1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright (C) 2016 CNEX Labs 4 * Initial release: Javier Gonzalez <javier@cnexlabs.com> 5 * Matias Bjorling <matias@cnexlabs.com> 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License version 9 * 2 as published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 * pblk-write.c - pblk's write path from write buffer to media 17 */ 18 19#include "pblk.h" 20#include "pblk-trace.h" 21 22static unsigned long pblk_end_w_bio(struct pblk *pblk, struct nvm_rq *rqd, 23 struct pblk_c_ctx *c_ctx) 24{ 25 struct bio *original_bio; 26 struct pblk_rb *rwb = &pblk->rwb; 27 unsigned long ret; 28 int i; 29 30 for (i = 0; i < c_ctx->nr_valid; i++) { 31 struct pblk_w_ctx *w_ctx; 32 int pos = c_ctx->sentry + i; 33 int flags; 34 35 w_ctx = pblk_rb_w_ctx(rwb, pos); 36 flags = READ_ONCE(w_ctx->flags); 37 38 if (flags & PBLK_FLUSH_ENTRY) { 39 flags &= ~PBLK_FLUSH_ENTRY; 40 /* Release flags on context. Protect from writes */ 41 smp_store_release(&w_ctx->flags, flags); 42 43#ifdef CONFIG_NVM_PBLK_DEBUG 44 atomic_dec(&rwb->inflight_flush_point); 45#endif 46 } 47 48 while ((original_bio = bio_list_pop(&w_ctx->bios))) 49 bio_endio(original_bio); 50 } 51 52 if (c_ctx->nr_padded) 53 pblk_bio_free_pages(pblk, rqd->bio, c_ctx->nr_valid, 54 c_ctx->nr_padded); 55 56#ifdef CONFIG_NVM_PBLK_DEBUG 57 atomic_long_add(rqd->nr_ppas, &pblk->sync_writes); 58#endif 59 60 ret = pblk_rb_sync_advance(&pblk->rwb, c_ctx->nr_valid); 61 62 bio_put(rqd->bio); 63 pblk_free_rqd(pblk, rqd, PBLK_WRITE); 64 65 return ret; 66} 67 68static unsigned long pblk_end_queued_w_bio(struct pblk *pblk, 69 struct nvm_rq *rqd, 70 struct pblk_c_ctx *c_ctx) 71{ 72 list_del(&c_ctx->list); 73 return pblk_end_w_bio(pblk, rqd, c_ctx); 74} 75 76static void pblk_complete_write(struct pblk *pblk, struct nvm_rq *rqd, 77 struct pblk_c_ctx *c_ctx) 78{ 79 struct pblk_c_ctx *c, *r; 80 unsigned long flags; 81 unsigned long pos; 82 83#ifdef CONFIG_NVM_PBLK_DEBUG 84 atomic_long_sub(c_ctx->nr_valid, &pblk->inflight_writes); 85#endif 86 pblk_up_rq(pblk, c_ctx->lun_bitmap); 87 88 pos = pblk_rb_sync_init(&pblk->rwb, &flags); 89 if (pos == c_ctx->sentry) { 90 pos = pblk_end_w_bio(pblk, rqd, c_ctx); 91 92retry: 93 list_for_each_entry_safe(c, r, &pblk->compl_list, list) { 94 rqd = nvm_rq_from_c_ctx(c); 95 if (c->sentry == pos) { 96 pos = pblk_end_queued_w_bio(pblk, rqd, c); 97 goto retry; 98 } 99 } 100 } else { 101 WARN_ON(nvm_rq_from_c_ctx(c_ctx) != rqd); 102 list_add_tail(&c_ctx->list, &pblk->compl_list); 103 } 104 pblk_rb_sync_end(&pblk->rwb, &flags); 105} 106 107/* Map remaining sectors in chunk, starting from ppa */ 108static void pblk_map_remaining(struct pblk *pblk, struct ppa_addr *ppa, 109 int rqd_ppas) 110{ 111 struct pblk_line *line; 112 struct ppa_addr map_ppa = *ppa; 113 __le64 addr_empty = cpu_to_le64(ADDR_EMPTY); 114 __le64 *lba_list; 115 u64 paddr; 116 int done = 0; 117 int n = 0; 118 119 line = pblk_ppa_to_line(pblk, *ppa); 120 lba_list = emeta_to_lbas(pblk, line->emeta->buf); 121 122 spin_lock(&line->lock); 123 124 while (!done) { 125 