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path: root/drivers/lightnvm/pblk-recovery.c
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Diffstat (limited to 'drivers/lightnvm/pblk-recovery.c')
-rw-r--r--drivers/lightnvm/pblk-recovery.c874
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;
-}