linux-imx

// 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);