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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); | |
37 | if (!bio) { | |
38 | pr_err("pblk: not able to create recovery bio\n"); | |
39 | return; | |
40 | } | |
41 | ||
42 | bio->bi_iter.bi_sector = 0; | |
43 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); | |
44 | rqd->bio = bio; | |
45 | rqd->nr_ppas = nr_rec_secs; | |
46 | ||
47 | pgs_read = pblk_rb_read_to_bio_list(&pblk->rwb, bio, &recovery->failed, | |
48 | nr_rec_secs); | |
49 | if (pgs_read != nr_rec_secs) { | |
50 | pr_err("pblk: could not read recovery entries\n"); | |
51 | goto err; | |
52 | } | |
53 | ||
54 | if (pblk_setup_w_rec_rq(pblk, rqd, c_ctx)) { | |
55 | pr_err("pblk: could not setup recovery request\n"); | |
56 | goto err; | |
57 | } | |
58 | ||
59 | #ifdef CONFIG_NVM_DEBUG | |
60 | atomic_long_add(nr_rec_secs, &pblk->recov_writes); | |
61 | #endif | |
62 | ||
63 | ret = pblk_submit_io(pblk, rqd); | |
64 | if (ret) { | |
65 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
66 | goto err; | |
67 | } | |
68 | ||
69 | mempool_free(recovery, pblk->rec_pool); | |
70 | return; | |
71 | ||
72 | err: | |
73 | bio_put(bio); | |
74 | pblk_free_rqd(pblk, rqd, WRITE); | |
75 | } | |
76 | ||
77 | int pblk_recov_setup_rq(struct pblk *pblk, struct pblk_c_ctx *c_ctx, | |
78 | struct pblk_rec_ctx *recovery, u64 *comp_bits, | |
79 | unsigned int comp) | |
80 | { | |
81 | struct nvm_tgt_dev *dev = pblk->dev; | |
82 | int max_secs = nvm_max_phys_sects(dev); | |
83 | struct nvm_rq *rec_rqd; | |
84 | struct pblk_c_ctx *rec_ctx; | |
85 | int nr_entries = c_ctx->nr_valid + c_ctx->nr_padded; | |
86 | ||
87 | rec_rqd = pblk_alloc_rqd(pblk, WRITE); | |
88 | if (IS_ERR(rec_rqd)) { | |
89 | pr_err("pblk: could not create recovery req.\n"); | |
90 | return -ENOMEM; | |
91 | } | |
92 | ||
93 | rec_ctx = nvm_rq_to_pdu(rec_rqd); | |
94 | ||
95 | /* Copy completion bitmap, but exclude the first X completed entries */ | |
96 | bitmap_shift_right((unsigned long int *)&rec_rqd->ppa_status, | |
97 | (unsigned long int *)comp_bits, | |
98 | comp, max_secs); | |
99 | ||
100 | /* Save the context for the entries that need to be re-written and | |
101 | * update current context with the completed entries. | |
102 | */ | |
103 | rec_ctx->sentry = pblk_rb_wrap_pos(&pblk->rwb, c_ctx->sentry + comp); | |
104 | if (comp >= c_ctx->nr_valid) { | |
105 | rec_ctx->nr_valid = 0; | |
106 | rec_ctx->nr_padded = nr_entries - comp; | |
107 | ||
108 | c_ctx->nr_padded = comp - c_ctx->nr_valid; | |
109 | } else { | |
110 | rec_ctx->nr_valid = c_ctx->nr_valid - comp; | |
111 | rec_ctx->nr_padded = c_ctx->nr_padded; | |
112 | ||
113 | c_ctx->nr_valid = comp; | |
114 | c_ctx->nr_padded = 0; | |
115 | } | |
116 | ||
117 | recovery->rqd = rec_rqd; | |
118 | recovery->pblk = pblk; | |
119 | ||
120 | return 0; | |
121 | } | |
122 | ||
dd2a4343 | 123 | __le64 *pblk_recov_get_lba_list(struct pblk *pblk, struct line_emeta *emeta_buf) |
a4bd217b JG |
124 | { |
125 | u32 crc; | |
126 | ||
dd2a4343 JG |
127 | crc = pblk_calc_emeta_crc(pblk, emeta_buf); |
128 | if (le32_to_cpu(emeta_buf->crc) != crc) | |
a4bd217b JG |
129 | return NULL; |
130 | ||
dd2a4343 | 131 | if (le32_to_cpu(emeta_buf->header.identifier) != PBLK_MAGIC) |
a4bd217b JG |
132 | return NULL; |
133 | ||
dd2a4343 | 134 | return emeta_to_lbas(pblk, emeta_buf); |
a4bd217b JG |
135 | } |
136 | ||
137 | static int pblk_recov_l2p_from_emeta(struct pblk *pblk, struct pblk_line *line) | |
138 | { | |
139 | struct nvm_tgt_dev *dev = pblk->dev; | |
140 | struct nvm_geo *geo = &dev->geo; | |
141 | struct pblk_line_meta *lm = &pblk->lm; | |
dd2a4343 JG |
142 | struct pblk_emeta *emeta = line->emeta; |
143 | struct line_emeta *emeta_buf = emeta->buf; | |
a4bd217b JG |
144 | __le64 *lba_list; |
145 | int data_start; | |
146 | int nr_data_lbas, nr_valid_lbas, nr_lbas = 0; | |
147 | int i; | |
148 | ||
dd2a4343 | 149 | lba_list = pblk_recov_get_lba_list(pblk, emeta_buf); |
a4bd217b JG |
150 | if (!lba_list) |
151 | return 1; | |
152 | ||
153 | data_start = pblk_line_smeta_start(pblk, line) + lm->smeta_sec; | |
dd2a4343 JG |
154 | nr_data_lbas = lm->sec_per_line - lm->emeta_sec[0]; |
155 | nr_valid_lbas = le64_to_cpu(emeta_buf->nr_valid_lbas); | |
a4bd217b JG |
156 | |
157 | for (i = data_start; i < nr_data_lbas && nr_lbas < nr_valid_lbas; i++) { | |
158 | struct ppa_addr ppa; | |
159 | int pos; | |
160 | ||
161 | ppa = addr_to_pblk_ppa(pblk, i, line->id); | |
