Commit | Line | Data |
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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 | ||
dd2a4343 | 114 | __le64 *pblk_recov_get_lba_list(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) | |
a4bd217b JG |
120 | return NULL; |
121 | ||
dd2a4343 | 122 | if (le32_to_cpu(emeta_buf->header.identifier) != PBLK_MAGIC) |
a4bd217b JG |
123 | return NULL; |
124 | ||
dd2a4343 | 125 | return emeta_to_lbas(pblk, emeta_buf); |
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 JG |
135 | __le64 *lba_list; |
136 | int data_start; | |
137 | int nr_data_lbas, nr_valid_lbas, nr_lbas = 0; | |
138 | int i; | |
139 | ||
dd2a4343 | 140 | lba_list = pblk_recov_get_lba_list(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; | |
dd2a4343 JG |
145 | nr_data_lbas = lm->sec_per_line - lm->emeta_sec[0]; |
146 | nr_valid_lbas = le64_to_cpu(emeta_buf->nr_valid_lbas); | |
a4bd217b JG |
147 | |
148 | for (i = data_start; i < nr_data_lbas && nr_lbas < nr_valid_lbas; i++) { | |
149 | struct ppa_addr ppa; | |
150 | int pos; | |
151 | ||
152 | ppa = addr_to_pblk_ppa(pblk, i, line->id); | |
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) | |
175 | pr_err("pblk: line %d - inconsistent lba list(%llu/%d)\n", | |
dd2a4343 | 176 | line->id, emeta_buf->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] - |
a4bd217b JG |
191 | nr_bb * geo->sec_per_blk; |
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; | |
219 | DECLARE_COMPLETION_ONSTACK(wait); | |
220 | ||
221 | ppa_list = p.ppa_list; | |
222 | meta_list = p.meta_list; | |
223 | rqd = p.rqd; | |
224 | data = p.data; | |
225 | dma_ppa_list = p.dma_ppa_list; | |
226 | dma_meta_list = p.dma_meta_list; | |
227 | ||
228 | left_ppas = line->cur_sec - r_ptr; | |
229 | if (!left_ppas) | |
230 | return 0; | |
231 | ||
232 | r_ptr_int = r_ptr; | |
233 | ||
234 | next_read_rq: | |
084ec9ba | 235 | memset(rqd, 0, pblk_g_rq_size); |
a4bd217b JG |
236 | |
237 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
238 | if (!rq_ppas) | |
239 | rq_ppas = pblk->min_write_pgs; | |
240 | rq_len = rq_ppas * geo->sec_size; | |
241 | ||
242 | bio = bio_map_kern(dev->q, data, rq_len, GFP_KERNEL); | |
243 | if (IS_ERR(bio)) | |
244 | return PTR_ERR(bio); | |
245 | ||
246 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
247 | bio_set_op_attrs(bio, REQ_OP_READ, 0); | |
248 | ||
249 | rqd->bio = bio; | |
250 | rqd->opcode = NVM_OP_PREAD; | |
a4bd217b JG |
251 | rqd->meta_list = meta_list; |
252 | rqd->nr_ppas = rq_ppas; | |
253 | rqd->ppa_list = ppa_list; | |
254 | rqd->dma_ppa_list = dma_ppa_list; | |
255 | rqd->dma_meta_list = dma_meta_list; | |
256 | rqd->end_io = pblk_end_io_sync; | |
257 | rqd->private = &wait; | |
258 | ||
f9c10152 JG |
259 | if (pblk_io_aligned(pblk, rq_ppas)) |
260 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL); | |
261 | else | |
262 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM); | |
263 | ||
a4bd217b JG |
264 | for (i = 0; i < rqd->nr_ppas; ) { |
265 | struct ppa_addr ppa; | |
266 | int pos; | |
267 | ||
268 | ppa = addr_to_gen_ppa(pblk, r_ptr_int, line->id); | |
269 | pos = pblk_dev_ppa_to_pos(geo, ppa); | |
270 | ||
271 | while (test_bit(pos, line->blk_bitmap)) { | |
272 | r_ptr_int += pblk->min_write_pgs; | |
273 | ppa = addr_to_gen_ppa(pblk, r_ptr_int, line->id); | |
274 | pos = pblk_dev_ppa_to_pos(geo, ppa); | |
275 | } | |
276 | ||
277 | for (j = 0; j < pblk->min_write_pgs; j++, i++, r_ptr_int++) | |
278 | rqd->ppa_list[i] = | |
279 | addr_to_gen_ppa(pblk, r_ptr_int, line->id); | |
280 | } | |
281 | ||
282 | /* If read fails, more padding is needed */ | |
283 | ret = pblk_submit_io(pblk, rqd); | |
284 | if (ret) { | |
285 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
286 | return ret; | |
