diff options
Diffstat (limited to 'drivers/lightnvm/pblk-recovery.c')
| -rw-r--r-- | drivers/lightnvm/pblk-recovery.c | 874 |
1 files changed, 0 insertions, 874 deletions
diff --git a/drivers/lightnvm/pblk-recovery.c b/drivers/lightnvm/pblk-recovery.c deleted file mode 100644 index 0e6f0c76e930..000000000000 --- a/drivers/lightnvm/pblk-recovery.c +++ /dev/null @@ -1,874 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (C) 2016 CNEX Labs - * Initial: Javier Gonzalez <javier@cnexlabs.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License version - * 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * pblk-recovery.c - pblk's recovery path - * - * The L2P recovery path is single threaded as the L2P table is updated in order - * following the line sequence ID. - */ - -#include "pblk.h" -#include "pblk-trace.h" - -int pblk_recov_check_emeta(struct pblk *pblk, struct line_emeta *emeta_buf) -{ - u32 crc; - - crc = pblk_calc_emeta_crc(pblk, emeta_buf); - if (le32_to_cpu(emeta_buf->crc) != crc) - return 1; - - if (le32_to_cpu(emeta_buf->header.identifier) != PBLK_MAGIC) - return 1; - - return 0; -} - -static int pblk_recov_l2p_from_emeta(struct pblk *pblk, struct pblk_line *line) -{ - struct nvm_tgt_dev *dev = pblk->dev; - struct nvm_geo *geo = &dev->geo; - struct pblk_line_meta *lm = &pblk->lm; - struct pblk_emeta *emeta = line->emeta; - struct line_emeta *emeta_buf = emeta->buf; - __le64 *lba_list; - u64 data_start, data_end; - u64 nr_valid_lbas, nr_lbas = 0; - u64 i; - - lba_list = emeta_to_lbas(pblk, emeta_buf); - if (!lba_list) - return 1; - - data_start = pblk_line_smeta_start(pblk, line) + lm->smeta_sec; - data_end = line->emeta_ssec; - nr_valid_lbas = le64_to_cpu(emeta_buf->nr_valid_lbas); - - for (i = data_start; i < data_end; i++) { - struct ppa_addr ppa; - int pos; - - ppa = addr_to_gen_ppa(pblk, i, line->id); - pos = pblk_ppa_to_pos(geo, ppa); - - /* Do not update bad blocks */ - if (test_bit(pos, line->blk_bitmap)) - continue; - - if (le64_to_cpu(lba_list[i]) == ADDR_EMPTY) { - spin_lock(&line->lock); - if (test_and_set_bit(i, line->invalid_bitmap)) - WARN_ONCE(1, "pblk: rec. double invalidate:\n"); - else - le32_add_cpu(line->vsc, -1); - spin_unlock(&line->lock); - - continue; - } - - pblk_update_map(pblk, le64_to_cpu(lba_list[i]), ppa); - nr_lbas++; - } - - if (nr_valid_lbas != nr_lbas) - pblk_err(pblk, "line %d - inconsistent lba list(%llu/%llu)\n", - line->id, nr_valid_lbas, nr_lbas); - - line->left_msecs = 0; - - return 0; -} - -static void pblk_update_line_wp(struct pblk *pblk, struct pblk_line *line, - u64 written_secs) -{ - struct pblk_line_mgmt *l_mg = &pblk->l_mg; - int i; - - for (i = 0; i < written_secs; i += pblk->min_write_pgs) - __pblk_alloc_page(pblk, line, pblk->min_write_pgs); - - spin_lock(&l_mg->free_lock); - if (written_secs > line->left_msecs) { - /* - * We have all data sectors written - * and some emeta sectors written too. - */ - line->left_msecs = 0; - } else { - /* We have only some data sectors written. */ - line->left_msecs -= written_secs; - } - spin_unlock(&l_mg->free_lock); -} - -static u64 pblk_sec_in_open_line(struct pblk *pblk, struct