162 | pos = pblk_ppa_to_pos(geo, ppa); | |
163 | ||
164 | /* Do not update bad blocks */ | |
165 | if (test_bit(pos, line->blk_bitmap)) | |
166 | continue; | |
167 | ||
168 | if (le64_to_cpu(lba_list[i]) == ADDR_EMPTY) { | |
169 | spin_lock(&line->lock); | |
170 | if (test_and_set_bit(i, line->invalid_bitmap)) | |
2a79efd8 | 171 | WARN_ONCE(1, "pblk: rec. double invalidate:\n"); |
a4bd217b | 172 | else |
dd2a4343 | 173 | le32_add_cpu(line->vsc, -1); |
a4bd217b JG |
174 | spin_unlock(&line->lock); |
175 | ||
176 | continue; | |
177 | } | |
178 | ||
179 | pblk_update_map(pblk, le64_to_cpu(lba_list[i]), ppa); | |
180 | nr_lbas++; | |
181 | } | |
182 | ||
183 | if (nr_valid_lbas != nr_lbas) | |
184 | pr_err("pblk: line %d - inconsistent lba list(%llu/%d)\n", | |
dd2a4343 | 185 | line->id, emeta_buf->nr_valid_lbas, nr_lbas); |
a4bd217b JG |
186 | |
187 | line->left_msecs = 0; | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | static int pblk_calc_sec_in_line(struct pblk *pblk, struct pblk_line *line) | |
193 | { | |
194 | struct nvm_tgt_dev *dev = pblk->dev; | |
195 | struct nvm_geo *geo = &dev->geo; | |
196 | struct pblk_line_meta *lm = &pblk->lm; | |
197 | int nr_bb = bitmap_weight(line->blk_bitmap, lm->blk_per_line); | |
198 | ||
dd2a4343 | 199 | return lm->sec_per_line - lm->smeta_sec - lm->emeta_sec[0] - |
a4bd217b JG |
200 | nr_bb * geo->sec_per_blk; |
201 | } | |
202 | ||
203 | struct pblk_recov_alloc { | |
204 | struct ppa_addr *ppa_list; | |
205 | struct pblk_sec_meta *meta_list; | |
206 | struct nvm_rq *rqd; | |
207 | void *data; | |
208 | dma_addr_t dma_ppa_list; | |
209 | dma_addr_t dma_meta_list; | |
210 | }; | |
211 | ||
212 | static int pblk_recov_read_oob(struct pblk *pblk, struct pblk_line *line, | |
213 | struct pblk_recov_alloc p, u64 r_ptr) | |
214 | { | |
215 | struct nvm_tgt_dev *dev = pblk->dev; | |
216 | struct nvm_geo *geo = &dev->geo; | |
217 | struct ppa_addr *ppa_list; | |
218 | struct pblk_sec_meta *meta_list; | |
219 | struct nvm_rq *rqd; | |
220 | struct bio *bio; | |
221 | void *data; | |
222 | dma_addr_t dma_ppa_list, dma_meta_list; | |
223 | u64 r_ptr_int; | |
224 | int left_ppas; | |
225 | int rq_ppas, rq_len; | |
226 | int i, j; | |
227 | int ret = 0; | |
228 | DECLARE_COMPLETION_ONSTACK(wait); | |
229 | ||
230 | ppa_list = p.ppa_list; | |
231 | meta_list = p.meta_list; | |
232 | rqd = p.rqd; | |
233 | data = p.data; | |
234 | dma_ppa_list = p.dma_ppa_list; | |
235 | dma_meta_list = p.dma_meta_list; | |
236 | ||
237 | left_ppas = line->cur_sec - r_ptr; | |
238 | if (!left_ppas) | |
239 | return 0; | |
240 | ||
241 | r_ptr_int = r_ptr; | |
242 | ||
243 | next_read_rq: | |
084ec9ba | 244 | memset(rqd, 0, pblk_g_rq_size); |
a4bd217b JG |
245 | |
246 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
247 | if (!rq_ppas) | |
248 | rq_ppas = pblk->min_write_pgs; | |
249 | rq_len = rq_ppas * geo->sec_size; | |
250 | ||
251 | bio = bio_map_kern(dev->q, data, rq_len, GFP_KERNEL); | |
252 | if (IS_ERR(bio)) | |
253 | return PTR_ERR(bio); | |
254 | ||
255 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
256 | bio_set_op_attrs(bio, REQ_OP_READ, 0); | |
257 | ||
258 | rqd->bio = bio; | |
259 | rqd->opcode = NVM_OP_PREAD; | |
a4bd217b JG |
260 | rqd->meta_list = meta_list; |
261 | rqd->nr_ppas = rq_ppas; | |
262 | rqd->ppa_list = ppa_list; | |
263 | rqd->dma_ppa_list = dma_ppa_list; | |
264 | rqd->dma_meta_list = dma_meta_list; | |
265 | rqd->end_io = pblk_end_io_sync; | |
266 | rqd->private = &wait; | |
267 | ||
f9c10152 JG |
268 | if (pblk_io_aligned(pblk, rq_ppas)) |
269 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL); | |
270 | else | |
271 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM); | |
272 | ||
a4bd217b JG |
273 | for (i = 0; i < rqd->nr_ppas; ) { |
274 | struct ppa_addr ppa; | |
275 | int pos; | |
276 | ||
277 | ppa = addr_to_gen_ppa(pblk, r_ptr_int, line->id); | |
278 | pos = pblk_dev_ppa_to_pos(geo, ppa); | |
279 | ||
280 | while (test_bit(pos, line->blk_bitmap)) { | |
281 | r_ptr_int += pblk->min_write_pgs; | |
282 | ppa = addr_to_gen_ppa(pblk, r_ptr_int, line->id); | |
283 | pos = pblk_dev_ppa_to_pos(geo, ppa); | |
284 | } | |
285 | ||
286 | for (j = 0; j < pblk->min_write_pgs; j++, i++, r_ptr_int++) | |
287 | rqd->ppa_list[i] = | |
288 | addr_to_gen_ppa(pblk, r_ptr_int, line->id); | |
289 | } | |
290 | ||
291 | /* If read fails, more padding is needed */ | |
292 | ret = pblk_submit_io(pblk, rqd); | |
293 | if (ret) { | |