287 | } | |
288 | ||
289 | if (!wait_for_completion_io_timeout(&wait, | |
290 | msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) { | |
291 | pr_err("pblk: L2P recovery read timed out\n"); | |
292 | return -EINTR; | |
293 | } | |
588726d3 | 294 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
295 | reinit_completion(&wait); |
296 | ||
297 | /* At this point, the read should not fail. If it does, it is a problem | |
298 | * we cannot recover from here. Need FTL log. | |
299 | */ | |
300 | if (rqd->error) { | |
301 | pr_err("pblk: L2P recovery failed (%d)\n", rqd->error); | |
302 | return -EINTR; | |
303 | } | |
304 | ||
305 | for (i = 0; i < rqd->nr_ppas; i++) { | |
306 | u64 lba = le64_to_cpu(meta_list[i].lba); | |
307 | ||
308 | if (lba == ADDR_EMPTY || lba > pblk->rl.nr_secs) | |
309 | continue; | |
310 | ||
311 | pblk_update_map(pblk, lba, rqd->ppa_list[i]); | |
312 | } | |
313 | ||
314 | left_ppas -= rq_ppas; | |
315 | if (left_ppas > 0) | |
316 | goto next_read_rq; | |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
ee8d5c1a JG |
321 | static void pblk_recov_complete(struct kref *ref) |
322 | { | |
323 | struct pblk_pad_rq *pad_rq = container_of(ref, struct pblk_pad_rq, ref); | |
324 | ||
325 | complete(&pad_rq->wait); | |
326 | } | |
327 | ||
328 | static void pblk_end_io_recov(struct nvm_rq *rqd) | |
329 | { | |
330 | struct pblk_pad_rq *pad_rq = rqd->private; | |
331 | struct pblk *pblk = pad_rq->pblk; | |
ee8d5c1a | 332 | |
3eaa11e2 JG |
333 | pblk_up_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
334 | ||
e2cddf20 | 335 | pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); |
3eaa11e2 JG |
336 | |
337 | atomic_dec(&pblk->inflight_io); | |
338 | kref_put(&pad_rq->ref, pblk_recov_complete); | |
ee8d5c1a JG |
339 | } |
340 | ||
a4bd217b | 341 | static int pblk_recov_pad_oob(struct pblk *pblk, struct pblk_line *line, |
ee8d5c1a | 342 | int left_ppas) |
a4bd217b JG |
343 | { |
344 | struct nvm_tgt_dev *dev = pblk->dev; | |
345 | struct nvm_geo *geo = &dev->geo; | |
346 | struct ppa_addr *ppa_list; | |
347 | struct pblk_sec_meta *meta_list; | |
ee8d5c1a | 348 | struct pblk_pad_rq *pad_rq; |
a4bd217b JG |
349 | struct nvm_rq *rqd; |
350 | struct bio *bio; | |
351 | void *data; | |
352 | dma_addr_t dma_ppa_list, dma_meta_list; | |
dd2a4343 | 353 | __le64 *lba_list = emeta_to_lbas(pblk, line->emeta->buf); |
a4bd217b | 354 | u64 w_ptr = line->cur_sec; |
ee8d5c1a | 355 | int left_line_ppas, rq_ppas, rq_len; |
a4bd217b JG |
356 | int i, j; |
357 | int ret = 0; | |
a4bd217b | 358 | |
ee8d5c1a JG |
359 | spin_lock(&line->lock); |
360 | left_line_ppas = line->left_msecs; | |
361 | spin_unlock(&line->lock); | |
362 | ||
363 | pad_rq = kmalloc(sizeof(struct pblk_pad_rq), GFP_KERNEL); | |
364 | if (!pad_rq) | |
365 | return -ENOMEM; | |
366 | ||
367 | data = vzalloc(pblk->max_write_pgs * geo->sec_size); | |
368 | if (!data) { | |
369 | ret = -ENOMEM; | |
370 | goto free_rq; | |
371 | } | |
372 | ||
373 | pad_rq->pblk = pblk; | |
374 | init_completion(&pad_rq->wait); | |
375 | kref_init(&pad_rq->ref); | |
a4bd217b JG |
376 | |
377 | next_pad_rq: | |
378 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
ee8d5c1a JG |
379 | if (rq_ppas < pblk->min_write_pgs) { |
380 | pr_err("pblk: corrupted pad line %d\n", line->id); | |
3eaa11e2 | 381 | goto fail_free_pad; |
ee8d5c1a JG |
382 | } |
383 | ||
a4bd217b JG |
384 | rq_len = rq_ppas * geo->sec_size; |
385 | ||
ee8d5c1a JG |
386 | meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, &dma_meta_list); |
387 | if (!meta_list) { | |
388 | ret = -ENOMEM; | |
3eaa11e2 | 389 | goto fail_free_pad; |
ee8d5c1a JG |
390 | } |
391 | ||
392 | ppa_list = (void *)(meta_list) + pblk_dma_meta_size; | |
393 | dma_ppa_list = dma_meta_list + pblk_dma_meta_size; | |
