1 files changed, 0 insertions, 875 deletions

diff --git a/drivers/lightnvm/pblk-recovery.c b/drivers/lightnvm/pblk-recovery.c
deleted file mode 100644
index 299ef47a17b2..000000000000
--- a/drivers/lightnvm/pblk-recovery.c
+++ /dev/null
@@ -1,875 +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) {
-			guid_copy(&pblk->instance_uuid,
-				  (guid_t *)&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;
-}