294 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
295 | return ret; | |
296 | } | |
297 | ||
298 | if (!wait_for_completion_io_timeout(&wait, | |
299 | msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) { | |
300 | pr_err("pblk: L2P recovery read timed out\n"); | |
301 | return -EINTR; | |
302 | } | |
588726d3 | 303 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
304 | reinit_completion(&wait); |
305 | ||
306 | /* At this point, the read should not fail. If it does, it is a problem | |
307 | * we cannot recover from here. Need FTL log. | |
308 | */ | |
309 | if (rqd->error) { | |
310 | pr_err("pblk: L2P recovery failed (%d)\n", rqd->error); | |
311 | return -EINTR; | |
312 | } | |
313 | ||
314 | for (i = 0; i < rqd->nr_ppas; i++) { | |
315 | u64 lba = le64_to_cpu(meta_list[i].lba); | |
316 | ||
317 | if (lba == ADDR_EMPTY || lba > pblk->rl.nr_secs) | |
318 | continue; | |
319 | ||
320 | pblk_update_map(pblk, lba, rqd->ppa_list[i]); | |
321 | } | |
322 | ||
323 | left_ppas -= rq_ppas; | |
324 | if (left_ppas > 0) | |
325 | goto next_read_rq; | |
326 | ||
327 | return 0; | |
328 | } | |
329 | ||
ee8d5c1a JG |
330 | static void pblk_recov_complete(struct kref *ref) |
331 | { | |
332 | struct pblk_pad_rq *pad_rq = container_of(ref, struct pblk_pad_rq, ref); | |
333 | ||
334 | complete(&pad_rq->wait); | |
335 | } | |
336 | ||
337 | static void pblk_end_io_recov(struct nvm_rq *rqd) | |
338 | { | |
339 | struct pblk_pad_rq *pad_rq = rqd->private; | |
340 | struct pblk *pblk = pad_rq->pblk; | |
341 | struct nvm_tgt_dev *dev = pblk->dev; | |
342 | ||
3eaa11e2 JG |
343 | pblk_up_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
344 | ||
345 | bio_put(rqd->bio); | |
ee8d5c1a JG |
346 | nvm_dev_dma_free(dev->parent, rqd->meta_list, rqd->dma_meta_list); |
347 | pblk_free_rqd(pblk, rqd, WRITE); | |
3eaa11e2 JG |
348 | |
349 | atomic_dec(&pblk->inflight_io); | |
350 | kref_put(&pad_rq->ref, pblk_recov_complete); | |
ee8d5c1a JG |
351 | } |
352 | ||
a4bd217b | 353 | static int pblk_recov_pad_oob(struct pblk *pblk, struct pblk_line *line, |
ee8d5c1a | 354 | int left_ppas) |
a4bd217b JG |
355 | { |
356 | struct nvm_tgt_dev *dev = pblk->dev; | |
357 | struct nvm_geo *geo = &dev->geo; | |
358 | struct ppa_addr *ppa_list; | |
359 | struct pblk_sec_meta *meta_list; | |
ee8d5c1a | 360 | struct pblk_pad_rq *pad_rq; |
a4bd217b JG |
361 | struct nvm_rq *rqd; |
362 | struct bio *bio; | |
363 | void *data; | |
364 | dma_addr_t dma_ppa_list, dma_meta_list; | |
dd2a4343 | 365 | __le64 *lba_list = emeta_to_lbas(pblk, line->emeta->buf); |
a4bd217b | 366 | u64 w_ptr = line->cur_sec; |
ee8d5c1a | 367 | int left_line_ppas, rq_ppas, rq_len; |
a4bd217b JG |
368 | int i, j; |
369 | int ret = 0; | |
a4bd217b | 370 | |
ee8d5c1a JG |
371 | spin_lock(&line->lock); |
372 | left_line_ppas = line->left_msecs; | |
373 | spin_unlock(&line->lock); | |
374 | ||
375 | pad_rq = kmalloc(sizeof(struct pblk_pad_rq), GFP_KERNEL); | |
376 | if (!pad_rq) | |
377 | return -ENOMEM; | |
378 | ||
379 | data = vzalloc(pblk->max_write_pgs * geo->sec_size); | |
380 | if (!data) { | |
381 | ret = -ENOMEM; | |
382 | goto free_rq; | |
383 | } | |
384 | ||
385 | pad_rq->pblk = pblk; | |
386 | init_completion(&pad_rq->wait); | |
387 | kref_init(&pad_rq->ref); | |
a4bd217b JG |
388 | |
389 | next_pad_rq: | |
390 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
ee8d5c1a JG |
391 | if (rq_ppas < pblk->min_write_pgs) { |
392 | pr_err("pblk: corrupted pad line %d\n", line->id); | |
3eaa11e2 | 393 | goto fail_free_pad; |
ee8d5c1a JG |
394 | } |
395 | ||
a4bd217b JG |
396 | rq_len = rq_ppas * geo->sec_size; |
397 | ||
ee8d5c1a JG |
398 | meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, &dma_meta_list); |
399 | if (!meta_list) { | |
400 | ret = -ENOMEM; | |
3eaa11e2 | 401 | goto fail_free_pad; |
ee8d5c1a JG |
402 | } |
403 | ||
404 | ppa_list = (void *)(meta_list) + pblk_dma_meta_size; | |
405 | dma_ppa_list = dma_meta_list + pblk_dma_meta_size; | |
406 | ||
407 | rqd = pblk_alloc_rqd(pblk, WRITE); | |
408 | if (IS_ERR(rqd)) { | |
409 | ret = PTR_ERR(rqd); | |
410 | goto fail_free_meta; | |
411 | } | |
ee8d5c1a | 412 | |
3eaa11e2 JG |
413 | bio = pblk_bio_map_addr(pblk, data, rq_ppas, rq_len, |
414 | PBLK_VMALLOC_META, GFP_KERNEL); | |
ee8d5c1a JG |
415 | if (IS_ERR(bio)) { |
416 | ret = PTR_ERR(bio); | |
417 | goto fail_free_rqd; | |
418 | } | |
a4bd217b JG |
419 | |
420 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