394 | ||
3eaa11e2 JG |
395 | bio = pblk_bio_map_addr(pblk, data, rq_ppas, rq_len, |
396 | PBLK_VMALLOC_META, GFP_KERNEL); | |
ee8d5c1a JG |
397 | if (IS_ERR(bio)) { |
398 | ret = PTR_ERR(bio); | |
2942f50f | 399 | goto fail_free_meta; |
ee8d5c1a | 400 | } |
a4bd217b JG |
401 | |
402 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
403 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); | |
404 | ||
e2cddf20 | 405 | rqd = pblk_alloc_rqd(pblk, PBLK_WRITE_INT); |
2942f50f | 406 | |
a4bd217b JG |
407 | rqd->bio = bio; |
408 | rqd->opcode = NVM_OP_PWRITE; | |
e2cddf20 | 409 | rqd->flags = pblk_set_progr_mode(pblk, PBLK_WRITE); |
a4bd217b JG |
410 | rqd->meta_list = meta_list; |
411 | rqd->nr_ppas = rq_ppas; | |
412 | rqd->ppa_list = ppa_list; | |
413 | rqd->dma_ppa_list = dma_ppa_list; | |
414 | rqd->dma_meta_list = dma_meta_list; | |
ee8d5c1a JG |
415 | rqd->end_io = pblk_end_io_recov; |
416 | rqd->private = pad_rq; | |
a4bd217b JG |
417 | |
418 | for (i = 0; i < rqd->nr_ppas; ) { | |
419 | struct ppa_addr ppa; | |
420 | int pos; | |
421 | ||
422 | w_ptr = pblk_alloc_page(pblk, line, pblk->min_write_pgs); | |
423 | ppa = addr_to_pblk_ppa(pblk, w_ptr, line->id); | |
424 | pos = pblk_ppa_to_pos(geo, ppa); | |
425 | ||
426 | while (test_bit(pos, line->blk_bitmap)) { | |
427 | w_ptr += pblk->min_write_pgs; | |
428 | ppa = addr_to_pblk_ppa(pblk, w_ptr, line->id); | |
429 | pos = pblk_ppa_to_pos(geo, ppa); | |
430 | } | |
431 | ||
432 | for (j = 0; j < pblk->min_write_pgs; j++, i++, w_ptr++) { | |
433 | struct ppa_addr dev_ppa; | |
f417aa0b | 434 | __le64 addr_empty = cpu_to_le64(ADDR_EMPTY); |
a4bd217b JG |
435 | |
436 | dev_ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); | |
437 | ||
438 | pblk_map_invalidate(pblk, dev_ppa); | |
caa69fa5 | 439 | lba_list[w_ptr] = meta_list[i].lba = addr_empty; |
a4bd217b JG |
440 | rqd->ppa_list[i] = dev_ppa; |
441 | } | |
442 | } | |
443 | ||
ee8d5c1a | 444 | kref_get(&pad_rq->ref); |
3eaa11e2 | 445 | pblk_down_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
ee8d5c1a | 446 | |
a4bd217b JG |
447 | ret = pblk_submit_io(pblk, rqd); |
448 | if (ret) { | |
449 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
3eaa11e2 JG |
450 | pblk_up_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
451 | goto fail_free_bio; | |
a4bd217b JG |
452 | } |
453 | ||
a4bd217b JG |
454 | left_line_ppas -= rq_ppas; |
455 | left_ppas -= rq_ppas; | |
ee8d5c1a | 456 | if (left_ppas && left_line_ppas) |
a4bd217b JG |
457 | goto next_pad_rq; |
458 | ||
ee8d5c1a JG |
459 | kref_put(&pad_rq->ref, pblk_recov_complete); |
460 | ||
461 | if (!wait_for_completion_io_timeout(&pad_rq->wait, | |
462 | msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) { | |
463 | pr_err("pblk: pad write timed out\n"); | |
464 | ret = -ETIME; | |
465 | } | |
466 | ||
3eaa11e2 JG |
467 | if (!pblk_line_is_full(line)) |
468 | pr_err("pblk: corrupted padded line: %d\n", line->id); | |
469 | ||
470 | vfree(data); | |
ee8d5c1a JG |
471 | free_rq: |
472 | kfree(pad_rq); | |
ee8d5c1a JG |
473 | return ret; |
474 | ||
3eaa11e2 JG |
475 | fail_free_bio: |
476 | bio_put(bio); | |
ee8d5c1a JG |
477 | fail_free_meta: |
478 | nvm_dev_dma_free(dev->parent, meta_list, dma_meta_list); | |
3eaa11e2 | 479 | fail_free_pad: |
ee8d5c1a | 480 | kfree(pad_rq); |
3eaa11e2 | 481 | vfree(data); |
ee8d5c1a | 482 | return ret; |
a4bd217b JG |
483 | } |
484 | ||
485 | /* When this function is called, it means that not all upper pages have been | |
486 | * written in a page that contains valid data. In order to recover this data, we | |
487 | * first find the write pointer on the device, then we pad all necessary | |
488 | * sectors, and finally attempt to read the valid data | |
489 | */ | |
490 | static int pblk_recov_scan_all_oob(struct pblk *pblk, struct pblk_line *line, | |