paddr = pblk_dev_ppa_to_line_addr(pblk, map_ppa); 126 127 if (!test_and_set_bit(paddr, line->map_bitmap)) 128 line->left_msecs--; 129 130 if (n < rqd_ppas && lba_list[paddr] != addr_empty) 131 line->nr_valid_lbas--; 132 133 lba_list[paddr] = addr_empty; 134 135 if (!test_and_set_bit(paddr, line->invalid_bitmap)) 136 le32_add_cpu(line->vsc, -1); 137 138 done = nvm_next_ppa_in_chk(pblk->dev, &map_ppa); 139 140 n++; 141 } 142 143 line->w_err_gc->has_write_err = 1; 144 spin_unlock(&line->lock); 145} 146 147static void pblk_prepare_resubmit(struct pblk *pblk, unsigned int sentry, 148 unsigned int nr_entries) 149{ 150 struct pblk_rb *rb = &pblk->rwb; 151 struct pblk_rb_entry *entry; 152 struct pblk_line *line; 153 struct pblk_w_ctx *w_ctx; 154 struct ppa_addr ppa_l2p; 155 int flags; 156 unsigned int i; 157 158 spin_lock(&pblk->trans_lock); 159 for (i = 0; i < nr_entries; i++) { 160 entry = &rb->entries[pblk_rb_ptr_wrap(rb, sentry, i)]; 161 w_ctx = &entry->w_ctx; 162 163 /* Check if the lba has been overwritten */ 164 if (w_ctx->lba != ADDR_EMPTY) { 165 ppa_l2p = pblk_trans_map_get(pblk, w_ctx->lba); 166 if (!pblk_ppa_comp(ppa_l2p, entry->cacheline)) 167 w_ctx->lba = ADDR_EMPTY; 168 } 169 170 /* Mark up the entry as submittable again */ 171 flags = READ_ONCE(w_ctx->flags); 172 flags |= PBLK_WRITTEN_DATA; 173 /* Release flags on write context. Protect from writes */ 174 smp_store_release(&w_ctx->flags, flags); 175 176 /* Decrease the reference count to the line as we will 177 * re-map these entries 178 */ 179 line = pblk_ppa_to_line(pblk, w_ctx->ppa); 180 atomic_dec(&line->sec_to_update); 181 kref_put(&line->ref, pblk_line_put); 182 } 183 spin_unlock(&pblk->trans_lock); 184} 185 186static void pblk_queue_resubmit(struct pblk *pblk, struct pblk_c_ctx *c_ctx) 187{ 188 struct pblk_c_ctx *r_ctx; 189 190 r_ctx = kzalloc(sizeof(struct pblk_c_ctx), GFP_KERNEL); 191 if (!r_ctx) 192 return; 193 194 r_ctx->lun_bitmap = NULL; 195 r_ctx->sentry = c_ctx->sentry; 196 r_ctx->nr_valid = c_ctx->nr_valid; 197 r_ctx->nr_padded = c_ctx->nr_padded; 198 199 spin_lock(&pblk->resubmit_lock); 200 list_add_tail(&r_ctx->list, &pblk->resubmit_list); 201 spin_unlock(&pblk->resubmit_lock); 202 203#ifdef CONFIG_NVM_PBLK_DEBUG 204 atomic_long_add(c_ctx->nr_valid, &pblk->recov_writes); 205#endif 206} 207 208static void pblk_submit_rec(struct work_struct *work) 209{ 210 struct pblk_rec_ctx *recovery = 211 container_of(work, struct pblk_rec_ctx, ws_rec); 212 struct pblk *pblk = recovery->pblk; 213 struct nvm_rq *rqd = recovery->rqd; 214 struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); 215 struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd); 216 217 pblk_log_write_err(pblk, rqd); 218 219 pblk_map_remaining(pblk, ppa_list, rqd->nr_ppas); 220 pblk_queue_resubmit(pblk, c_ctx); 221 222 pblk_up_rq(pblk, c_ctx->lun_bitmap); 223 if (c_ctx->nr_padded) 224 pblk_bio_free_pages(pblk, rqd->bio, c_ctx->nr_valid, 225 c_ctx->nr_padded); 226 bio_put(rqd->bio); 227 pblk_free_rqd(pblk, rqd, PBLK_WRITE); 228 mempool_free(recovery, &pblk->rec_pool); 229 230 