421 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); | |
422 | ||
a4bd217b JG |
423 | rqd->bio = bio; |
424 | rqd->opcode = NVM_OP_PWRITE; | |
425 | rqd->flags = pblk_set_progr_mode(pblk, WRITE); | |
426 | rqd->meta_list = meta_list; | |
427 | rqd->nr_ppas = rq_ppas; | |
428 | rqd->ppa_list = ppa_list; | |
429 | rqd->dma_ppa_list = dma_ppa_list; | |
430 | rqd->dma_meta_list = dma_meta_list; | |
ee8d5c1a JG |
431 | rqd->end_io = pblk_end_io_recov; |
432 | rqd->private = pad_rq; | |
a4bd217b JG |
433 | |
434 | for (i = 0; i < rqd->nr_ppas; ) { | |
435 | struct ppa_addr ppa; | |
436 | int pos; | |
437 | ||
438 | w_ptr = pblk_alloc_page(pblk, line, pblk->min_write_pgs); | |
439 | ppa = addr_to_pblk_ppa(pblk, w_ptr, line->id); | |
440 | pos = pblk_ppa_to_pos(geo, ppa); | |
441 | ||
442 | while (test_bit(pos, line->blk_bitmap)) { | |
443 | w_ptr += pblk->min_write_pgs; | |
444 | ppa = addr_to_pblk_ppa(pblk, w_ptr, line->id); | |
445 | pos = pblk_ppa_to_pos(geo, ppa); | |
446 | } | |
447 | ||
448 | for (j = 0; j < pblk->min_write_pgs; j++, i++, w_ptr++) { | |
449 | struct ppa_addr dev_ppa; | |
f417aa0b | 450 | __le64 addr_empty = cpu_to_le64(ADDR_EMPTY); |
a4bd217b JG |
451 | |
452 | dev_ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); | |
453 | ||
454 | pblk_map_invalidate(pblk, dev_ppa); | |
caa69fa5 | 455 | lba_list[w_ptr] = meta_list[i].lba = addr_empty; |
a4bd217b JG |
456 | rqd->ppa_list[i] = dev_ppa; |
457 | } | |
458 | } | |
459 | ||
ee8d5c1a | 460 | kref_get(&pad_rq->ref); |
3eaa11e2 | 461 | pblk_down_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
ee8d5c1a | 462 | |
a4bd217b JG |
463 | ret = pblk_submit_io(pblk, rqd); |
464 | if (ret) { | |
465 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
3eaa11e2 JG |
466 | pblk_up_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
467 | goto fail_free_bio; | |
a4bd217b JG |
468 | } |
469 | ||
a4bd217b JG |
470 | left_line_ppas -= rq_ppas; |
471 | left_ppas -= rq_ppas; | |
ee8d5c1a | 472 | if (left_ppas && left_line_ppas) |
a4bd217b JG |
473 | goto next_pad_rq; |
474 | ||
ee8d5c1a JG |
475 | kref_put(&pad_rq->ref, pblk_recov_complete); |
476 | ||
477 | if (!wait_for_completion_io_timeout(&pad_rq->wait, | |
478 | msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) { | |
479 | pr_err("pblk: pad write timed out\n"); | |
480 | ret = -ETIME; | |
481 | } | |
482 | ||
3eaa11e2 JG |
483 | if (!pblk_line_is_full(line)) |
484 | pr_err("pblk: corrupted padded line: %d\n", line->id); | |
485 | ||
486 | vfree(data); | |
ee8d5c1a JG |
487 | free_rq: |
488 | kfree(pad_rq); | |
ee8d5c1a JG |
489 | return ret; |
490 | ||
3eaa11e2 JG |
491 | fail_free_bio: |
492 | bio_put(bio); | |
ee8d5c1a JG |
493 | fail_free_rqd: |
494 | pblk_free_rqd(pblk, rqd, WRITE); | |
495 | fail_free_meta: | |
496 | nvm_dev_dma_free(dev->parent, meta_list, dma_meta_list); | |
3eaa11e2 | 497 | fail_free_pad: |
ee8d5c1a | 498 | kfree(pad_rq); |
3eaa11e2 | 499 | vfree(data); |
ee8d5c1a | 500 | return ret; |
a4bd217b JG |
501 | } |
502 | ||
503 | /* When this function is called, it means that not all upper pages have been | |
504 | * written in a page that contains valid data. In order to recover this data, we | |
505 | * first find the write pointer on the device, then we pad all necessary | |
506 | * sectors, and finally attempt to read the valid data | |
507 | */ | |
508 | static int pblk_recov_scan_all_oob(struct pblk *pblk, struct pblk_line *line, | |
509 | struct pblk_recov_alloc p) | |
510 | { | |
511 | struct nvm_tgt_dev *dev = pblk->dev; | |
512 | struct nvm_geo *geo = &dev->geo; | |
513 | struct ppa_addr *ppa_list; | |
514 | struct pblk_sec_meta *meta_list; | |
515 | struct nvm_rq *rqd; | |
516 | struct bio *bio; | |
517 | void *data; | |
518 | dma_addr_t dma_ppa_list, dma_meta_list; | |
519 | u64 w_ptr = 0, r_ptr; | |
520 | int rq_ppas, rq_len; | |
521 | int i, j; | |
522 | int ret = 0; | |
523 | int rec_round; | |
524 | int left_ppas = pblk_calc_sec_in_line(pblk, line) - line->cur_sec; | |
525 | DECLARE_COMPLETION_ONSTACK(wait); | |
526 | ||
527 | ppa_list = p.ppa_list; | |
528 | meta_list = p.meta_list; | |
529 | rqd = p.rqd; | |
530 | data = p.data; | |
531 | dma_ppa_list = p.dma_ppa_list; | |
532 | dma_meta_list = p.dma_meta_list; | |
533 | ||
534 | /* we could recover up until the line write pointer */ | |
535 | r_ptr = line->cur_sec; | |
536 | rec_round = 0; | |
537 | ||
538 | next_rq: | |
084ec9ba | 539 | memset(rqd, 0, pblk_g_rq_size); |
a4bd217b JG |
540 | |