491 | struct pblk_recov_alloc p) | |
492 | { | |
493 | struct nvm_tgt_dev *dev = pblk->dev; | |
494 | struct nvm_geo *geo = &dev->geo; | |
495 | struct ppa_addr *ppa_list; | |
496 | struct pblk_sec_meta *meta_list; | |
497 | struct nvm_rq *rqd; | |
498 | struct bio *bio; | |
499 | void *data; | |
500 | dma_addr_t dma_ppa_list, dma_meta_list; | |
501 | u64 w_ptr = 0, r_ptr; | |
502 | int rq_ppas, rq_len; | |
503 | int i, j; | |
504 | int ret = 0; | |
505 | int rec_round; | |
506 | int left_ppas = pblk_calc_sec_in_line(pblk, line) - line->cur_sec; | |
507 | DECLARE_COMPLETION_ONSTACK(wait); | |
508 | ||
509 | ppa_list = p.ppa_list; | |
510 | meta_list = p.meta_list; | |
511 | rqd = p.rqd; | |
512 | data = p.data; | |
513 | dma_ppa_list = p.dma_ppa_list; | |
514 | dma_meta_list = p.dma_meta_list; | |
515 | ||
516 | /* we could recover up until the line write pointer */ | |
517 | r_ptr = line->cur_sec; | |
518 | rec_round = 0; | |
519 | ||
520 | next_rq: | |
084ec9ba | 521 | memset(rqd, 0, pblk_g_rq_size); |
a4bd217b JG |
522 | |
523 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
524 | if (!rq_ppas) | |
525 | rq_ppas = pblk->min_write_pgs; | |
526 | rq_len = rq_ppas * geo->sec_size; | |
527 | ||
528 | bio = bio_map_kern(dev->q, data, rq_len, GFP_KERNEL); | |
529 | if (IS_ERR(bio)) | |
530 | return PTR_ERR(bio); | |
531 | ||
532 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
533 | bio_set_op_attrs(bio, REQ_OP_READ, 0); | |
534 | ||
535 | rqd->bio = bio; | |
536 | rqd->opcode = NVM_OP_PREAD; | |
a4bd217b JG |
537 | rqd->meta_list = meta_list; |
538 | rqd->nr_ppas = rq_ppas; | |
539 | rqd->ppa_list = ppa_list; | |
540 | rqd->dma_ppa_list = dma_ppa_list; | |
541 | rqd->dma_meta_list = dma_meta_list; | |
542 | rqd->end_io = pblk_end_io_sync; | |
543 | rqd->private = &wait; | |
544 | ||
f9c10152 JG |
545 | if (pblk_io_aligned(pblk, rq_ppas)) |
546 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL); | |
547 | else | |
548 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM); | |
549 | ||
a4bd217b JG |
550 | for (i = 0; i < rqd->nr_ppas; ) { |
551 | struct ppa_addr ppa; | |
552 | int pos; | |
553 | ||
554 | w_ptr = pblk_alloc_page(pblk, line, pblk->min_write_pgs); | |
555 | ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); | |
556 | pos = pblk_dev_ppa_to_pos(geo, ppa); | |
557 | ||
558 | while (test_bit(pos, line->blk_bitmap)) { | |
559 | w_ptr += pblk->min_write_pgs; | |
560 | ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); | |
561 | pos = pblk_dev_ppa_to_pos(geo, ppa); | |
562 | } | |
563 | ||
564 | for (j = 0; j < pblk->min_write_pgs; j++, i++, w_ptr++) | |
565 | rqd->ppa_list[i] = | |
566 | addr_to_gen_ppa(pblk, w_ptr, line->id); | |
567 | } | |
568 | ||
569 | ret = pblk_submit_io(pblk, rqd); | |
570 | if (ret) { | |
571 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
572 | return ret; | |
573 | } | |
574 | ||
575 | if (!wait_for_completion_io_timeout(&wait, | |
576 | msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) { | |
577 | pr_err("pblk: L2P recovery read timed out\n"); | |
578 | } | |
588726d3 | 579 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
580 | reinit_completion(&wait); |
581 | ||
582 | /* This should not happen since the read failed during normal recovery, | |
583 | * but the media works funny sometimes... | |
584 | */ | |
585 | if (!rec_round++ && !rqd->error) { | |
586 | rec_round = 0; | |
587 | for (i = 0; i < rqd->nr_ppas; i++, r_ptr++) { | |
588 | u64 lba = le64_to_cpu(meta_list[i].lba); | |
589 | ||
590 | if (lba == ADDR_EMPTY || lba > pblk->rl.nr_secs) | |
591 | continue; | |
592 | ||
593 | pblk_update_map(pblk, lba, rqd->ppa_list[i]); | |
594 | } | |
595 | } | |
596 | ||
597 | /* Reached the end of the written line */ | |