atomic_dec(&pblk->inflight_io); 231 pblk_write_kick(pblk); 232} 233 234 235static void pblk_end_w_fail(struct pblk *pblk, struct nvm_rq *rqd) 236{ 237 struct pblk_rec_ctx *recovery; 238 239 recovery = mempool_alloc(&pblk->rec_pool, GFP_ATOMIC); 240 if (!recovery) { 241 pblk_err(pblk, "could not allocate recovery work\n"); 242 return; 243 } 244 245 recovery->pblk = pblk; 246 recovery->rqd = rqd; 247 248 INIT_WORK(&recovery->ws_rec, pblk_submit_rec); 249 queue_work(pblk->close_wq, &recovery->ws_rec); 250} 251 252static void pblk_end_io_write(struct nvm_rq *rqd) 253{ 254 struct pblk *pblk = rqd->private; 255 struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); 256 257 if (rqd->error) { 258 pblk_end_w_fail(pblk, rqd); 259 return; 260 } else { 261 if (trace_pblk_chunk_state_enabled()) 262 pblk_check_chunk_state_update(pblk, rqd); 263#ifdef CONFIG_NVM_PBLK_DEBUG 264 WARN_ONCE(rqd->bio->bi_status, "pblk: corrupted write error\n"); 265#endif 266 } 267 268 pblk_complete_write(pblk, rqd, c_ctx); 269 atomic_dec(&pblk->inflight_io); 270} 271 272static void pblk_end_io_write_meta(struct nvm_rq *rqd) 273{ 274 struct pblk *pblk = rqd->private; 275 struct pblk_g_ctx *m_ctx = nvm_rq_to_pdu(rqd); 276 struct pblk_line *line = m_ctx->private; 277 struct pblk_emeta *emeta = line->emeta; 278 struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd); 279 int sync; 280 281 pblk_up_chunk(pblk, ppa_list[0]); 282 283 if (rqd->error) { 284 pblk_log_write_err(pblk, rqd); 285 pblk_err(pblk, "metadata I/O failed. Line %d\n", line->id); 286 line->w_err_gc->has_write_err = 1; 287 } else { 288 if (trace_pblk_chunk_state_enabled()) 289 pblk_check_chunk_state_update(pblk, rqd); 290 } 291 292 sync = atomic_add_return(rqd->nr_ppas, &emeta->sync); 293 if (sync == emeta->nr_entries) 294 pblk_gen_run_ws(pblk, line, NULL, pblk_line_close_ws, 295 GFP_ATOMIC, pblk->close_wq); 296 297 pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); 298 299 atomic_dec(&pblk->inflight_io); 300} 301 302static int pblk_alloc_w_rq(struct pblk *pblk, struct nvm_rq *rqd, 303 unsigned int nr_secs, nvm_end_io_fn(*end_io)) 304{ 305 /* Setup write request */ 306 rqd->opcode = NVM_OP_PWRITE; 307 rqd->nr_ppas = nr_secs; 308 rqd->is_seq = 1; 309 rqd->private = pblk; 310 rqd->end_io = end_io; 311 312 return pblk_alloc_rqd_meta(pblk, rqd); 313} 314 315static int pblk_setup_w_rq(struct pblk *pblk, struct nvm_rq *rqd, 316 struct ppa_addr *erase_ppa) 317{ 318 struct pblk_line_meta *lm = &pblk->lm; 319 struct pblk_line *e_line = pblk_line_get_erase(pblk); 320 struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); 321 unsigned int valid = c_ctx->nr_valid; 322 unsigned int padded = c_ctx->nr_padded; 323 unsigned int nr_secs = valid + padded; 324 unsigned long *lun_bitmap; 325 int ret; 326 327 lun_bitmap = kzalloc(lm->lun_bitmap_len, GFP_KERNEL); 328 if (!lun_bitmap) 329 return -ENOMEM; 330 c_ctx->lun_bitmap = lun_bitmap; 331 332 ret = pblk_alloc_w_rq(pblk, rqd, nr_secs, pblk_end_io_write); 333 if (ret) { 334 kfree(lun_bitmap); 335 return ret; 336 } 337 338 if (likely(!e_line || !atomic_read(&e_line->left_eblks))) 339 ret = pblk_map_rq(pblk, rqd, c_ctx->sentry, lun_bitmap, 340 valid, 0); 341 else 342 ret = pblk_map_erase_rq(pblk, rqd, c_ctx->sentry, lun_bitmap, 343 valid, erase_ppa); 344 345 return ret; 346} 347 348static int pblk_calc_secs_to_sync(struct pblk *pblk, unsigned int secs_avail, 349 unsigned int secs_to_flush) 350{ 351 int secs_to_sync; 352 353 secs_to_sync = pblk_calc_secs(pblk, secs_avail, secs_to_flush, true); 354 355#ifdef CONFIG_NVM_PBLK_DEBUG 356 if ((!secs_to_sync && secs_to_flush) 357 || (secs_to_sync < 0) 358 || (secs_to_sync > secs_avail && !secs_to_flush)) { 359 pblk_err(pblk, "bad sector calculation (a:%d,s:%d,f:%d)\n", 360 secs_avail, secs_to_sync, secs_to_flush); 361 } 362#endif 363 364 return secs_to_sync; 365} 366 367int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line) 368{ 369 struct nvm_tgt_dev *dev = pblk->dev; 370 struct nvm_geo *geo = &dev->geo; 371 struct pblk_line_mgmt *l_mg = &pblk->l_mg; 372 struct pblk_line_meta *lm = &pblk->lm; 373 struct pblk_emeta *emeta = meta_line->emeta; 374 struct ppa_addr *ppa_list; 375 struct pblk_g_ctx *m_ctx; 376 struct nvm_rq *rqd; 377 void *data; 378 u64 paddr; 379 int rq_ppas = pblk->min_write_pgs; 380 int id = meta_line->id; 381 int rq_len; 382 int i, j; 383 int ret; 384 385 rqd = pblk_alloc_rqd(pblk, PBLK_WRITE_INT); 386 387 m_ctx = nvm_rq_to_pdu(rqd); 388 m_ctx->private = meta_line; 389 390 rq_len = rq_ppas * geo->csecs; 391 data = ((void *)emeta->buf) + emeta->mem; 392 393 ret = pblk_alloc_w_rq(pblk, rqd, rq_ppas, pblk_end_io_write_meta); 394 if (ret) 395 goto fail_free_rqd; 396 397 ppa_list = nvm_rq_to_ppa_list(rqd); 398 for (i = 0; i < rqd->nr_ppas; ) { 399 spin_lock(&meta_line->lock); 400 paddr = __pblk_alloc_page(pblk, meta_line, rq_ppas); 401 spin_unlock(&meta_line->lock); 402 for (j = 0; j < rq_ppas; j++, i++, paddr++) 403 ppa_list[i] = addr_to_gen_ppa(pblk, paddr, id); 404 } 405 406 spin_lock(&l_mg->close_lock); 407 emeta->mem += rq_len; 408 if (emeta->mem >= lm->emeta_len[0]) 409 list_del(&meta_line->list); 410 spin_unlock(&l_mg->close_lock); 411 412 pblk_down_chunk(pblk, ppa_list[0]); 413 414 ret = pblk_submit_io(pblk, rqd, data); 415 if (ret) { 416 pblk_err(pblk, "emeta I/O submission failed: %d\n", ret); 417 goto fail_rollback; 418 } 419 420 return NVM_IO_OK; 421 422fail_rollback: 423 pblk_up_chunk(pblk, ppa_list[0]); 424 spin_lock(&l_mg->close_lock); 425 pblk_dealloc_page(pblk, meta_line, rq_ppas); 426 list_add(&meta_line->list, &meta_line->list); 427 spin_unlock(&l_mg->close_lock); 428fail_free_rqd: 429 pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); 430 return ret; 431} 432 433static inline bool pblk_valid_meta_ppa(struct pblk *pblk, 434 struct pblk_line *meta_line, 435 struct nvm_rq *data_rqd) 436{ 437 struct nvm_tgt_dev *dev = pblk->dev; 438 struct nvm_geo *geo = &dev->geo; 439 struct pblk_c_ctx *data_c_ctx = nvm_rq_to_pdu(data_rqd); 440 struct pblk_line *data_line = pblk_line_get_data(pblk); 441 struct ppa_addr ppa, ppa_opt; 442 u64 paddr; 443 int pos_opt; 444 445 /* Schedule a metadata I/O that is half the distance from the data I/O 446 * with regards to the number of LUNs forming the pblk instance. This 447 * balances LUN conflicts across every I/O. 448 * 449 * When the LUN configuration changes (e.g., due to GC), this distance 450 * can align, which would result on metadata and data I/Os colliding. In 451 * this case, modify the distance to not be optimal, but move the 452 * optimal in the right direction. 