | |
632 | ppa_list = p.ppa_list; | |
633 | meta_list = p.meta_list; | |
634 | rqd = p.rqd; | |
635 | data = p.data; | |
636 | dma_ppa_list = p.dma_ppa_list; | |
637 | dma_meta_list = p.dma_meta_list; | |
638 | ||
639 | *done = 1; | |
640 | ||
641 | next_rq: | |
084ec9ba | 642 | memset(rqd, 0, pblk_g_rq_size); |
a4bd217b JG |
643 | |
644 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
645 | if (!rq_ppas) | |
646 | rq_ppas = pblk->min_write_pgs; | |
647 | rq_len = rq_ppas * geo->sec_size; | |
648 | ||
649 | bio = bio_map_kern(dev->q, data, rq_len, GFP_KERNEL); | |
650 | if (IS_ERR(bio)) | |
651 | return PTR_ERR(bio); | |
652 | ||
653 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
654 | bio_set_op_attrs(bio, REQ_OP_READ, 0); | |
655 | ||
656 | rqd->bio = bio; | |
657 | rqd->opcode = NVM_OP_PREAD; | |
a4bd217b JG |
658 | rqd->meta_list = meta_list; |
659 | rqd->nr_ppas = rq_ppas; | |
660 | rqd->ppa_list = ppa_list; | |
661 | rqd->dma_ppa_list = dma_ppa_list; | |
662 | rqd->dma_meta_list = dma_meta_list; | |
a4bd217b | 663 | |
f9c10152 JG |
664 | if (pblk_io_aligned(pblk, rq_ppas)) |
665 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL); | |
666 | else | |
667 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM); | |
668 | ||
a4bd217b JG |
669 | for (i = 0; i < rqd->nr_ppas; ) { |
670 | struct ppa_addr ppa; | |
671 | int pos; | |
672 | ||
673 | paddr = pblk_alloc_page(pblk, line, pblk->min_write_pgs); | |
674 | ppa = addr_to_gen_ppa(pblk, paddr, line->id); | |
b1bcfda1 | 675 | pos = pblk_ppa_to_pos(geo, ppa); |
a4bd217b JG |
676 | |
677 | while (test_bit(pos, line->blk_bitmap)) { | |
678 | paddr += pblk->min_write_pgs; | |
679 | ppa = addr_to_gen_ppa(pblk, paddr, line->id); | |
b1bcfda1 | 680 | pos = pblk_ppa_to_pos(geo, ppa); |
a4bd217b JG |
681 | } |
682 | ||
683 | for (j = 0; j < pblk->min_write_pgs; j++, i++, paddr++) | |
684 | rqd->ppa_list[i] = | |
685 | addr_to_gen_ppa(pblk, paddr, line->id); | |
686 | } | |
687 | ||
1a94b2d4 | 688 | ret = pblk_submit_io_sync(pblk, rqd); |
a4bd217b JG |
689 | if (ret) { |
690 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
691 | bio_put(bio); | |
692 | return ret; | |
693 | } | |
694 | ||
588726d3 | 695 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
696 | |
697 | /* Reached the end of the written line */ | |
698 | if (rqd->error) { | |
699 | int nr_error_bits, bit; | |
700 | ||
701 | bit = find_first_bit((void *)&rqd->ppa_status, rqd->nr_ppas); | |
702 | nr_error_bits = rqd->nr_ppas - bit; | |
703 | ||
704 | /* Roll back failed sectors */ | |
705 | line->cur_sec -= nr_error_bits; | |
706 | line->left_msecs += nr_error_bits; | |
a4bd217b JG |
707 | bitmap_clear(line->map_bitmap, line->cur_sec, nr_error_bits); |
708 | ||
709 | left_ppas = 0; | |
710 | rqd->nr_ppas = bit; | |
711 | ||
712 | if (rqd->error != NVM_RSP_ERR_EMPTYPAGE) | |
713 | *done = 0; | |
714 | } | |
715 | ||
716 | for (i = 0; i < rqd->nr_ppas; i++) { | |
717 | u64 lba = le64_to_cpu(meta_list[i].lba); | |
718 | ||
719 | if (lba == ADDR_EMPTY || lba > pblk->rl.nr_secs) | |
720 | continue; | |
721 | ||
722 | pblk_update_map(pblk, lba, rqd->ppa_list[i]); | |
723 | } | |
724 | ||
725 | left_ppas -= rq_ppas; | |
726 | if (left_ppas > 0) | |
727 | goto next_rq; | |
728 | ||
729 | return ret; | |
730 | } | |
731 | ||
732 | /* Scan line for lbas on out of bound area */ | |
733 | static int pblk_recov_l2p_from_oob(struct pblk *pblk, struct pblk_line *line) | |