598 | if (rqd->error == NVM_RSP_ERR_EMPTYPAGE) { | |
599 | int pad_secs, nr_error_bits, bit; | |
600 | int ret; | |
601 | ||
602 | bit = find_first_bit((void *)&rqd->ppa_status, rqd->nr_ppas); | |
603 | nr_error_bits = rqd->nr_ppas - bit; | |
604 | ||
605 | /* Roll back failed sectors */ | |
606 | line->cur_sec -= nr_error_bits; | |
607 | line->left_msecs += nr_error_bits; | |
608 | bitmap_clear(line->map_bitmap, line->cur_sec, nr_error_bits); | |
609 | ||
610 | pad_secs = pblk_pad_distance(pblk); | |
611 | if (pad_secs > line->left_msecs) | |
612 | pad_secs = line->left_msecs; | |
613 | ||
ee8d5c1a | 614 | ret = pblk_recov_pad_oob(pblk, line, pad_secs); |
a4bd217b JG |
615 | if (ret) |
616 | pr_err("pblk: OOB padding failed (err:%d)\n", ret); | |
617 | ||
618 | ret = pblk_recov_read_oob(pblk, line, p, r_ptr); | |
619 | if (ret) | |
620 | pr_err("pblk: OOB read failed (err:%d)\n", ret); | |
621 | ||
a4bd217b JG |
622 | left_ppas = 0; |
623 | } | |
624 | ||
625 | left_ppas -= rq_ppas; | |
626 | if (left_ppas > 0) | |
627 | goto next_rq; | |
628 | ||
629 | return ret; | |
630 | } | |
631 | ||
632 | static int pblk_recov_scan_oob(struct pblk *pblk, struct pblk_line *line, | |
633 | struct pblk_recov_alloc p, int *done) | |
634 | { | |
635 | struct nvm_tgt_dev *dev = pblk->dev; | |
636 | struct nvm_geo *geo = &dev->geo; | |
637 | struct ppa_addr *ppa_list; | |
638 | struct pblk_sec_meta *meta_list; | |
639 | struct nvm_rq *rqd; | |
640 | struct bio *bio; | |
641 | void *data; | |
642 | dma_addr_t dma_ppa_list, dma_meta_list; | |
643 | u64 paddr; | |
644 | int rq_ppas, rq_len; | |
645 | int i, j; | |
646 | int ret = 0; | |
647 | int left_ppas = pblk_calc_sec_in_line(pblk, line); | |
648 | DECLARE_COMPLETION_ONSTACK(wait); | |
649 | ||
650 | ppa_list = p.ppa_list; | |
651 | meta_list = p.meta_list; | |
652 | rqd = p.rqd; | |
653 | data = p.data; | |
654 | dma_ppa_list = p.dma_ppa_list; | |
655 | dma_meta_list = p.dma_meta_list; | |
656 | ||
657 | *done = 1; | |
658 | ||
659 | next_rq: | |
084ec9ba | 660 | memset(rqd, 0, pblk_g_rq_size); |
a4bd217b JG |
661 | |
662 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
663 | if (!rq_ppas) | |
664 | rq_ppas = pblk->min_write_pgs; | |
665 | rq_len = rq_ppas * geo->sec_size; | |
666 | ||
667 | bio = bio_map_kern(dev->q, data, rq_len, GFP_KERNEL); | |
668 | if (IS_ERR(bio)) | |
669 | return PTR_ERR(bio); | |
670 | ||
671 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
672 | bio_set_op_attrs(bio, REQ_OP_READ, 0); | |
673 | ||
674 | rqd->bio = bio; | |
675 | rqd->opcode = NVM_OP_PREAD; | |
a4bd217b JG |
676 | rqd->meta_list = meta_list; |
677 | rqd->nr_ppas = rq_ppas; | |
678 | rqd->ppa_list = ppa_list; | |
679 | rqd->dma_ppa_list = dma_ppa_list; | |
680 | rqd->dma_meta_list = dma_meta_list; | |
681 | rqd->end_io = pblk_end_io_sync; | |
682 | rqd->private = &wait; | |
683 | ||
f9c10152 JG |
684 | if (pblk_io_aligned(pblk, rq_ppas)) |
685 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL); | |
686 | else | |
687 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM); | |
688 | ||
a4bd217b JG |
689 | for (i = 0; i < rqd->nr_ppas; ) { |
690 | struct ppa_addr ppa; | |
691 | int pos; | |
692 | ||
693 | paddr = pblk_alloc_page(pblk, line, pblk->min_write_pgs); | |
694 | ppa = addr_to_gen_ppa(pblk, paddr, line->id); | |
695 | pos = pblk_dev_ppa_to_pos(geo, ppa); | |
696 | ||
697 | while (test_bit(pos, line->blk_bitmap)) { | |
698 | paddr += pblk->min_write_pgs; | |
699 | ppa = addr_to_gen_ppa(pblk, paddr, line->id); | |
700 | pos = pblk_dev_ppa_to_pos(geo, ppa); | |
701 | } | |
702 | ||
703 | for (j = 0; j < pblk->min_write_pgs; j++, i++, paddr++) | |
704 | rqd->ppa_list[i] = | |
705 | addr_to_gen_ppa(pblk, paddr, line->id); | |
706 | } | |
707 | ||