453 */ 454 paddr = pblk_lookup_page(pblk, meta_line); 455 ppa = addr_to_gen_ppa(pblk, paddr, 0); 456 ppa_opt = addr_to_gen_ppa(pblk, paddr + data_line->meta_distance, 0); 457 pos_opt = pblk_ppa_to_pos(geo, ppa_opt); 458 459 if (test_bit(pos_opt, data_c_ctx->lun_bitmap) || 460 test_bit(pos_opt, data_line->blk_bitmap)) 461 return true; 462 463 if (unlikely(pblk_ppa_comp(ppa_opt, ppa))) 464 data_line->meta_distance--; 465 466 return false; 467} 468 469static struct pblk_line *pblk_should_submit_meta_io(struct pblk *pblk, 470 struct nvm_rq *data_rqd) 471{ 472 struct pblk_line_meta *lm = &pblk->lm; 473 struct pblk_line_mgmt *l_mg = &pblk->l_mg; 474 struct pblk_line *meta_line; 475 476 spin_lock(&l_mg->close_lock); 477 if (list_empty(&l_mg->emeta_list)) { 478 spin_unlock(&l_mg->close_lock); 479 return NULL; 480 } 481 meta_line = list_first_entry(&l_mg->emeta_list, struct pblk_line, list); 482 if (meta_line->emeta->mem >= lm->emeta_len[0]) { 483 spin_unlock(&l_mg->close_lock); 484 return NULL; 485 } 486 spin_unlock(&l_mg->close_lock); 487 488 if (!pblk_valid_meta_ppa(pblk, meta_line, data_rqd)) 489 return NULL; 490 491 return meta_line; 492} 493 494static int pblk_submit_io_set(struct pblk *pblk, struct nvm_rq *rqd) 495{ 496 struct ppa_addr erase_ppa; 497 struct pblk_line *meta_line; 498 int err; 499 500 pblk_ppa_set_empty(&erase_ppa); 501 502 /* Assign lbas to ppas and populate request structure */ 503 err = pblk_setup_w_rq(pblk, rqd, &erase_ppa); 504 if (err) { 505 pblk_err(pblk, "could not setup write request: %d\n", err); 506 return NVM_IO_ERR; 507 } 508 509 meta_line = pblk_should_submit_meta_io(pblk, rqd); 510 511 /* Submit data write for current data line */ 512 err = pblk_submit_io(pblk, rqd, NULL); 513 if (err) { 514 pblk_err(pblk, "data I/O submission failed: %d\n", err); 515 return NVM_IO_ERR; 516 } 517 518 if (!pblk_ppa_empty(erase_ppa)) { 519 /* Submit erase for next data line */ 520 if (pblk_blk_erase_async(pblk, erase_ppa)) { 521 struct pblk_line *e_line = pblk_line_get_erase(pblk); 522 struct nvm_tgt_dev *dev = pblk->dev; 523 struct nvm_geo *geo = &dev->geo; 524 int bit; 525 526 atomic_inc(&e_line->left_eblks); 527 bit = pblk_ppa_to_pos(geo, erase_ppa); 528 WARN_ON(!test_and_clear_bit(bit, e_line->erase_bitmap)); 529 } 530 } 531 532 if (meta_line) { 533 /* Submit metadata write for previous data line */ 534 err = pblk_submit_meta_io(pblk, meta_line); 535 if (err) { 536 pblk_err(pblk, "metadata I/O submission failed: %d", 537 err); 538 return NVM_IO_ERR; 539 } 540 } 541 542 return NVM_IO_OK; 543} 544 545static void pblk_free_write_rqd(struct pblk *pblk, struct nvm_rq *rqd) 