734 | { | |
735 | struct nvm_tgt_dev *dev = pblk->dev; | |
736 | struct nvm_geo *geo = &dev->geo; | |
737 | struct nvm_rq *rqd; | |
738 | struct ppa_addr *ppa_list; | |
739 | struct pblk_sec_meta *meta_list; | |
740 | struct pblk_recov_alloc p; | |
741 | void *data; | |
742 | dma_addr_t dma_ppa_list, dma_meta_list; | |
743 | int done, ret = 0; | |
744 | ||
a4bd217b | 745 | meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, &dma_meta_list); |
2942f50f JG |
746 | if (!meta_list) |
747 | return -ENOMEM; | |
a4bd217b JG |
748 | |
749 | ppa_list = (void *)(meta_list) + pblk_dma_meta_size; | |
750 | dma_ppa_list = dma_meta_list + pblk_dma_meta_size; | |
751 | ||
752 | data = kcalloc(pblk->max_write_pgs, geo->sec_size, GFP_KERNEL); | |
753 | if (!data) { | |
754 | ret = -ENOMEM; | |
755 | goto free_meta_list; | |
756 | } | |
757 | ||
e2cddf20 | 758 | rqd = pblk_alloc_rqd(pblk, PBLK_READ); |
2942f50f | 759 | |
a4bd217b JG |
760 | p.ppa_list = ppa_list; |
761 | p.meta_list = meta_list; | |
762 | p.rqd = rqd; | |
763 | p.data = data; | |
764 | p.dma_ppa_list = dma_ppa_list; | |
765 | p.dma_meta_list = dma_meta_list; | |
766 | ||
767 | ret = pblk_recov_scan_oob(pblk, line, p, &done); | |
768 | if (ret) { | |
769 | pr_err("pblk: could not recover L2P from OOB\n"); | |
770 | goto out; | |
771 | } | |
772 | ||
773 | if (!done) { | |
774 | ret = pblk_recov_scan_all_oob(pblk, line, p); | |
775 | if (ret) { | |
776 | pr_err("pblk: could not recover L2P from OOB\n"); | |
777 | goto out; | |
778 | } | |
779 | } | |
780 | ||
781 | if (pblk_line_is_full(line)) | |
782 | pblk_line_recov_close(pblk, line); | |
783 | ||
784 | out: | |
785 | kfree(data); | |
786 | free_meta_list: | |
787 | nvm_dev_dma_free(dev->parent, meta_list, dma_meta_list); | |
a4bd217b JG |
788 | |
789 | return ret; | |
790 | } | |
791 | ||
792 | /* Insert lines ordered by sequence number (seq_num) on list */ | |
793 | static void pblk_recov_line_add_ordered(struct list_head *head, | |
794 | struct pblk_line *line) | |
795 | { | |
796 | struct pblk_line *t = NULL; | |
797 | ||
798 | list_for_each_entry(t, head, list) | |
799 | if (t->seq_nr > line->seq_nr) | |
800 | break; | |
801 | ||
802 | __list_add(&line->list, t->list.prev, &t->list); | |
803 | } | |
804 | ||
75610cd9 | 805 | static u64 pblk_line_emeta_start(struct pblk *pblk, struct pblk_line *line) |
a4bd217b JG |
806 | { |
807 | struct nvm_tgt_dev *dev = pblk->dev; | |
808 | struct nvm_geo *geo = &dev->geo; | |
75610cd9 HH |
809 | struct pblk_line_meta *lm = &pblk->lm; |
810 | unsigned int emeta_secs; | |
811 | u64 emeta_start; | |
812 | struct ppa_addr ppa; | |
813 | int pos; | |
814 | ||
815 | emeta_secs = lm->emeta_sec[0]; | |
816 | emeta_start = lm->sec_per_line; | |
817 | ||
818 | while (emeta_secs) { | |
819 | emeta_start--; | |
b1bcfda1 | 820 | ppa = addr_to_gen_ppa(pblk, emeta_start, line->id); |
75610cd9 HH |
821 | pos = pblk_ppa_to_pos(geo, ppa); |
822 | if (!test_bit(pos, line->blk_bitmap)) | |
823 | emeta_secs--; | |
824 | } | |
825 | ||
826 | return emeta_start; | |
827 | } | |
828 | ||
829 | struct pblk_line *pblk_recov_l2p(struct pblk *pblk) | |
830 | { | |
a4bd217b JG |
831 | struct pblk_line_meta *lm = &pblk->lm; |
832 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
833 | struct pblk_line *line, *tline, *data_line = NULL; | |
dd2a4343 JG |
834 | struct pblk_smeta *smeta; |
835 | struct pblk_emeta *emeta; | |