541 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
542 | if (!rq_ppas) | |
543 | rq_ppas = pblk->min_write_pgs; | |
544 | rq_len = rq_ppas * geo->sec_size; | |
545 | ||
546 | bio = bio_map_kern(dev->q, data, rq_len, GFP_KERNEL); | |
547 | if (IS_ERR(bio)) | |
548 | return PTR_ERR(bio); | |
549 | ||
550 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
551 | bio_set_op_attrs(bio, REQ_OP_READ, 0); | |
552 | ||
553 | rqd->bio = bio; | |
554 | rqd->opcode = NVM_OP_PREAD; | |
a4bd217b JG |
555 | rqd->meta_list = meta_list; |
556 | rqd->nr_ppas = rq_ppas; | |
557 | rqd->ppa_list = ppa_list; | |
558 | rqd->dma_ppa_list = dma_ppa_list; | |
559 | rqd->dma_meta_list = dma_meta_list; | |
560 | rqd->end_io = pblk_end_io_sync; | |
561 | rqd->private = &wait; | |
562 | ||
f9c10152 JG |
563 | if (pblk_io_aligned(pblk, rq_ppas)) |
564 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL); | |
565 | else | |
566 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM); | |
567 | ||
a4bd217b JG |
568 | for (i = 0; i < rqd->nr_ppas; ) { |
569 | struct ppa_addr ppa; | |
570 | int pos; | |
571 | ||
572 | w_ptr = pblk_alloc_page(pblk, line, pblk->min_write_pgs); | |
573 | ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); | |
574 | pos = pblk_dev_ppa_to_pos(geo, ppa); | |
575 | ||
576 | while (test_bit(pos, line->blk_bitmap)) { | |
577 | w_ptr += pblk->min_write_pgs; | |
578 | ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); | |
579 | pos = pblk_dev_ppa_to_pos(geo, ppa); | |
580 | } | |
581 | ||
582 | for (j = 0; j < pblk->min_write_pgs; j++, i++, w_ptr++) | |
583 | rqd->ppa_list[i] = | |
584 | addr_to_gen_ppa(pblk, w_ptr, line->id); | |
585 | } | |
586 | ||
587 | ret = pblk_submit_io(pblk, rqd); | |
588 | if (ret) { | |
589 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
590 | return ret; | |
591 | } | |
592 | ||
593 | if (!wait_for_completion_io_timeout(&wait, | |
594 | msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) { | |
595 | pr_err("pblk: L2P recovery read timed out\n"); | |
596 | } | |
588726d3 | 597 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
598 | reinit_completion(&wait); |
599 | ||
600 | /* This should not happen since the read failed during normal recovery, | |
601 | * but the media works funny sometimes... | |
602 | */ | |
603 | if (!rec_round++ && !rqd->error) { | |
604 | rec_round = 0; | |
605 | for (i = 0; i < rqd->nr_ppas; i++, r_ptr++) { | |
606 | u64 lba = le64_to_cpu(meta_list[i].lba); | |
607 | ||
608 | if (lba == ADDR_EMPTY || lba > pblk->rl.nr_secs) | |
609 | continue; | |
610 | ||
611 | pblk_update_map(pblk, lba, rqd->ppa_list[i]); | |
612 | } | |
613 | } | |
614 | ||
615 | /* Reached the end of the written line */ | |
616 | if (rqd->error == NVM_RSP_ERR_EMPTYPAGE) { | |
617 | int pad_secs, nr_error_bits, bit; | |
618 | int ret; | |
619 | ||
620 | bit = find_first_bit((void *)&rqd->ppa_status, rqd->nr_ppas); | |
621 | nr_error_bits = rqd->nr_ppas - bit; | |
622 | ||
623 | /* Roll back failed sectors */ | |
624 | line->cur_sec -= nr_error_bits; | |
625 | line->left_msecs += nr_error_bits; | |
626 | bitmap_clear(line->map_bitmap, line->cur_sec, nr_error_bits); | |
627 | ||
628 | pad_secs = pblk_pad_distance(pblk); | |
629 | if (pad_secs > line->left_msecs) | |
630 | pad_secs = line->left_msecs; | |
631 | ||
ee8d5c1a | 632 | ret = pblk_recov_pad_oob(pblk, line, pad_secs); |
a4bd217b JG |
633 | if (ret) |
634 | pr_err("pblk: OOB padding failed (err:%d)\n", ret); | |
635 | ||
636 | ret = pblk_recov_read_oob(pblk, line, p, r_ptr); | |
637 | if (ret) | |
638 | pr_err("pblk: OOB read failed (err:%d)\n", ret); | |
639 | ||
a4bd217b JG |
640 | left_ppas = 0; |
641 | } | |
642 | ||
643 | left_ppas -= rq_ppas; | |
644 | if (left_ppas > 0) | |
645 | goto next_rq; | |
646 | ||
647 | return ret; | |
648 | } | |
649 | ||
650 | static int pblk_recov_scan_oob(struct pblk *pblk, struct pblk_line *line, | |
651 | struct pblk_recov_alloc p, int *done) | |
652 | { | |
653 | struct nvm_tgt_dev *dev = pblk->dev; | |
654 | struct nvm_geo *geo = &dev->geo; | |
655 | struct ppa_addr *ppa_list; | |
656 | struct pblk_sec_meta *meta_list; | |
657 | struct nvm_rq *rqd; | |
658 | struct bio *bio; | |
659 | void *data; | |
660 | dma_addr_t dma_ppa_list, dma_meta_list; | |
661 | u64 paddr; | |
662 | int rq_ppas, rq_len; | |
663 | int i, j; | |
664 | int ret = 0; | |
665 | int left_ppas = pblk_calc_sec_in_line(pblk, line); | |
666 | DECLARE_COMPLETION_ONSTACK(wait); | |
667 | ||