pblk_line *line) -{ - struct pblk_line_meta *lm = &pblk->lm; - int nr_bb = bitmap_weight(line->blk_bitmap, lm->blk_per_line); - u64 written_secs = 0; - int valid_chunks = 0; - int i; - - for (i = 0; i < lm->blk_per_line; i++) { - struct nvm_chk_meta *chunk = &line->chks[i]; - - if (chunk->state & NVM_CHK_ST_OFFLINE) - continue; - - written_secs += chunk->wp; - valid_chunks++; - } - - if (lm->blk_per_line - nr_bb != valid_chunks) - pblk_err(pblk, "recovery line %d is bad\n", line->id); - - pblk_update_line_wp(pblk, line, written_secs - lm->smeta_sec); - - return written_secs; -} - -struct pblk_recov_alloc { - struct ppa_addr *ppa_list; - void *meta_list; - struct nvm_rq *rqd; - void *data; - dma_addr_t dma_ppa_list; - dma_addr_t dma_meta_list; -}; - -static void pblk_recov_complete(struct kref *ref) -{ - struct pblk_pad_rq *pad_rq = container_of(ref, struct pblk_pad_rq, ref); - - complete(&pad_rq->wait); -} - -static void pblk_end_io_recov(struct nvm_rq *rqd) -{ - struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd); - struct pblk_pad_rq *pad_rq = rqd->private; - struct pblk *pblk = pad_rq->pblk; - - pblk_up_chunk(pblk, ppa_list[0]); - - pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); - - atomic_dec(&pblk->inflight_io); - kref_put(&pad_rq->ref, pblk_recov_complete); -} - -/* pad line using line bitmap. */ -static int pblk_recov_pad_line(struct pblk *pblk, struct pblk_line *line, - int left_ppas) -{ - struct nvm_tgt_dev *dev = pblk->dev; - struct nvm_geo *geo = &dev->geo; - void *meta_list; - struct pblk_pad_rq *pad_rq; - struct nvm_rq *rqd; - struct ppa_addr *ppa_list; - void *data; - __le64 *lba_list = emeta_to_lbas(pblk, line->emeta->buf); - u64 w_ptr = line->cur_sec; - int left_line_ppas, rq_ppas; - int i, j; - int ret = 0; - - spin_lock(&line->lock); - left_line_ppas = line->left_msecs; - spin_unlock(&line->lock); - - pad_rq = kmalloc(sizeof(struct pblk_pad_rq), GFP_KERNEL); - if (!pad_rq) - return -ENOMEM; - - data = vzalloc(array_size(pblk->max_write_pgs, geo->csecs)); - if (!data) { - ret = -ENOMEM; - goto free_rq; - } - - pad_rq->pblk = pblk; - init_completion(&pad_rq->wait); - kref_init(&pad_rq->ref); - -next_pad_rq: - rq_ppas = pblk_calc_secs(pblk, left_ppas, 0, false); - if (rq_ppas < pblk->min_write_pgs) { - pblk_err(pblk, "corrupted pad line %d\n", line->id); - goto fail_complete; - } - - rqd = pblk_alloc_rqd(pblk, PBLK_WRITE_INT); - - ret = pblk_alloc_rqd_meta(pblk, rqd); - if (ret) { - pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); - goto fail_complete; - } - - rqd->bio = NULL; - rqd->opcode = NVM_OP_PWRITE; - rqd->is_seq = 1; - rqd->nr_ppas = rq_ppas; - rqd->end_io = pblk_end_io_recov; - rqd->private = pad_rq; - - ppa_list = nvm_rq_to_ppa_list(rqd); - meta_list = rqd->meta_list; - - for (i = 0; i < rqd->nr_ppas; ) { - struct ppa_addr ppa; - int pos; - - w_ptr = pblk_alloc_page(pblk, line, pblk->min_write_pgs); - ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); - pos = pblk_ppa_to_pos(geo, ppa); - - while (test_bit(pos, line->blk_bitmap)) { - w_ptr += pblk->min_write_pgs; - ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); - pos = pblk_ppa_to_pos(geo, ppa); - } - - for (j = 0; j < pblk->min_write_pgs; j++, i++, w_ptr++) { - struct ppa_addr dev_ppa; - struct pblk_sec_meta *meta; - __le64 addr_empty = cpu_to_le64(ADDR_EMPTY); - - dev_ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); - - pblk_map_invalidate(pblk, dev_ppa); - lba_list[w_ptr] = addr_empty; - meta = pblk_get_meta(pblk, meta_list, i); - meta->lba = addr_empty; - ppa_list[i] = dev_ppa; - } - } - - kref_get(&pad_rq->ref); - pblk_down_chunk(pblk, ppa_list[0]); - - ret = pblk_submit_io(pblk, rqd, data); - if (ret) { - pblk_err(pblk, "I/O submission failed: %d\n", ret); - pblk_up_chunk(pblk, ppa_list[0]); - kref_put(&pad_rq->ref, pblk_recov_complete); - pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); - goto fail_complete; - } - - left_line_ppas -= rq_ppas; - left_ppas -= rq_ppas; - if (left_ppas && left_line_ppas) - goto next_pad_rq; - -fail_complete: - kref_put(&pad_rq->ref, pblk_recov_complete); - wait_for_completion(&pad_rq->wait); - - if (!pblk_line_is_full(line)) - pblk_err(pblk, "corrupted padded line: %d\n", line->id); - - vfree(data); -free_rq: - kfree(pad_rq); - return ret; -} - -static int pblk_pad_distance(struct pblk *pblk, struct pblk_line *line) -{ - struct nvm_tgt_dev *dev = pblk->dev; - struct nvm_geo *geo = &dev->geo; - int distance = geo->mw_cunits * geo->all_luns * geo->ws_opt; - - return (distance > line->left_msecs) ? line->left_msecs : distance; -} - -/* Return a chunk belonging to a line by stripe(write order) index */ -static struct nvm_chk_meta *pblk_get_stripe_chunk(struct pblk *pblk, - struct pblk_line *line, - int index) -{ - struct nvm_tgt_dev *dev = pblk->dev; - struct nvm_geo *geo = &dev->geo; - struct pblk_lun *rlun; - struct ppa_addr ppa; - int pos; - - rlun = &pblk->luns[index]; - ppa = rlun->bppa; - pos = pblk_ppa_to_pos(geo, ppa); - - return &line->chks[pos]; -} - -static int pblk_line_wps_are_unbalanced(struct pblk *pblk, - struct pblk_line *line) -{ - struct pblk_line_meta *lm = &pblk->lm; - int blk_in_line = lm->blk_per_line; - struct nvm_chk_meta *chunk; - u64 max_wp, min_wp; - int i; - - i = find_first_zero_bit(line->blk_bitmap, blk_in_line); - - /* If there is one or zero good chunks in the line, - * the write pointers can't be unbalanced. - */ - if (i >= (blk_in_line - 1)) - return 0; - - chunk = pblk_get_stripe_chunk(pblk, line, i); - max_wp = chunk->wp; - if (max_wp > pblk->max_write_pgs) - min_wp = max_wp - pblk->max_write_pgs; - else - min_wp = 0; - - i = find_next_zero_bit(line->blk_bitmap, blk_in_line, i + 1); - while (i < blk_in_line) { - chunk = pblk_get_stripe_chunk(pblk, line, i); - if (chunk->wp > max_wp || chunk->wp < min_wp) - return 1; - - i = find_next_zero_bit(line->blk_bitmap, blk_in_line, i + 1); - } - - return 0; -} - -static int pblk_recov_scan_oob(struct pblk *pblk, struct pblk_line *line, - struct pblk_recov_alloc p) -{ - struct nvm_tgt_dev *dev = pblk->dev; - struct pblk_line_meta *lm = &pblk->lm; - struct nvm_geo *geo = &dev->geo; - struct ppa_addr *ppa_list; - void *meta_list; - struct nvm_rq *rqd; - void *data; - dma_addr_t dma_ppa_list, dma_meta_list; - __le64 *lba_list; - u64 paddr = pblk_line_smeta_start(pblk, line) + lm->smeta_sec; - bool padded = false; - int rq_ppas; - int i, j; - int ret; - u64 left_ppas = pblk_sec_in_open_line(pblk, line) - lm->smeta_sec; - - if (pblk_line_wps_are_unbalanced(pblk, line)) - pblk_warn(pblk, "recovering unbalanced line (%d)\n", line->id); - - ppa_list = p.ppa_list; - meta_list = p.meta_list; - rqd = p.rqd; - data = p.data; - dma_ppa_list = p.dma_ppa_list; - dma_meta_list = p.dma_meta_list; - - lba_list = emeta_to_lbas(pblk, line->emeta->buf); - -next_rq: - memset(rqd, 0, pblk_g_rq_size); - - rq_ppas = pblk_calc_secs(pblk, left_ppas, 0, false); - if (!rq_ppas) - rq_ppas = pblk->min_write_pgs; - -retry_rq: - rqd->bio = NULL; - rqd->opcode = NVM_OP_PREAD; - rqd->meta_list = meta_list; - rqd->nr_ppas = rq_ppas; - rqd->ppa_list = ppa_list; - rqd->dma_ppa_list = dma_ppa_list; - rqd->dma_meta_list = dma_meta_list; - ppa_list = nvm_rq_to_ppa_list(rqd); - - if (pblk_io_aligned(pblk, rq_ppas)) - rqd->is_seq = 1; - - for (i = 0; i < rqd->nr_ppas; ) { - struct ppa_addr ppa; - int pos; - - ppa = addr_to_gen_ppa(pblk, paddr, line->id); - pos = pblk_ppa_to_pos(geo, ppa); - - while (test_bit(pos, line->blk_bitmap)) { - paddr += pblk->min_write_pgs; - ppa = addr_to_gen_ppa(pblk, paddr, line->id); - pos = pblk_ppa_to_pos(geo, ppa); - } - - for (j = 0; j < pblk->min_write_pgs; j++, i++) - ppa_list[i] = - addr_to_gen_ppa(pblk, paddr + j, line->id); - } - - ret = pblk_submit_io_sync(pblk, rqd, data); - if (ret) { - pblk_err(pblk, "I/O submission failed: %d\n", ret); - return ret; - } - - atomic_dec(&pblk->inflight_io); - - /* If a read fails, do a best effort by padding the line and retrying */ - if (rqd->error && rqd->error != NVM_RSP_WARN_HIGHECC) { - int pad_distance, ret; - - if (padded) { - pblk_log_read_err(pblk, rqd); - return -EINTR; - } - - pad_distance = pblk_pad_distance(pblk, line); - ret = pblk_recov_pad_line(pblk, line, pad_distance); - if (ret) { - return ret; - } - - padded = true; - goto retry_rq; - } - - pblk_get_packed_meta(pblk, rqd); - - for (i = 0; i < rqd->nr_ppas; i++) { - struct pblk_sec_meta *meta = pblk_get_meta(pblk, meta_list, i); - u64 lba = le64_to_cpu(meta->lba); - - lba_list[paddr++] = cpu_to_le64(lba); - - if (lba == ADDR_EMPTY || lba >= pblk->capacity) - continue; - - line->nr_valid_lbas++; - pblk_update_map(pblk, lba, ppa_list[i]); - } - - left_ppas -= rq_ppas; - if (left_ppas > 0) - goto next_rq; - -#ifdef CONFIG_NVM_PBLK_DEBUG - WARN_ON(padded && !pblk_line_is_full(line)); -#endif - - return 0; -} - -/* Scan line for lbas on out of bound area */ -static int pblk_recov_l2p_from_oob(struct pblk *pblk, struct pblk_line *line) -{ - struct nvm_tgt_dev *dev = pblk->dev; - struct nvm_geo *geo = &dev->geo; - struct nvm_rq *rqd; - struct ppa_addr *ppa_list; - void *meta_list; - struct pblk_recov_alloc p; - void *data; - dma_addr_t dma_ppa_list, dma_meta_list; - int ret = 0; - - meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, &dma_meta_list); - if (!meta_list) - return -ENOMEM; - - ppa_list = (void *)(meta_list) + pblk_dma_meta_size(pblk); - dma_ppa_list = dma_meta_list + pblk_dma_meta_size(pblk); - - data = kcalloc(pblk->max_write_pgs, geo->csecs, GFP_KERNEL); - if (!data) { - ret = -ENOMEM; - goto free_meta_list; - } - - rqd = mempool_alloc(&pblk->r_rq_pool, GFP_KERNEL); - memset(rqd, 0, pblk_g_rq_size); - - p.ppa_list = ppa_list; - p.meta_list = meta_list; - p.rqd = rqd; - p.data = data; - p.dma_ppa_list = dma_ppa_list; - p.dma_meta_list = dma_meta_list; - - ret = pblk_recov_scan_oob(pblk, line, p); - if (ret) { - pblk_err(pblk, "could not recover L2P form OOB\n"); - goto out; - } - - if (pblk_line_is_full(line)) - pblk_line_recov_close(pblk, line); - -out: - mempool_free(rqd, &pblk->r_rq_pool); - kfree(data); -free_meta_list: - nvm_dev_dma_free(dev->parent, meta_list, dma_meta_list); - - return ret; -} - -/* Insert lines ordered by sequence number (seq_num) on list */ -static void pblk_recov_line_add_ordered(struct list_head *head, - struct pblk_line *line) -{ - struct pblk_line *t = NULL; - - list_for_each_entry(t, head, list) - if (t->seq_nr > line->seq_nr) - break; - - __list_add(&line->list, t->list.prev, &t->list); -} - -static u64 pblk_line_emeta_start(struct pblk *pblk, struct pblk_line *line) -{ - struct nvm_tgt_dev *dev = pblk->dev; - struct nvm_geo *geo = &dev->geo; - struct pblk_line_meta *lm = &pblk->lm; - unsigned int emeta_secs; - u64 emeta_start; - struct ppa_addr ppa; - int pos; - - emeta_secs = lm->emeta_sec[0]; - emeta_start = lm->sec_per_line; - - while (emeta_secs) { - emeta_start--; - ppa = addr_to_gen_ppa(pblk, emeta_start, line->id); - pos = pblk_ppa_to_pos(geo, ppa); - if (!test_bit(pos, line->blk_bitmap)) - emeta_secs--; - } - - return emeta_start; -} - -static int pblk_recov_check_line_version(struct pblk *pblk, - struct line_emeta *emeta) -{ - struct line_header *header = &emeta->header; - - if (header->version_major != EMETA_VERSION_MAJOR) { - pblk_err(pblk, "line major version mismatch: %d, expected: %d\n", - header->version_major, EMETA_VERSION_MAJOR); - return 1; - } - -#ifdef CONFIG_NVM_PBLK_DEBUG - if (header->version_minor > EMETA_VERSION_MINOR) - pblk_info(pblk, "newer line minor version found: %d\n", - header->version_minor); -#endif - - return 0; -} - -static void pblk_recov_wa_counters(struct pblk *pblk, - struct line_emeta *emeta) -{ - struct pblk_line_meta *lm = &pblk->lm; - struct line_header *header = &emeta->header; - struct wa_counters *wa = emeta_to_wa(lm, emeta); - - /* WA counters were introduced in emeta version 0.2 */ - if (header->version_major > 0 || header->version_minor >= 2) { - u64 user = le64_to_cpu(wa->user); - u64 pad = le64_to_cpu(wa->pad); - u64 gc = le64_to_cpu(wa->gc); - - atomic64_set(&pblk->user_wa, user); - atomic64_set(&pblk->pad_wa, pad); - atomic64_set(&pblk->gc_wa, gc); - - pblk->user_rst_wa = user; - pblk->pad_rst_wa = pad; - pblk->gc_rst_wa = gc; - } -} - -static int pblk_line_was_written(struct pblk_line *line, - struct pblk *pblk) -{ - - struct pblk_line_meta *lm = &pblk->lm; - struct nvm_tgt_dev *dev = pblk->dev; - struct nvm_geo *geo = &dev->geo; - struct nvm_chk_meta *chunk; - struct ppa_addr bppa; - int smeta_blk; - - if (line->state == PBLK_LINESTATE_BAD) - return 0; - - smeta_blk = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line); - if (smeta_blk >= lm->blk_per_line) - return 0; - - bppa = pblk->luns[smeta_blk].bppa; - chunk = &line->chks[pblk_ppa_to_pos(geo, bppa)]; - - if (chunk->state & NVM_CHK_ST_CLOSED || - (chunk->state & NVM_CHK_ST_OPEN - && chunk->wp >= lm->smeta_sec)) - return 1; - - return 0; -} - -static bool pblk_line_is_open(struct pblk *pblk, struct pblk_line *line) -{ - struct pblk_line_meta *lm = &pblk->lm; - int i; - - for (i = 0; i < lm->blk_per_line; i++) - if (line->chks[i].state & NVM_CHK_ST_OPEN) - return true; - - return false; -} - -struct pblk_line *pblk_recov_l2p(struct pblk *pblk) -{ - struct pblk_line_meta *lm = &pblk->lm; - struct pblk_line_mgmt *l_mg = &pblk->l_mg; - struct pblk_line *line, *tline, *data_line = NULL; - struct pblk_smeta *smeta; - struct pblk_emeta *emeta; - struct line_smeta *smeta_buf; - int found_lines = 0, recovered_lines = 0, open_lines = 0; - int is_next = 0; - int meta_line; - int i, valid_uuid = 0; - LIST_HEAD(recov_list); - - /* TODO: Implement FTL snapshot */ - - /* Scan recovery - takes place when FTL snapshot fails */ - spin_lock(&l_mg->free_lock); - meta_line = find_first_zero_bit(&l_mg->meta_bitmap, PBLK_DATA_LINES); - set_bit(meta_line, &l_mg->meta_bitmap); - smeta = l_mg->sline_meta[meta_line]; - emeta = l_mg->eline_meta[meta_line]; - smeta_buf = (struct line_smeta *)smeta; - spin_unlock(&l_mg->free_lock); - - /* Order data lines using their sequence number */ - for (i = 0; i < l_mg->nr_lines; i++) { - u32 crc; - - line = &pblk->lines[i]; - - memset(smeta, 0, lm->smeta_len); - line->smeta = smeta; - line->lun_bitmap = ((void *)(smeta_buf)) + - sizeof(struct line_smeta); - - if (!pblk_line_was_written(line, pblk)) - continue; - - /* Lines that cannot be read are assumed as not written here */ - if (pblk_line_smeta_read(pblk, line)) - continue; - - crc = pblk_calc_smeta_crc(pblk, smeta_buf); - if (le32_to_cpu(smeta_buf->crc) != crc) - continue; - - if (le32_to_cpu(smeta_buf->header.identifier) != PBLK_MAGIC) - continue; - - if (smeta_buf->header.version_major != SMETA_VERSION_MAJOR) { - pblk_err(pblk, "found incompatible line version %u\n", - smeta_buf->header.version_major); - return ERR_PTR(-EINVAL); - } - - /* The first valid instance uuid is used for initialization */ - if (!valid_uuid) { - import_guid(&pblk->instance_uuid, smeta_buf->header.uuid); - valid_uuid = 1; - } - - if (!guid_equal(&pblk->instance_uuid, - (guid_t *)&smeta_buf->header.uuid)) { - pblk_debug(pblk, "ignore line %u due to uuid mismatch\n", - i); - continue; - } - - /* Update line metadata */ - spin_lock(&line->lock); - line->id = le32_to_cpu(smeta_buf->header.id); - line->type = le16_to_cpu(smeta_buf->header.type); - line->seq_nr = le64_to_cpu(smeta_buf->seq_nr); - spin_unlock(&line->lock); - - /* Update general metadata */ - spin_lock(&l_mg->free_lock); - if (line->seq_nr >= l_mg->d_seq_nr) - l_mg->d_seq_nr = line->seq_nr + 1; - l_mg->nr_free_lines--; - spin_unlock(&l_mg->free_lock); - - if (pblk_line_recov_alloc(pblk, line)) - goto out; - - pblk_recov_line_add_ordered(&recov_list, line); - found_lines++; - pblk_debug(pblk, "recovering data line %d, seq:%llu\n", - line->id, smeta_buf->seq_nr); - } - - if (!found_lines) { - guid_gen(&pblk->instance_uuid); - - spin_lock(&l_mg->free_lock); - WARN_ON_ONCE(!test_and_clear_bit(meta_line, - &l_mg->meta_bitmap)); - spin_unlock(&l_mg->free_lock); - - goto out; - } - - /* Verify closed blocks and recover this portion of L2P table*/ - list_for_each_entry_safe(line, tline, &recov_list, list) { - recovered_lines++; - - line->emeta_ssec = pblk_line_emeta_start(pblk, line); - line->emeta = emeta; - memset(line->emeta->buf, 0, lm->emeta_len[0]); - - if (pblk_line_is_open(pblk, line)) { - pblk_recov_l2p_from_oob(pblk, line); - goto next; - } - - if (pblk_line_emeta_read(pblk, line, line->emeta->buf)) { - pblk_recov_l2p_from_oob(pblk, line); - goto next; - } - - if (pblk_recov_check_emeta(pblk, line->emeta->buf)) { - pblk_recov_l2p_from_oob(pblk, line); - goto next; - } - - if (pblk_recov_check_line_version(pblk, line->emeta->buf)) - return ERR_PTR(-EINVAL); - - pblk_recov_wa_counters(pblk, line->emeta->buf); - - if (pblk_recov_l2p_from_emeta(pblk, line)) - pblk_recov_l2p_from_oob(pblk, line); - -next: - if (pblk_line_is_full(line)) { - struct list_head *move_list; - - spin_lock(&line->lock); - line->state = PBLK_LINESTATE_CLOSED; - trace_pblk_line_state(pblk_disk_name(pblk), line->id, - line->state); - move_list = pblk_line_gc_list(pblk, line); - spin_unlock(&line->lock); - - spin_lock(&l_mg->gc_lock); - list_move_tail(&line->list, move_list); - spin_unlock(&l_mg->gc_lock); - - mempool_free(line->map_bitmap, l_mg->bitmap_pool); - line->map_bitmap = NULL; - line->smeta = NULL; - line->emeta = NULL; - } else { - spin_lock(&line->lock); - line->state = PBLK_LINESTATE_OPEN; - spin_unlock(&line->lock); - - line->emeta->mem = 0; - atomic_set(&line->emeta->sync, 0); - - trace_pblk_line_state(pblk_disk_name(pblk), line->id, - line->state); - - data_line = line; - line->meta_line = meta_line; - - open_lines++; - } - } - - if (!open_lines) { - spin_lock(&l_mg->free_lock); - WARN_ON_ONCE(!test_and_clear_bit(meta_line, - &l_mg->meta_bitmap)); - spin_unlock(&l_mg->free_lock); - } else { - spin_lock(&l_mg->free_lock); - l_mg->data_line = data_line; - /* Allocate next line for preparation */ - l_mg->data_next = pblk_line_get(pblk); - if (l_mg->data_next) { - l_mg->data_next->seq_nr = l_mg->d_seq_nr++; - l_mg->data_next->type = PBLK_LINETYPE_DATA; - is_next = 1; - } - spin_unlock(&l_mg->free_lock); - } - - if (is_next) - pblk_line_erase(pblk, l_mg->data_next); - -out: - if (found_lines != recovered_lines) - pblk_err(pblk, "failed to recover all found lines %d/%d\n", - found_lines, recovered_lines); - - return data_line; -} - -/* - * Pad current line - */ -int pblk_recov_pad(struct pblk *pblk) -{ - struct pblk_line *line; - struct pblk_line_mgmt *l_mg = &pblk->l_mg; - int left_msecs; - int ret = 0; - - spin_lock(&l_mg->free_lock); - line = l_mg->data_line; - left_msecs = line->left_msecs; - spin_unlock(&l_mg->free_lock); - - ret = pblk_recov_pad_line(pblk, line, left_msecs); - if (ret) { - pblk_err(pblk, "tear down padding failed (%d)\n", ret); - return ret; - } - - pblk_line_close_meta(pblk, line); - return ret; -} |