836 | struct line_smeta *smeta_buf; | |
a4bd217b JG |
837 | int found_lines = 0, recovered_lines = 0, open_lines = 0; |
838 | int is_next = 0; | |
839 | int meta_line; | |
840 | int i, valid_uuid = 0; | |
841 | LIST_HEAD(recov_list); | |
842 | ||
843 | /* TODO: Implement FTL snapshot */ | |
844 | ||
845 | /* Scan recovery - takes place when FTL snapshot fails */ | |
846 | spin_lock(&l_mg->free_lock); | |
847 | meta_line = find_first_zero_bit(&l_mg->meta_bitmap, PBLK_DATA_LINES); | |
848 | set_bit(meta_line, &l_mg->meta_bitmap); | |
dd2a4343 JG |
849 | smeta = l_mg->sline_meta[meta_line]; |
850 | emeta = l_mg->eline_meta[meta_line]; | |
8224cbd8 | 851 | smeta_buf = (struct line_smeta *)smeta; |
a4bd217b JG |
852 | spin_unlock(&l_mg->free_lock); |
853 | ||
854 | /* Order data lines using their sequence number */ | |
855 | for (i = 0; i < l_mg->nr_lines; i++) { | |
856 | u32 crc; | |
857 | ||
858 | line = &pblk->lines[i]; | |
859 | ||
860 | memset(smeta, 0, lm->smeta_len); | |
861 | line->smeta = smeta; | |
dd2a4343 | 862 | line->lun_bitmap = ((void *)(smeta_buf)) + |
a4bd217b JG |
863 | sizeof(struct line_smeta); |
864 | ||
865 | /* Lines that cannot be read are assumed as not written here */ | |
866 | if (pblk_line_read_smeta(pblk, line)) | |
867 | continue; | |
868 | ||
dd2a4343 JG |
869 | crc = pblk_calc_smeta_crc(pblk, smeta_buf); |
870 | if (le32_to_cpu(smeta_buf->crc) != crc) | |
a4bd217b JG |
871 | continue; |
872 | ||
dd2a4343 | 873 | if (le32_to_cpu(smeta_buf->header.identifier) != PBLK_MAGIC) |
a4bd217b JG |
874 | continue; |
875 | ||
c79819bc | 876 | if (smeta_buf->header.version != SMETA_VERSION) { |
a4bd217b | 877 | pr_err("pblk: found incompatible line version %u\n", |
c79819bc | 878 | le16_to_cpu(smeta_buf->header.version)); |
a4bd217b JG |
879 | return ERR_PTR(-EINVAL); |
880 | } | |
881 | ||
882 | /* The first valid instance uuid is used for initialization */ | |
883 | if (!valid_uuid) { | |
dd2a4343 | 884 | memcpy(pblk->instance_uuid, smeta_buf->header.uuid, 16); |
a4bd217b JG |
885 | valid_uuid = 1; |
886 | } | |
887 | ||
dd2a4343 | 888 | if (memcmp(pblk->instance_uuid, smeta_buf->header.uuid, 16)) { |
a4bd217b JG |
889 | pr_debug("pblk: ignore line %u due to uuid mismatch\n", |
890 | i); | |
891 | continue; | |
892 | } | |
893 | ||
894 | /* Update line metadata */ | |
895 | spin_lock(&line->lock); | |
dd2a4343 JG |
896 | line->id = le32_to_cpu(smeta_buf->header.id); |
897 | line->type = le16_to_cpu(smeta_buf->header.type); | |
898 | line->seq_nr = le64_to_cpu(smeta_buf->seq_nr); | |
a4bd217b JG |
899 | spin_unlock(&line->lock); |
900 | ||
901 | /* Update general metadata */ | |
902 | spin_lock(&l_mg->free_lock); | |
903 | if (line->seq_nr >= l_mg->d_seq_nr) | |
904 | l_mg->d_seq_nr = line->seq_nr + 1; | |
905 | l_mg->nr_free_lines--; | |
906 | spin_unlock(&l_mg->free_lock); | |
907 | ||
908 | if (pblk_line_recov_alloc(pblk, line)) | |
909 | goto out; | |
910 | ||
911 | pblk_recov_line_add_ordered(&recov_list, line); | |
912 | found_lines++; | |
913 | pr_debug("pblk: recovering data line %d, seq:%llu\n", | |
dd2a4343 | 914 | line->id, smeta_buf->seq_nr); |
a4bd217b JG |
915 | } |
916 | ||
917 | if (!found_lines) { | |
918 | pblk_setup_uuid(pblk); | |
919 | ||
920 | spin_lock(&l_mg->free_lock); | |
921 | WARN_ON_ONCE(!test_and_clear_bit(meta_line, | |
922 | &l_mg->meta_bitmap)); | |
923 | spin_unlock(&l_mg->free_lock); | |
924 | ||
925 | goto out; | |
926 | } | |
927 | ||