668 | ppa_list = p.ppa_list; | |
669 | meta_list = p.meta_list; | |
670 | rqd = p.rqd; | |
671 | data = p.data; | |
672 | dma_ppa_list = p.dma_ppa_list; | |
673 | dma_meta_list = p.dma_meta_list; | |
674 | ||
675 | *done = 1; | |
676 | ||
677 | next_rq: | |
084ec9ba | 678 | memset(rqd, 0, pblk_g_rq_size); |
a4bd217b JG |
679 | |
680 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
681 | if (!rq_ppas) | |
682 | rq_ppas = pblk->min_write_pgs; | |
683 | rq_len = rq_ppas * geo->sec_size; | |
684 | ||
685 | bio = bio_map_kern(dev->q, data, rq_len, GFP_KERNEL); | |
686 | if (IS_ERR(bio)) | |
687 | return PTR_ERR(bio); | |
688 | ||
689 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
690 | bio_set_op_attrs(bio, REQ_OP_READ, 0); | |
691 | ||
692 | rqd->bio = bio; | |
693 | rqd->opcode = NVM_OP_PREAD; | |
a4bd217b JG |
694 | rqd->meta_list = meta_list; |
695 | rqd->nr_ppas = rq_ppas; | |
696 | rqd->ppa_list = ppa_list; | |
697 | rqd->dma_ppa_list = dma_ppa_list; | |
698 | rqd->dma_meta_list = dma_meta_list; | |
699 | rqd->end_io = pblk_end_io_sync; | |
700 | rqd->private = &wait; | |
701 | ||
f9c10152 JG |
702 | if (pblk_io_aligned(pblk, rq_ppas)) |
703 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL); | |
704 | else | |
705 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM); | |
706 | ||
a4bd217b JG |
707 | for (i = 0; i < rqd->nr_ppas; ) { |
708 | struct ppa_addr ppa; | |
709 | int pos; | |
710 | ||
711 | paddr = pblk_alloc_page(pblk, line, pblk->min_write_pgs); | |
712 | ppa = addr_to_gen_ppa(pblk, paddr, line->id); | |
713 | pos = pblk_dev_ppa_to_pos(geo, ppa); | |
714 | ||
715 | while (test_bit(pos, line->blk_bitmap)) { | |
716 | paddr += pblk->min_write_pgs; | |
717 | ppa = addr_to_gen_ppa(pblk, paddr, line->id); | |
718 | pos = pblk_dev_ppa_to_pos(geo, ppa); | |
719 | } | |
720 | ||
721 | for (j = 0; j < pblk->min_write_pgs; j++, i++, paddr++) | |
722 | rqd->ppa_list[i] = | |
723 | addr_to_gen_ppa(pblk, paddr, line->id); | |
724 | } | |
725 | ||
726 | ret = pblk_submit_io(pblk, rqd); | |
727 | if (ret) { | |
728 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
729 | bio_put(bio); | |
730 | return ret; | |
731 | } | |
732 | ||
733 | if (!wait_for_completion_io_timeout(&wait, | |
734 | msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) { | |
735 | pr_err("pblk: L2P recovery read timed out\n"); | |
736 | } | |
588726d3 | 737 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
738 | reinit_completion(&wait); |
739 | ||
740 | /* Reached the end of the written line */ | |
741 | if (rqd->error) { | |
742 | int nr_error_bits, bit; | |
743 | ||
744 | bit = find_first_bit((void *)&rqd->ppa_status, rqd->nr_ppas); | |
745 | nr_error_bits = rqd->nr_ppas - bit; | |
746 | ||
747 | /* Roll back failed sectors */ | |
748 | line->cur_sec -= nr_error_bits; | |
749 | line->left_msecs += nr_error_bits; | |
a4bd217b JG |
750 | bitmap_clear(line->map_bitmap, line->cur_sec, nr_error_bits); |
751 | ||
752 | left_ppas = 0; | |
753 | rqd->nr_ppas = bit; | |
754 | ||
755 | if (rqd->error != NVM_RSP_ERR_EMPTYPAGE) | |
756 | *done = 0; | |
757 | } | |
758 | ||
759 | for (i = 0; i < rqd->nr_ppas; i++) { | |
760 | u64 lba = le64_to_cpu(meta_list[i].lba); | |
761 | ||
762 | if (lba == ADDR_EMPTY || lba > pblk->rl.nr_secs) | |
763 | continue; | |
764 | ||
765 | pblk_update_map(pblk, lba, rqd->ppa_list[i]); | |
766 | } | |
767 | ||
768 | left_ppas -= rq_ppas; | |
769 | if (left_ppas > 0) | |
770 | goto next_rq; | |
771 | ||
772 | return ret; | |
773 | } | |
774 | ||
775 | /* Scan line for lbas on out of bound area */ | |
776 | static int pblk_recov_l2p_from_oob(struct pblk *pblk, struct pblk_line *line) | |
777 | { | |
778 | struct nvm_tgt_dev *dev = pblk->dev; | |
779 | struct nvm_geo *geo = &dev->geo; | |
780 | struct nvm_rq *rqd; | |
781 | struct ppa_addr *ppa_list; | |
782 | struct pblk_sec_meta *meta_list; | |
783 | struct pblk_recov_alloc p; | |
784 | void *data; | |
785 | dma_addr_t dma_ppa_list, dma_meta_list; | |
786 | int done, ret = 0; | |
787 | ||
788 | rqd = pblk_alloc_rqd(pblk, READ); | |
789 | if (IS_ERR(rqd)) | |
790 | return PTR_ERR(rqd); | |
791 | ||
792 | meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, &dma_meta_list); | |
793 | if (!meta_list) { | |
794 | ret = -ENOMEM; | |
795 | goto free_rqd; | |
796 | } | |
797 | ||
798 | ppa_list = (void *)(meta_list) + pblk_dma_meta_size; | |
799 | dma_ppa_list = dma_meta_list + pblk_dma_meta_size; | |
800 | ||