708 | ret = pblk_submit_io(pblk, rqd); | |
709 | if (ret) { | |
710 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
711 | bio_put(bio); | |
712 | return ret; | |
713 | } | |
714 | ||
715 | if (!wait_for_completion_io_timeout(&wait, | |
716 | msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) { | |
717 | pr_err("pblk: L2P recovery read timed out\n"); | |
718 | } | |
588726d3 | 719 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
720 | reinit_completion(&wait); |
721 | ||
722 | /* Reached the end of the written line */ | |
723 | if (rqd->error) { | |
724 | int nr_error_bits, bit; | |
725 | ||
726 | bit = find_first_bit((void *)&rqd->ppa_status, rqd->nr_ppas); | |
727 | nr_error_bits = rqd->nr_ppas - bit; | |
728 | ||
729 | /* Roll back failed sectors */ | |
730 | line->cur_sec -= nr_error_bits; | |
731 | line->left_msecs += nr_error_bits; | |
a4bd217b JG |
732 | bitmap_clear(line->map_bitmap, line->cur_sec, nr_error_bits); |
733 | ||
734 | left_ppas = 0; | |
735 | rqd->nr_ppas = bit; | |
736 | ||
737 | if (rqd->error != NVM_RSP_ERR_EMPTYPAGE) | |
738 | *done = 0; | |
739 | } | |
740 | ||
741 | for (i = 0; i < rqd->nr_ppas; i++) { | |
742 | u64 lba = le64_to_cpu(meta_list[i].lba); | |
743 | ||
744 | if (lba == ADDR_EMPTY || lba > pblk->rl.nr_secs) | |
745 | continue; | |
746 | ||
747 | pblk_update_map(pblk, lba, rqd->ppa_list[i]); | |
748 | } | |
749 | ||
750 | left_ppas -= rq_ppas; | |
751 | if (left_ppas > 0) | |
752 | goto next_rq; | |
753 | ||
754 | return ret; | |
755 | } | |
756 | ||
757 | /* Scan line for lbas on out of bound area */ | |
758 | static int pblk_recov_l2p_from_oob(struct pblk *pblk, struct pblk_line *line) | |
759 | { | |
760 | struct nvm_tgt_dev *dev = pblk->dev; | |
761 | struct nvm_geo *geo = &dev->geo; | |
762 | struct nvm_rq *rqd; | |
763 | struct ppa_addr *ppa_list; | |
764 | struct pblk_sec_meta *meta_list; | |
765 | struct pblk_recov_alloc p; | |
766 | void *data; | |
767 | dma_addr_t dma_ppa_list, dma_meta_list; | |
768 | int done, ret = 0; | |
769 | ||
a4bd217b | 770 | meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, &dma_meta_list); |
2942f50f JG |
771 | if (!meta_list) |
772 | return -ENOMEM; | |
a4bd217b JG |
773 | |
774 | ppa_list = (void *)(meta_list) + pblk_dma_meta_size; | |
775 | dma_ppa_list = dma_meta_list + pblk_dma_meta_size; | |
776 | ||
777 | data = kcalloc(pblk->max_write_pgs, geo->sec_size, GFP_KERNEL); | |
778 | if (!data) { | |
779 | ret = -ENOMEM; | |
780 | goto free_meta_list; | |
781 | } | |
782 | ||
e2cddf20 | 783 | rqd = pblk_alloc_rqd(pblk, PBLK_READ); |
2942f50f | 784 | |
a4bd217b JG |
785 | p.ppa_list = ppa_list; |
786 | p.meta_list = meta_list; | |
787 | p.rqd = rqd; | |
788 | p.data = data; | |
789 | p.dma_ppa_list = dma_ppa_list; | |
790 | p.dma_meta_list = dma_meta_list; | |
791 | ||
792 | ret = pblk_recov_scan_oob(pblk, line, p, &done); | |
793 | if (ret) { | |
794 | pr_err("pblk: could not recover L2P from OOB\n"); | |
795 | goto out; | |
796 | } | |
797 | ||
798 | if (!done) { | |
799 | ret = pblk_recov_scan_all_oob(pblk, line, p); | |
800 | if (ret) { | |
801 | pr_err("pblk: could not recover L2P from OOB\n"); | |
802 | goto out; | |
803 | } | |
804 | } | |
805 | ||
806 | if (pblk_line_is_full(line)) | |
807 | pblk_line_recov_close(pblk, line); | |
808 | ||
809 | out: | |
810 | kfree(data); | |
811 | free_meta_list: | |
812 | nvm_dev_dma_free(dev->parent, meta_list, dma_meta_list); | |
a4bd217b JG |
813 | |
814 | return ret; | |
815 | } | |
816 | ||
817 | /* Insert lines ordered by sequence number (seq_num) on list */ | |
818 | static void pblk_recov_line_add_ordered(struct list_head *head, | |
819 | struct pblk_line *line) | |
820 | { | |
821 | struct pblk_line *t = NULL; | |
822 | ||
823 | list_for_each_entry(t, head, list) | |