928 | /* Verify closed blocks and recover this portion of L2P table*/ | |
929 | list_for_each_entry_safe(line, tline, &recov_list, list) { | |
a4bd217b | 930 | recovered_lines++; |
a4bd217b | 931 | |
75610cd9 | 932 | line->emeta_ssec = pblk_line_emeta_start(pblk, line); |
8224cbd8 JG |
933 | line->emeta = emeta; |
934 | memset(line->emeta->buf, 0, lm->emeta_len[0]); | |
a4bd217b | 935 | |
dd2a4343 | 936 | if (pblk_line_read_emeta(pblk, line, line->emeta->buf)) { |
a4bd217b JG |
937 | pblk_recov_l2p_from_oob(pblk, line); |
938 | goto next; | |
939 | } | |
940 | ||
06bc072b HH |
941 | if (pblk_recov_check_emeta(pblk, line->emeta->buf)) { |
942 | pblk_recov_l2p_from_oob(pblk, line); | |
943 | goto next; | |
944 | } | |
945 | ||
a4bd217b JG |
946 | if (pblk_recov_l2p_from_emeta(pblk, line)) |
947 | pblk_recov_l2p_from_oob(pblk, line); | |
948 | ||
949 | next: | |
950 | if (pblk_line_is_full(line)) { | |
951 | struct list_head *move_list; | |
952 | ||
953 | spin_lock(&line->lock); | |
954 | line->state = PBLK_LINESTATE_CLOSED; | |
955 | move_list = pblk_line_gc_list(pblk, line); | |
956 | spin_unlock(&line->lock); | |
957 | ||
958 | spin_lock(&l_mg->gc_lock); | |
959 | list_move_tail(&line->list, move_list); | |
960 | spin_unlock(&l_mg->gc_lock); | |
961 | ||
e72ec1d3 | 962 | kfree(line->map_bitmap); |
a4bd217b JG |
963 | line->map_bitmap = NULL; |
964 | line->smeta = NULL; | |
965 | line->emeta = NULL; | |
966 | } else { | |
967 | if (open_lines > 1) | |
968 | pr_err("pblk: failed to recover L2P\n"); | |
969 | ||
970 | open_lines++; | |
971 | line->meta_line = meta_line; | |
972 | data_line = line; | |
973 | } | |
974 | } | |
975 | ||
976 | spin_lock(&l_mg->free_lock); | |
977 | if (!open_lines) { | |
978 | WARN_ON_ONCE(!test_and_clear_bit(meta_line, | |
979 | &l_mg->meta_bitmap)); | |
980 | pblk_line_replace_data(pblk); | |
981 | } else { | |
982 | /* Allocate next line for preparation */ | |
983 | l_mg->data_next = pblk_line_get(pblk); | |
984 | if (l_mg->data_next) { | |
985 | l_mg->data_next->seq_nr = l_mg->d_seq_nr++; | |
986 | l_mg->data_next->type = PBLK_LINETYPE_DATA; | |
987 | is_next = 1; | |
988 | } | |
989 | } | |
990 | spin_unlock(&l_mg->free_lock); | |
991 | ||
a7689938 | 992 | if (is_next) |
a4bd217b | 993 | pblk_line_erase(pblk, l_mg->data_next); |
a4bd217b JG |
994 | |
995 | out: | |
996 | if (found_lines != recovered_lines) | |
997 | pr_err("pblk: failed to recover all found lines %d/%d\n", | |
998 | found_lines, recovered_lines); | |
999 | ||
1000 | return data_line; | |
1001 | } | |
1002 | ||
1003 | /* | |
588726d3 | 1004 | * Pad current line |
a4bd217b | 1005 | */ |
588726d3 | 1006 | int pblk_recov_pad(struct pblk *pblk) |
a4bd217b | 1007 | { |
a4bd217b JG |
1008 | struct pblk_line *line; |
1009 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
588726d3 JG |
1010 | int left_msecs; |
1011 | int ret = 0; | |
a4bd217b JG |
1012 | |
1013 | spin_lock(&l_mg->free_lock); | |
1014 | line = l_mg->data_line; | |
588726d3 | 1015 | left_msecs = line->left_msecs; |
a4bd217b JG |
1016 | spin_unlock(&l_mg->free_lock); |
1017 | ||
ee8d5c1a | 1018 | ret = pblk_recov_pad_oob(pblk, line, left_msecs); |
588726d3 JG |
1019 | if (ret) { |
1020 | pr_err("pblk: Tear down padding failed (%d)\n", ret); | |
ee8d5c1a | 1021 | return ret; |
a4bd217b JG |
1022 | } |
1023 | ||
588726d3 | 1024 | pblk_line_close_meta(pblk, line); |
588726d3 | 1025 | return ret; |
a4bd217b | 1026 | } |