801 | data = kcalloc(pblk->max_write_pgs, geo->sec_size, GFP_KERNEL); | |
802 | if (!data) { | |
803 | ret = -ENOMEM; | |
804 | goto free_meta_list; | |
805 | } | |
806 | ||
807 | p.ppa_list = ppa_list; | |
808 | p.meta_list = meta_list; | |
809 | p.rqd = rqd; | |
810 | p.data = data; | |
811 | p.dma_ppa_list = dma_ppa_list; | |
812 | p.dma_meta_list = dma_meta_list; | |
813 | ||
814 | ret = pblk_recov_scan_oob(pblk, line, p, &done); | |
815 | if (ret) { | |
816 | pr_err("pblk: could not recover L2P from OOB\n"); | |
817 | goto out; | |
818 | } | |
819 | ||
820 | if (!done) { | |
821 | ret = pblk_recov_scan_all_oob(pblk, line, p); | |
822 | if (ret) { | |
823 | pr_err("pblk: could not recover L2P from OOB\n"); | |
824 | goto out; | |
825 | } | |
826 | } | |
827 | ||
828 | if (pblk_line_is_full(line)) | |
829 | pblk_line_recov_close(pblk, line); | |
830 | ||
831 | out: | |
832 | kfree(data); | |
833 | free_meta_list: | |
834 | nvm_dev_dma_free(dev->parent, meta_list, dma_meta_list); | |
835 | free_rqd: | |
836 | pblk_free_rqd(pblk, rqd, READ); | |
837 | ||
838 | return ret; | |
839 | } | |
840 | ||
841 | /* Insert lines ordered by sequence number (seq_num) on list */ | |
842 | static void pblk_recov_line_add_ordered(struct list_head *head, | |
843 | struct pblk_line *line) | |
844 | { | |
845 | struct pblk_line *t = NULL; | |
846 | ||
847 | list_for_each_entry(t, head, list) | |
848 | if (t->seq_nr > line->seq_nr) | |
849 | break; | |
850 | ||
851 | __list_add(&line->list, t->list.prev, &t->list); | |
852 | } | |
853 | ||
854 | struct pblk_line *pblk_recov_l2p(struct pblk *pblk) | |
855 | { | |
856 | struct nvm_tgt_dev *dev = pblk->dev; | |
857 | struct nvm_geo *geo = &dev->geo; | |
858 | struct pblk_line_meta *lm = &pblk->lm; | |
859 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
860 | struct pblk_line *line, *tline, *data_line = NULL; | |
dd2a4343 JG |
861 | struct pblk_smeta *smeta; |
862 | struct pblk_emeta *emeta; | |
863 | struct line_smeta *smeta_buf; | |
a4bd217b JG |
864 | int found_lines = 0, recovered_lines = 0, open_lines = 0; |
865 | int is_next = 0; | |
866 | int meta_line; | |
867 | int i, valid_uuid = 0; | |
868 | LIST_HEAD(recov_list); | |
869 | ||
870 | /* TODO: Implement FTL snapshot */ | |
871 | ||
872 | /* Scan recovery - takes place when FTL snapshot fails */ | |
873 | spin_lock(&l_mg->free_lock); | |
874 | meta_line = find_first_zero_bit(&l_mg->meta_bitmap, PBLK_DATA_LINES); | |
875 | set_bit(meta_line, &l_mg->meta_bitmap); | |
dd2a4343 JG |
876 | smeta = l_mg->sline_meta[meta_line]; |
877 | emeta = l_mg->eline_meta[meta_line]; | |
8224cbd8 | 878 | smeta_buf = (struct line_smeta *)smeta; |
a4bd217b JG |
879 | spin_unlock(&l_mg->free_lock); |
880 | ||
881 | /* Order data lines using their sequence number */ | |
882 | for (i = 0; i < l_mg->nr_lines; i++) { | |
883 | u32 crc; | |
884 | ||
885 | line = &pblk->lines[i]; | |
886 | ||
887 | memset(smeta, 0, lm->smeta_len); | |
888 | line->smeta = smeta; | |
dd2a4343 | 889 | line->lun_bitmap = ((void *)(smeta_buf)) + |
a4bd217b JG |
890 | sizeof(struct line_smeta); |
891 | ||
892 | /* Lines that cannot be read are assumed as not written here */ | |
893 | if (pblk_line_read_smeta(pblk, line)) | |
894 | continue; | |
895 | ||
dd2a4343 JG |
896 | crc = pblk_calc_smeta_crc(pblk, smeta_buf); |
897 | if (le32_to_cpu(smeta_buf->crc) != crc) | |
a4bd217b JG |
898 | continue; |
899 | ||
dd2a4343 | 900 | if (le32_to_cpu(smeta_buf->header.identifier) != PBLK_MAGIC) |
a4bd217b JG |
901 | continue; |
902 | ||
dd2a4343 | 903 | if (le16_to_cpu(smeta_buf->header.version) != 1) { |
a4bd217b | 904 | pr_err("pblk: found incompatible line version %u\n", |
dd2a4343 | 905 | smeta_buf->header.version); |
a4bd217b JG |
906 | return ERR_PTR(-EINVAL); |
907 | } | |
908 | ||
909 | /* The first valid instance uuid is used for initialization */ | |
910 | if (!valid_uuid) { | |
dd2a4343 | 911 | memcpy(pblk->instance_uuid, smeta_buf->header.uuid, 16); |
a4bd217b JG |
912 | valid_uuid = 1; |
913 | } | |
914 | ||
dd2a4343 | 915 | if (memcmp(pblk->instance_uuid, smeta_buf->header.uuid, 16)) { |
a4bd217b JG |
916 | pr_debug("pblk: ignore line %u due to uuid mismatch\n", |
917 | i); | |
918 | continue; | |
919 | } | |
920 | ||
921 | /* Update line metadata */ | |
922 | spin_lock(&line->lock); | |
dd2a4343 JG |
923 | line->id = le32_to_cpu(smeta_buf->header.id); |
924 | line->type = le16_to_cpu(smeta_buf->header.type); | |
925 | line->seq_nr = le64_to_cpu(smeta_buf->seq_nr); | |
a4bd217b JG |