824 | if (t->seq_nr > line->seq_nr) | |
825 | break; | |
826 | ||
827 | __list_add(&line->list, t->list.prev, &t->list); | |
828 | } | |
829 | ||
830 | struct pblk_line *pblk_recov_l2p(struct pblk *pblk) | |
831 | { | |
832 | struct nvm_tgt_dev *dev = pblk->dev; | |
833 | struct nvm_geo *geo = &dev->geo; | |
834 | struct pblk_line_meta *lm = &pblk->lm; | |
835 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
836 | struct pblk_line *line, *tline, *data_line = NULL; | |
dd2a4343 JG |
837 | struct pblk_smeta *smeta; |
838 | struct pblk_emeta *emeta; | |
839 | struct line_smeta *smeta_buf; | |
a4bd217b JG |
840 | int found_lines = 0, recovered_lines = 0, open_lines = 0; |
841 | int is_next = 0; | |
842 | int meta_line; | |
843 | int i, valid_uuid = 0; | |
844 | LIST_HEAD(recov_list); | |
845 | ||
846 | /* TODO: Implement FTL snapshot */ | |
847 | ||
848 | /* Scan recovery - takes place when FTL snapshot fails */ | |
849 | spin_lock(&l_mg->free_lock); | |
850 | meta_line = find_first_zero_bit(&l_mg->meta_bitmap, PBLK_DATA_LINES); | |
851 | set_bit(meta_line, &l_mg->meta_bitmap); | |
dd2a4343 JG |
852 | smeta = l_mg->sline_meta[meta_line]; |
853 | emeta = l_mg->eline_meta[meta_line]; | |
8224cbd8 | 854 | smeta_buf = (struct line_smeta *)smeta; |
a4bd217b JG |
855 | spin_unlock(&l_mg->free_lock); |
856 | ||
857 | /* Order data lines using their sequence number */ | |
858 | for (i = 0; i < l_mg->nr_lines; i++) { | |
859 | u32 crc; | |
860 | ||
861 | line = &pblk->lines[i]; | |
862 | ||
863 | memset(smeta, 0, lm->smeta_len); | |
864 | line->smeta = smeta; | |
dd2a4343 | 865 | line->lun_bitmap = ((void *)(smeta_buf)) + |
a4bd217b JG |
866 | sizeof(struct line_smeta); |
867 | ||
868 | /* Lines that cannot be read are assumed as not written here */ | |
869 | if (pblk_line_read_smeta(pblk, line)) | |
870 | continue; | |
871 | ||
dd2a4343 JG |
872 | crc = pblk_calc_smeta_crc(pblk, smeta_buf); |
873 | if (le32_to_cpu(smeta_buf->crc) != crc) | |
a4bd217b JG |
874 | continue; |
875 | ||
dd2a4343 | 876 | if (le32_to_cpu(smeta_buf->header.identifier) != PBLK_MAGIC) |
a4bd217b JG |
877 | continue; |
878 | ||
c79819bc | 879 | if (smeta_buf->header.version != SMETA_VERSION) { |
a4bd217b | 880 | pr_err("pblk: found incompatible line version %u\n", |
c79819bc | 881 | le16_to_cpu(smeta_buf->header.version)); |
a4bd217b JG |
882 | return ERR_PTR(-EINVAL); |
883 | } | |
884 | ||
885 | /* The first valid instance uuid is used for initialization */ | |
886 | if (!valid_uuid) { | |
dd2a4343 | 887 | memcpy(pblk->instance_uuid, smeta_buf->header.uuid, 16); |
a4bd217b JG |
888 | valid_uuid = 1; |
889 | } | |
890 | ||
dd2a4343 | 891 | if (memcmp(pblk->instance_uuid, smeta_buf->header.uuid, 16)) { |
a4bd217b JG |
892 | pr_debug("pblk: ignore line %u due to uuid mismatch\n", |
893 | i); | |
894 | continue; | |
895 | } | |
896 | ||
897 | /* Update line metadata */ | |
898 | spin_lock(&line->lock); | |
dd2a4343 JG |
899 | line->id = le32_to_cpu(smeta_buf->header.id); |
900 | line->type = le16_to_cpu(smeta_buf->header.type); | |
901 | line->seq_nr = le64_to_cpu(smeta_buf->seq_nr); | |
a4bd217b JG |
902 | spin_unlock(&line->lock); |
903 | ||
904 | /* Update general metadata */ | |
905 | spin_lock(&l_mg->free_lock); | |
906 | if (line->seq_nr >= l_mg->d_seq_nr) | |
907 | l_mg->d_seq_nr = line->seq_nr + 1; | |
908 | l_mg->nr_free_lines--; | |
909 | spin_unlock(&l_mg->free_lock); | |
910 | ||
911 | if (pblk_line_recov_alloc(pblk, line)) | |
912 | goto out; | |
913 | ||
914 | pblk_recov_line_add_ordered(&recov_list, line); | |
915 | found_lines++; | |
916 | pr_debug("pblk: recovering data line %d, seq:%llu\n", | |
dd2a4343 | 917 | line->id, smeta_buf->seq_nr); |
a4bd217b JG |
918 | } |
919 | ||
920 | if (!found_lines) { | |
921 | pblk_setup_uuid(pblk); | |
