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lightnvm: pblk: only try to recover lines with written smeta 

When switching between different lun configurations, there is no
guarantee that all lines that contain closed/open chunks have some
valid data to recover.

Check that the smeta chunk has been written to instead. Also
skip bad lines (that does not have enough good chunks).

Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
hifive-unleashed-5.1
Hans Holmberg 2018-06-01 16:41:12 +02:00 committed by Jens Axboe
parent 87cc40bbe3
commit b06be2873d
1 changed files with 21 additions and 9 deletions
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30
drivers/lightnvm/pblk-recovery.c
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@ -774,18 +774,30 @@ static void pblk_recov_wa_counters(struct pblk *pblk,
}
static int pblk_line_was_written(struct pblk_line *line,
struct pblk_line_meta *lm)
struct pblk *pblk)
{
int i;
int state_mask = NVM_CHK_ST_OFFLINE | NVM_CHK_ST_FREE;
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;
for (i = 0; i < lm->blk_per_line; i++) {
if (!(line->chks[i].state & state_mask))
return 1;
}
if (line->state == PBLK_LINESTATE_BAD)
return 0;
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_FREE)
return 0;
return 1;
}
struct pblk_line *pblk_recov_l2p(struct pblk *pblk)
@ -824,7 +836,7 @@ struct pblk_line *pblk_recov_l2p(struct pblk *pblk)
line->lun_bitmap = ((void *)(smeta_buf)) +
sizeof(struct line_smeta);
if (!pblk_line_was_written(line, lm))
if (!pblk_line_was_written(line, pblk))
continue;
/* Lines that cannot be read are assumed as not written here */