926 | spin_unlock(&line->lock); |
927 | ||
928 | /* Update general metadata */ | |
929 | spin_lock(&l_mg->free_lock); | |
930 | if (line->seq_nr >= l_mg->d_seq_nr) | |
931 | l_mg->d_seq_nr = line->seq_nr + 1; | |
932 | l_mg->nr_free_lines--; | |
933 | spin_unlock(&l_mg->free_lock); | |
934 | ||
935 | if (pblk_line_recov_alloc(pblk, line)) | |
936 | goto out; | |
937 | ||
938 | pblk_recov_line_add_ordered(&recov_list, line); | |
939 | found_lines++; | |
940 | pr_debug("pblk: recovering data line %d, seq:%llu\n", | |
dd2a4343 | 941 | line->id, smeta_buf->seq_nr); |
a4bd217b JG |
942 | } |
943 | ||
944 | if (!found_lines) { | |
945 | pblk_setup_uuid(pblk); | |
946 | ||
947 | spin_lock(&l_mg->free_lock); | |
948 | WARN_ON_ONCE(!test_and_clear_bit(meta_line, | |
949 | &l_mg->meta_bitmap)); | |
950 | spin_unlock(&l_mg->free_lock); | |
951 | ||
952 | goto out; | |
953 | } | |
954 | ||
955 | /* Verify closed blocks and recover this portion of L2P table*/ | |
956 | list_for_each_entry_safe(line, tline, &recov_list, list) { | |
957 | int off, nr_bb; | |
958 | ||
959 | recovered_lines++; | |
960 | /* Calculate where emeta starts based on the line bb */ | |
dd2a4343 | 961 | off = lm->sec_per_line - lm->emeta_sec[0]; |
a4bd217b JG |
962 | nr_bb = bitmap_weight(line->blk_bitmap, lm->blk_per_line); |
963 | off -= nr_bb * geo->sec_per_pl; | |
964 | ||
a4bd217b | 965 | line->emeta_ssec = off; |
8224cbd8 JG |
966 | line->emeta = emeta; |
967 | memset(line->emeta->buf, 0, lm->emeta_len[0]); | |
a4bd217b | 968 | |
dd2a4343 | 969 | if (pblk_line_read_emeta(pblk, line, line->emeta->buf)) { |
a4bd217b JG |
970 | pblk_recov_l2p_from_oob(pblk, line); |
971 | goto next; | |
972 | } | |
973 | ||
974 | if (pblk_recov_l2p_from_emeta(pblk, line)) | |
975 | pblk_recov_l2p_from_oob(pblk, line); | |
976 | ||
977 | next: | |
978 | if (pblk_line_is_full(line)) { | |
979 | struct list_head *move_list; | |
980 | ||
981 | spin_lock(&line->lock); | |
982 | line->state = PBLK_LINESTATE_CLOSED; | |
983 | move_list = pblk_line_gc_list(pblk, line); | |
984 | spin_unlock(&line->lock); | |
985 | ||
986 | spin_lock(&l_mg->gc_lock); | |
987 | list_move_tail(&line->list, move_list); | |
988 | spin_unlock(&l_mg->gc_lock); | |
989 | ||
990 | mempool_free(line->map_bitmap, pblk->line_meta_pool); | |
991 | line->map_bitmap = NULL; | |
992 | line->smeta = NULL; | |
993 | line->emeta = NULL; | |
994 | } else { | |
995 | if (open_lines > 1) | |
996 | pr_err("pblk: failed to recover L2P\n"); | |
997 | ||
998 | open_lines++; | |
999 | line->meta_line = meta_line; | |
1000 | data_line = line; | |
1001 | } | |
1002 | } | |
1003 | ||
1004 | spin_lock(&l_mg->free_lock); | |
1005 | if (!open_lines) { | |
1006 | WARN_ON_ONCE(!test_and_clear_bit(meta_line, | |
1007 | &l_mg->meta_bitmap)); | |
1008 | pblk_line_replace_data(pblk); | |
1009 | } else { | |
1010 | /* Allocate next line for preparation */ | |
1011 | l_mg->data_next = pblk_line_get(pblk); | |
1012 | if (l_mg->data_next) { | |
1013 | l_mg->data_next->seq_nr = l_mg->d_seq_nr++; | |
1014 | l_mg->data_next->type = PBLK_LINETYPE_DATA; | |
1015 | is_next = 1; | |
1016 | } | |
1017 | } | |
1018 | spin_unlock(&l_mg->free_lock); | |
1019 | ||
1020 | if (is_next) { | |
1021 | pblk_line_erase(pblk, l_mg->data_next); | |
1022 | pblk_rl_free_lines_dec(&pblk->rl, l_mg->data_next); | |
1023 | } | |
1024 | ||
1025 | out: | |
1026 | if (found_lines != recovered_lines) | |
1027 | pr_err("pblk: failed to recover all found lines %d/%d\n", | |
1028 | found_lines, recovered_lines); | |
1029 | ||
1030 | return data_line; | |
1031 | } | |
1032 | ||
1033 | /* | |
588726d3 | 1034 | * Pad current line |
a4bd217b | 1035 | */ |
588726d3 | 1036 | int pblk_recov_pad(struct pblk *pblk) |
a4bd217b | 1037 | { |
a4bd217b JG |
1038 | struct pblk_line *line; |
1039 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
588726d3 JG |
1040 | int left_msecs; |
1041 | int ret = 0; | |
a4bd217b JG |
1042 | |
1043 | spin_lock(&l_mg->free_lock); | |
1044 | line = l_mg->data_line; | |
588726d3 | 1045 | left_msecs = line->left_msecs; |
a4bd217b JG |
1046 | spin_unlock(&l_mg->free_lock); |
1047 | ||
ee8d5c1a | 1048 | ret = pblk_recov_pad_oob(pblk, line, left_msecs); |
588726d3 JG |
1049 | if (ret) { |
1050 | pr_err("pblk: Tear down padding failed (%d)\n", ret); | |
ee8d5c1a | 1051 | return ret; |
a4bd217b JG |
1052 | } |
1053 | ||
588726d3 | 1054 | pblk_line_close_meta(pblk, line); |
588726d3 | 1055 | return ret; |
a4bd217b | 1056 | } |