922 | ||
923 | spin_lock(&l_mg->free_lock); | |
924 | WARN_ON_ONCE(!test_and_clear_bit(meta_line, | |
925 | &l_mg->meta_bitmap)); | |
926 | spin_unlock(&l_mg->free_lock); | |
927 | ||
928 | goto out; | |
929 | } | |
930 | ||
931 | /* Verify closed blocks and recover this portion of L2P table*/ | |
932 | list_for_each_entry_safe(line, tline, &recov_list, list) { | |
933 | int off, nr_bb; | |
934 | ||
935 | recovered_lines++; | |
936 | /* Calculate where emeta starts based on the line bb */ | |
dd2a4343 | 937 | off = lm->sec_per_line - lm->emeta_sec[0]; |
a4bd217b JG |
938 | nr_bb = bitmap_weight(line->blk_bitmap, lm->blk_per_line); |
939 | off -= nr_bb * geo->sec_per_pl; | |
940 | ||
a4bd217b | 941 | line->emeta_ssec = off; |
8224cbd8 JG |
942 | line->emeta = emeta; |
943 | memset(line->emeta->buf, 0, lm->emeta_len[0]); | |
a4bd217b | 944 | |
dd2a4343 | 945 | if (pblk_line_read_emeta(pblk, line, line->emeta->buf)) { |
a4bd217b JG |
946 | pblk_recov_l2p_from_oob(pblk, line); |
947 | goto next; | |
948 | } | |
949 | ||
950 | if (pblk_recov_l2p_from_emeta(pblk, line)) | |
951 | pblk_recov_l2p_from_oob(pblk, line); | |
952 | ||
953 | next: | |
954 | if (pblk_line_is_full(line)) { | |
955 | struct list_head *move_list; | |
956 | ||
957 | spin_lock(&line->lock); | |
958 | line->state = PBLK_LINESTATE_CLOSED; | |
959 | move_list = pblk_line_gc_list(pblk, line); | |
960 | spin_unlock(&line->lock); | |
961 | ||
962 | spin_lock(&l_mg->gc_lock); | |
963 | list_move_tail(&line->list, move_list); | |
964 | spin_unlock(&l_mg->gc_lock); | |
965 | ||
e72ec1d3 | 966 | kfree(line->map_bitmap); |
a4bd217b JG |
967 | line->map_bitmap = NULL; |
968 | line->smeta = NULL; | |
969 | line->emeta = NULL; | |
970 | } else { | |
971 | if (open_lines > 1) | |
972 | pr_err("pblk: failed to recover L2P\n"); | |
973 | ||
974 | open_lines++; | |
975 | line->meta_line = meta_line; | |
976 | data_line = line; | |
977 | } | |
978 | } | |
979 | ||
980 | spin_lock(&l_mg->free_lock); | |
981 | if (!open_lines) { | |
982 | WARN_ON_ONCE(!test_and_clear_bit(meta_line, | |
983 | &l_mg->meta_bitmap)); | |
984 | pblk_line_replace_data(pblk); | |
985 | } else { | |
986 | /* Allocate next line for preparation */ | |
987 | l_mg->data_next = pblk_line_get(pblk); | |
988 | if (l_mg->data_next) { | |
989 | l_mg->data_next->seq_nr = l_mg->d_seq_nr++; | |
990 | l_mg->data_next->type = PBLK_LINETYPE_DATA; | |
991 | is_next = 1; | |
992 | } | |
993 | } | |
994 | spin_unlock(&l_mg->free_lock); | |
995 | ||
996 | if (is_next) { | |
997 | pblk_line_erase(pblk, l_mg->data_next); | |
998 | pblk_rl_free_lines_dec(&pblk->rl, l_mg->data_next); | |
999 | } | |
1000 | ||
1001 | out: | |
1002 | if (found_lines != recovered_lines) | |
1003 | pr_err("pblk: failed to recover all found lines %d/%d\n", | |
1004 | found_lines, recovered_lines); | |
1005 | ||
1006 | return data_line; | |
1007 | } | |
1008 | ||
1009 | /* | |
588726d3 | 1010 | * Pad current line |
a4bd217b | 1011 | */ |
588726d3 | 1012 | int pblk_recov_pad(struct pblk *pblk) |
a4bd217b | 1013 | { |
a4bd217b JG |
1014 | struct pblk_line *line; |
1015 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
588726d3 JG |
1016 | int left_msecs; |
1017 | int ret = 0; | |
a4bd217b JG |
1018 | |
1019 | spin_lock(&l_mg->free_lock); | |
1020 | line = l_mg->data_line; | |
588726d3 | 1021 | left_msecs = line->left_msecs; |
a4bd217b JG |
1022 | spin_unlock(&l_mg->free_lock); |
1023 | ||
ee8d5c1a | 1024 | ret = pblk_recov_pad_oob(pblk, line, left_msecs); |
588726d3 JG |
1025 | if (ret) { |
1026 | pr_err("pblk: Tear down padding failed (%d)\n", ret); | |
ee8d5c1a | 1027 | return ret; |
a4bd217b JG |
1028 | } |
1029 | ||
588726d3 | 1030 | pblk_line_close_meta(pblk, line); |
588726d3 | 1031 | return ret; |
a4bd217b | 1032 | } |