546{ 547 struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); 548 struct bio *bio = rqd->bio; 549 550 if (c_ctx->nr_padded) 551 pblk_bio_free_pages(pblk, bio, c_ctx->nr_valid, 552 c_ctx->nr_padded); 553} 554 555static int pblk_submit_write(struct pblk *pblk, int *secs_left) 556{ 557 struct bio *bio; 558 struct nvm_rq *rqd; 559 unsigned int secs_avail, secs_to_sync, secs_to_com; 560 unsigned int secs_to_flush, packed_meta_pgs; 561 unsigned long pos; 562 unsigned int resubmit; 563 564 *secs_left = 0; 565 566 spin_lock(&pblk->resubmit_lock); 567 resubmit = !list_empty(&pblk->resubmit_list); 568 spin_unlock(&pblk->resubmit_lock); 569 570 /* Resubmit failed writes first */ 571 if (resubmit) { 572 struct pblk_c_ctx *r_ctx; 573 574 spin_lock(&pblk->resubmit_lock); 575 r_ctx = list_first_entry(&pblk->resubmit_list, 576 struct pblk_c_ctx, list); 577 list_del(&r_ctx->list); 578 spin_unlock(&pblk->resubmit_lock); 579 580 secs_avail = r_ctx->nr_valid; 581 pos = r_ctx->sentry; 582 583 pblk_prepare_resubmit(pblk, pos, secs_avail); 584 secs_to_sync = pblk_calc_secs_to_sync(pblk, secs_avail, 585 secs_avail); 586 587 kfree(r_ctx); 588 } else { 589 /* If there are no sectors in the cache, 590 * flushes (bios without data) will be cleared on 591 * the cache threads 592 */ 593 secs_avail = pblk_rb_read_count(&pblk->rwb); 594 if (!secs_avail) 595 return 0; 596 597 secs_to_flush = pblk_rb_flush_point_count(&pblk->rwb); 598 if (!secs_to_flush && secs_avail < pblk->min_write_pgs_data) 599 return 0; 600 601 secs_to_sync = pblk_calc_secs_to_sync(pblk, secs_avail, 602 secs_to_flush); 603 if (secs_to_sync > pblk->max_write_pgs) { 604 pblk_err(pblk, "bad buffer sync calculation\n"); 605 return 0; 606 } 607 608 secs_to_com = (secs_to_sync > secs_avail) ? 609 secs_avail : secs_to_sync; 610 pos = pblk_rb_read_commit(&pblk->rwb, secs_to_com); 611 } 612 613 packed_meta_pgs = (pblk->min_write_pgs - pblk->min_write_pgs_data); 614 bio = bio_alloc(GFP_KERNEL, secs_to_sync + packed_meta_pgs); 615 616 bio->bi_iter.bi_sector = 0; /* internal bio */ 617 bio_set_op_attrs(bio, REQ_OP_WRITE, 0); 618 619 rqd = pblk_alloc_rqd(pblk, PBLK_WRITE); 620 rqd->bio = bio; 621 622 if (pblk_rb_read_to_bio(&pblk->rwb, rqd, pos, secs_to_sync, 623 secs_avail)) { 624 pblk_err(pblk, "corrupted write bio\n"); 625 goto fail_put_bio; 626 } 627 628 if (pblk_submit_io_set(pblk, rqd)) 629 goto fail_free_bio; 630 631#ifdef CONFIG_NVM_PBLK_DEBUG 632 atomic_long_add(secs_to_sync, &pblk->sub_writes); 633#endif 634 635 *secs_left = 1; 636 return 0; 637 638fail_free_bio: 639 pblk_free_write_rqd(pblk, rqd); 640fail_put_bio: 641 bio_put(bio); 642 pblk_free_rqd(pblk, rqd, PBLK_WRITE); 643 644 return -EINTR; 645} 646 647int pblk_write_ts(void *data) 648{ 649 struct pblk *pblk = data; 650 int secs_left; 651 int write_failure = 0; 652 653 while (!kthread_should_stop()) { 654 if (!write_failure) { 655 write_failure = pblk_submit_write(pblk, &secs_left); 656 657 if (secs_left) 658 continue; 659 } 660 set_current_state(TASK_INTERRUPTIBLE); 661 io_schedule(); 662 } 663 664 return 0; 665} 666